The use of YouTube by the Spanish press: A model to be defined

The instability in the newspaper business model since the emergence of the Internet disrupted the value chain and has led newspapers to turn to videos as an additional source of revenue. YouTube has become the content distribution channel of choice for most newspapers, which benefit from the ability to generate greater traffic in exchange for a blind contract imposed by YouTube’s algorithm. Advertising income from this source is still scarce and depends on engagement, previous user experience, video quality, video reputation and numerous other factors. Based on an analysis of 864 videos over three randomly selected weeks, conclusions are reached, and the consequences of the management of the YouTube channels of six Spanish newspapers are discussed

A Conserved Bach Current

The Bach tensor and a vector which generates conformal symmetries allow a conserved four-current to be defined. The Bach four-current gives rise to a quasilocal two-surface expression for power per luminosity distance in the Vaidya exterior of collapsing fluid interiors. This is interpreted in terms of entropy generation.Comment: to appear in Class. Quantum Gra

Normal forms for underactuated mechanical systems with symmetry

We introduce cascade normal forms for underactuated mechanical systems that are convenient for control design. These normal forms include three classes of cascade systems, namely, nonlinear systems in strict feedback form, feedforward form, and nontriangular quadratic form (to be defined). In each case, the transformation to cascade systems is provided in closed-form. We apply our results to the Acrobot, the rotating pendulum, and the cart-pole system

A supersymmetric 3-4-1 model

We build the complete supersymmetric version of a 3-4-1 gauge model using the superfield formalism. We point out that a discrete symmetry, similar to the R-symmetry in the minimal supersymmetric standard model, is possible to be defined in this model. Hence we have both R-conserving and R-violating possibilities. We also discuss some phenomenological results coming from this model.Comment: 23 pages, 2 figures and 1tabl

Fearless Friday: Friend or Foe

Friend or FOE, a recent addition to our campus offers queer students and their allies an opportunity to connect more socially and establish a mutual understanding of their experiences on campus. The group defines itself as having a less activist approach, rather, their main focus is to create a medium for students who feel that while their sexual orientation is important it is not necessarily something they want to be defined by. [excerpt