Neutrinos as probes of Lorentz invariance

Neutrinos can be used to search for deviations from exact Lorentz invariance. The worldwide experimental program in neutrino physics makes these particles a remarkable tool to search for a variety of signals that could reveal minute relativity violations. This paper reviews the generic experimental signatures of the breakdown of Lorentz symmetry in the neutrino sector.Comment: 10 pages, 4 figures; Review article published in the special issue "Through Neutrino Eyes: The Search for New Physics" of Advances in High Energy Physic

Lorentz and CPT violation in neutrino oscillations

Neutrino oscillations in the presence of Lorentz violation can present novel observable signals in both long- and short-baseline experiments. In this talk we describe the theory and its different regimes depending on properties of the experiments. CPT violation, its systematic search and possible connections to latest results are also presented.Comment: Presented at the Fifth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 28-July 2, 201

Boolean Differential Operators

We consider four combinatorial interpretations for the algebra of Boolean differential operators. We show that each interpretation yields an explicit matrix representation for Boolean differential operators

Needed Specialists for a Challenging Task: Formerly Incarcerated Leaders’ Essential Role in Postsecondary Programs in Prison

U.S. President Lyndon B. Johnson’s 1967 Commission on Law Enforcement and Administration of Justice called for a massive increase in teachers prepared to assist in the delivery of academic programs for incarcerated people. “Substantial subsidies are needed to recruit needed specialists,” they wrote, “and to provide them with the training required to make them effective in their complex and challenging task.” Half a century later, the persistent educational deficits and need for empowering postsecondary academic programs in prisons across the United States and the world are being addressed by a wide range of responses from specialists in higher education, corrections, and research. Too often overlooked, however, are the perspectives of those specialists whose expertise comes in part from lived experience: directly affected people leading successful and meaningful interventions in rehabilitation and reentry. This paper examines the development and administration of Hudson Link for Higher Education in Prison, an in-prison college program run and staffed primarily by its own formerly incarcerated graduates. The importance of foregrounding the voices of directly affected people by placing them in positions of true leadership and authority – not merely as symbolic gestures or tokens – in Hudson Link’s program design and implementation is explained. Finally, the paper explores the impact of lived experience on managing and teaching in the program, as well as strategies for academic partners looking to best support interventions led by those who are closest to the problem and, in turn, closest to the solution

Needed Specialists for a Challenging Task: Formerly Incarcerated Leaders’ Essential Role in Postsecondary Programs in Prison

U.S. President Lyndon B. Johnson’s 1967 Commission on Law Enforcement and Administration of Justice called for a massive increase in teachers prepared to assist in the delivery of academic programs for incarcerated people. “Substantial subsidies are needed to recruit needed specialists,” they wrote, “and to provide them with the training required to make them effective in their complex and challenging task.” Half a century later, the persistent educational deficits and need for empowering postsecondary academic programs in prisons across the United States and the world are being addressed by a wide range of responses from specialists in higher education, corrections, and research. Too often overlooked, however, are the perspectives of those specialists whose expertise comes in part from lived experience: directly affected people leading successful and meaningful interventions in rehabilitation and reentry. This paper examines the development and administration of Hudson Link for Higher Education in Prison, an in-prison college program run and staffed primarily by its own formerly incarcerated graduates. The importance of foregrounding the voices of directly affected people by placing them in positions of true leadership and authority – not merely as symbolic gestures or tokens – in Hudson Link’s program design and implementation is explained. Finally, the paper explores the impact of lived experience on managing and teaching in the program, as well as strategies for academic partners looking to best support interventions led by those who are closest to the problem and, in turn, closest to the solution

A physical model of cell metabolism

Cell metabolism is characterized by three fundamental energy demands: to sustain cell maintenance, to trigger aerobic fermentation and to achieve maximum metabolic rate. The transition to aerobic fermentation and the maximum metabolic rate are currently understood based on enzymatic cost constraints. Yet, we are lacking a theory explaining the maintenance energy demand. Here we report a physical model of cell metabolism that explains the origin of these three energy scales. Our key hypothesis is that the maintenance energy demand is rooted on the energy expended by molecular motors to fluidize the cytoplasm and counteract molecular crowding. Using this model and independent parameter estimates we make predictions for the three energy scales that are in quantitative agreement with experimental values. The model also recapitulates the dependencies of cell growth with extracellular osmolarity and temperature. This theory brings together biophysics and cell biology in a tractable model that can be applied to understand key principles of cell metabolism