Uniformization, Unipotent Flows and the Riemann Hypothesis

We prove equidistribution of certain multidimensional unipotent flows in the moduli space of genus $g$ principally polarized abelian varieties (ppav). This is done by studying asymptotics of $\pmb{\Gamma}_{g} \sim Sp(2g,\mathbb{Z})$-automorphic forms averaged along unipotent flows, toward the codimension-one component of the boundary of the ppav moduli space. We prove a link between the error estimate and the Riemann hypothesis. Further, we prove $\pmb{\Gamma}_{g - r}$ modularity of the function obtained by iterating the unipotent average process $r$ times. This shows uniformization of modular integrals of automorphic functions via unipotent flows

Testing for the Ratchet Effect: Evidence from a Real-Effort Work Task

The "ratchet effect" refers to a phenomenon where workers whose compensation is based on productivity strategically restrict their output, relative to their capability, because they rationally anticipate that high levels of output will be met with increased or "ratcheted-up" expectations in the future. While there is ample anecdotal evidence suggesting the presence of the ratchet effect in real workplaces, it is difficult to actually empirically identify output restriction among workers. In this study, we implement a novel experimental design using a real-effort work task and a piece-rate incentive scheme to directly test for the presence of the ratchet effect using two different methods for evaluating productivity: (i) when productivity is evaluated based on the output of each individual worker, and (ii) when productivity is evaluated collectively based on the output of a group of workers. We find strong evidence of the ratchet effect when productivity is evaluated at the individual-level. However, we find very little evidence of the ratchet effect when productivity is evaluated collectively at the group-level. We attribute the latter result to the free-riding incentive that emerges when productivity is evaluated at the group-level. Furthermore, we find the ratchet effect re-emerges if workers are able to communicate. Our experimental design, combined with using a real-effort work task, also allows us to shed light on an important dynamic implication of the ratchet effect that has not yet been examined in the literature – the role of the ratchet effect on future productivity via learning-by-doing

Entre Maquiavelo y Adorno : Louis Althusser y las relaciones entre teoría y práctica política. Una interpretación

La lectura de Maquiavelo realizada por Louis Althusser en la década de los '70, le permitirá a éste último recuperar y renovar los postulados del propio Marx y del marxismo "clásico", en aras de volverlos útiles y acordes para abordar las problemáticas que marcaba una coyuntura signada por la "crisis" del movimiento comunista internacional. En este marco, Althusser logrará -vía Maquiavelo- producir una nueva visión de la política -o, más específicamente, de la práctica política- en su relación con la "teoría". Por tanto, nos proponemos en este trabajo recorrer ese nuevo camino emprendido por el Althusser de los ?70, poniendo el foco en la novedosa interpretación del florentino a la que arribará el filósofo: la del Maquiavelo que trata de dar cuenta de un problema político concreto, marcado por la coyuntura histórica, imposible de ser tratado y reducido a una teoría general y sistemática. Por lo demás, y a partir de este abordaje que destacará la irreductibilidad de la (práctica) política a un sistema teórico abstracto, intentaremos, por último, producir un acercamiento entre estos análisis esbozados por el filósofo argelino- francés y los realizados por Theodor Adorno en su crítica al "pensamiento identitario", y sus consecuentes intentos de "salvar" la no-identidad del objeto con respecto al concept

Characteristics of Feedback that Influence Student Confidence and Performance during Mathematical Modeling

This study focuses on characteristics of written feedback that influence students’ performance and confidence in addressing the mathematical complexity embedded in a Model-Eliciting Activity (MEA). MEAs are authentic mathematical modeling problems that facilitate students’ iterative development of solutions in a realistic context. We analyzed 132 first-year engineering students’ confidence levels and mathematical model scores on aMEA(pre and post feedback), along with teaching assistant feedback given to the students. The findings show several examples of affective and cognitive feedback that students reported that they used to revise their models. Students’ performance and confidence in developing mathematical models can be increased when they are in an environment where they iteratively develop models based on effective feedback

Integrazione. Le barriere della comunicazione

L'importanza ormai ampiamente riconosciuta, della comunicazione interculturale come strumento di integrazione sociale e culturale degli stranieri e, dunque, come obiettivo delle politiche pubbliche. L'idea di integrazione cui si fa riferimento in questo contesto, rimanda ad una interazione positiva, sostenuta da una adeguata strategia comunicativa , con l\u2019obiettivo di favorire percorsi di inclusione e partecipazione alla vita pubblica locale. Alla base di questa idea di integrazione vi \ue8 la consapevolezza che il riconoscimento di taluni diritti di per s\ue9 non \ue8 sufficiente a garantirne il rispetto e la possibilit\ue0 di esercizio da parte dei soggetti titolari, se non accompagnato dalla messa in atto di strumenti di informazione e facilitazione adeguati ed efficaci a rendere effettivo tale esercizio. Realizzare condizioni di pari opportunit\ue0 di accesso ai servizi, compresi quelli informativi, \ue8 dunque un obiettivo ineludibile di una politica impegnata a promuovere la rimozione di ostacoli di ordine linguistico, sociale e culturale che impediscono alle persone straniere o a particolari porzioni della popolazione straniera (es. donne, richiedenti asilo e rifugiati, nomadi) la reale fruizione del \u201csistema dei servizi pubblici\u201d

Alpha-particle clustering in excited expanding self-conjugate nuclei

The fragmentation of quasi-projectiles from the nuclear reaction 40Ca + 12C at 25 MeV/nucleon was used to produce alpha-emission sources. From a careful selection of these sources provided by a complete detection and from comparisons with models of sequential and simultaneous decays, strong indications in favour of $\alpha$-particle clustering in excited 16O, 20Ne and 24}Mg are reported.Comment: 8 pages, 4 figures, 12th International Conference on Nucleus-Nucleus collisions (NN2015), 21-26 June 2015, Catania, Ital