A freely generated ring for N=1 models in class S_k

We study 4d N=1 supersymmetric theories of class S_k, obtained from flux compactifications on a Riemann surface of 6d (1,0) conformal theories describing the low energy physics on a stack of M5 branes probing a Z_k singularity. We conjecture that the protected spectrum of class S_k theories contains a freely generated ring, generalizing the Coulomb branch of the N=2 theories. We derive this by examining a limit of the supersymmetric index of 4d N=1 class S_k theories. The limit generalizes the Coulomb limit of N=2 theories, which coincides with the case of k=1 for a particular choice of flux. We conjecture a general simple formula for the index in the aforementioned limit.Comment: 26 pages, 5 figure

Holographic Turbulence in a Large Number of Dimensions

We consider relativistic hydrodynamics in the limit where the number of spatial dimensions is very large. We show that under certain restrictions, the resulting equations of motion simplify significantly. Holographic theories in a large number of dimensions satisfy the aforementioned restrictions and their dynamics are captured by hydrodynamics with a naturally truncated derivative expansion. Using analytic and numerical techniques we analyze two and three-dimensional turbulent flow of such fluids in various regimes and its relation to geometric data.Comment: 36 pages, 22 figure

Hacia la arquitectura bioambiental: uso racional de recursos hídricos en políticas de ordenación territorial: influencia de la Norma 26 en el diseño de sistemas para ahorro y reúso de agua en vivienda social

La conservación de recursos hídricos en México se ha convertido en tema prioritario dentro de las agendas gubernamentales; particularmente en la ciudad de México, donde convergen al menos tres administraciones, se formulan planes y proyectos de inversión encaminados a frenar el deterioro de las fuentes de abastecimiento y promover el consumo racional del agua. Sin embargo, la problemática que se enfrenta es muy compleja pues involucra factores físicos (naturales y urbanos), históricos, políticos, económicos y sociales. En respuesta a este reto, el Gobierno del Distrito Federal modificó la Norma 26 que incentiva la producción de vivienda social; la esencia de este cambio es la intención de vincular objetivos medioambientales con proyectos sociales. El presente trabajo pretende analizar la influencia que ejerce esta normatividad en la transformación del quehacer arquitectónico y urbanístico, con el fin de evidenciar la necesidad de implementar nuevos modelos de gestión capaces de adaptarse a los retos emergentes.The conservation of water resources in Mexico has become a major issue within government agendas, particularly in Mexico City, where they converge at least three administrations, formulating plans and investment projects designed to curb the deterioration of supply sources and promote rational water consumption. However, the problem it faces is very complex because it involves physical factors (natural and urban), historical, political, economic and social. In response to this challenge, the Government of the Federal District amended Rule 26 that encourages the production of social housing, the essence of this change intend to link environmental objectives with social projects. This paper aims to analyze the influence of this norm in the transformation of the architectonic and urban task, in order to highlight the need to implement new management models that can adapt to emerging challenges.Peer Reviewe

The Impact of a Teacher Mentoring Program On The Professional Satisfaction of Selected Veteran Teachers

The purpose of this naturalistic study was to show how a collaborative teacher-mentoring program influenced the professional goals of selected veteran teachers. The specific mentor program studied is a joint effort between the University of Nebraska at Omaha and designated local school districts aimed at the development of first year teachers by lifelong master teachers better known as CADRE Mentors. Using interviews, the investigator focused on four particulars: (1) CADRE Mentor applicants\u27 willingness to cross organizational borders, (2) The influence of personal circumstances and past experiences, (3) Teacher empowerment in relation to teacher satisfaction, (4) Teacher satisfaction and its relation to intrinsic rewards, and (5) The return of CADRE Mentors to their home school districts, as well as the residual impact of the mentoring experience. This investigation discovered that mentors were effected by the CADRE experience in different ways. One informant left the classroom for an administrative position. Another returned to the classroom but requested a position mentoring new teachers at her home school. Finally, a third teacher chose to remain in the classroom full-time. This study found a need for school districts to work closer with universities to help ease the transition of mentoring teachers back into the classroom. It is also important that school districts discover new ways to utilize the expertise of veteran teachers in their efforts to enhance school improvement

USING THE MUTUAL INFORMATION METRIC TO IMPROVE ACCESSIBILITY AND UNDERSTANDABILITY IN BUSINESS INTELLIGENCE TOOLS

The rapidly-growing organizational data resources introduce a growing difficulty to locate and understand the relevant data subsets within large datasets – what can be seen as a severe information quality issue in today\u27s decision-support environments. The study proposes a quantitative methodology, based on the mutual-information metric, for assessing the relative importance of different data subsets within a large dataset. Such assessments can grant the end-user with faster access to relevant subsets within a large dataset, the ability to better understandits contents, and gain deeper insights from analyzing it – e.g., when such a dataset is being used for Business Intelligence (BI) applications. This manuscript provides the background and the motivation for integrating the proposed assessments of relative importance. It then defines the calculations behind the mutualinformation metric, and demonstrates their applications using illustrative examples

A 5d perspective on the compactifications of 6d SCFTs to 4d N=1\mathcal{N}=1 SCFTs

Compactifying 6d superconformal field theories (SCFTs) to 4d $\mathcal{N}=1$ theories on two-punctured spheres (tubes) and tori with flux is realized using duality domain walls in 5d $\mathcal{N}=1$ Kaluza-Klein (KK) theories, which are usually denoted by $flux$ $domain$ $walls$. We revisit this construction and study it in detail from the 5d perspective, specifically rephrasing it using the box graph description of the extended Coulomb branch phases of 5d theories. This perspective could be helpful in understanding how to equivalently realize the 4d $\mathcal{N}=1$ models from geometric engineering in M-theory. Along the way, we show how to recover various properties of the 4d theories from the 5d perspective, such as the flux associated to the domain wall configurations and the presence of a $\mathfrak{u}(1)$ global symmetry in the 4d theory descending from the KK symmetry on the tube, which is broken to a discrete subgroup on a flux torus. We demonstrate all of these ideas using the rank 1 E-string theory.Comment: 50 pages, 16 figure

Using Instant Feedback System And Micro Exams To Enhance Active Learning

This paper presents the outcomes of the preliminary survey in which the method of IFS was used to integrate motivating questions into the lecture presentations in order to increase the students' involvement. Instant Feedback System (IFS) enables the educators to improve their own teaching by getting instant and real-time feedback about how clear the lesson for the students is; it also advances the students' participation and active involvement that improves the understanding of the learned materials. Our long term objectives are to conduct a series of studies to explore both technological and didactic aspects of integrating the IFS system into engineering education. As a first step in our long journey, we designed a new academic course of analog electronics with motivating questions embedded. A ten minute micro exam was conducted every three weeks, during the lesson. The students expressed opinions like:" my recommendation is to keep teaching this way. I believe in active learning during the lectures, it motivates me to come and participate in the lectures." And: "It drives the students to participate in all the lectures of the course. The motivating questions and the micro exams are an efficient tool to bring the students into the lectures." Half of the students chose to participate in one micro exam at least while the other half did not; the academic achievements of the motivated group showed a 26 points advantage in comparison to the other group. The lecturer's conclusions and his perceptions are described in this paper as well