Ranking Up by Moving Out: The Effect of the Texas Top 10% Plan on Property Values

Texas engaged in a large-scale policy experiment when it instituted the Top 10% Plan. This policy guarantees automatic admission to their state university of choice for all high school seniors who graduate in the top decile of their high school class. We find evidence that households reacted strategically to this policy by moving to neighborhoods with lower-performing schools, increasing both property values and the number of housing units in those areas. These effects are concentrated among schools that were very low-performing before the change in policy; property values and the number of housing units did not change discontinuously for previously high-performing school districts. We also find evidence that these strategic reactions were influenced by the number of local schooling options available: areas that had fewer school choices showed no reaction to the Top 10% Plan.property values, college choice, affirmative action, Top 10% Plan

Instanton-like Excitations in 2D Fermionic Field Theory

New non-perturbatives excitations in the massless Thirring and Schwinger models are discussed.Comment: Revtex, 9pp, to be published in New Trends in Theoretical Physic

Learning Theoretical Concepts through Community Problem Solving: Service-Learning in Flight Safety Courses

Critics of higher education often criticize the chasm separating esoteric academic theory from the pragmatic knowledge required of students after graduation. Service-learning is presented as a catalyst for intrinsically motivating students to master course concepts. In service-learning, students collaborate with each other and with external stakeholders to fuse classroom theory with practical application in order to address real-world problems. Typological and historical overviews of service-learning are provided with special emphasis on how the systemic incorporation of service-learning throughout a degree program may increase student persistence by harmonizing academic processes with generational values. The use of service-learning in flight safety courses at Embry-Riddle Aeronautical University has not only improved safety at the campus and in the surrounding aviation community, it has enhanced the learning of technical concepts in students while greatly improving their soft skills

Organizational Acculturation JetBlue Airways through Values-Framed Instructional Design

New initiatives across the entire spectrum of academic education are attempting to develop values-based curricula that teach ethical decision making. Can a similar process be used to inculcate organizational culture in a corporate workforce? Embry-Riddle Aeronautical University is exploring the use of values-framed instructional design (VFID), where traditional course contents are structured around organizational core values in order to explicitly and implicitly acculturate corporate workers. The method is currently being used to train instructor pilots at JetBlue Airways as a means of scaling organizational culture in step with ongoing growth. In order to determine the potential role for VFID in future corporate education programs, methodologies must be developed to measure the effectiveness of values based instruction as an acculturation tool and to assess its concomitant impact on the financial performance of an organization

Transforming triangulations on non planar-surfaces

We consider whether any two triangulations of a polygon or a point set on a non-planar surface with a given metric can be transformed into each other by a sequence of edge flips. The answer is negative in general with some remarkable exceptions, such as polygons on the cylinder, and on the flat torus, and certain configurations of points on the cylinder.Comment: 19 pages, 17 figures. This version has been accepted in the SIAM Journal on Discrete Mathematics. Keywords: Graph of triangulations, triangulations on surfaces, triangulations of polygons, edge fli

Lagged and instantaneous dynamical influences related to brain structural connectivity

Contemporary neuroimaging methods can shed light on the basis of human neural and cognitive specializations, with important implications for neuroscience and medicine. Different MRI acquisitions provide different brain networks at the macroscale; whilst diffusion-weighted MRI (dMRI) provides a structural connectivity (SC) coincident with the bundles of parallel fibers between brain areas, functional MRI (fMRI) accounts for the variations in the blood-oxygenation-level-dependent T2* signal, providing functional connectivity (FC).Understanding the precise relation between FC and SC, that is, between brain dynamics and structure, is still a challenge for neuroscience. To investigate this problem, we acquired data at rest and built the corresponding SC (with matrix elements corresponding to the fiber number between brain areas) to be compared with FC connectivity matrices obtained by 3 different methods: directed dependencies by an exploratory version of structural equation modeling (eSEM), linear correlations (C) and partial correlations (PC). We also considered the possibility of using lagged correlations in time series; so, we compared a lagged version of eSEM and Granger causality (GC). Our results were two-fold: firstly, eSEM performance in correlating with SC was comparable to those obtained from C and PC, but eSEM (not C nor PC) provides information about directionality of the functional interactions. Second, interactions on a time scale much smaller than the sampling time, captured by instantaneous connectivity methods, are much more related to SC than slow directed influences captured by the lagged analysis. Indeed the performance in correlating with SC was much worse for GC and for the lagged version of eSEM. We expect these results to supply further insights to the interplay between SC and functional patterns, an important issue in the study of brain physiology and function.Comment: Accepted and published in Frontiers in Psychology in its current form. 27 pages, 1 table, 5 figures, 2 suppl. figure

‘Do U txt?’ – Using ‘txting’ to learn maternal languages: a Portuguese case study

Analysing the influence of new technologies/media (e.g., mobile phones, chats, instant messaging services) on the use and learning of maternal languages basic rules is the goal of this investigation, involving teachers and students (10th, 11th and 12th grade pupils, aged between 16 and 21) at the Escola Secundária de Silves – ESS (Algarve/Portugal), and extended to include at the Irish School of St. Tiernan’s Community (Dublin/Ireland). The use of txting, commonly pointed out as being responsible for the destruction of correct knowledge/mastery of maternal language rules in younger people is, however, in our opinion, one more factor proving the constant adaptability/transformation of languages, revealing the user’s high creativity, ability to synthesise and to introduce – in txting itself – different language skill levels. Exercises using txting were developed/applied at the ESS, proving to be motivational (both for students and teachers) and efficient in transmitting Portuguese language rules

Submillimetre dust polarisation and opacity in the HD163296 protoplanetary ring system

We present ALMA images of the sub-mm continuum polarisation and spectral index of the protoplanetary ringed disk HD163296. The polarisation fraction at 870{\mu}m is measured to be ~0.9% in the central core and generally increases with radius along the disk major axis. It peaks in the gaps between the dust rings, and the largest value (~4%) is found between rings 1 and 2. The polarisation vectors are aligned with the disk minor axis in the central core, but become more azimuthal in the gaps, twisting by up to +/-9degrees in the gap between rings 1 and 2. These general characteristics are consistent with a model of self-scattered radiation in the ringed structure, without requiring an additional dust alignment mechanism. The 870/1300{\mu}m dust spectral index exhibits minima in the centre and the inner rings, suggesting these regions have high optical depths. However, further refinement of the dust or the disk model at higher resolution is needed to reproduce simultaneously the observed degree of polarisation and the low spectral index.Comment: 5 pages +2 pages supplemental data. v2 - revised figures and final values; conclusions unchange