Action principles for higher and fractional spin gravities

We review various off-shell formulations for interacting higher-spin systems in dimensions 3 and 4. Associated with higher-spin systems in spacetime dimension 4 is a Chern-Simons action for a superconnection taking its values in a direct product of an infinite-dimensional algebra of oscillators and a Frobenius algebra. A crucial ingredient of the model is that it elevates the rigid closed and central two-form of Vasiliev's theory to a dynamical 2-form and doubles the higher-spin algebra, thereby considerably reducing the number of possible higher spin invariants and giving a nonzero effective functional on-shell. The two action principles we give for higher-spin systems in 3D are based on Chern-Simons and BF models. In the first case, the theory we give unifies higher-spin gauge fields with fractional-spin fields and an internal sector. In particular, Newton's constant is related to the coupling constant of the internal sector. In the second case, the BF action we review gives the fully nonlinear Prokushkin-Vasiliev, bosonic equations for matter-coupled higher spins in 3D. We present the truncation to a single, real matter field relevant in the Gaberdiel-Gopakumar holographic duality. The link between the various actions we present is the fact that they all borrow ingredients from Topological Field Theory. It has bee conjectured that there is an underlying and unifying 2-dimensional first-quantised description of the previous higher-spin models in 3D and 4D, in the form of a Cattaneo-Felder-like topological action containing fermionic fields.Comment: 41+1 pages. References added and reorganized, corrected typos, last paragraph of section 2 re-written. Contribution to the proceedings of the International Workshop on Higher Spin Gauge Theories (4-6 November 2015, Singapore

An Analysis of Mathematics Achievement Disparities Between Black and White Students and Socioeconomically Disadvantaged and Advantaged Students Across Content Strands by Elementary and Middle School Level in a Diverse Virginia School District

Student achievement gaps between Black and White students, and socioeconomically disadvantaged and advantaged students, have been observed and formally documented since the National Assessment of Educational Progress (NAEP) began in the 1970s. In particular, the mathematics achievement gap between these historically disadvantaged populations has been a phenomenon that, in spite of improvements, has nevertheless remained persistent for decades. This study sought to identify and derive additional information about the mathematics achievement gap between Black students and White students, and socioeconomically disadvantaged and advantaged students, by elementary and middle school level in a Virginia school district over three consecutive school years. Overall student performance on the Virginia Mathematics Standards of Learning (SOL) assessment was examined and achievement gaps were reported. In addition to overall mathematics achievement, this study also sought to detect specific mathematic conceptual areas in which Black and White students, and socioeconomically disadvantaged and advantaged students, were significantly disparate. Factorial Analysis of Covariance (ANCOVA) and Factorial Multivariate Analysis of Covariance (MANCOVA) were used to identify statistically significant differences between the subgroups in assessment scores reflecting overall mathematics achievement, and student achievement in five conceptual “content strands.” Interactions between student race, socioeconomic status, and school level were also examined. Effect sizes were calculated to indicate any practical significance corresponding to statistical significance noted. For overall mathematics performance, results indicated the continued presence of an achievement gap between Black and White students, and socioeconomically disadvantaged and advantaged students, for each year examined. Interaction was noted between race and socioeconomic status, and race and school level. For mathematics performance along the content strands, results indicated the presence of an achievement gap between Black and White students, and socioeconomically disadvantaged and advantaged students, in every conceptual area for each year analyzed. Interaction was indicated between race and socioeconomic status in all but one content strand during one school year. Consistent interaction was also observed between race and school level in two content strands. No significant effect size was indicated for overall or strand-based mathematics achievement differences, demonstrating limited practical significance. Implications for practice, limitations, and suggestions for future research are discussed

TV in the Age of the Internet: Information Quality of Science Fiction TV Fansites

Thesis (Ph.D.) - Indiana University, Information Science, 2011Communally created Web 2.0 content on the Internet has begun to compete with information provided by traditional gatekeeper institutions, such as academic journals, medical professionals, and large corporations. On the one hand, such gatekeepers need to understand the nature of this competition, as well as to try to ensure that the general public are not endangered by poor quality information. On the other hand, advocates of free and universal access to basic social services have argued that communal efforts can provide as good or better-quality versions of commonly needed resources. This dissertation arises from these needs to understand the nature and quality of information being produced on such websites. Website-oriented information quality (IQ) literature spans at least 15 different academic fields, a survey of which identified two types of IQ: perceptual and artifactual fitness-related, and representational accuracy and completeness-related. The current project studied websites in terms of all of these, except perceptual fitness. This study may be the only of its kind to have targeted fansites: websites made by fans of a mass media franchise. Despite the Internet's becoming a primary means by which millions of people consume and co-produce their entertainment, little academic attention has been paid to the IQ of sites about the mass media. For this study, the four central non-studio-affiliated sites about a highly popular and fan-engaging science fiction television franchise, Stargate, were chosen, and their IQ examined across sites having different sizes as well as editorial and business models. As exhaustive of samples as possible were collected from each site. Based on 21 relevant variables from the IQ literature, four qualitative and 17 exploratory statistical analyses were conducted. Key findings include: five possibly new IQ criteria; smaller sites concerned more with pleasing connoisseuring fans than the general public; larger sites being targeted towards older users; professional editors serving their own interests more than users'; wikis' greater user freedom attracting more invested and balanced writers; for-profit sites being more imposing upon, and less protecting of, users than non-profit sites; and the emergence of common writing styles, themes, data fields, advertisement types, linking strategies, and page types

MMPI-2-RF HIGHER ORDER PATHOLOGY OF PHYSICIANS IN DISTRESS

Modern theories of psychopathology incorporate a higher-order approach to conceptualization (e.g., Krueger & Tackett, 2003). These theories are often characterized as having internalizing, externalizing, and thought disorder content as critical elements. This higher order approach has recently been incorporated into the MMPI-2-Restructured Form (MMPI-2-RF; Tellegen & Ben-Porath, 2008/2011). Using individual higher-order content scales and instrument wide interpretive schemas, a hierarchical emphasis on interpretation is part of a critical effort to bring the MMPI in line with current conceptualizations of psychopathology. However, there is a paucity of research available about the utility of scale wide interpretive frameworks, despite their use being recommended for interpretation. Using a population of physicians in distress, this study evaluated the potential portability and generalization of the MMPI-2-RF’s interpretive framework into a novel population through structural analysis using several analytic methods (i.e., Confirmatory Factor Analysis, Exploratory Structural Equation Modeling, and Exploratory Factor Analysis). Each of these techniques included different assumptions about scale interrelatedness and broader relationships and, when taken together, provides a comprehensive evaluation of the feasibility of the higher-order themes as an interpretive framework for the MMPI-2-RF in a population of physicians in distress. Although no model was found as entirely appropriate to the proposed framework noted by the authors of the MMPI-2-RF, the three critical areas of psychopathology did emerge. Issues with incorporating these higher order models are related to the need for nested factors, specifically relating to externalization content of anger, hostility, and aggression. Beyond guidance on general interpretability of the higher order themes, specific guidance is offered for use of the MMPI-2-RF in a population of physicians in distress

TTA school-based research consortium initiative, the evaluation, final report

This is the final report of the evaluation of th School-Based Research Consortium Initiative which ran in England from 1998 to 2001. The initiative was sponsored via a public/private partnership between the Teacher Training Agency (TTA), a UK Government agency, and the Centre for British Teachers (CfBT), a private not-for-profit company. The aim of the initiative was to create local infrastructures of support and action for teachers to engage ‘in and with’ research. Those infrastructures were made up of consortia, consisting in each case of a small number of schools together with a university department of education and at least one local education authority (LEA). Over the three years that it ran, the initiative spawned a considerable range and volume of research activities, including peer observation of teaching, peer review of videos of teaching, interview-based study, surveys measuring such things as rewards and sanctions in the classroom. In addition to well-developed teacher-university collaborations and some joint work with local education authorities, there were many examples of teacher-teacher collaboration (some of it between different schools), and also times when teachers and pupils worked together to devise, carry out or interpret research activity. In practice, the initiative created an environment in which it was possible to develop new research relationships across a range of partners, rather than merely transfer the locus of research to schools. Three aspects of teacher experience of the initiative are important to highlight. The first was the overwhelming testimony of teachers that the value of the initiative for them was the rediscovery of their professional confidence in a climate of low trust accountability, characterised by constant monitoring, target setting and bureaucratic demands. The second was the growth of familiarity with research practices that teachers gained through working collaboratively with their peers, with pupils, and with colleagues from the university. The third was how the process of research itself was necessarily situated in teachers’ own practices

Fast Internet-Wide Scanning: A New Security Perspective

Techniques like passive observation and random sampling let researchers understand many aspects of Internet day-to-day operation, yet these methodologies often focus on popular services or a small demographic of users, rather than providing a comprehensive view of the devices and services that constitute the Internet. As the diversity of devices and the role they play in critical infrastructure increases, so does understanding the dynamics of and securing these hosts. This dissertation shows how fast Internet-wide scanning provides a near-global perspective of edge hosts that enables researchers to uncover security weaknesses that only emerge at scale. First, I show that it is possible to efficiently scan the IPv4 address space. ZMap: a network scanner specifically architected for large-scale research studies can survey the entire IPv4 address space from a single machine in under an hour at 97% of the theoretical maximum speed of gigabit Ethernet with an estimated 98% coverage of publicly available hosts. Building on ZMap, I introduce Censys, a public service that maintains up-to-date and legacy snapshots of the hosts and services running across the public IPv4 address space. Censys enables researchers to efficiently ask a range of security questions. Next, I present four case studies that highlight how Internet-wide scanning can identify new classes of weaknesses that only emerge at scale, uncover unexpected attacks, shed light on previously opaque distributed systems on the Internet, and understand the impact of consequential vulnerabilities. Finally, I explore how in- creased contention over IPv4 addresses introduces new challenges for performing large-scale empirical studies. I conclude with suggested directions that the re- search community needs to consider to retain the degree of visibility that Internet-wide scanning currently provides.PHDComputer Science & EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttps://deepblue.lib.umich.edu/bitstream/2027.42/138660/1/zakir_1.pd

HI-AWARE consortium final technical report 2018

Funded by the UK Government’s Department for International Development and the International Development Research Centre, Canada.How to develop timely adaptation measures and approaches to respond to rising temperatures, seasonal shifts in glacier and snowmelt induced runoff, and increased frequency of extreme events in the HKH mountains and floodplains in order to improve the resilience of livelihoods of the poorest and most vulnerable women, men and children in the region