General triple charged black ring solution in supergravity

We present the general black ring solution in $U(1)^{3}$ supergravity in 5 dimensions with three independent dipole and electric charges. This immediately gives the general black ring solution in the minimal 5D supergravity as well.Comment: 10 page

What Works in Work-First Welfare: Designing and Managing Employment Programs in New York City

This book is a case study of how New York City\u27s welfare-to-work programs were managed and implemented in the mid 2000s. Feldman also analyzes the unique characteristics that differentiate it from other programs in place across the country.https://research.upjohn.org/up_press/1224/thumbnail.jp

Approximate resilience, monotonicity, and the complexity of agnostic learning

A function $f$ is $d$-resilient if all its Fourier coefficients of degree at most $d$ are zero, i.e., $f$ is uncorrelated with all low-degree parities. We study the notion of $\mathit{approximate}$ $\mathit{resilience}$ of Boolean functions, where we say that $f$ is $\alpha$-approximately $d$-resilient if $f$ is $\alpha$-close to a $[-1,1]$-valued $d$-resilient function in $\ell_1$ distance. We show that approximate resilience essentially characterizes the complexity of agnostic learning of a concept class $C$ over the uniform distribution. Roughly speaking, if all functions in a class $C$ are far from being $d$-resilient then $C$ can be learned agnostically in time $n^{O(d)}$ and conversely, if $C$ contains a function close to being $d$-resilient then agnostic learning of $C$ in the statistical query (SQ) framework of Kearns has complexity of at least $n^{\Omega(d)}$. This characterization is based on the duality between $\ell_1$ approximation by degree-$d$ polynomials and approximate $d$-resilience that we establish. In particular, it implies that $\ell_1$ approximation by low-degree polynomials, known to be sufficient for agnostic learning over product distributions, is in fact necessary. Focusing on monotone Boolean functions, we exhibit the existence of near-optimal $\alpha$-approximately $\widetilde{\Omega}(\alpha\sqrt{n})$-resilient monotone functions for all $\alpha>0$. Prior to our work, it was conceivable even that every monotone function is $\Omega(1)$-far from any $1$-resilient function. Furthermore, we construct simple, explicit monotone functions based on ${\sf Tribes}$ and ${\sf CycleRun}$ that are close to highly resilient functions. Our constructions are based on a fairly general resilience analysis and amplification. These structural results, together with the characterization, imply nearly optimal lower bounds for agnostic learning of monotone juntas

[Review of] Sally M. Miller, ed. The Ethnic Press in the United States: A Historical Analysis and Handbook

This book is first and foremost a much-needed reference text. It fills a scholarly void in media history by presenting the press histories of twenty-eight immigrant groups

Contemplative practice and classical electrodynamics: Discovering electromagnetic phenomena in lived experience through somatic meditation

One of the objectives of the undergraduate physics curriculum is for students to develop an awareness of the connections between formal physical principles and personal experience. However, data from surveys administered to measure changes in students' beliefs about physics shows that awareness of connections between the abstract and the experiential tends to deteriorate, sometimes significantly, following instruction in undergraduate physics courses. Although this phenomenon has been discussed extensively in the literature, and preliminary studies have indicated that addressing students' beliefs about physics with specific teaching practices can have measurable effects, few pedagogical interventions have been designed or implemented to address this particular weakness in undergraduate physics instruction. In this work, we show that a contemplative practice consisting of a somatic meditation followed by a contemplation expands students' awareness of the connections between formal physical principles and personal experience by deliberately drawing their attention to electromagnetic phenomena in their surroundings. In this process, students also naturally recognize interdisciplinary connections between electrodynamic principles and chemical and biological systems. We also find that the contemplative practice inculcates a sense of curiosity and an intrinsic motivation to deepen their understanding of electromagnetic theory, as well as an appreciation for the somatic, affective, and cognitive benefits of a contemplative practice.Comment: Submitted for publication in The Physics Teacher; 15 page

The Changing Structure of the Securities Markets and the Securities Industry: Implications for International Securities Regulation

This article addresses the impact internationalization has had on the world\u27s securities markets with a particular focus on its role in forcing change in the structure of those markets. Part I describes the forces involved in the internationalization process, and analyzes capital movement and other phenomena that demonstrate the extent of internationalization. Next, it reviews the structural changes that securities markets and the securities industry have made in response to the internationalization process. Part II analyzes the measures regulators have taken to address the implications of those developments. Part III discusses the October Market Break and how it illustrates the interdependence and institutionalization of international securities markets. Part IV suggests that the events of last October have or should have changed our perception of the world and discusses the issues regulators will have to address in order to deal with interdependence, volatility and other characteristics of internationalized capital markets. Part V recommends that regulators respond to these issues by adopting a multilateral approach to certain international securities regulation issues

Nocturnal Dexamethasone versus Hydrocortisone for the Treatment of Children with Congenital Adrenal Hyperplasia

Classic congenital adrenal hyperplasia affects approximately 1 in 15,000 children. Current treatment strategies using multiple daily doses of hydrocortisone lead to suboptimal outcomes. We tested the hypothesis that nocturnal administration of dexamethasone will suppress the hypothalamic-pituitary-adrenal axis more effectively than standard hydrocortisone treatment by blocking the inherent diurnal secretion of ACTH. We performed a pilot study of five prepubertal patients comparing CAH control during two 24-hour hospitalizations, one on hydrocortisone and the other on dexamethasone. The patterns of adrenal suppression differed markedly between hydrocortisone and nocturnal dexamethasone, with significant suppression of the morning rise in ACTH, 17-hydroxyprogesterone, and androstenedione while on dexamethasone. On hydrocortisone therapy, there is a marked variation in ACTH and adrenal hormones depending on time of day and timing of hydrocortisone administration. Longer-term studies are needed to investigate the lowest effective dose and potential toxicity of nocturnal dexamethasone to determine its utility as a therapy for CAH