Spectroscopy of broad absorption line quasars at 3≲z≲53\lesssim z \lesssim 5 -- I: evidence for quasar winds shaping broad/narrow emission line regions

We present an observational study of 22 broad absorption line quasars (BAL QSOs) at $3\lesssim z \lesssim5$ based on optical/near-IR spectroscopy, aiming to investigate quasar winds and their effects. The near-IR spectroscopy covers the \hb\ and/or \mgii\ broad emission lines (BELs) for these quasars, allowing us to estimate their central black hole (BH) masses in a robust way. We found that our BAL QSOs on average do not have a higher Eddington ratio than that from non-BAL QSOs matched in redshift and/or luminosity. In a subset consisting of seven strong BAL QSOs possessing sub-relativistic BAL outflows, we see the prevalence of large \civ-BEL blueshift ($\sim$3100 km s$^{-1}$) and weak \oiii\ emission (particularly the narrow \oiii$\lambda$5007 component), indicative of nuclear outflows affecting the narrow emission-line (NEL) regions. In another subset consisting of thirteen BAL QSOs having simultaneous observations of \mgii\ and \hb, we found a strong correlation between 3000~\AA\ and 5000~\AA\ monochromatic luminosity, consistent with that from non-BAL QSOs matched in redshift and luminosity; however, there is no correlation between \mgii\ and \hb\ in FWHM, likely due to nuclear outflows influencing the BEL regions. Our spectroscopic investigations offer strong evidence that the presence of nuclear outflows plays an important role in shaping the BEL/NEL regions of these quasars and possibly, regulating the growth of central supermassive black holes (SMBHs). We propose that BEL blueshift and BAL could be different manifestations of the same outflow system viewed at different sightlines and/or phases.Comment: 13 pages, 10 figures. Accepted for publication in Ap

Empirical likelihood-based portmanteau tests for autoregressive moving average models with possible infinite variance innovation

It is an important task in the literature to check whether a fitted autoregressive moving average (ARMA) model is adequate, while the currently used tests may suffer from the size distortion problem when the underlying autoregressive models have low persistence. To fill this gap, this paper proposes two empirical likelihood-based portmanteau tests. The first one is naive but can serve as a benchmark, and the second is for the case with infinite variance innovations. The asymptotic distributions under the null hypothesis are derived under mild moment conditions, and their usefulness is demonstrated by simulation experiments and two real data examples.Comment: 23 pages, 2 figure

Strand Spaces with Choice via a Process Algebra Semantics

Roles in cryptographic protocols do not always have a linear execution, but may include choice points causing the protocol to continue along different paths. In this paper we address the problem of representing choice in the strand space model of cryptographic protocols, particularly as it is used in the Maude-NPA cryptographic protocol analysis tool. To achieve this goal, we develop and give formal semantics to a process algebra for cryptographic protocols that supports a rich taxonomy of choice primitives for composing strand spaces. In our taxonomy, deterministic and non-deterministic choices are broken down further. Non-deterministic choice can be either explicit, i.e., one of two paths is chosen, or implicit, i.e. the value of a variable is chosen non-deterministically. Likewise, deterministic choice can be either an (explicit) if-then-else choice, i.e. one path is chosen if a predicate is satisfied, while the other is chosen if it is not, or implicit deterministic choice, i.e. execution continues only if a certain pattern is matched. We have identified a class of choices which includes finite branching and some cases of infinite branching, which we address in this paper. Our main theoretical results are two bisimulation results: one proving that the formal semantics of our process algebra is bisimilar to the forwards execution semantics of its associated strands, and another showing that it is also bisimilar with respect to the symbolic backwards semantics of the strands such as that supported by Maude-NPA. At the practical level, we present a prototype implementation of our process algebra in Maude-NPA, illustrate its expressive power and naturalness with various examples, and show how it can be effectively used in formal analysis.Partially supported by NSF grant CNS-131910Partially supported by the EU (FEDER) and the Spanish MINECO under grants TIN 2015-69175-C4-1-R and TIN 2013-45732-C4-1-PParitally supported by Generalitat Valenciana under grant PROME- TEOII/2015/013.Ope

A Longitudinal Examination of Children's Emotion Regulation Problems, Negative Parenting Behaviors, and the Development of Internalizing Behavior Problems.

Internalizing problems in preschool have been found to predict later anxiety and depressive disorders, and outcomes may vary according to children’s gender. Preschool children’s transitions to school pose additional risks, as this developmental period is associated with increased social and cognitive demands. Despite the significance of this age group and the long-term implications associated with early internalizing symptoms, most studies have focused on early behavior problems; relatively few have examined early precursors of internalizing disorders. One potential risk factor, particularly during the preschool-to-school age transition, is emotion dysregulation. Specifically, emotion overregulation, or excessive control of emotions, is ill-defined in current literature but may be associated with later internalizing outcomes. Therefore, in the present study, operational definitions of emotion overregulation were examined and clarified. Structural equation modeling analyses were also conducted to investigate both concurrent and longitudinal relationships between overregulation, negative parenting, and internalizing outcome variables. The potential roles of social context and gender in relationships with children’s adjustment were also explored. Participants were 235 children (113 girls) at elevated risk for behavior problems. Children’s emotion dysregulation was assessed using a multi-method approach: 1) laboratory-based behavioral task; 2) mothers’ reports of children’s emotion overregulation-related temperament; and 3) teachers’ reports of children’s emotion dysregulated behavior. Negative parenting behaviors were assessed via maternal parenting questionnaires. Mothers and teachers reported on child internalizing outcomes at ages 3, 6, and 10 years. Our analysis revealed several interesting pathways between predictor variables and internalizing outcomes. In particular, several emotion overregulation variables predicted internalizing behaviors concurrently and longitudinally, and negative parenting predicted internalizing behaviors across time. Shy temperament, negative parenting, and internalizing behaviors were also stable from preschool to kindergarten, and prediction models also suggested temporal stability of these variables from preschool to late school-age. As expected, some differences between mother- and teacher-reported outcomes were found, suggesting the importance of examining multiple contexts. Although gender was not a significant moderator in the proposed model relationships, unique gender-related findings were revealed. Results are discussed with respect to the value of multi-contextual, multi-level analyses of children’s early emotion regulation abilities and parenting behaviors for prevention of internalizing behavior problems.Ph.D.PsychologyUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/86445/1/ckfan_1.pd

Managing scientific data with named data networking

Many scientific domains, such as climate science and High Energy Physics (HEP), have data management requirements that are not well supported by the IP network architecture. Named Data Networking (NDN) is a new network architecture whose service model is better aligned with the needs of data-oriented applications. NDN provides features such as best-location retrieval, caching, load sharing, and transparent failover that would otherwise be painstakingly (re-)implemented by each application using point-to-point semantics in an IP network. We present the first scientific data management application designed and implemented on top of NDN. We use this application to manage climate and HEP data over a dedicated, high-performance, testbed. Our application has two main components: a UI for dataset discovery queries and a federation of synchronized name catalogs. We show how NDN primitives can be used to implement common data management operations such as publishing, search, efficient retrieval, and publication access control

Reinforcement or Compensation?:Parental Responses to Children’s Revealed Human Capital Levels in Ethiopia

A small but increasing body of literature finds that parents invest in their children unequally. However, the evidence is contradictory, and providing convincing causal evidence of the effect of child ability on parental investment in a low-income context is challenging. This paper examines how parents respond to the differing abilities of primary school-age Ethiopian siblings, using rainfall shocks during the critical developmental period between pregnancy and the first three years of a child’s life to isolate exogenous variation in child ability within the household, observed at a later stage than birth. The results show that on average parents attempt to compensate disadvantaged children through increased cognitive investment. The effect is significant, but small in magnitude: parents provide about 3.9% of a standard deviation more in educational fees to the lower-ability child in the observed pair. We provide suggestive evidence that families with educated mothers, smaller household size, and higher wealth compensate with greater cognitive resources for a lower ability child