Variance of the bivariate density estimator for left truncated right censored data

Cataloged from PDF version of article.In this study the variance of the bivariate kernel density estimators for the left truncated and right censored (LTRC) observations are considered. In LTRC models, the complete observation of the variable Y is prevented by the truncating variable T and the censoring variable C. Consequently, one observes the i.i.d, samples from the triplets (T,Z,delta) only if T less than or equal to Z, Z=min(Y, C) and delta is one if Z=Y and zero otherwise. Gurler and Prewitt (1997, submitted for publication) consider the estimation of the bivariate density function via nonparametric kernel methods and establish an i.i.d. representation of their estimators. Asymptotic variance of the i.i.d, part of their representation is developed in this paper. Application of the results are also discussed for the data-driven and the least-squares cross validation bandwidth choice procedures. (C) 1999 published by Elsevier Science B.V. All rights reserved

Phase I Cultural Resources Investigations at Justiceburg Resevoir on the Double Mountain Fork of the Brazos River, Garza and Kent Counties, Texas Volume II

The prehistoric site descriptions are divided into three sections: Garza County, Kent County, and Isolated Finds. All sites are described fully in a telegraphic format in order to conserve space. The descriptions are organized by county in alphabetical order and in numerical order of site within each county. Information for each site 1s organized into six headings: location, description, features, cultural materials observed/collected, shovel test data, and assessment/recommendations. The determination of the percentage of the site remaining intact is based on in-field observations of the postulated original areal extent of the site versus what is still potentially intact. Assessments are based on each site\u27s individual merits and are stated in terms of eligibility for listing on the National Register of Historic Places. These assessments were made by the Project Archeologist and the Principal Investigator based on a site-by-site review. Two categories of eligibility include: potentially eligible (sites with excellent to unknown research potential) , and not eligible (sites with little or no further research potential). Research potential is derived from each site I s potential to contribute to the resolution of the questions posed in the Research Design (Chapter 5). While most of the research potential categories are reasonably clear, the unknown category should be more fully explained. Sites with unknown potential are those that are buried, lack exposed features, and failed to yield temporally or functionally diagnostic materials. The unknownII designation refers to the inability (based on extant data) to specify which research questions a site may appropriately address rather than a lack of any research potential. Assessments also may refer to exotics. This term is used to identify materials or artifacts that were imported into the local area. Included are such items as obsidian, Alibates agate, Tecovas jasper, and nonlocal ceramics. Recommendations are provided on the basis of each site\u27s assessment. These do not consider the suggested sampling strategy described in Chapter 13, Recommendations/Treatment Plan. Isolated Finds were thoroughly documented in the field and were assigned trinomial site numbers to facilitate record Jceeping; however, they are not felt to be worthy of extended descriptions for reporting purposes. Therefore, this category of sites is treated in highly abbreviated form in a separate section following the site descriptions. Information provided for Isolated Finds includes: site number, location, landform, elevation, area, description, and material type. Isolated finds are defined as any single surface artifact or feature with no associated materials or features, or surface sites with a density of cultural materials less than one item in 20 rna. These finds generally are highly disturbed, redeposited, or lack intact context. No shovel testing was done at Isolated Finds, except at sites 41GR411, 41GR482, 41GRS19, 41GRS32, 41KT46, and 41KT71, where all tests excavated were negative. Only three of these Isolated Finds are dated. These sites are considered to retain little interpretive value beyond the survey level, and none require further work. Because of this, Isolated Finds are not considered eligible for listing on the National Register of Historic Places. Finally, abbreviations are used throughout the site descriptions. Those referring to roads, distances, elevations, and cardinal directions are self-explanatory. However, two others require explanation. GRC refers to Grand River Consultants, Inc., a firm located in Grand River, Colorado, which performed limited archeological survey at Justiceburg in 1982. NRHP refers to the National Register of Historic Places; this phrase is abbreviated to save space since it must be used in the assessments of each individual site

The D0 Run IIb Luminosity Measurement

An assessment of the recorded integrated luminosity is presented for data collected with the D0 detector at the Fermilab Tevatron Collider from June 2006 to September 2011 (Run IIb). In addition, a measurement of the effective cross section for inelastic interactions, also referred to as the luminosity constant, is reported. This measurement incorporates new features that lead to a substantial improvement in the precision of the result. A luminosity constant of \sigma_{LM} = 48.3\pm1.9\pm0.6 mb is obtained, where the first uncertainty is due to the accuracy of the inelastic cross section used by both CDF and D0, and the second uncertainty is due to D0 sources. The recorded luminosity for the highest E_T jet trigger is L_rec = 9.2 \pm 0.4 fb^{-1}, with a relative uncertainty of 4.3%.Comment: 20 pages, 23 figure

Project LAUNCH: System Transformation Evaluation Final Report

This final report presents the evaluation of Missouri’s Project LAUNCH (Linking Actions for Unmet Needs in Children’s Health). Project LAUNCH was a 5 year federal initiative funded by the Substance Abuse and Mental Health Services Administration (SAMHSA). The initiative promoted health and well-being for children from birth to age 8 by creating a more integrated early childhood service system throughout Missouri.https://openscholarship.wustl.edu/cphss/1103/thumbnail.jp

COP21 climate negotiators' responses to climate model forecasts

Policymakers involved in climate change negotiations are key users of climate science. It is therefore vital to understand how to communicate scientific information most effectively to this group. We tested how a unique sample of policymakers and negotiators at the Paris COP21 conference update their beliefs on year 2100 global mean temperature increases in response to a statistical summary of climate models' forecasts. We randomized the way information was provided across participants using three different formats similar to those used in Intergovernmental Panel on Climate Change reports. In spite of having received all available relevant scientific information, policymakers adopted such information very conservatively, assigning it less weight than their own prior beliefs. However, providing individual model estimates in addition to the statistical range was more effective in mitigating such inertia. The experiment was repeated with a population of European MBA students who, despite starting from similar priors, reported conditional probabilities closer to the provided models' forecasts than policymakers. There was also no effect of presentation format in the MBA sample. These results highlight the importance of testing visualization tools directly on the population of interest

Superhard Phases of Simple Substances and Binary Compounds of the B-C-N-O System: from Diamond to the Latest Results (a Review)

The basic known and hypothetic one- and two-element phases of the B-C-N-O system (both superhard phases having diamond and boron structures and precursors to synthesize them) are described. The attention has been given to the structure, basic mechanical properties, and methods to identify and characterize the materials. For some phases that have been recently described in the literature the synthesis conditions at high pressures and temperatures are indicated.Comment: Review on superhard B-C-N-O phase

Measurement of Leptonic Asymmetries and Top Quark Polarization in ttbar Production

We present measurements of lepton (l) angular distributions in ttbar -> W+ b W- b -> l+ nu b l- nubar bbar decays produced in ppbar collisions at a center-of-mass energy of sqrt(s)=1.96TeV, where l is an electron or muon. Using data corresponding to an integrated luminosity of 5.4fb^-1, collected with the D0 detector at the Fermilab Collider, we find that the angular distributions of l- relative to anti-protons and l+ relative to protons are in agreement with each other. Combining the two distributions and correcting for detector acceptance we obtain the forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat) +- 1.3(syst))%, compared to the standard model prediction of A^l_FB (predicted) = (4.7 +- 0.1)%. This result is further combined with the measurement based on the analysis of the l+jets final state to obtain A^l_FB = (11.8 +- 3.2)%. Furthermore, we present a first study of the top-quark polarization.Comment: submitted versio