Navajo Ethnic Identity and Acculturation: Discovering Connections Between Ethnic Identity, Acculturation, and Psychosocial Outcomes

American Indians are severely disadvantaged and yet known relationships among risk and protective factors and cultural identification are limited. The current study assessed associations among measures of acculturation, ethnic identity, and psychosocial outcomes among Navajo adolescents. Adjustment of Navajo adolescents in the domains of school bonding, social functioning, self-esteem, depression, delinquent behaviors, and substance use was assessed. Navajo adolescents, between the ages of 14 and 18, also completed a self-report questionnaire containing the Revised Multigroup Ethnic Identity Measure, the Orthogonal Cultural Identification Scale, and the Native American Acculturation Scale. Measures of ethnic identity were positively associated with aspects of psychosocial functioning for Navajo adolescents, with stronger predictions of school bonding, self-esteem, and social functioning outcomes emerging for males. The students\u27 sense of affirmation and belonging to their ethnic heritage emerged as the strongest predictor of positive outcomes

Antinucleus Production at RHIC

Light antinuclei may be formed in relativistic heavy ion collisions via final state coalescence of antinucleons. The yields of antinuclei are sensitive to primordial antinucleon production, the volume of the system at kinetic freeze-out, and space-momentum correlations among antinucleons at freeze-out. We report here preliminary STAR results on antideuteron and antihelion production in 130A GeV Au+Au collisions. These results are examined in a coalescence framework to elucidate the space-time structure of the antinucleon source.Comment: 4 pages, 3 figures, talk given at Quark Matter 200

Students Who Experienced Foster Care are on Campus: Are Colleges Ready?

Though most youth in the foster care system aspire to attend college, few have the opportunity to do so. For myriad reasons, including lack of historical representation on college campuses, sub- par Pk-12 education, and postsecondary barriers to admissions, enrollment, and financial aid, most college students who experienced foster care depart college without earning a degree. As the barriers to college for this population of students emerges, postsecondary institutions are pre- paring their campuses for students with unique needs. This qualitative study explores how student affairs professionals in one university system support college students previously in foster care. Professionals and teams of professionals working at six different institutions across the university system participated in interviews that emphasized the ways campuses used resources to meet students’ hierarchy of needs. Based on the results of this research, student affairs professionals support students’ foundational physiological and safety needs in myriad ways. In doing so, student affair professionals add to the motivation necessary for students to move towards belonging, esteem, and actualization

Global-scale proxy system modeling of oxygen isotopes in lacustrine carbonates: 2 new insights from isotope-enabled-model proxy-data comparison

Proxy System Modelling (PSM) is now recognised as a crucial step in comparing climate model output with proxy records of past environmental change. PSMs filter the climate signal from the model, or from meteorological data, based on the physical, chemical and biological processes of the archive and proxy system under investigation. Here we use a PSM of lake carbonate δ18O to forward model pseudoproxy time-series for every terrestrial grid square in the SPEEDY-IER isotope enabled General Circulation Model (GCM), and compare the results with 31 records of lake δ18O data from the Americas in the NOAA Paleoclimate Database. The model-data comparison shows general patterns of spatial variability in the lake δ18O data are replicated by the combination of SPEEDY-IER and the PSM, with differences largely explained by known biases in the models. The results suggest improved spatial resolution/coverage of climate models and proxy data, respectively, is required for improved data-model comparison, as are increased numbers of higher temporal resolution proxy time series (sub decadal or better) and longer GCM runs. We prove the concept of data-model comparison using isotope enabled GCMs and lake isotope PSMs and outline potential avenues for further work

Can a strongly interacting Higgs boson rescue SU(5)?

Renormalization group analyses show that the three running gauge coupling constants of the Standard Model do not become equal at any energy scale. These analyses have not included any effects of the Higgs boson's self-interaction. In this paper, I examine whether these effects can modify this conclusion.Comment: 8 pages (plus 4 postscript figures

Halo detection via large-scale Bayesian inference

We present a proof-of-concept of a novel and fully Bayesian methodology designed to detect halos of different masses in cosmological observations subject to noise and systematic uncertainties. Our methodology combines the previously published Bayesian large-scale structure inference algorithm, HADES, and a Bayesian chain rule (the Blackwell-Rao Estimator), which we use to connect the inferred density field to the properties of dark matter halos. To demonstrate the capability of our approach we construct a realistic galaxy mock catalogue emulating the wide-area 6-degree Field Galaxy Survey, which has a median redshift of approximately 0.05. Application of HADES to the catalogue provides us with accurately inferred three-dimensional density fields and corresponding quantification of uncertainties inherent to any cosmological observation. We then use a cosmological simulation to relate the amplitude of the density field to the probability of detecting a halo with mass above a specified threshold. With this information we can sum over the HADES density field realisations to construct maps of detection probabilities and demonstrate the validity of this approach within our mock scenario. We find that the probability of successful of detection of halos in the mock catalogue increases as a function of the signal-to-noise of the local galaxy observations. Our proposed methodology can easily be extended to account for more complex scientific questions and is a promising novel tool to analyse the cosmic large-scale structure in observations.Comment: 17 pages, 13 figures. Accepted for publication in MNRAS following moderate correction

Maximum Area Axis-Aligned Square Packings

Given a point set S={s_1,...s_n} in the unit square U=[0,1]^2, an anchored square packing is a set of n interior-disjoint empty squares in U such that s_i is a corner of the ith square. The reach R(S) of S is the set of points that may be covered by such a packing, that is, the union of all empty squares anchored at points in S. It is shown that area(R(S))>= 1/2 for every finite set S subset U, and this bound is the best possible. The region R(S) can be computed in O(n log n) time. Finally, we prove that finding a maximum area anchored square packing is NP-complete. This is the first hardness proof for a geometric packing problem where the size of geometric objects in the packing is unrestricted