An experimentally robust technique for halo measurement using the IPM at the Fermilab Booster

We propose a model-independent quantity, $L/G$, to characterize non-Gaussian tails in beam profiles observed with the Fermilab Booster Ion Profile Monitor. This quantity can be considered a measure of beam halo in the Booster. We use beam dynamics and detector simulations to demonstrate that $L/G$ is superior to kurtosis as an experimental measurement of beam halo when realistic beam shapes, detector effects and uncertainties are taken into account. We include the rationale and method of calculation for $L/G$ in addition to results of the experimental studies in the Booster where we show that $L/G$ is a useful halo discriminator

Justice Center Research Overview; Vol. 3

An overview of key research findings nationally and in Alaska on the relationships between victims and suspects in sexual assault cases

Quasi-static granular flow of ice mélange

We use Landsat 8 imagery to generate ice mélange velocity fields at Greenland’s three most productive outlet glaciers: Jakobshavn Isbræ, Helheim Glacier, and Kangerdlugssuaq Glacier. Winter velocity fields are generally steady and highly uniform. Summer velocity fields, on the other hand, tend to be much more variable and can be uniform, compressional, or extensional. We rarely observe compressional flow at Jakobshavn Isbræ or extensional flow at Helheim Glacier, while both are observed at Kangerdlugssuaq Glacier. Transverse velocity profiles from all three locations are suggestive of viscoplastic flow, in which deformation occurs primarily in shear zones along the fjord walls. We analyze the transverse profiles in the context of quasi-static flow using continuum rheologies for granular materials and find that the force per unit width that ice mélange exerts on glacier termini increases exponentially with the ice mélange length-to-width ratio and the effective coefficient of friction. Our estimates of ice mélange resistance are consistent with other independent estimates and suggest that ice mélange may be capable of inhibiting iceberg calving events, especially during winter. Moreover, our results provide geophysical-scale support for constitutive relationships for granular materials and suggest a potential avenue for modeling ice mélange dynamics with continuum models.From acknowledgments: Funding for this project was provided by the U.S. National Science Foundation (DMR-1506446 and DMR-1506307). Digital elevation models were provided by the Polar Geospatial Center under the U.S. National Science Foundation (OPP-1043681, OPP-1559691, and OPP-1542736)Ye

Quasi-static granular flow of ice mélange

We use Landsat 8 imagery to generate ice mélange velocity fields at Greenland’s three most productive outlet glaciers: Jakobshavn Isbræ, Helheim Glacier, and Kangerdlugssuaq Glacier. Winter velocity fields are generally steady and highly uniform. Summer velocity fields, on the other hand, tend to be much more variable and can be uniform, compressional, or extensional. We rarely observe compressional flow at Jakobshavn Isbræ or extensional flow at Helheim Glacier, while both are observed at Kangerdlugssuaq Glacier. Transverse velocity profiles from all three locations are suggestive of viscoplastic flow, in which deformation occurs primarily in shear zones along the fjord walls. We analyze the transverse profiles in the context of quasi-static flow using continuum rheologies for granular materials and find that the force per unit width that ice mélange exerts on glacier termini increases exponentially with the ice mélange length-to-width ratio and the effective coefficient of friction. Our estimates of ice mélange resistance are consistent with other independent estimates and suggest that ice mélange may be capable of inhibiting iceberg calving events, especially during winter. Moreover, our results provide geophysical-scale support for constitutive relationships for granular materials and suggest a potential avenue for modeling ice mélange dynamics with continuum models.From acknowledgments: Funding for this project was provided by the U.S. National Science Foundation (DMR-1506446 and DMR-1506307). Digital elevation models were provided by the Polar Geospatial Center under the U.S. National Science Foundation (OPP-1043681, OPP-1559691, and OPP-1542736)Ye

Charm Production in Deep Inelastic Scattering from Threshold to High $Q^{2}

Charm final states in deep inelastic scattering constitute $\sim 25$ of the inclusive cross-section at small $x$ as measured at HERA. These data can reveal important information on the charm and gluon structure of the nucleon if they are interpreted in a consistent perturbative QCD framework which is valid over the entire energy range from threshold to the high energy limit. We describe in detail how this can be carried out order-by-order in PQCD in the generalized \msbar formalism of Collins (generally known as the ACOT approach), and demonstrate the inherent smooth transition from the 3-flavor to the 4-flavor scheme in a complete order $\alpha_s$ calculation, using a Monte Carlo implementation of this formalism. This calculation is accurate to the same order as the conventional NLO $F_2$ calculation in the limit $\frac{Q}{m_c} >> 1$. It includes the resummed large logarithm contributions of the 3-flavor scheme (generally known in this context as the fixed-flavor-number or FFN scheme) to all orders of $\alpha_s\ln(m_c^2/Q^2)$. For the inclusive structure function, comparison with recent HERA data and the existing FFN calculation reveals that the relatively simple order-$\alpha_s$ (NLO) 4-flavor ($m_c \neq 0$) calculation can, in practice, be extended to rather low energy scales, yielding good agreement with data over the full measured $Q^2$ range. The Monte Carlo implementation also allows the calculation of differential distributions with relevant kinematic cuts. Comparisons with available HERA data show qualitative agreement; however, they also indicate the need to extend the calculation to the next order to obtain better description of the differential distributions.Comment: 22 pages (LATEX), 8 figures (EPS); A few clarifying changes made; version published in JHE

Inelastic Photoproduction at HERA: a Second Charmonium Crisis?

The measurement of the inelastic photoproduction of charmonium at HERA seems to have ignited a new charmonium crisis. The (already discredited) color singlet model fits the data for large charmonium energy fraction z, where the NRQCD model qualitatively fails. We here point out that by the straightforward inclusion of color singlet and octet processes in the soft color (color evaporation) scheme, the HERA data can be accommodated for all z. We anticipate that the color singlet model will fail at low z, as it does in hadroproduction.Comment: 10 pages, Revtex, uses epsfig.sty to include 4 postscript figures. Also available from the UW-Madison Phenomenology preprint archives at http://pheno.physics.wisc.edu/pub/preprints/1998/madph-98-1045.ps.Z or at ftp://pheno.physics.wisc.edu/pub/preprints/1998/madph-98-1045.ps.

A model of career training in international contexts

This article describes a model for the training of career practitioners in international contexts. This model uses an "active engagement" approach and has as its foundation the following factors: 1. Competence / Skill Based; 2. Experiential Learning; 3. Strength Challenge; 4. Critical Reflection; 5. Dynamic Interventions and Processes; and 6. Imbedded Learning and Innovation. There also is discussion of other practical training issues.Facultad de Psicologí

Empowering Learners through Habits of Mind and Personalized Pathways: An Ethnographic Study

While teaching using a personalized learning concept, it was discovered that learners did not have the necessary social emotional skills that they needed in order to successfully make decisions for their learning. Throughout researching personalized learning, engagement, self-pacing, and empowered learning three different Habits of Mind, the school district’s social emotional learning program, were identified to teach to a small group of learners in grades three through six to help them better understand what personalized learning is and why they are doing it in order to take ownership of their learning. Therefore this research question was created: How does the explicit teaching of three Habits of Mind change the level of ownership learners take in a personalized learning model? Learners took a four question open ended survey at the beginning of the study, then they were taught three different Habits of Mind over three weeks and then took the exact same survey in order to compare the results. The researcher also completed a journal throughout to include their thoughts and feelings of what was happening in the classroom. The survey showed direct, tangible results of the level of ownership change for the learners but the journaling showed a much greater level of ownership change. Learners went from not making appropriate choices and struggling with personalized learning to choosing choices that fit them well academically and persevering through challenges that come with personalized learning. With even more social emotional instruction, the level of ownership hopefully would continue to improve

Refugee Resettlement and Perceptions of Insecurity: A Comparative Study of The United States and Canada

In the United States and Canada, refugee resettlement has been the subject of extensive scrutiny and political debate, particularly since the November 2015 terrorist attacks carried out by the Islamic State of Iraq and Syria (ISIS) against targets in Paris. While public opinion polls have shown increasingly negative attitudes toward refugees, existing survey questionnaires only provide a limited understanding of what shapes these views. As such, this study focuses on two important factors that influence attitude formation toward refugees, pre-existing levels of knowledge and contact with minority groups. Using a comparative case study approach, this research examines how refugee resettlement influences American and Canadian perceptions of insecurity. While most research on refugee issues is conducted in major gateway cities, the study area for this research focuses on adjacent rural state and province with low immigration rates, now experiencing increased numbers of resettled refugees. This study uses a mixed-methods approach to collect data in two sequential phases of fieldwork in both Montana and Saskatchewan. A community survey is first conducted in both areas, followed by in-depth qualitative interviews with key informants to discuss and gain multiple perspectives on the survey results findings. Unique features of the survey questionnaire include a brief quiz to measure general knowledge about refugee issues and a section designed to determine levels of intergroup contact. Data is also supplemented through an analysis of documents in both study area locations. This new in-depth research on public perceptions offers a clearer picture of what influences positive and negative attitudes toward refugee resettlement and can help government officials better respond to the concerns of their constituents