ScholarWorks@UMassAmherst

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Graduate students: Directions for submissions can be found in this guide. Please email scholarworks@library.umass.edu if you have any questions.

Request forms for campus-only items are functional. If you do not receive a reply to a submitted request, please email scholarworks@library.umass.edu.

Please see our ScholarWorks guide for more information about submitting your work to ScholarWorks.

Featured Items

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UMOP 42: Historical reflections in celebration of the 50th Anniversary of UMass Linguistics

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UMOP 42: Papers in celebration of the 50th Anniversary of UMass Linguistics

Recent Submissions

  • PublicationOpen Access
    Supplemental Data and Code for Geometrically Frustrated Assembly at Finite Temperature: Phase Transitions from Self-Limiting to Bulk States
    (arxiv, 2025-08-29) Hackney, Nicholas; Grason, Gregory
    Geometric frustration is recognized to generate complex morphologies in self-assembling particu- late and molecular systems. In bulk states, frustrated drives structured arrays of topological defects. In the dilute limit, these systems have been shown to form a novel state of self-limiting assembly, in which the equilibrium size of multi-particle domains are finite and well-defined. In this article, we employ Monte Carlo simulations of a recently developed 2D lattice model of geometrically frus- trated assembly [1] to study the phase transitions between the self-limiting and defect bulk phase driven by two distinct mechanisms: (i) increasing concentration and (ii) decreasing temperature or frustration. The first transition is mediated by a concentration-driven percolation transition of self-limiting, worm-like domains into an intermediate heterogeneous network mesophase, which gradually fills in at high concentration to form a quasi-uniform defect bulk state. We find that the percolation threshold is weakly dependent on frustration and shifts to higher concentration as frus- tration is increased, but depends strongly on the ratio of cohesion to elastic stiffness in the model. The second transition takes place between self-limiting assembly at high-temperature/frustration and phase separation into a condensed bulk state at low temperature/frustration. We consider the competing influences that translational and conformational entropy have on the critical tem- perature/frustration and show that the self-limiting phase is stabilized at higher frustrations and temperatures than previously expected. Taken together, this understanding of the transition path- ways from self-limiting to bulk defect phases of frustrated assembly allows us to map the phase behavior of this 2D minimal model over the full range of concentration.
  • PublicationOpen Access
    Price Shocks are Redistribution Shocks: Systemically Significant Prices for Inequality in the United States
    (2025-11-03) Lara Jauregui, Jesus; Weber, Isabella Maria; Nassif Pires, Luiza; Teixeira, Lucas
    This paper develops a novel empirical framework to identify the sectors that are systemically significant for inequality in the United States. We incorporate decile-specific consumption baskets into an input-output price model to simulate how sectoral price shocks affect income distribution as measured by changes in the Gini coefficient. Using the pre-pandemic sectoral price volatility and the price changes from early 2022 as the price shocks for our simulations, we show that a small set of sectors in energy, food and agriculture, healthcare, chemicals and, to a lesser extent, wholesale trade and housing, have a disproportionate capacity to increase inequality when their prices rise. We find a substantial overlap between the sectors that are systemically significant for inflation and those that are significant for inequality. These findings underscore the limits and costs of conventional monetary policy in addressing supply-driven inflation and point to the need for sector-specific policies for price stabilization.
  • PublicationOpen Access
    Virtual Compton Scattering on the Proton Below Pion Threshold
    (2005-09) Bourgeois, Paul S.
    The technique of Virtual Compton Scattering (VCS) has beconve a valuable tool in the study of nucleon structure. In this thesis we describe the use of VCS to measure generalized Polarizabilities (GPs) of the proton. The GPs are fundamental properties of the proton and their precise measurement will set limits on models of nucleon structure.
  • PublicationOpen Access
    Equity for Continuing Stream Faculty
    (2025) Hatch, Christine; Hooper, Jason; Martínez, Elisa; Misra, Joya; Reed, Heather; Springer, Amy
    Across higher education, there is an increasing reliance on faculty members in continuing-stream appointments. We use the term “continuing stream” to accurately and appropriately identify faculty in a variety of academic appointments including lecturers, teaching faculty, extension faculty, and clinical faculty. The UMass ADVANCE R3 model suggests that all faculty members thrive with access to three things: the resources they need to do their jobs, relationships with colleagues that allow them to grow and develop their careers, and recognition of their work, including rewarding their contributions. We add an additional R, emphasizing the importance of representation of faculty in university deliberations and decision-making. This report summarizes some key information and strategies for ensuring that continuing-stream faculty experience opportunity and equity in the workplace, including some “best practices” from units on campus.
  • PublicationOpen Access
    Example Department Personnel Committee Guidance on 2025 Higher Education Impacts
    (2025) Pachucki, Mark
    This document provides a generic template that any Department Personnel Committee can adapt to reflect the broad impacts that have shaped their departmental faculty's activity and achivements in contexts of disruption. The adapted DPC Impact Statement can be attached to all departmental faculty personnel files for that year, providing important context and guidance to reviewers of any given faculty member's file - be they internal to the university, or external reviewers. This template is adapted from the DPC Pandemic Impact Statement first composed by the UMass Amherst Sociology Department's Personnel Committee in 2021, with thanks to the original creators.
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