State Counterparts Research Articles

The association of Medicaid expansion and parathyroidectomy for benign disease: Insurance status remains an important factor in access to high-volume centers

BackgroundMedicaid expansion has been associated with improved access to surgical care at high-volume centers. Its impact on parathyroidectomy, however, is unclear. We evaluated the association between Medicaid expansion and parathyroidectomy at high- and low-volume centers. MethodsThe Vizient Clinical Data Base was queried for parathyroidectomies. Patients were grouped by insurance status and pre- and post-Medicaid expansion periods. Hospitals were stratified into tertiles (T1-T3) by operative volume (T1 = highest-volume centers). Odds of parathyroidectomy and a difference-in-differences analysis were conducted. ResultsIn total, 31,983 patients were identified. Patients were predominantly privately insured (49.9%). Uninsured and Medicaid patients had increasing odds of operation at lower-tertile centers (odds ratio: T1 = ref; uninsured: T2 = 10.0, T3 = 15.8; Medicaid: T2 = 6.2, T3 = 13.5; P < .001). Medicare patients, however, were less likely to undergo operation at lower-volume centers (odds ratio: T2 = 0.89, P < .001; T3 = 0.92, P = .002). Privately insured patients were the least likely to receive care at low-volume centers (odds ratio: T3 = 0.7, P < .001).Medicaid patients in nonexpansion states had 12–16 times higher odds of parathyroidectomy at lower-volume hospitals than their counterparts in expansion states (expansion/nonexpansion states: pre-expansion T3 = 2.3/28.0; postexpansion T3 = 1.3/21.4). Expansion was associated with an increase in the proportion of parathyroidectomy for Medicaid patients, with larger gains seen at higher-volume centers (T1 = 5.0%, P = .01; T2 = 3.1%, P = .001; T3 = 2.7%, P = .03). Expansion was not associated with changes in payor distribution for uninsured, Medicare, or privately insured patients. ConclusionsMedicaid expansion was associated with an increase in parathyroidectomy for Medicaid patients at high-volume centers. However, in nonexpansion states, access to surgical treatment at high-volume centers remains limited for uninsured and underinsured patients.

Solvatochromism, preferential solvation and excited state dipole moments of flufenamic acid in different solvent polarities

The influence of pure solvent and binary solvent mixtures on the optical properties of non-steroidal anti-inflammatory drug (NSAID) molecule, specifically flufenamic acid (FLA), has been studied using absorption and fluorescence spectroscopic techniques. A bathochromic shift is observed in the emission wavelength of FLA with an increase in the solvent polarity of pure solvents, attributed to the highest stability of the excited state. The spectral properties are correlated with Lippert–Mataga, solvent polarity parameter, Kamlet, and Catalan solvent polarity parameters, suggesting that both general and specific solvent effects influence the spectral properties, with general solvent effects dominating over specific solvent effects. Preferential solvation studies have been carried out in tetrahydrofuran (THF) and water solvent mixture, revealing variations in the preference for solvation of FLA as a function of the mole fraction of water. Solvatochromic data are utilized to estimate the excited state dipole moment in pure solvents using different solvatochromic methods, revealing that the excited state dipole moment of FLA is higher than its ground state counterpart. The increase in dipole moment in the excited state compared to the ground state is explained based on intramolecular charge transfer (ICT), with elaboration and discussion on the possible resonance structure corresponding to ICT, inferring the more polar nature of the excited state compared to the ground state. The effect of solute polarizability on the excited state dipole moment and change in dipole moment is also discussed.

Metrological robustness of high photon number optical cat states

Abstract In the domain of quantum metrology, cat states have demonstrated their utility despite their inherent fragility with respect to losses. Here, we introduce noise robust optical cat states which exhibit a metrological robustness for phase estimation in the regime of high photon numbers. These cat states are obtained from the intense laser driven process of high harmonic generation (HHG), and show a resilience against photon losses. Focusing on a realistic scenario including experimental imperfections we opt for the case in which we can maximize the lower bound of the quantum Fisher information (QFI) instead of analyzing the best case scenario. We show that the decrease of the QFI in the lossy case is suppressed for the HHG-cat state compared to the even and odd counterparts. In the regime of small losses of just a single photon, the HHG-cat state remains almost pure while the even/odd cat state counterparts rapidly decohere to the maximally mixed state. More importantly, this translates to a significantly enhanced robustness for the HHG-cat against photon loss, demonstrating that high photon number optical cat states can indeed be used for metrological applications even in the presence of losses.

The Costs of Voting and Voter Confidence

We revisit the effect of ballot access laws on voter confidence in the outcome of elections. Previous research found weak or no relationship between voter confidence and election laws regulating ballot access. We argue this non-finding is conditioned by partisanship. Democrats and Republicans view election laws through a partisan lens, which is especially triggered when coalitions lose. Republican voters see ballot restrictions as a means of securing the vote against fraud; Democratic voters see ballot restrictions as voter suppression. We maintain that the conditional partisan effect that election laws have on voter confidence is triggered or attenuated when partisans’ candidates lose elections. We find that in states where ballot access is costly, voter confidence among partisans and supporters of the losing Presidential candidate is significantly higher for Republicans and significantly lower for Democrats than their counterparts in states with less costly ballot access laws. These effects are greater for Republican than Democrats. We discuss the implications of our findings on election ecosystems and voter confidence.

Understanding coping with the climate crisis: an experimental study with young people on agency and mental health

ABSTRACT Background While the impact of climate change on mental health, especially in young people, has been acknowledged, underlying mechanisms of this relation remain elusive. Based on research on active coping, we explored effects of agency on anxiety and coping in an experimental design. We further examined the relation between mental health (i.e., psychopathology, depressiveness, trait anxiety), trait factors (i.e., climate distress, intolerance of uncertainty, trait coping), state anxiety and coping with climate distress. Methods 244 participants (15-25 years) watched a climate anxiety inducing video, followed by an agency manipulation (high agency vs. low agency vs. control). Trait mental health, intolerance of uncertainty, and climate distress and coping were examined as predictors of state anxiety and coping. Results State anxiety decreased in the high agency and control conditions, but not in the low agency condition. High agency led to increased meaning-focused coping and low agency to decreased meaning– and problem-focused coping. Trait mental health, problem-focused, and meaning-focused coping strategies each predicted their respective state counterparts. Emotion-focused coping was further predicted by all trait measures. Conclusion The findings suggest a risk of low agency communication due to the lack of arousal decrease and lack of using functional coping in young people.

Regional Disparities in Growth Patterns of Children with Cerebral Palsy: A Comparative Analysis of Saudi Arabian, UK, and US Data.

In order to understand the global variations in the growth trajectories of cerebral palsy patients, this study aimed to compare the growth patterns of cerebral palsy patients in Saudi Arabi with United States and United Kingdom counterparts. Anthropometric data from 107 participants with cerebral palsy in Saudi Arabia were collected, including age, gender, cerebral palsy type, Gross Motor Function Classification System level, birth weight, weight at assessment, height at assessment, body mass index, and head circumference at assessment. This study found discrepancies between the growth patterns of Saudi Arabian children with cerebral palsy and United Kingdom and the United States growth charts, particularly among those with severe cerebral palsy. Significant differences were observed in weight, height, and body mass index z-scores when comparing Saudi Arabian data with the United kingdom and United States reference data. These findings emphasize the importance of validating growth charts across different populations to ensure accurate monitoring and clinical management of children with cerebral palsy. Additionally, this study highlights the need for region-specific growth references to better address the diverse needs of individuals with cerebral palsy worldwide.

Paradiplomacy in Hard Times: Cooperation and Confrontation in Subnational U.S.–China Relations

Abstract What becomes of subnational foreign engagement when international tensions rise? State-level U.S.–China relations offer insights into unresolved theoretical questions about the dynamics of what we call “paradiplomacy in hard times.” Whereas U.S. state governments expanded official engagements with China in the early 2010s, many states and cities have scaled back engagement and introduced anti-PRC measures in recent years amid worsening U.S.–China friction. We draw on an original dataset of state-level policy actions toward China (2012–2022) to assess patterns of variation across time and space in subnational U.S.–China relations, showing that subnational foreign relations in times of tension feature distinct dimensions of cooperation and confrontation. Meanwhile, we use a detailed case study of Indiana–China relations to develop insights into drivers of subnational cooperation and confrontation, highlighting the diverging interests and actions of the business community, state officials, federal officials, political parties, and Chinese government counterparts in shaping states’ foreign relations.

Why American City Planning Needs a More Entrepreneurial Practice Modality

This commentary argues that current practice modalities are inadequate to meet the planning challenges of the day and that planners should seek out more entrepreneurial approaches. I offer three additional observations to support this argument: (1) the choice of local planning practice modality is too often determined by convention and familiarity; (2) local planners have become too reliant on regulation as their primary implementation tool; and (3) the recent performance record of counties in states with strong planning and regulatory regimes is underwhelming when compared with their counterparts in states with weaker planning regimes.

Health Equity Adjustment and Hospital Performance in the Medicare Value-Based Purchasing Program

Medicare's Hospital Value-Based Purchasing (HVBP) program will provide a health equity adjustment (HEA) to hospitals that have greater proportions of patients dually eligible for Medicare and Medicaid and that offer high-quality care beginning in fiscal year 2026. However, which hospitals will benefit most from this policy change and to what extent are unknown. To estimate potential changes in hospital performance after HEA and examine hospital patient mix, structural, and geographic characteristics associated with receipt of increased payments. This cross-sectional study analyzed all 2676 hospitals participating in the HVBP program in fiscal year 2021. Publicly available data on program performance and hospital characteristics were linked to Medicare claims data on all inpatient stays for dual-eligible beneficiaries at each hospital to calculate HEA points and HVBP payment adjustments. Hospital Value-Based Purchasing program HEA. Reclassification of HVBP bonus or penalty status and changes in payment adjustments across hospital characteristics. Of 2676 hospitals participating in the HVBP program in fiscal year 2021, 1470 (54.9%) received bonuses and 1206 (45.1%) received penalties. After HEA, 102 hospitals (6.9%) were reclassified from bonus to penalty status, whereas 119 (9.9%) were reclassified from penalty to bonus status. At the hospital level, mean (SD) HVBP payment adjustments decreased by $4534 ($90 033) after HEA, ranging from a maximum reduction of $1 014 276 to a maximum increase of $1 523 765. At the aggregate level, net-positive changes in payment adjustments were largest among safety net hospitals ($28 971 708) and those caring for a higher proportion of Black patients ($15 468 445). The likelihood of experiencing increases in payment adjustments was significantly higher among safety net compared with non-safety net hospitals (574 of 683 [84.0%] vs 709 of 1993 [35.6%]; adjusted rate ratio [ARR], 2.04 [95% CI, 1.89-2.20]) and high-proportion Black hospitals compared with non-high-proportion Black hospitals (396 of 523 [75.7%] vs 887 of 2153 [41.2%]; ARR, 1.40 [95% CI, 1.29-1.51]). Rural hospitals (374 of 612 [61.1%] vs 909 of 2064 [44.0%]; ARR, 1.44 [95% CI, 1.30-1.58]), as well as those located in the South (598 of 1040 [57.5%] vs 192 of 439 [43.7%]; ARR, 1.25 [95% CI, 1.10-1.42]) and in Medicaid expansion states (801 of 1651 [48.5%] vs 482 of 1025 [47.0%]; ARR, 1.16 [95% CI, 1.06-1.28]), were also more likely to experience increased payment adjustments after HEA compared with their urban, Northeastern, and Medicaid nonexpansion state counterparts, respectively. Medicare's implementation of HEA in the HVBP program will significantly reclassify hospital performance and redistribute program payments, with safety net and high-proportion Black hospitals benefiting most from this policy change. These findings suggest that HEA is an important strategy to ensure that value-based payment programs are more equitable.

Criminal background check laws and labor market inequality in the United States

AbstractResearch summaryA growing literature documents the effect of criminal justice contact on inequalities in the labor market. While ample evidence indicates that a criminal record itself imposes considerable disadvantage, the formal legal mechanisms that may contribute to criminal record‐based exclusion have received less empirical attention. The present study examines how one such mechanism—legal requirements for employers and license boards to perform criminal background checks—shapes labor market outcomes among formerly incarcerated people. The study draws from novel longitudinal data on the extensiveness of background check requirements at the state level, as well as individual‐level data on incarceration, wages, and unemployment from the Panel Study of Income Dynamics. Results show that while the extensiveness of state‐level background check requirements does not significantly affect the likelihood of unemployment, formerly incarcerated people residing in states where background check requirements are extensive are estimated to earn significantly lower wages than their counterparts in states with few screening mandates.Policy implicationsCriminal background check requirements stand as significant policy barriers that diminish the earning potential of formerly incarcerated people. Policy makers seeking to mitigate the collateral consequences of criminal convictions should narrow the scope of these laws to target specific, highly sensitive occupations, as opposed to broader workplace contexts. Reforms should also address persistent data quality issues in state criminal history record systems and shift the burdens imposed by incomplete or erroneous rap sheets. To minimize adverse self‐selection, background check procedures should clarify for applicants the role that a criminal history record may play in clearance decisions. Finally, future research should assess the marginal benefit of criminal background checks compared with other methods of screening prospective hires and licensees.

Performance of EOM-CCSD(T)(a)*-Based Quartic Force Fields in Computing Fundamental, Anharmonic Vibrational Frequencies of Molecular Electronically Excited States with Application to the Ã1A″ State of :CCH2 (Vinylidene).

Highly accurate anharmonic vibrational frequencies of electronically excited states are not as easily computed as their ground electronic state counterparts, but recently developed approximate triple excited state methods may be changing that. One emerging excited state method is equation of motion coupled cluster theory at the singles and doubles level with perturbative triples computed via the (a)* formalism, EOMEE-CCSD(T)(a)*. One of the most employed means for the ready computation of vibrational anharmonic frequencies for ground electronic states is second-order vibrational perturbation theory (VPT2), a theory based on quartic force fields (QFFs),fourth-order Taylor series expansions of the potential portion of the internuclear Watson Hamiltonian. The combination of these two is herein benchmarked for its performance for use as a means of computing rovibrational spectra of electronically excited states. Specifically, the EOMEE-CCSD(T)(a)* approach employing a complete basis set extrapolation along with core electron inclusion and relativity (the so-called "CcCR" approach) defining the QFF produces anharmonic fundamental vibrational frequencies within 2.83%, on the average, of reported gas-phase experimentally assigned values for the test set including the states of HCF, HCCl, HSiF, HNO, and HPO. However, some states have exceptional accuracy in the fundamentals, most notably for ν2 of HCCl in which the CcCR QFF value is within 1.8 cm-1 at 927.9 cm-1 (or 0.2%) of the experiment. Additionally, this approach produces rotational constants to, on the absolute average, within 0.41% of available experimental data, showcasing notable accuracy in the computation of rovibronic spectral data. Furthermore, utilizing a hybrid approach composed of harmonic CcCR force constants along with a set of simple EOMEE-CCSD(T)(a)*/aug-cc-pVQZ QFF cubic and quartic force constants is faster than using pure CcCR and better represents those modes that suffer from numerical instability in the anharmonic portion of the QFF, implying that this so-called "CcCR + QZ" QFF approach may be the best for future applications. Finally, complete, rovibrational spectral data are provided for :CCH2, a molecule of potential astrochemical interest, in order to aid in its potential future experimental rovibronic characterization.

Nanocarrier-mediated probiotic delivery: a systematic meta-analysis assessing the biological effects

Probiotics have gained a significant attention as a promising way to improve gut health and overall well-being. The increasing recognition of the potential health advantages associated with functional food products, leading to a specific emphasis on co-encapsulating probiotic bacteria and bioactive compounds within a unified matrix. To further explore this concept, a meta-analysis was performed to assess the effects of probiotics encapsulated in nanoparticles. A comprehensive meta-analysis was conducted, encompassing 10 papers published from 2017 to 2022, focusing on the encapsulation of probiotics within nanoparticles and their viability in various gastrointestinal conditions. The selection of these papers was based on their direct relevance to the research topic. Random-effect models were used to aggregate study-specific risk estimates. In the majority of studies, it was observed that nano-encapsulated nanoparticles showed improved viability over time compared to their free state counterparts. At various time intervals, the odds ratios (OR) with 95% confidence intervals (CI) were estimated using fixed and random effect models. At 0 min, the OR (95%CI) was 2.79 (2.79; 2.80) and 2.38 (2.14; 2.64) for. At 30 and 60 min observation was at similar rate of 2.23 (2.23; 2.24) and 2.05 (1.73; 2.43). However, at 90 min it was 1.39 (1.39; 1.39) and 1.66 (1.29; 2.14) and at 120 min 2.41 (2.41; 2.42) and 2.03 (1.63; 2.52). Overall evaluation of encapsulation revealed an improvement in probiotic bacterial viability in simulated the gastrointestinal environments.

Exploring NaCl-PuCl3 molten salts with machine learning interatomic potentials and graph theory

Actinide molten salts are the basis of the liquid fuels used in molten salt reactors. Due to the inherent difficulties associated with high temperature and hazardous conditions, experimental investigations of fundamental properties of these materials are usually challenging. In this work, we describe the structure and transport of NaCl-PuCl3 mixtures using computational techniques. Three compositions were considered (16, 25, and 36 mol% PuCl3) over a temperature range (730 – 1257 K) using ab initio molecular dynamics, which provided the necessary data sets for training machine learned interatomic potentials. Molecular dynamics simulations based on these potentials were then used to determine structure and transport properties. A substantial change was noted in the structure factor when increasing the PuCl3 content from 25 to 36 mol%. This change is linked to the aggregation of larger Pu3+ clusters. In addition, the similarity of the atomic environments of metal cations in molten salt systems to their solid states counterparts was investigated using an unsupervised learning technique. Finally, graph theory was employed to explore the structure and size of actinide networks. Consistent with the structure factor, a dense Pu3+ intermolecular structure is observed within the 36 mol% PuCl3 mixture. The structure of cation-cation inter-junctions is also discussed. In all cases, the diffusion of Pu3+ is significantly lower than that of Na+ and Cl−.

Emotion regulation as a complex system: A multi-contextual and multi- level approach to understanding emotion expression and cortisol reactivity among Chinese and US preschoolers.

Are children from "Eastern" cultures less emotionally expressive and reactive than children from "Western" cultures? To answer this, we used a multi-level and multi-contextual approach to understand variations in emotion displays and cortisol reactivity among preschoolers living in China and the United States. One hundred two preschoolers from China (N=58; 55% males) and the United States (N=44, 48% males) completed three (i.e., control, interpersonal-related, and achievement-related) emotion-challenging paradigms over 3 days. Behavioral emotion expressions were coded, and salivary cortisol was sampled 30minutes before and across 90minutes post-task. Without considering context, Chinese preschoolers displayed fewer levels of positive and negative emotion expressions relative to their United States counterparts. However, Chinese preschoolers displayed similar levels of expressions as their United States counterparts during an achievement-related challenge that is more salient to their sociocultural emphases and showed higher negative emotion expressions in this challenge, relative to other contexts. Moreover, only the achievement-related challenge elicited increased cortisol levels among Chinese preschoolers, and this was correlated with higher levels of negative expressions. For US preschoolers, no cortisol increase was observed in any challenging paradigms, nor was cortisol associated with emotional expressions. Findings counter prior notions that East Asian children are generally less emotionally expressive. Instead, an achievement-related challenge elicited higher emotion expression and cortisol reactivity among Chinese preschoolers, suggesting that children's emotion expression and biological reactivity may be most responsive to contexts salient to their socio-cultural environments. We discuss the importance of considering cultural contexts when studying emotion regulation. RESEARCH HIGHLIGHTS: Chinese preschoolers displayed lower overall positive and negative expressions relative to their US counterparts without considering situational contexts. Chinese preschoolers displayed similar levels of emotion expressions as their US counterparts during an achievement-related challenge salient to their social-cultural environment. Chinese preschoolers are particularly responsive to achievement-related challenges, relative to other emotion-challenging situations that are less culturally salient. No cortisol increase was observed in any of the emotion-challenging paradigms among US preschoolers. Children's emotion expression and biological reactivity may be most responsive to challenges relevant to their socio-cultural environments.

Negotiation Power: How Humanitarian Frontliners Get Things Done with Hard Bargainers

Hard bargainers are known to dictate terms. Humanitarian frontliners confront them daily. Some state and nonstate counterparts, guided by military necessity, are deemed so overpowering that it seems impossible to negotiate humanitarian necessity with them. And yet, humanitarians leverage negotiations with quite an edge. They construct working relationships and creative solutions to get access and deliver humanitarian aid to those affected by conflict. Humanitarians shape a responsible approach that can enrich the understanding of negotiation power. Guided by humanitarian principles, they do not exercise a power over anyone but leverage a power of getting things done with counterparts, through relational, transactional, and process moves. The purpose of this article is both descriptive and prescriptive. On the one hand, it provides examples to document humanitarian negotiation practices of empowerment and to contribute to a general theory of negotiation power. On the other hand, the article provides some recommendations from negotiation theory to empower humanitarians. Indirectly, by analyzing and supporting the power of humanitarian frontliners, this article also aims at refining the reflection and action of every negotiator when confronted with tough bargainers.

The Impact of Telemedicine Parity Requirements on Telehealth Utilization in the United States During the COVID-19 Pandemic.

Research has shown a dramatic increase in telehealth utilization during the COVID-19 pandemic and marked socioeconomic disparities in telehealth utilization. However, previous studies have shown discrepant findings on the association between the state's telehealth payment parity laws and telehealth utilization, and dearth of differential impact studies by subgroups. Using a nationally representative Household Pulse Survey from April 2021 to August 2022 and the logistic regression modeling, we estimated the impact of parity payment laws on overall, video, and phone telehealth utilization and related disparities by race and ethncity during the pandemic. We found that adults in parity states had 23% higher odds of telehealth utilization (odds ratio [OR] = 1.23; 95% confidence interval [CI], 1.14-1.33) and 124% higher odds of video telehealth utilization (OR = 2.24; 95% CI, 1.95-2.57) than their counterparts in nonparity states. In parity states, non-Hispanic White adults had 24% higher odds of telehealth utilization (OR = 1.24; 95% CI: 1.14, 1.35) and non-Hispanic Black adults had 31% higher odds of telehealth utilization (OR = 1.31; 95% CI: 1.03, 1.65), compared with those in nonparity states. For Hispanics, non-Hispanic Asians, and non-Hispanic other races, there was not a statistically significant effect of parity act on overall telehealth utilization. Given inequalities in telehealth utilization, increased state policy efforts are needed to reduce access disparities during the ongoing pandemic and beyond.

Choctaw Confederates: The American Civil War in Indian Country by Fay A. Yarbrough

Reviewed by: Choctaw Confederates: The American Civil War in Indian Country by Fay A. Yarbrough Christine A. Rizzi Choctaw Confederates: The American Civil War in Indian Country. By Fay A. Yarbrough. (Chapel Hill: University of North Carolina Press, 2021. Pp. [xii], 268. $32.95, ISBN 978-1-4696-6511-5.) Fay A. Yarbrough’s latest book, Choctaw Confederates: The American Civil War in Indian Country, provides a much-needed corrective to scholarship on Native experiences during the Civil War era. Yarbrough’s research does not focus on land loss, military tactics, or outside factors that influenced Native alliances with either the United States or the Confederacy. Rather, this new work highlights the internal debates and decisions that led to the Choctaw Nation’s early and consistent alliance with the Confederate States of America. Informed by sources ranging from military records to Choctaw policy, personal correspondence, and oral histories, Yarbrough’s study compellingly demonstrates that internal demands for the maintenance of slavery and the strengthening of tribal sovereignty drove the nation to support the Confederate war effort in 1861. The book provides important context by opening with two chapters that examine the role of slavery in the Choctaw Nation both before and after removal. Yarbrough demonstrates that, rather than feeling exclusively outside pressure to take on Euro-American ideas about property, race, and enslavement, Choctaws “adopted the practice of racialized slavery . . . in a manner that preserved Choctaw identity,” maintaining certain aspects of their traditional livelihoods while also building bonds with white southerners that they [End Page 149] hoped would insulate the nation from land theft (p. 48). Even after that possibility faded in the wake of removal, the Choctaws strengthened the institution of slavery in order to enshrine their own sovereignty and distinctiveness. According to Yarbrough, Choctaws’ demands for the protection of slavery and sovereignty directly informed their enthusiastic support for the Confederacy. The linchpin of her book is arguably the third chapter, which examines the internal debates within the nation regarding a potential Confederate alliance. Yarbrough’s close examination of Choctaw and Confederate treaty negotiations shows that the decision to form this alliance was far from “a foregone conclusion” (p. 111). Instead, Choctaw leaders saw “that the Confederacy proposed principles that were more in line with Choctaw goals than with federal ones” (p. 91). Yarbrough also shows that “the concrete benefits offered by the Confederate government” proved far more compelling to the Choctaws (p. 112). She demonstrates that ordinary Choctaw men and women enthusiastically supported the alliance, providing martial and material support to the Confederate war effort. Enlistment records, government policies, and personal correspondence suggest that Choctaw men willingly enlisted in the Confederate forces, especially in response to crises that threatened the status quo of slavery and sovereignty. Yarbrough further argues that Choctaw men were able to preserve traditional ideas about masculinity through their service in the war effort. The book closes with a chapter examining Reconstruction in Indian Country, comparing and contrasting the Choctaw experience with that of the larger postwar South. While the Choctaws similarly resisted efforts to incorporate freedpeople into the body politic, freedpeople within the nation had more immediate access to land than did their counterparts in the former Confederate states. According to Yarbrough, issues of kinship, sovereignty, and traditional ideas of labor and land led to the creation of complex policies regarding freedpeople in the Choctaw Nation. Choctaw Confederates succeeds mostly because of the careful use of oral histories and “side-streaming” in order to flesh out a story many considered difficult to tell due to a dearth of sources (p. 9). Using oral histories from the Indian Pioneer History Collection and ex-slave narratives recorded by the Works Progress Administration in Oklahoma, Yarbrough is able to tell this story from multiple perspectives, including those of enslaved people in Indian Territory. She uses sources from other Indian nations to supplement sources from the Choctaw Nation itself, allowing her to build a more detailed and nuanced understanding of how slavery and sovereignty informed decision making among Native peoples in the Civil War era. Christine A. Rizzi Broward College Copyright © 2023 The Southern Historical Association

Structures and comparison of endogenous 2-oxoglutarate and pyruvate dehydrogenase complexes from bovine kidney

The α-keto acid dehydrogenase complex family catalyzes the essential oxidative decarboxylation of α-keto acids to yield acyl-CoA and NADH. Despite performing the same overarching reaction, members of the family have different component structures and structural organization between each other and across phylogenetic species. While native structures of α-keto acid dehydrogenase complexes from bacteria and fungi became available recently, the atomic structure and organization of their mammalian counterparts in native states remain unknown. Here, we report the cryo-electron microscopy structures of the endogenous cubic 2-oxoglutarate dehydrogenase complex (OGDC) and icosahedral pyruvate dehydrogenase complex (PDC) cores from bovine kidney determined at resolutions of 3.5 Å and 3.8 Å, respectively. The structures of multiple proteins were reconstructed from a single lysate sample, allowing direct structural comparison without the concerns of differences arising from sample preparation and structure determination. Although native and recombinant E2 core scaffold structures are similar, the native structures are decorated with their peripheral E1 and E3 subunits. Asymmetric sub-particle reconstructions support heterogeneity in the arrangements of these peripheral subunits. In addition, despite sharing a similar monomeric fold, OGDC and PDC E2 cores have distinct interdomain and intertrimer interactions, which suggests a means of modulating self-assembly to mitigate heterologous binding between mismatched E2 species. The lipoyl moiety lies near a mobile gatekeeper within the interdomain active site of OGDC E2 and PDC E2. Analysis of the twofold related intertrimer interface identified secondary structural differences and chemical interactions between icosahedral and cubic geometries of the core. Taken together, our study provides a direct structural comparison of OGDC and PDC from the same source and offers new insights into determinants of interdomain interactions and of architecture diversity among α-keto acid dehydrogenase complexes.

Perceptions of risk to compound coastal water events: A case study in eastern North Carolina, USA

It is recognized that compound coastal water events (CCWE) - the combination of rain, river, and ocean flooding - often have increased disastrous consequences as compared to single-form floods due to their physical complexity. However, another potential reason is the lack of adequate understanding and effective response by hazard professionals. In rural eastern North Carolina (ENC), an under-resourced and CCWE-vulnerable region of the US, we survey and interview a focus group of primarily emergency managers and planners about their understanding of CCWE risk and the perceived obstacles in communicating this risk to their constituents. Likely due to recent hurricanes, hazard professionals in ENC are anecdotally aware of the sources and timing of floods in their communities, and the eleven counties represented in the study are quick to share data and experiences with each other. However, they see pluvial flooding outside of hurricanes as a growing problem and disclosed that risk communication to the public is a challenge because of a lack of tools and data to adequately describe CCWE. Finally, our case study participants felt they had a better understanding of CCWE than their state and federal counterparts and wanted to be more involved in response and recovery decision-making.

The Stability of a Hydrodynamic Bravais Lattice

We present the results of a theoretical investigation of the stability and collective vibrations of a two-dimensional hydrodynamic lattice comprised of millimetric droplets bouncing on the surface of a vibrating liquid bath. We derive the linearized equations of motion describing the dynamics of a generic Bravais lattice, as encompasses all possible tilings of parallelograms in an infinite plane-filling array. Focusing on square and triangular lattice geometries, we demonstrate that for relatively low driving accelerations of the bath, only a subset of inter-drop spacings exist for which stable lattices may be achieved. The range of stable spacings is prescribed by the structure of the underlying wavefield. As the driving acceleration is increased progressively, the initially stationary lattices destabilize into coherent oscillatory motion. Our analysis yields both the instability threshold and the wavevector and polarization of the most unstable vibrational mode. The non-Markovian nature of the droplet dynamics renders the stability analysis of the hydrodynamic lattice more rich and subtle than that of its solid state counterpart.