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  • Ending the filibuster would likely have limited effects on gridlock

    Ending the filibuster would likely have limited effects on gridlock

    What the study found

    The study finds that ending the filibuster would likely change gridlock only in a limited number of cases. The authors describe the practical effects as more muted than some supporters of elimination expect.

    Why the authors say this matters

    The authors suggest this matters because political and media elites have called for ending the filibuster in response to gridlock in Washington. The findings indicate that eliminating it is not a general solution, but the abstract does not give further policy guidance.

    What the researchers tested

    The researchers derived a series of legislative bargaining models, which are formal models of how lawmakers negotiate and make decisions. They then used gridlock data from Binder (2015) to run simulations of what might happen if the filibuster were removed.

    What worked and what didn't

    The simulations suggest that removing the filibuster would affect gridlock only under narrow conditions. The abstract says the results are less dramatic than the view that getting rid of the filibuster would be a panacea, or a cure-all.

    What to keep in mind

    The abstract does not describe the specific circumstances in which effects would appear, beyond saying they are narrow. It also does not provide details on the full model assumptions or any limitations of the simulation design.

    • Eliminating the filibuster would likely affect gridlock only in a narrow set of circumstances.
    • The study uses legislative bargaining models and simulations based on gridlock data from Binder (2015).
    • The abstract says the practical effects of ending the filibuster are more muted than some people believe.
    • The paper frames the filibuster debate in response to perennial gridlock in Washington.
  • Bose–Einstein condensate emits harmonics in a pure quantum state

    Bose–Einstein condensate emits harmonics in a pure quantum state

    What the study found

    The study found that high harmonic generation from a Bose–Einstein condensate, a state of matter formed at ultracold temperatures, can be linked to the quantum state of the emitted harmonic radiation. The authors report that below the critical temperature of Bose–Einstein condensation, the emitted harmonic radiation is in a pure quantum state, while the generated harmonics of a driven Bose gas are a classical mixture.

    Why the authors say this matters

    The authors say this connects matter waves at ultracold temperatures with radiation bursts on the ultrafast attosecond timescale. The study suggests this brings together two processes that had previously been considered separately: cooling and trapping atoms into a Bose–Einstein condensate and high-order harmonic generation.

    What the researchers tested

    The researchers explored high harmonic generation from a Bose–Einstein condensate. They compared the quantum state of harmonics generated from a driven Bose gas with the emitted harmonic radiation below the critical temperature of Bose–Einstein condensation.

    What worked and what didn't

    The study reports that the quantum state of the generated harmonics of a driven Bose gas is a classical mixture. It also reports that below the critical temperature, the emitted harmonic radiation is a pure quantum state and that these states exhibit squeezing and entanglement across all field modes.

    What to keep in mind

    The abstract does not describe experimental details, measurements, or limitations beyond the reported temperature-related comparison. No additional caveats are stated in the available summary.

    • High harmonic generation was explored in relation to a Bose–Einstein condensate.
    • Below the Bose–Einstein condensation critical temperature, the emitted harmonic radiation was reported to be in a pure quantum state.
    • The generated harmonics of a driven Bose gas were reported to be a classical mixture.
    • The reported states exhibit squeezing and entanglement across all field modes.
    • The authors describe a connection between ultracold matter waves and attosecond radiation bursts.

  • Cross-domain hearing test battery showed age- and PTA-related norms

    What the study found

    The study provided normative values for a clinically feasible audiological-vestibular test battery, including measures whose age and pure-tone average (PTA, the average hearing threshold across selected tones) dependencies had been unclear. Age and PTA were related to some test outcomes, while vestibular tests showed no age effects.

    Why the authors say this matters

    The authors conclude that these reference values may help with future applications such as phenotype-genotype relations in specified cohorts. They also suggest that age and PTA should be taken into account when interpreting these tests.

    What the researchers tested

    The researchers proposed a cross-domain test battery through multidisciplinary consensus. They then compared measurements from two centres, Germany and France, to assess centre effects, and analysed age and PTA effects for each test in 55 participants aged 40 years or older who had hearing thresholds better than the age-dependent median of PTA.

    What worked and what didn't

    Centre effects were negligible, so the data were pooled across centres. Age- and PTA-dependent reference data were derived, and age and PTA effects were found for some tests, especially audiological-functional tests. No age effects were found for vestibular tests.

    What to keep in mind

    The sample was small and limited to age-appropriate normal-hearing controls from two centres. The abstract does not describe other limitations beyond noting that extensive data documentation and verification are essential for cross-centre comparability.

    • A clinically feasible audiological-vestibular test battery was proposed for characterising age-related hearing loss.
    • Reference data were derived after pooling measurements from two centres because centre effects were negligible.
    • Age and pure-tone average affected some tests, especially audiological-functional measures.
    • No age effects were found for vestibular tests.
    • The authors say age and PTA should be considered when interpreting these tests in future work.

  • Resilience, spiritual well-being, and self-esteem were positively linked

    What the study found

    Among university students with disabilities in Jordan, higher resilience was associated with higher spiritual well-being and higher self-esteem. The study also found that students with visual disabilities reported higher spiritual well-being and self-esteem than students with other disabilities.

    Why the authors say this matters

    The authors conclude that the positive associations point to a prompt need for psychological support across different types of disabilities. They also suggest that continuous nursing assessment and psycho-social intervention should be considered in university health programs.

    What the researchers tested

    The researchers used a cross-sectional correlational design and recruited university students with visual, hearing, and motor disabilities in Jordan through convenience sampling from February to April 2025. Participants completed an electronic survey with measures of resilience, spiritual well-being, and self-esteem.

    What worked and what didn't

    A total of 110 students participated. Mean scores were 71.29 out of 100 for resilience, 36.30 out of 48 for spiritual well-being, and 29.60 out of 40 for self-esteem. Significant positive correlations were found between resilience and spiritual well-being, resilience and self-esteem, and spiritual well-being and self-esteem; lower self-esteem was also observed among first-year students.

    What to keep in mind

    The study used convenience sampling and a cross-sectional design, so the abstract does not describe causal effects. The summary also does not provide additional limitations beyond the sample size and participant groups described.

    • The study examined university students with visual, hearing, and motor disabilities in Jordan.
    • Resilience was positively correlated with spiritual well-being and self-esteem.
    • Spiritual well-being and self-esteem were also positively correlated.
    • Students with visual disabilities reported higher spiritual well-being and self-esteem.
    • First-year students showed lower self-esteem.
    • The authors call for psychological support and psycho-social intervention in university health programs.

  • Rarefaction weakens electromagnetic flow control in hypersonic plasma

    What the study found

    The study found that rarefaction, meaning the gas becomes more dilute and less continuum-like, weakens electromagnetic flow control around a hemisphere in hypersonic conditions. It also reports that a multiscale plasma solver can model this type of problem across near-continuum and rarefied regimes.

    Why the authors say this matters

    The authors conclude that the results highlight the capability of the UGKWP method for electromagnetic control problems and emphasize the role of rarefied effects in predicting flow-control behaviour. They also state that this underscores the need for multiscale modelling in plasma flow applications.

    What the researchers tested

    The researchers applied the unified gas-kinetic wave-particle (UGKWP) method, a multiscale simulation approach for partially ionised plasmas, to electromagnetic flows around a hemisphere spanning near-continuum to rarefied conditions. They treated neutrals, ions, and electrons as separate species and validated the implementation against experimental data for a Mach 4.75 pre-ionised argon flow.

    What worked and what didn't

    The UGKWP results showed close agreement with the experimental data for the Mach 4.75 pre-ionised argon case. A comparative study across different Knudsen numbers, which measure how rarefied a gas is, showed that as rarefaction increased, the influence of electromagnetic control became weaker.

    What to keep in mind

    The abstract does not describe detailed numerical errors, experimental uncertainties, or other limitations. Its findings are specific to a hemisphere geometry, hypersonic flow, and the tested plasma conditions.

    • UGKWP was applied to electromagnetic flow around a hemisphere across near-continuum and rarefied regimes.
    • The method treated neutrals, ions, and electrons as separate species.
    • Validation against Mach 4.75 pre-ionised argon experiments showed close agreement.
    • Across different Knudsen numbers, rarefaction weakened electromagnetic control.
    • The authors say the results support multiscale modelling for plasma flow applications.

  • Cyclical suicidality and self-harm peak around the luteal phase

    What the study found

    The study found cyclic changes in suicidal ideation and self-harm ideation across the menstrual cycle in people being evaluated for premenstrual disorders. Symptoms were most severe in the late luteal phase, improved by the start of menses, and re-emerged around ovulation.

    Why the authors say this matters

    The authors conclude that prospective, continuous symptom tracking may help identify high-risk periods and inform targeted prevention strategies. The study suggests that psychosocial vulnerabilities may further worsen cyclical suicidality and self-harm.

    What the researchers tested

    Participants completed daily ratings of premenstrual disorder symptoms, suicidal symptoms, and self-harm symptoms across two menstrual cycles. The researchers confirmed premenstrual disorder diagnosis with these ratings and used phase-aligned cycle time scaling and generalized additive mixed models to test for cyclic patterns.

    What worked and what didn't

    In the full sample, menstrual cyclicity was significant for suicidal ideation and self-harm ideation, with deviance explained of 38% and 21.6%, respectively. Cyclicity was statistically significant only in participants above the premenstrual disorder diagnostic threshold (n = 35), while it was nonsignificant in those below threshold (n = 29). Within the above-threshold group, psychiatric comorbidities, social support, childhood adversities, life stressors, baseline suicidal risk, and mid-follicular depressive symptoms shaped the cyclic patterns.

    What to keep in mind

    The abstract does not describe limitations beyond the limited prospective literature noted in the background. The findings come from people being evaluated for premenstrual disorders, so the summary does not establish how well they apply to broader populations.

    • Suicidal ideation and self-harm ideation showed menstrual-cycle-related changes in the study sample.
    • Symptoms peaked in the late luteal phase, eased by menses onset, and returned around ovulation.
    • Cyclicity was significant only among participants above the premenstrual disorder diagnostic threshold.
    • Psychosocial factors such as comorbidities, social support, and life stressors influenced cyclical patterns within the above-threshold group.
    • The authors say continuous symptom tracking may help identify high-risk periods.
  • Canopy density depends on turbulent-structure penetration

    Canopy density depends on turbulent-structure penetration

    What the study found

    The study found that canopy density regimes are better described by how far turbulent eddies penetrate into the canopy than by frontal density alone. Canopies with the same frontal density can behave differently depending on their layout, especially the spanwise gap, which is the gap across the flow direction.

    Why the authors say this matters

    The authors conclude that frontal density may not always capture the underlying physics for less conventional canopy topologies. The study suggests that an effective spanwise gap, compared with typical eddy size, may provide a more direct way to characterize canopy density regimes.

    What the researchers tested

    The researchers used direct simulations of turbulent flow over canopies of rigid elements with different geometries, spacings, and Reynolds numbers. They studied isotropic-layout and anisotropic-layout canopies with frontal densities from about 0.01 to 2.04, heights from about 44 to 266 in wall units, width-to-pitch ratios from about 0.06 to 0.7, and Reynolds numbers from about 180 to 2000.

    What worked and what didn't

    Frontal density was effective for conventional vegetation-like canopies with no preferred orientation, but it did not fully describe some less conventional layouts. For the same frontal density, streamwise-packed canopies with large spanwise gaps allowed deeper penetration and appeared sparser, while canopies with the same spanwise gap showed similar penetration even when streamwise pitch and gap changed. As spanwise gap increased, eddies penetrated deeper and more strongly, and the same canopy could look dense at low Reynolds number but increasingly sparse at higher Reynolds number.

    What to keep in mind

    The results come from simulations of rigid-element canopies, so the abstract does not claim they directly cover all real canopies. The paper also does not provide experimental validation in the abstract, and it does not describe limitations beyond the scope of the tested geometries and flow conditions.

    • Frontal density alone did not fully characterize density regime for some canopy layouts.
    • Spanwise gap strongly affected how deeply turbulent eddies penetrated into the canopy.
    • Canopies with the same frontal density could appear denser or sparser depending on element arrangement.
    • Turbulence penetration changed with Reynolds number, with some canopies becoming effectively sparser at higher values.
    • The authors propose using an effective spanwise gap and a penetration length to describe canopy behavior.

  • Regional cooperation is presented as key to competitiveness in the Western Balkans

    What the study found

    The article argues that industrial policies and strategies for skill formation are key to improving productivity, competitiveness, and growth in the Western Balkans. It also describes two alternative growth models: FDI-led growth, which gives less attention to labour force skills, and skills-led growth, which gives less attention to attracting low-technology FDI.

    Why the authors say this matters

    The authors suggest that a more balanced, regionally cooperative approach could improve growth prospects by linking foreign direct investment (FDI, investment by companies based in other countries) with local innovation and appropriate labour force skills. They also conclude that this approach could reduce the scope for state capture, which they say thrives in small closed national markets.

    What the researchers tested

    This is a research article that discusses policy options for the Western Balkan region. The authors examine industrial and educational policy cooperation and consider how these policies might support FDI attraction, local small business networks, and workforce skill development.

    What worked and what didn't

    The article presents two growth models, each with trade-offs: FDI-led growth pays less attention to labour force skills, while skills-led growth pays less attention to attracting low-technology FDI. The authors favour a more balanced regional approach that combines both priorities.

    What to keep in mind

    The abstract does not provide empirical results, data, or a specific evaluation of policy outcomes. The available summary mainly presents the authors' argument and recommendations, rather than tested interventions.

    • The article argues that industrial policy and skill formation are central to growth in the Western Balkans.
    • It identifies two alternative growth models: FDI-led growth and skills-led growth.
    • The authors recommend a balanced regional approach that combines FDI attraction with local innovation and workforce skills.
    • They say regional cooperation could help integrate regional value chains into global markets.
    • The authors also suggest this approach could reduce state capture in small closed national markets.

  • Machine-learning models captured NbSe2 charge density waves

    What the study found

    The study found that machine-learning interatomic potentials could reliably simulate charge density waves (CDWs, repeating patterns of electron density linked to a matching lattice distortion) in mono- and bilayer niobium diselenide. It also found that the lattice distortions were easier to learn than vibrational properties.

    Why the authors say this matters

    The authors say this opens new possibilities for studying and tuning CDWs in NbSe2 and other two-dimensional systems. They also state that it has implications for electron-phonon coupling, superconductivity, and advanced materials design.

    What the researchers tested

    The researchers developed a physically informed workflow for training machine-learning interatomic potentials based on the E(3)-equivariant Allegro architecture. They tailored the models to capture structural and dynamical features of CDWs in mono- and bilayer NbSe2, including effects of dimensionality, stacking, and strain.

    What worked and what didn't

    The models could capture commensurate and incommensurate CDW phases, as well as their sensitivity to dimensionality and stacking. They also enabled simulations of CDW dynamics, phonons, and transition temperatures estimated with the stochastic self-consistent harmonic approximation. However, vibrational properties were more challenging to model and required targeted dataset design and careful hyperparameter tuning.

    What to keep in mind

    The abstract emphasizes that modeling vibrational properties remained difficult, so the approach needed careful dataset design and hyperparameter tuning. The summary provided does not describe other limitations beyond these modeling challenges.

    • Machine-learning interatomic potentials were used to model charge density waves in mono- and bilayer NbSe2.
    • CDW lattice distortions were easier to learn than vibrational properties.
    • The models simulated commensurate and incommensurate CDW phases and their sensitivity to dimensionality and stacking.
    • Targeted dataset design and careful hyperparameter tuning were needed for vibrational properties.
    • The work links to studies of electron-phonon coupling, superconductivity, and advanced materials design.

  • Political ideology divergence is linked to more ESG engagement

    What the study found

    The study found that greater political ideology divergence, meaning the absolute ideological distance between an entrepreneur and state governance, is associated with increased entrepreneurial firm engagement in environmental, social, and governance (ESG) practices. It also found that research and development (R&D) investment and lobbying can weaken this relationship.

    Why the authors say this matters

    The authors conclude that the findings shift attention in research on the political economy of entrepreneurship from institutional constraints to entrepreneurial agency. They suggest this helps explain how entrepreneurs interpret and strategically respond to political ideology divergence.

    What the researchers tested

    The researchers studied entrepreneur-led firms in the United States from 2010 to 2020. They used longitudinal data from 605 firms and examined how political ideology divergence related to ESG engagement, along with the roles of R&D investment and lobbying.

    What worked and what didn't

    The analysis found that larger political ideology divergence was associated with more ESG engagement at the firm level. It also found that R&D investment and lobbying moderated this relationship by attenuating the association between divergence and ESG engagement.

    What to keep in mind

    The abstract describes a U.S. sample of entrepreneur-led firms, so the findings are limited to that setting. No additional limitations are described in the available summary.

    • Political ideology divergence is defined as the absolute ideological distance between an entrepreneur and state governance.
    • Greater divergence was associated with more firm engagement in ESG practices.
    • R&D investment and lobbying weakened the association between divergence and ESG engagement.
    • The study used longitudinal data from 605 entrepreneur-led U.S. firms from 2010 to 2020.
    • The authors say the findings highlight entrepreneurial agency in response to political ideology divergence.