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  • Resistance fluctuations reveal entropic barriers in memristive device

    What the study found

    The study found that resistance fluctuations in a memristive device can be described by transitions among many local minima in a high-dimensional free energy landscape. In germanium telluride, the measured transition rates were Arrhenius-like, but the inferred attempt frequencies varied by several orders of magnitude and were sometimes far below typical phonon frequencies.

    Why the authors say this matters

    The authors suggest that the usual single-energy-barrier picture may underestimate the complexity of atomic dynamics in memristive devices. They conclude that their approach should be broadly applicable to memristive materials where large resistance changes are linked to atomic-scale transitions.

    What the researchers tested

    The researchers used a hidden Markov model, a statistical method for identifying unobserved states from noisy data, to analyze resistance fluctuations in a nanoscopic volume of phase-change material germanium telluride. They quantified transition rates between discrete resistance states across a wide temperature range and tracked individual transitions to estimate entropic contributions to the free energy barriers.

    What worked and what didn't

    The transition rates followed an Arrhenius-like temperature dependence. However, the extracted attempt frequencies spanned several orders of magnitude, and this spread was associated with substantial entropic contributions to the free-energy barriers. The abstract does not report any failed tests or negative results beyond showing that a simple single-barrier description was incomplete.

    What to keep in mind

    The summary describes one material system, germanium telluride, so the results are shown for that case rather than for all memristive devices. The abstract does not provide detailed experimental limitations, and it does not describe uncertainty estimates beyond the reported spread in attempt frequencies.

    • Resistance fluctuations were analyzed as transitions among many local minima in a free energy landscape.
    • The study used a hidden Markov model to identify discrete resistance states from noisy measurements.
    • Transition rates in germanium telluride were Arrhenius-like across a wide temperature range.
    • Attempt frequencies varied by several orders of magnitude and were sometimes far below typical phonon frequencies.
    • The authors attribute this spread to substantial entropic contributions to free-energy barriers.

  • Projected watershed health declines under several climate scenarios

    What the study found

    The study found that the Nekarood Watershed in northern Iran had a moderate baseline health status, based on reliability, resilience, and vulnerability indices and a watershed health index. Future climate scenarios were associated with projected changes in watershed health across two time periods.

    Why the authors say this matters

    The authors conclude that this spatial modeling approach can improve decision-makers' understanding of temporal changes in the Nekarood Watershed. The study suggests it can also support simulation of climate impacts on land characteristics, including pollutant loads and overall watershed health.

    What the researchers tested

    The researchers evaluated watershed health using a conceptual model based on reliability, resilience, and vulnerability. They simulated climate data for 2021–2050 and 2051–2080 with six models under Shared Socioeconomic Pathways scenarios, downscaled the data with the LARS-WG model, and used the physically based Soil and Water Assessment Tool (SWAT) to predict discharge, sediment, nitrate, and phosphate.

    What worked and what didn't

    Under baseline conditions, the reliability, resilience, and vulnerability indices were 0.46, 0.53, and 0.85, and the watershed health index was 0.59. Projected watershed health index changes varied by scenario: SSP126 showed -2.7% and -6.6%; SSP245 showed -6.1% and +0.7%; SSP370 showed -5.7% and -5.0%; and SSP585 showed -3.2% and -18.7% for the two future periods.

    What to keep in mind

    The abstract does not describe model uncertainty, validation details, or limitations beyond the scenario-based scope. The results are specific to the Nekarood Watershed and to the climate scenarios and methods used in this study.

    • The Nekarood Watershed had a moderate baseline watershed health index of 0.59.
    • Baseline reliability, resilience, and vulnerability indices were 0.46, 0.53, and 0.85.
    • Future watershed health index changes differed across SSP scenarios and time periods.
    • SSP585 showed the largest projected decline in the later period, at -18.7%.
    • The study used downscaled climate scenarios and the SWAT model to estimate discharge and pollutant loads.

  • Stress-related willingness to wait varied over seconds, not days

    What the study found

    The study found that willingness to wait, described as an individual's discount factor, changed reliably over seconds in response to endogenous stress but did not show the same variation over days.

    Why the authors say this matters

    The authors conclude that these findings matter for understanding how stress affects economic decisions made at different time scales. They suggest that fluctuations in stress responses to the environment may help explain consumer behaviors such as impulse purchases, even among healthy adults.

    What the researchers tested

    The researchers used a multi-session design with 34 participants to examine whether chronic stress measures were associated with economic choices across different time scales within the same people. They measured chronic stress using questionnaires, saliva, and hair samples.

    What worked and what didn't

    The degree to which people thought waiting was worthwhile varied reliably over seconds in response to endogenous stress. It did not vary over days in the same way. The abstract also notes that little was known before this study about how chronic stress influences decisions about immediate versus delayed rewards.

    What to keep in mind

    The abstract gives no detailed limitations beyond the small sample size of 34 participants. It also does not provide full information on the task design, effect sizes, or whether the findings generalize beyond this study population.

    • Endogenous stress was linked to changes in willingness to wait over seconds.
    • The same measure did not vary reliably over days.
    • The study used questionnaires, saliva, and hair samples to assess chronic stress.
    • The sample included 34 participants in a multi-session design.
    • The authors connect the findings to economic decisions such as impulse purchases.

  • Global tariffs converged long term, then diverged after 2018

    What the study found

    The study found a long-term convergence in global tariffs, meaning countries with higher tariff levels reduced them faster over time. It also found a post-2018 divergence led by the United States, after a period in which tariff differences across countries had generally been narrowing.

    Why the authors say this matters

    The authors conclude that the findings point to a structural shift in global tariff policy and suggest that uncoordinated protectionism can disrupt policy alignment and increase uncertainty for global value chains. They also state that international coordination, institutional reform, and multilateral negotiation remain important for sustaining openness.

    What the researchers tested

    The researchers analyzed a balanced panel dataset for the USA, China, Japan, the European Union, and the world average from 1990 to 2020. They used beta-convergence and sigma-convergence tests, Quandt-Andrews structural break tests, and a difference-in-differences model, with Driscoll-Kraay standard errors to address cross-sectional dependence and serial correlation.

    What worked and what didn't

    Beta-convergence results showed that initially high-tariff economies reduced tariffs more rapidly. Sigma-convergence results showed a steady decline in cross-country tariff dispersion, though the pace slowed after the 2000s. Structural break tests identified liberalization episodes in the European Union in 1993, Japan in 1995, and China in 1994 and 2001, while the United States showed clear divergence after 2018; the difference-in-differences estimates showed US tariffs increased significantly relative to other economies.

    What to keep in mind

    The tariff data end in 2020, so the analysis does not fully capture the final phase of the Trump administration's protectionist measures or the broader trade disruptions caused by COVID-19. The study also focuses only on tariff indicators and does not include non-tariff measures.

    • Global tariffs showed a long-term convergence trend from 1990 to 2020.
    • Cross-country tariff dispersion declined over time, but convergence slowed after the 2000s.
    • The European Union, Japan, and China each had identified liberalization turning points linked to institutional reforms.
    • The United States diverged after 2018, with tariffs rising significantly relative to other economies.
    • The dataset ends in 2020 and does not include non-tariff measures.

  • Micro:bit-based activities improved pre-service teachers’ self-perceived CT knowledge

    What the study found

    The study found significant increases in pre-service mathematics teachers' self-perceived computational thinking (CT, the ability to solve problems using step-by-step, algorithmic thinking) content knowledge and positive attitudes after a micro:bit-based intervention. Two negative emotions, frustration and boredom, persisted regardless of individual characteristics.

    Why the authors say this matters

    The authors conclude that integrating CT into pre-service teacher education in higher education institutions may be beneficial for future K-12 mathematics instruction. They also say the findings support the internal consistency and preliminary construct validity of the measurement instruments used.

    What the researchers tested

    The researchers studied 228 pre-service mathematics teachers in various courses using a pre-experimental design. The intervention followed a six-step sequence: introducing CT concepts through divisibility content, moving to visual block programming and Python coding, and ending with a physical calculator for identifying factors and divisors.

    What worked and what didn't

    The intervention was associated with significant increases in self-perceived CT content knowledge and positive attitudes. Frustration, described as an activating negative emotion, and boredom, described as a deactivating negative emotion, persisted across the sample and did not vary by individual characteristics.

    What to keep in mind

    The abstract does not describe detailed limitations beyond noting that the participants were initially underprepared to teach CT concepts. The results are based on self-perceived measures and a pre-experimental design, as stated in the abstract.

    • 228 pre-service mathematics teachers took part in courses using a pre-experimental design.
    • A six-step intervention used divisibility content, visual block programming, Python coding, and a physical calculator activity.
    • Self-perceived CT content knowledge increased significantly after the intervention.
    • Positive attitudes also increased significantly.
    • Frustration and boredom persisted regardless of individual characteristics.
    • The authors say the findings support the potential benefits of CT integration in pre-service teacher education.

  • Childhood mandibular odontogenic myxoma presented with trismus

    What the study found

    The report describes a 5-year-old boy with a rare benign odontogenic tumour, meaning a tumour related to tooth-forming tissues, in the mandible (lower jaw) that presented mainly as long-standing trismus, or limited mouth opening. After treatment, the tumour did not recur during 1 year of follow-up, but the boy still had severe limitation of mouth opening.

    Why the authors say this matters

    The authors conclude that this case shows paediatric odontogenic myxoma of the mandible can present primarily with trismus and that persistent functional impairment can remain even after successful tumour removal. They also state that prolonged, progressive trismus in a child should be treated as a red-flag symptom that warrants prompt imaging and specialist evaluation.

    What the researchers tested

    This was a case report of a single 5-year-old boy. The team used orthopantomogram imaging, which is a panoramic dental X-ray, and MRI, then confirmed the diagnosis with biopsy before treating the lesion with enucleation and curettage, meaning surgical removal and scraping of the tumour.

    What worked and what didn't

    Imaging showed a multilocular radiolucent lesion in the left mandibular body and ramus with medial cortical perforation and close relation to the medial pterygoid muscle. Biopsy confirmed odontogenic myxoma, and surgery preserved mandibular continuity; at 1 year there was good radiographic bone regeneration and no evidence of recurrence, but mouth opening remained severely limited despite physiotherapy and jaw-stretching exercises. The inferior alveolar nerve was sacrificed during treatment.

    What to keep in mind

    This is a single case report, so the findings come from one child and cannot be generalized on their own. The abstract does not describe a comparison group or longer-term follow-up beyond 1 year.

    • A 5-year-old boy with mandibular odontogenic myxoma presented mainly with long-standing trismus.
    • Orthopantomogram and MRI showed a multilocular lesion in the left mandible with medial cortical perforation.
    • Biopsy confirmed odontogenic myxoma before surgery.
    • Enucleation and curettage preserved mandibular continuity, but the inferior alveolar nerve was sacrificed.
    • At 1-year follow-up, there was no recurrence and good bone regeneration, but severe mouth-opening limitation persisted.

  • English remains dominant in scholarly communication

    What the study found

    The study found that English remains the dominant language in scholarly communication, but only Indonesian, Portuguese, and Spanish expanded faster than English from 1990 to 2023. It also found that multilingual publishing is closely linked to bibliodiversity, meaning the variety of languages used in scholarly publishing.

    Why the authors say this matters

    The authors suggest these findings matter because language is a major source of systemic inequities in science, especially for scholars whose first language is not English. They conclude that policies recognizing both national-language and English-language publications have had a concrete impact on how languages are distributed in global scholarly communication.

    What the researchers tested

    The researchers carried out a large-scale bibliometric analysis using two major databases, OpenAlex and Dimensions. They examined the language of publications and the language of cited references, covering 87,577,942 publications and 1,480,570,087 cited references from 1990 to 2023.

    What worked and what didn't

    The analysis showed faster growth for Indonesian, Portuguese, and Spanish than for English. Country-level results indicate that this pattern is linked to the growing strength of Latin American and Indonesian academic circuits, and the study also confirms a same-language preference phenomenon, especially for languages other than English.

    What to keep in mind

    The abstract does not describe specific limitations beyond the use of two bibliometric databases. The findings are based on publication and citation language patterns at global and country levels for the 1990–2023 period.

    • English remained the dominant language, but it was outpaced in growth by Indonesian, Portuguese, and Spanish.
    • The study analyzed both publication languages and the languages of cited references.
    • Latin American and Indonesian academic circuits were linked to the growth of non-English languages.
    • The authors report a same-language preference, especially for non-English languages.
    • Social sciences and humanities were identified as the least English-dominated fields.

  • Institutions’ contributions to OR/MS practice literature are tracked over time

    What the study found

    The study presents a way to measure which institutions prioritize operations research and management science (OR/MS) in practice literature. It offers both a current view and a 30-year time series view of institutional contribution.

    Why the authors say this matters

    The authors say this continues a 30-year tradition of measuring institutional contribution to applied research in OR/MS. The findings indicate a way to track which institutions prioritize OR/MS in practice.

    What the researchers tested

    The article examines institutional contribution to applied research in OR/MS practice literature. It uses a current assessment and a historical time series spanning 30 years.

    What worked and what didn't

    The abstract states that the work provides both a current and time series view of institutional contribution. It does not describe specific comparative rankings, quantitative results, or any measures that did not work.

    What to keep in mind

    The available summary is brief and does not describe methods, data sources, or detailed results. It also does not state any limitations.

    • The study measures institutional contribution to applied OR/MS research.
    • It provides both a current view and a 30-year time series view.
    • The work focuses on OR/MS practice literature.
    • The abstract does not give specific rankings or numerical results.
    • No limitations are described in the available summary.

  • OER adoption in higher education improved engagement and performance

    What the study found

    The review found that open educational resources, or OER—teaching and learning materials that are openly available for use and adaptation—were linked with better student engagement, academic performance, and equity in higher education. It also found that adoption was often limited by resistance, low awareness, infrastructure gaps, fragmented repositories, and policy deficiencies.

    Why the authors say this matters

    The authors conclude that strategic, policy-driven adoption positions OER as a foundational element of inclusive, sustainable, and innovation-driven higher education ecosystems. The study suggests that OER may support broader access and pedagogical innovation.

    What the researchers tested

    The researchers conducted a systematic review of peer-reviewed literature on OER in higher education published between 2015 and 2026. They searched Scopus, Web of Science, Taylor & Francis, and Google Scholar, and included 36 studies after screening and eligibility assessment.

    What worked and what didn't

    The review reported that OER, including open textbooks, full courses, multimedia, and interactive modules, were associated with improved engagement, academic performance, and equity through the 5Rs framework: retain, reuse, revise, remix, and redistribute. It also found that effective implementation required institutional mandates, professional development, quality assurance mechanisms, and technical investment.

    What to keep in mind

    The summary reports a systematic review of existing studies, so the findings depend on the available literature it included. The abstract does not describe study-by-study limitations or whether the reviewed evidence was consistent across all contexts.

    • The review included 36 peer-reviewed studies on OER in higher education.
    • OER were associated with better student engagement, academic performance, and equity.
    • Adoption barriers included faculty resistance, limited awareness, infrastructure gaps, fragmented repositories, and policy deficiencies.
    • The review says implementation works best with institutional mandates, professional development, quality assurance, and technical investment.
    • The authors frame OER as part of an inclusive, sustainable, innovation-driven higher education ecosystem.

  • Sustainability influenced apparel choices, but barriers remained

    What the study found

    The study found that sustainability did influence apparel pre-purchase decision-making for some consumers, but not in the same way for all age groups. It also found different value orientations among older and younger consumers, including mindful consumption in both groups.

    Why the authors say this matters

    The authors conclude that the findings help explain the sustainability perspective in apparel buying and the value orientations guiding Indian consumers. They also say the study provides recommendations for global apparel brands and draws parallels with Schwartz’s Value Theory, which is a framework for describing human values.

    What the researchers tested

    The researchers conducted a qualitative study using in-depth interviews about the apparel pre-purchase stage. They examined how consumers evaluated alternatives, including eco-friendly and recyclable materials and brands with sustainability initiatives, using purposive and snowball sampling in an urban city in India. Content analysis was used to generate first-order concepts.

    What worked and what didn't

    Values of mindful consumption were found in both older and younger cohorts. Family value influence was reported by the younger cohort, while social responsibility was found in the older cohort. The younger cohort also used alternatives such as renting, borrowing, and thrifting, and was more price sensitive; barriers included lack of awareness, economic considerations, a materialistic mindset, and personal inhibitions. Consumers generally had a positive perception of brands’ sustainability initiatives, although some younger consumers were sceptical.

    What to keep in mind

    The study used a qualitative design and drew on interviews with consumers from one urban city in India, so the findings are based on that sample and setting. The abstract does not describe additional limitations.

    • Sustainability influenced apparel pre-purchase decisions, but not uniformly across age groups.
    • Older and younger consumers both showed mindful consumption values.
    • Younger consumers reported family value influence and were more price sensitive.
    • Older consumers reported social responsibility as a guiding value.
    • Barriers included low awareness, economic concerns, materialistic thinking, and personal inhibitions.
    • Most consumers viewed brands’ sustainability initiatives positively, though some younger consumers were sceptical.