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Articles by Wei Lyu
Computer Science > Machine Learning
Brain signal decoding is challenging because neural recordings are noisy and vary across individuals, while labeled data are often limited. Recent attention-based models on the symmetric positive definite (SPD) manifold have nevertheless achieved strong performance using covariance and connectivity representations, yet the contribution of learned token weighting remains unclear.
Human mobility dynamics for cost-effective flood emergency resource allocation
Abstract Extreme flooding displaces millions of people annually worldwide. However, emergency resources are often inefficiently allocated, as conventional strategies usually overlook mobility dynamics and thereby exacerbate vulnerability. Here, by capturing flood-induced human dynamics using agent-based modelling, we investigate the emergency resource allocation issue (official emergency shelters and dual-use public service facilities) across China’s 21 large cities.
Effects of anchor characteristics and product attributes on consumer purchase decisions in live streaming sales: evidence from an eye-tracking study
Abstract As live streaming sales have become a significant model in e-commerce, a critical scientific question arises: how should the characteristics of anchor combinations be matched with product attributes to enhance consumers’ purchase intention? Based on a 5 × 2 × 2 experimental design, this study investigates the interactive effects of anchor combination mode (single male, single female, male pair, female pair, mixed-gender pair), product type (search-based vs.
Crack-free, partial-ring cladding surface waveguides in sapphire fabricated by femtosecond laser direct inscription
Femtosecond laser direct writing is highly effective for fabricating three-dimensional photonic waveguides deep inside ultra-hard crystals. Extending this capability to the surface realm, where waveguides interact directly with the sample interface, has been challenging due to pronounced susceptibility to structural cracking. To address this, we introduce a strategy that avoids direct laser modification of fragile crystal–air interfaces.
Study on the anti-inflammatory effects and mechanisms of gentisic acid based on the LPS-induced RAW264.7 cell inflammation model and the oxazolone-induced zebrafish inflammation model
Abstract Background: Gentisic acid (GA), a natural polyphenolic compound, possesses significant anti-inflammatory activity, but its molecular mechanism, particularly its association with the intestinal microbiota and specific signaling pathways, remains unclear. Purpose: In this study, we aimed to clarify anti-inflammatory targets, pathways and mechanism of GA using network pharmacology, in vitro and in vivo experiments, and microbiome analysis.
Neuroergonomic evaluation of risk-warning eHMI penetration rates in vehicle platoons: effects on pedestrians’ mental workload, situation awareness, and gap acceptance
Abstract The deployment of Level 4–5 autonomous vehicles (AVs) in real traffic environments presents significant challenges for pedestrian interaction, primarily due to the absence of human driver cues. To address this limitation, risk-warning external human–machine interfaces (eHMIs), which communicate dynamic crossing risks based on the AV’s time-to-arrival (TTA), have received growing attention.
High‐Brightness, Wide‐Gamut, and High‐Resolution Structural Colors via Ultrafast Laser Oxidation of Ti/TiO2 Films
1 Introduction Structural colors, originating from the interaction between visible light and micro/nanostructures, differ from pigment-based colors by relying on interference rather than absorption [1-9]. They are abundant in nature (e.g., butterfly wings, peacock feathers, seashells) and have inspired artificial platforms such as plasmonic nanostructures [10-14], Mie resonators [15], Fabry–Pérot cavities [16-19], dielectric multilayers [20-24], and metasurfaces [25-27].
Children’s oral health care use and oral health in the United States after the COVID-19 pandemic
Key Words Oral health care access oral health care use oral health pediatric dentistry SARS-CoV-2 Abbreviation Key NSCH (National Survey of Children’s Health) pp (Percentage point) Get full text access Log in, subscribe or purchase for full access. References 1. Choi, S.E. ∙ Mo, E. ∙ Sima, C. ... Impact of COVID-19 on dental care utilization and oral health conditions in the United States JDR Clin Transl Res. 2024; 9:256-264 2. Alpert, E. ∙ Fox, K. ∙ Zakir, S. ...
Effects of Medicaid Coverage on Work: Evidence From Extending Postpartum Medicaid Coverage
What is known on this topic? ○ Several states and the federal government have added work requirements to maintain eligibility of adult beneficiaries for Medicaid due to concerns about disincentives to work. ○ Work requirements have not applied to pregnancy or postpartum Medicaid eligibility or parents of young children, but whether Medicaid affects work for those groups is not well known.
The Effect of Family Income on Children’s Academic Achievement
There is a well-established positive association between family income and children’s test scores in math and reading. One study found that US children from families in the top 10 percent of the income distribution had test scores approximately one standard deviation higher than children from families in the bottom 10 percent, and this difference has grown in recent decades.
Effects of Continuous Medicaid Coverage in 2020-2023 on Children's Health Insurance Coverage, Access to Care, Health Services Use by Type, and Health Status - Lyu - Health Services Research - Wiley Online Library
What is known on this topic ○ Coverage gaps among children have been associated with disruptions to sources of care, decreased use of preventive services, increased unmet care needs, emergency department visits, and potentially avoidable hospitalizations. ○ The Families First Coronavirus Response Act (FFCRA) prohibited states from disenrolling Medicaid beneficiaries through March 2023, which offered continuous coverage to three years.
Expansion of the Earned Income Tax Credit for Young Adults in 2021 and Mental Health of US Home Renters | AJPH | Vol. Issue
Objectives. To evaluate the impact of the temporary expansion of the Earned Income Tax Credit (EITC) for childless adults in 2021 on the mental health of home renters and homeowners. Methods. We used US Behavioral Risk Factor Surveillance System data from 2021 through 2023. Mental health outcomes included the number of mentally unhealthy days in the past 30 days and an indicator for frequent mental distress (14 or more unhealthy days).
HIV low-level viremia is not related to subsequent virological failure
Back to Journals » Infection and Drug Resistance » Volume 18 Authors Duan X , Song X, Lyu W, Li Y, Tang J, Cao W, Han Y, Li T Received 11 May 2025 Accepted for publication 14 August 2025 Published 27 August 2025 Volume 2025:18 Pages 4373—4384 DOI https://doi.org/10.2147/IDR.S533871 Checked for plagiarism Yes Review by Single anonymous peer review Peer reviewer comments 2 Editor who approved publication: Professor Chi H.
Birth Outcomes and Prenatal Care Use in the U.S. During the COVID‐19 Pandemic in 2020 and 2021
George L. Wehby Department of Health Management and Policy, University of Iowa, Iowa City, Iowa, USA Department of Economics, University of Iowa, Iowa City, Iowa, USA Department of Preventive and Community Dentistry, University of Iowa, Iowa City, Iowa, USA Public Policy Center, University of Iowa, Iowa City, Iowa, USA National Bureau of Economic Research, Cambridge, Massachusetts, USA Search for more papers by this author
Conjugated Microporous Polymers‐Based Catalytic Membranes with Hierarchical Channels for High‐Throughput Removal of Micropollutants
1 Introduction In the contemporary era, the persistence and accumulation of emerging trace organic pollutants within the aquatic ecosystem, encompassing endocrine-disrupting chemicals, antibiotics, pharmaceuticals, personal care products, and pesticides, pose a substantial threat to both human health and environmental systems.[1] Nevertheless, these minute contaminants have been proved to be formidable challenges when attempting their removal from water using conventional biological methods,...
Nanofibrous Porous Organic Polymers and Their Derivatives: From Synthesis to Applications
1 Introduction Recently there has been a notable surge in the exploration of porous materials, encompassing zeolites, activated carbon, mesoporous silica, metal-organic frameworks, porous organic polymers (POPs) and more.
Selenium treatment towards enhanced cyclic stability for single-crystal Ni-rich cathode at ultra-high voltage of 4.7 V
The nickel-rich single-crystal cathode materials LiNixCoyMn1-x-yO2 (NCM, x ≥ 0.6) have received extensive attentions for Li-ion batteries (LIBs), due to their benefits in terms of structure stability and long-circular-life (vs traditional polycrystalline secondary sphere). Contributed by their advantages, the percentage of single-crystal cathode applications in electric vehicles has constantly increased [1], [2], [3].
Understanding the influence of sulfur configuration on the electrochemical reaction pathway for lithium storage in molybdenum sulfides
Advanced batteries, characterized by high energy and power densities, long-lasting cycling capabilities, lightweight design, and cost-effectiveness, are becoming increasingly indispensable for the future electric vehicles and large-scale grid energy storages [1], [2], [3], [4], [5]. While graphite has conventionally served as a popular anode material due to its remarkable cycling stability, it presents a drawback in terms of limited theoretical capacity (372 mAh/g, C6 + Li+ + e− ↔ LiC6) [6], [7].
Changes in Children's Health Care Access and Utilization in the United States in the First Two Years of the COVID-19 Pandemic
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Quinoa Ameliorates Hepatic Steatosis, Oxidative Stress, Inflammation and Regulates the Gut Microbiota in Nonalcoholic Fatty Liver Disease Rats
Abstract : A long-term high-fat diet causes hepatic steatosis, which further leads to oxidative stress and inflammation. In this study, we firstly investigated the regulation effects of different amounts of quinoa on hepatic steatosis, oxidative stress, and inflammation of rats fed a high-fat diet, then the gut microbiota was dynamically determined.
Nanomotion of Micro-Objects Driven by Light-Induced Elastic Waves on Solid Interfaces
Abstract It has been recently reported that elastic waves induced by nanosecond light pulses can be used to drive nanomotion of micro-objects on frictional solid interfaces, a challenging task for traditional techniques using tiny optical force. In this technique, the main physical quantities and parameters involved are temporal width and energy of light pulses, thermal heating and cooling time, friction force, and elastic waves.
The effects of Medicaid expansions on dental services at federally qualified health centers
US Department of Health Human Services. Institute of Medicine, National Research Council Improving Access to Oral Health Care for Vulnerable and Underserved Populations. National Academies Press, 2012 National Institutes of Health Oral Health in America: Advances and Challenges. US Department of Health and Human Services, National Institute of Dental and Craniofacial Research, 2021 The impact of Medicaid insurance coverage on dental service use. J Health Econ.
Compact High-Resolution Absolute-Gravity Gradiometer Based on Atom Interferometers
Abstract We present a compact high-resolution absolute-gravity gradiometer based on dual 85Rb atom interferometers using stimulated Raman transitions. A baseline of L=44.5 cm and an interrogation time of T=130 ms are realized in a sensor head with a volume of only 95 l. Many experimental parameters are optimized to improve the short-term sensitivity, whereas interleaving measurements by reversing the direction of the Raman wave vector are implemented to improve the long-term stability.
Effects of the COVID-19 Pandemic on Children’s Oral Health and Dental Care Use
This paper is only available as a PDF. To read, Please Download here. Background The Coronavirus Disease 2019 (COVID-19) pandemic led to early restrictions on access to dental care and social distancing requirements. This study examines the early effects of the COVID-19 pandemic on children’s oral health and access to dental care in the United States.
Shelter-In-Place Orders Reduced COVID-19 Mortality And Reduced The Rate Of Growth In Hospitalizations
The coronavirus disease 2019 (COVID-19) pandemic has placed unprecedented pressure on governments to mitigate its spread.
Comparison of Estimated Rates of Coronavirus Disease 2019 (COVID-19) in Border Counties in Iowa Without a Stay-at-Home Order and Border Counties in Illinois With a Stay-at-Home Order | Law and Medicine | JAMA Network Open | JAMA Network
Key Points español 中文 (chinese) Question Was the stay-at-home order in Illinois associated with different rates of coronavirus disease 2019 (COVID-19) compared with Iowa, which did not issue a stay-at-home order?
Shelter-In-Place Orders Reduced COVID-19 Mortality And Reduced The Rate Of Growth In Hospitalizations
The coronavirus disease 2019 (COVID-19) pandemic has placed unprecedented pressure on governments to mitigate its spread.
Effects of the Minimum Wage on Child Health
The study was funded by a Policies-For-Action (P4A) grant from the Robert Wood Johnson Foundation (RWJF). The authors thank Jason Fletcher, David Simon, Hope Corman, and seminar participants at the RWJF P4A research webinar, at the Federal Reserve Bank of Boston (New England Studies Group), University of Chicago, and at Hunter College, City University of New York for providing helpful comments on the paper.
Children's Oral Health and Academic Performance: Evidence of a Persisting Relationship Over the Last Decade in the United States
Article in Press Carol Cristina Guarnizo-Herreño x Search for articles by this author Affiliations Departamento de Salud Colectiva, Facultad de Odontología, Universidad Nacional de Colombia, Bogotá, Colombia Department of Epidemiology and Public Health, University College London, London, United Kingdom , DDS, PhD 1,2 , Wei Lyu , MS 3 , George L.
Solvent-dependent carbon dots and their applications in detection of water in organic solvents
In this study, solvent-dependent emitting carbon dots (CDs) were synthesized by simple one-step hydrothermal treatment of o-phenylenediamine (oPD). The as-prepared carbon dots (o-CDs) exhibited multi-color emission and strict excitation-independent luminescent characteristics in different solvents. Moreover, multi-color emissive o-CDs/polymer films were achieved through integrating the o-CDs with different polymer matrices.
An addressable packing parameter approach for reversibly tuning the assembly of oligo(aniline)-based supra-amphiphiles
We present a newly developed approach to non-covalently address the packing parameter of an electroactive amphiphile. The pH-responsive reversible switching of a tetra(aniline)-based cationic amphiphile, TANI-pentyl trimethylammonium bromide (TANI-PTAB), between self-assembled vesicles and nanowires by acid/base chemistry in aqueous solution is used to exemplify this approach.
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