Wednesday, March 12, 2025

 

Pandemic dental office closures linked to increased burden on ERs from kids with dental issues

During the COVID-19 pandemic coincided with a surge in hospital visits for dental conditions among Medicaid-insured children




New York University





Dental office closures early in the COVID-19 pandemic were associated with a 62-percent increase in the share of emergency department visits from toothaches, abscesses, and other painful dental issues among children covered by Medicaid, according to a new study led by researchers at NYU College of Dentistry.

The findings, published in the Journal of the American College of Emergency Physicians Open, suggest that families with young kids have difficulty accessing dental care during public health crises, which may further stress overburdened hospitals.

In March 2020, as COVID-19 cases grew exponentially in New York and around the country, public health measures to stop the virus’s spread prompted the closure of dental offices. While dentists could see patients for emergency appointments, all other routine dental care was postponed.

At the same time, hospitals were filling up with critically ill patients. NYU researchers wanted to understand whether patients with urgent dental issues were also ending up in emergency rooms.

“Emergency departments are not well equipped to treat dental conditions, as they are typically limited to relieving pain and referring patients to dentists to address the underlying issues,” said Shulamite Huang, a health economist and assistant professor of epidemiology and health promotion at NYU College of Dentistry. “As a result, visiting an emergency department for tooth pain can be a waste of health care system resources—resources that are in short supply during times of crisis, including the peak of the COVID-19 pandemic.”

Huang and her colleagues examined Medicaid claims data for children under the age of 19 across New York State to determine if there were any differences in emergency department visits for dental concerns before the pandemic (in 2018 and 2019) versus 2020. They focused on issues including cavities, infections, and abscesses, and excluded injuries such as cracked or knocked-out teeth.

The researchers found that denta practice closures from March through May 2020 led to a 62- percent increase in the share of children’s emergency room visits from non-traumatic dental issues over 2019 levels (from 3.7 percent of ER visits focusing on dental issues in 2019 to 6 percent in 2020). This surge in visits was the most pronounced among young children up to age 9, who were seen in emergency departments for dental issues twice as often during this period compared to the previous year.

Notably, the increase in emergency department visits was sustained even after many dentists reopened their offices in May 2020, although to a lesser degree.

“The sizable changes in the emergency department dental care of very young children suggests that this population was likely to fall through holes in the dental safety net,” said Huang. “Although dentists were allowed to treat dental emergencies, Medicaid-insured children may have had difficulty accessing care during the initial phase of the COVID-19 pandemic.”

The authors cite several possible reasons for this, including parents having difficulty determining whether kids in pain are experiencing a true emergency. In addition, very young children covered by Medicaid may not have established care with a dentist before the pandemic, as finding a dentist that accepts Medicaid and treats young children can be a challenge.

In preparation for future pandemics or other crises that stress US hospitals, the researchers encourage health systems to consider options for emergency dental care that can divert patients from the emergency department, including offering limited hospital-based dental services or incorporating urgent dental care clinics within hospitals. In addition, ensuring that children covered by Medicaid have access to a dentist in their community may both prevent painful dental issues and provide them with emergency dental care when needed.

Additional study authors include Scarlett Wang of the NYU Wagner Graduate School of Public Service and Heather Gold of NYU Grossman School of Medicine. This research was supported by the National Institute of Dental and Craniofacial Research (K25 DE028584 and K25 DE028584-02S1). 

 

Over 1 in 3 adults in households with guns do not store all in locked locations








Annenberg Public Policy Center of the University of Pennsylvania

Guns in U.S. households 

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Guns in households, by age groups. Source: Annenberg Public Policy Center's ASAPH survey, February 2025.

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Credit: Annenberg Public Policy Center




PHILADELPHIA – Since 2017, firearm-related injuries in the United States have been the most common cause of death from injury among children through young adults, ages 1 to 24, surpassing motor vehicle accidents, according to a 2022 study. Access to firearms in one’s home increases the risk of suicide and accidental death.

But over a third of Americans with guns in their homes say they do not store all of them in a locked location (37%), according to the latest health survey from the Annenberg Public Policy Center (APPC) of the University of Pennsylvania. (Download the topline.)

In the survey, conducted Jan. 30-Feb. 10, 2025, among more than 1,700 U.S. adults, over a third of respondents (37%) report having one or more guns in their household. Of them, nearly 3 in 4 (74%) report having more than one gun in their household. Respondents aged 50 and older are more likely to be in a household with guns than those who are 18 to 49 years old.

There are party differences among those who report living in gun households: 50% of self-described Republicans and Republican-leaning independents report being in a household with one or more guns. Just 28% of self-described Democrats and Democrat-leaners report living in a household with guns, as do 31% of those who are non-leaning independents or in neither the Democratic nor Republican parties. Importantly, among households with guns, there are no significant differences in reported gun storage by political affiliation or the lack thereof. (See Q57A (a) in the topline.)

Among the people who report having one or more guns in their household, just 61% say “all of them” are stored in a locked place and 20% say “none of them” are in a locked place. Another 17% report that “a few” or “most of them” are in a locked place.

Respondents who are 18 to 49 years old – the ages of individuals who are more likely to have children or teens at home – are more likely than those in the older groups to report either having no guns or that all guns in their household are stored in a locked place (89-91% vs. 78-79%). Also, individuals under 50 who live in households with guns are less likely than the older groups to report that not all of them are stored in a locked place (8-10% vs. 19-20%).

“One can disagree about the advisability of having guns at home,” said Kathleen Hall Jamieson, director of the Annenberg Public Policy Center. “But since secure storage minimizes inadvertent use, child access, and gun theft, we all should consider it part of responsible gun ownership.”  

APPC’s Annenberg Science and Public Health knowledge survey

The survey data come from the 23rd wave of a nationally representative panel of 1,716 U.S. adults conducted for the Annenberg Public Policy Center by SSRS, an independent market research company. Most have been empaneled since April 2021. To account for attrition, small replenishment samples have been added over time using a random probability sampling design.  The most recent replenishment, in September 2024, added 360 respondents to the sample. This wave of the Annenberg Science and Public Health Knowledge (ASAPH) survey was fielded Jan. 30-Feb. 10, 2025. The margin of sampling error (MOE) is ± 3.4 percentage points at the 95% confidence level. All figures are rounded to the nearest whole number and may not add to 100%. Combined subcategories may not add to totals in the topline and text due to rounding.

Download the topline and the methods report.

The policy center has been tracking the American public’s knowledge, beliefs, and behaviors regarding vaccination, Covid-19, flu, RSV, and other consequential health issues through this survey panel for nearly four years. In addition to Jamieson, APPC’s team on the survey includes research analysts Laura A. Gibson and Shawn Patterson Jr., Patrick E. Jamieson, director of the Annenberg Health and Risk Communication Institute, and Ken Winneg, managing director of survey research

See other recent Annenberg health knowledge surveys:

The Annenberg Public Policy Center was established in 1993 to educate the public and policy makers about communication’s role in advancing public understanding of political, science, and health issues at the local, state, and federal levels.

  

Survey respondents 18 to 49 years old – the age of individuals more likely to have children or teens at home – are more likely than older respondents to say they either have no guns in their household or that all guns in their household are stored in a locked place (89-91% vs. 78-79%). Source: Annenberg Public Policy Center's ASAPH survey, February 2025.

Credit

Annenberg Public Policy Center

 

Climate-driven model transfer of crop classification boosts global crop mapping





Journal of Remote Sensing

Geographic locations of the four study areas and growth calendars of the target crops in each study area. 

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Geographic locations of the four study areas and growth calendars of the target crops in each study area.

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Credit: Journal of Remote Sensing




In a pioneering study, researchers from China Agricultural University have introduced ClimID-UDA, an unsupervised domain adaptation method that uses climate indicators to significantly improve crop classification across regions and years. By correcting spectral discrepancies in satellite image time series (SITS), the method enhances the accuracy of crop mapping without requiring ground truth from new regions, offering a scalable solution for global agricultural monitoring.

Accurate crop classification is essential for agricultural management, policy-making, and insurance. Achieving accuracy crop classification in areas with ground truth is straightforward while producing accurate crop maps in unlabeled areas is challenging. Model transfer provides a solution for crop classification in unlabeled areas. However spectral discrepancies in satellite images, caused by varying climatic conditions across regions, pose significant challenges for model transfer. These discrepancies often hinder the effectiveness of models trained in one region when applied to others. Addressing these challenges, researchers have long sought methods that can adapt models to new regions without the need for additional labeled data.

Published (DOI: 10.34133/remotesensing.0439) in Journal of Remote Sensing on March 6, 2025, the Unsupervised Domain Adaptation method based on the Climate Indicator Discrepancy (ClimID-UDA) method introduces a novel approach to cross-regional crop classification. By utilizing climate indicator discrepancies to correct spectral discrepancies in SITS, this technology enables crop classification models trained in well-studied regions to be transferred to unlabeled areas. This significantly reduces the need for costly field surveys and boosts the scalability of agricultural monitoring efforts across diverse geographical regions.

The core innovation of ClimID-UDA lies in the use of Climate Indicator Discrepancy (ClimID) to correct the SITS shift. By calculating climate variables representing light, heat, water, and pressure, the researchers developed a Climate Indicator (ClimI) that helps correct SITS in target regions. The method was tested across multiple regions, sensors, and years, demonstrating an average accuracy improvement of over 11%. In some cases, classification accuracy saw an increase of up to 20%. Crucially, ClimID-UDA does not require ground truth in the target region, making it highly adaptable and scalable across different climates and crop types.

"This method bridges the gap between climate variability and crop spectral signatures, allowing for more accurate and scalable crop classification," said Dr. Yuanyuan Zhao, a lead researcher on the project. "ClimID-UDA has the potential to revolutionize agricultural monitoring, especially in regions where ground truth is scarce. It opens up new possibilities for more efficient global agricultural management."

The study utilized satellite imagery from Sentinel-2 and GF-1, combined with climate data from the ERA5-Land dataset. The researchers, leveraging the self-developed grid system within their research group, successfully achieved efficient image processing and rapid calculation of ClimI. By using various ClimI algorithms, combinations of climate variables, and cumulative days of climate variables, they calculated ClimI that can describe regional climate changes, thus enabling the transfer of classification models across different climate conditions.

The potential applications of ClimID-UDA are vast. By reducing the reliance on labeled data, the method could revolutionize global agricultural monitoring, particularly in areas with limited ground truth availability. Future applications could include real-time crop monitoring, yield prediction, and disaster assessment. Additionally, researchers are exploring ways to integrate other environmental factors, such as soil conditions, to further enhance the ClimID-UDA precision and applicability.

ClimID-UDA represents a significant step forward in crop classification, offering a scalable and cost-effective solution to one of agriculture's most pressing challenges. With its potential to transform how we monitor and manage agricultural resources, this method could be a game-changer for farmers, policymakers, and agribusinesses worldwide.

###

References

DOI

10.34133/remotesensing.0439

Original Source URL

https://spj.science.org/doi/10.34133/remotesensing.0439

Funding information

This work was supported in part by in part by the National Key Research and Development Program of China (Grant 2022YFB3903500)

About Journal of Remote Sensing

The Journal of Remote Sensingan online-only Open Access journal published in association with AIR-CAS, promotes the theory, science, and technology of remote sensing, as well as interdisciplinary research within earth and information science.

 

PolyU unveils comprehensive zeolite structures, advancing development of catalysts for petrochemical and renewable energy




The Hong Kong Polytechnic University
PolyU unveils comprehensive zeolite structures, advancing development of catalysts for petrochemical and renewable energy 

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A PolyU research team from the Department of Applied Biology and Chemical Technology has successfully mapped the precise locations of individual and paired aluminium atoms in the zeolite framework. Pictured are Prof. Benedict Lo, Associate Professor (right); and Dr Guangchao Li, Research Assistant Professor (left), alongside the only SSNMR facility in Hong Kong, which is installed at PolyU.

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Credit: © 2025 Research and Innovation Office, The Hong Kong Polytechnic University. All Rights Reserved.




Zeolites, crystalline materials widely used in the petrochemical industry, serve as pivotal catalysts in the production of fine chemicals, with aluminium being the source of active sites within zeolite structures. A research team from The Hong Kong Polytechnic University (PolyU) has revealed the precise location of aluminium atoms in the zeolite framework. This discovery could facilitate the design of more efficient and stable catalysts, aimed at increasing the yield of petrochemical products, achieving efficient renewable energy storage, and controlling air pollution. This advancement will further promote the application of zeolites in relevant fields. The findings have been published in the international journal Science.

The research is led by Prof. Shik Chi Edman TSANG, Chair Professor of Catalysis and Materials of the PolyU Department of Applied Biology and Chemical Technology. He is joined by Prof. Tsz Woon Benedict LO, Associate Professor, along with first author Dr Guangchao LI, Research Assistant Professor, both from the same department. The team collaborated with researchers from the University of Oxford and the Innovation Academy for Precision Measurement Science and Technology of the Chinese Academy of Sciences.

The unique properties of zeolites, characterised by their well-defined microporous structure, high surface area, and tuneable acidity and basicity, make them indispensable in petrochemical refining, environmental catalysis and fine chemical synthesis. The distribution of substitutional aluminium atoms within the zeolite framework influences the geometry of molecular adsorbates, catalytic activity, and shape and size selectivity. However, accurately locating these aluminium atoms and understanding their impact on the catalytic behaviour of zeolites has posed challenges for the scientific community for decades.

In their research, the team focused on both lab-synthesised and commercial H-ZSM-5 zeolites to bridge the gap between fundamental research and practical application, optimising H-ZSM-5 for advanced catalytic processes. Notably, the team introduced an innovative approach that integrates synchrotron resonant soft X-ray diffraction — a powerful tool for studying atomic structure — with probe-assisted solid-state nuclear magnetic resonance (SSNMR) and molecular adsorption methods. This integration revealed the interactions of molecules at the active sites of aluminium atoms. Ultimately, the team has achieved a breakthrough in locating single and pairs of aluminium atoms in a commercial H-ZSM-5 zeolite.

The research findings will facilitate the development of more efficient and selective catalysts, which have wide-reaching implications beyond petrochemicals, offering potential benefits for industries such as renewable energy and pollution control. Reducing energy consumption, this can, in turn, promote sustainability and minimises environmental impact. With regard to petrochemical refining, these catalysts can improve fuel yield and quality, particularly for products like gasoline and olefins, simultaneously lowering energy usage. In the realm of environmental catalysis, they contribute to cleaner air and mitigating air pollution. For renewable energy and biofuels, these innovations advance hydrogen storage and utilisation processes, which are crucial for the development of a hydrogen economy.

Prof. Edman Tsang said, “This discovery is a game-changer as it precisely identifies the location of aluminium atoms in the zeolite framework and how they are positioned, providing for the first time a structural elucidation of zeolite frameworks. This breakthrough allows scientists to design more efficient and targeted zeolite catalysts, making the chemical process faster, more energy-efficient and more environmentally friendly.”

Prof. Benedict Lo said, “We explored and combined various techniques to achieve a multidimensional view of the distribution of aluminium atoms and their interaction with adsorbed molecules, leading to insights into crucial reaction mechanisms. This provides scientists with a deeper understanding of the structure of zeolites.”

Dr Guangchao Li said, “We will develop further novel synthesis methods to precisely control the distribution and concentration of aluminium atoms, as well as their pore architectures in zeolites. This advancement will enable the design of catalysts with optimised activity, selectivity and stability for specific industrial applications.”

Looking ahead, the team will work closely with industry partners to translate research outcomes into commercial applications. By leveraging the extensive networks and research strengths of the PolyU-Daya Bay Technology and Innovation Research Institute, which focuses on green chemistry and sustainable catalysis, the team will collaborate with domestic petrochemical companies to promote translational research and accelerate the commercialisation of advanced zeolite catalysts. This effort is bolstered by state-of-the-art PolyU facilities, including the only SSNMR facility in Hong Kong and the soon to be introduced first Dynamic Nuclear Polarisation SSNMR (DNP-SSNMR) spectrometer in the Greater Bay Area and southern China. These resources strengthen the team’s research capabilities and facilitate the advancement of their research efforts.