Researchers evaluated the fracture toughness of Si3N4/S45C joints with interface cracks of different lengths. The specimen with a 4mm crack exhibited higher apparent fracture toughness due to reduced residual stress. Fracture propagation directions varied depending on crack length.
Researchers found that human-created barriers and sea level rise trapped plants in a small zone, altering plant populations and dune structures. The loss of critical late-succession species threatens dune formation and habitat for endangered animals like the Kemp's ridley sea turtle.
Researchers found that small oyster shell reefs are effective in slowing erosion on low wave energy shorelines, but less effective in higher wave energy environments. This study suggests that oyster reefs could be a useful tool for coastal managers to stabilize shorelines under low energy conditions.
Invasive plant species infest US public land, costing Americans $34.7 billion annually. Researchers will discuss control strategies using online data and Exotic Plant Management Teams.
Cholesterol crystals can expand and burst in arteries, triggering a natural clotting process that shuts down the artery. This discovery adds another dimension to the inflammation theory, suggesting that the crystallization of cholesterol is a key factor in cardiovascular disease.
Researchers at Salk Institute demonstrate that telomere length does not dictate aging and lifespan, contradicting previous assumptions. They found that non-dividing cells, such as nerve cells, play a crucial role in aging, and targeting telomeres alone is insufficient to prevent accelerated aging.
A recent study by Stanford University researchers reveals a complex 'biogeochemical patchwork' of high and low nutrient availability in tropical soils. The study predicts that only about 17% of the landscape is nutrient-poor, with slopes and valley bottoms often as fertile as the most verdant forests.
A study by Cornell University professor David Pimentel found that organic farming systems produce the same crop yields as conventional farming, while using less energy and conserving more water. Organic farming also improves soil quality and reduces pollution.
A recent study using 'ecological footprint' accounting found that the US benefits from using fuel ethanol do not outweigh its significant environmental impacts. The research suggests that relying on ethanol to fuel the automobile fleet would require enormous areas of corn agriculture, outweighing any potential energy gains.
The new Web-based modules, developed by COMET, will acquaint forecasters with the physics behind rip currents and help them use wind and wave forecasts to produce outlooks of rip-current risk. The modules include animated depictions of rip-current evolution in three dimensions.
A new study models phosphorus loading into Lake Mendota, finding that the buildup of phosphorus in soils is likely to be the source of serious chronic environmental problems for hundreds of years. The research suggests that restoring water quality is unlikely unless soil erosion is greatly reduced and new technologies are developed.
Researchers studied the La Jolla submarine canyon's effect on ocean waves, finding that up to 60% of wave energy was reflected back into the open ocean. Another study tracked sulfur hexafluoride through the Denmark Strait to understand its role in driving global climate.
The study found that freshwater mussel populations declined gradually between 5000 and 1000 years ago, but accelerated after large-scale maize cultivation started. This suggests human activities like land clearing have measurable effects on aquatic ecosystems.
A new website, CCIR-NY, offers scientific answers to basic questions about climate change and its impact on New York City. The site provides information on potential flooding of transportation infrastructure, saltwater intrusion into water supplies, and erosion of public beaches.
Researchers from Columbia University and NASA used sediment layers to uncover a 500-year drought from 800 A.D. to 1300 A.D., as well as the effects of the Little Ice Age and European settlers' agricultural practices on the area's climate. The study found increased erosion, saltier water, and changes in vegetation during these periods.
Researchers in Nepal have identified a previously unknown fault that confirms intuition about deformation at depth in the Earth's crust. The discovery suggests a feedback mechanism between erosion and tectonic deformation, with implications for understanding mountain building processes.
Researchers discovered minimum melting conditions on early Earth, 200 million years after solar system formation, using a new zircon thermometer technique. This finding provides important information about the first eon of Earth's history and opens up possibilities for life's early foothold.
A group of 25 scientists has developed a comprehensive database of 37,099 river restoration projects to draw conclusions about regional and national trends in project numbers, costs, and environmental benefits. The study highlights the need for further research on the environmental effects of different restoration practices.
The river restoration field has matured into a science, with the nation's first comprehensive database of projects documenting trends and progress. Key findings include exponential growth in restoration efforts, with $14-15 billion invested since 1990, and a need for consistent monitoring to improve future efforts.
Researchers from eight universities and conservation groups compiled a comprehensive database on nationwide river restoration projects, analyzing over 37,000 current projects. The study found that most projects were implemented in the Pacific Northwest or Chesapeake Bay watershed and had median costs of $57,000 in Georgia.
A new study published in Nature suggests a connection between erosion rates and tectonic forces in the Himalaya region of Nepal. Researchers found that erosion rates increase significantly at the base of steep mountains, potentially influencing global climate change.
Researchers Drs. Melanie Vile and David Velinsky are studying the effects of sea level rise and saltwater intrusion on tidal marsh ecosystem services in the Delaware Estuary. Tidal marshes provide crucial functions such as storm buffering, shoreline stabilization, and fish nursery habitats.
Researchers propose alternative explanation for fault formation at mid-ocean ridges, citing role of magma and rotation of faults. The study suggests that large offset 'oceanic core complex' faults may form due to bending of lithosphere, contradicting the previous standard model.
Satellite images help model sediment transport in New Caledonia's southwest lagoon, providing a three-dimensional picture of the process. The combined use of remote sensing and numerical models refines predictions of erosion rates and improves precision.
Researchers have identified a novel protein, MKRN1, that regulates telomerase activity and maintains cellular telomere lengths. Increasing MKRN1 levels in cells promotes the degradation of telomerase enzyme hTERT, leading to decreased telomerase activity and shorter telomeres.
A recent study found that academic medical centers use emotional appeals and promote unproven services to attract patients, raising concerns about the erosion of public trust. The researchers recommend that centers reexamine their advertising procedures to promote evidence-based services.
Researchers used historical photographs to analyze landscape change over time, finding that erosion is linked to clearing trees from hill slopes. Additionally, they found that riparian zones along rivers and streams have improved significantly over the past 30 years.
The PLMS system provides instant feedback on alternative grazing systems' impact on farm profit, milk production, and greenhouse gas emissions. A multidisciplinary team is developing the system to balance forage needs with livestock requirements.
The Cassini mission has captured high-resolution images of Titan, revealing a geologically young surface with signs of tectonic resurfacing and erosion by liquid hydrocarbons. The surface features complex patterns, including channels and linear boundaries, indicating ongoing geological processes.
Researchers analyzed historical photographs to understand human-landscape interaction, revealing a link between tree clearing and erosion. The study found that riparian zones have improved over the past 30 years, benefiting stream health and ecosystem health.
Agriculture can provide food and energy security while sustaining soil and water resources, says Kansas State University professor Charles W. Rice. Properly managed agricultural systems can conserve soil and water, but excessive tillage, low productivity, and residue removal result in loss of biodiversity and environmental degradation.
The Caries Assessment and Risk Evaluation (CARE) test measures saliva's oligosaccharides to predict future cavity history with 98% confidence. The test identifies children at risk, allowing for preventive measures to be taken.
States are finding alternative routes to expand health insurance coverage, including new revenue sources and private-sector partnerships. Medicaid's role is being reevaluated to make programs more affordable and sustainable, with a focus on addressing underlying cost increases and increasing access for vulnerable populations.
The study investigates how people navigate risk and uncertainty in their personal lives, relationships, and careers. Key findings include the erosion of traditional roles and relationships between men and women, as well as the increasing importance of private responsibilities and public support.
The study models seasonal distribution of BOD and DIN to identify areas at greatest risk for low water quality. Unmanaged shrimp mariculture development leads to increased BOD and DIN, causing oxygen depletion and harming aquatic life.
A NASA study reveals that planting trees on marginal agricultural lands can sequester significant amounts of carbon dioxide, potentially offsetting one-fifth of the US's annual fossil fuel emissions. Additionally, research suggests that insect outbreaks linked to droughts and heat waves may contribute to increased greenhouse gas levels.
A new camera system and software may reveal clues about how ocean currents affect erosion, as well as near-shore phenomena like rip currents. The findings suggest a more complicated picture of water movement than previously thought, requiring researchers to re-examine ideas about beach erosion and repair strategies.
Researchers have discovered the structure of human POT1, a protein that caps the ends of chromosomes and regulates telomere length. The protein binds to a ten-nucleotide sequence, protecting the telomere from erosion, and its structure suggests that telomerase activity is regulated by this complex.
Researchers used MRI to study salt crystallisation in model systems and found that it causes damage in materials with small pores. The study provides new insights into the mechanism behind salt damage in building materials and stones.
Researchers found that human activities, mainly agriculture and construction, cause more soil erosion than all natural processes combined. This situation is particularly critical due to the rapid growth of the Earth's population and widespread land use.
Researchers compared bulk samples from five geological formations with a museum collection, finding that the diversity of mollusks is similar. The study also revealed that shells in museum collections are better preserved due to time, making them an important resource for researchers.
Research highlights the importance of traditional Asian diets and physical activity patterns in preventing chronic illnesses like cancer and diabetes. Experts call for targeted campaigns to promote healthy eating and exercise among low-income immigrant communities.
Researchers at the University of Arizona found that Lehmann lovegrass, an invasive species introduced in the 1930s, remains unchanged despite controlled burns. The study suggests that fire is not effective in reducing the spread of non-native species, forcing land managers to explore alternative methods for controlling the invasive grass.
A new study suggests that droughts like the 1930s Dust Bowl may not be unique to modern times, but were common in prehistoric periods. The research found that ancient droughts persisted for several decades and caused widespread effects on ecosystems, including prairie fires and erosion.
Researchers found that buffelgrass, an invasive non-native species, grabs water before foothill palo verde trees can, ultimately killing them. The grass reduces the available water to trees, exacerbating drought conditions and causing self-pruning, a natural defense mechanism for the trees.
Research by University of Illinois Chicago scientists reveals steady rise in sea level over the past 8,000 years, challenging a hypothesis that sea levels were higher 5,000 years ago. The study uses peat deposits to confirm steady sea level rise and emphasizes the need for better predictions to prepare for coastal erosion.
Researchers analyzed rare isotope data to gauge when rivers abandoned their ancient beds and exposed terraces. The study reveals that rivers cut through bedrock at a rate far more rapid than previously thought, driven by regional climate changes during the last ice age.
Geologist John Hooke estimates that humans move approximately 45 gigatons of soil and rock annually, surpassing the movement of rivers, glaciers, and oceans. This significant displacement has environmental implications, including acid mine drainage and river sedimentation, highlighting the need for sustainable practices.
Changes in land use have implications for disease distribution and human health, with activities like deforestation and urban sprawl contributing to the spread of Lyme disease and malaria. The report calls for policy changes and research investments to address these issues.
Restoring carbon in degraded agricultural soils can significantly improve crop yields and global food security, while reducing greenhouse gas emissions. However, soil has a finite capacity for holding carbon, and widespread adoption of recommended management practices may reach its limits within 50 years.
Researchers found that increasing soil depth and volume leads to increased species occupation and complementary biodiversity effects. The study suggests that intercropping may benefit from deeper soils, but soil erosion could reduce these benefits.
Researchers retrieved clues to ancient ocean chemistry and global greenhouse gas accumulation from 130-million-year-old sediments. The study provides a high-resolution record of seawater sulfate changes, shedding light on the interactions between the Earth's atmosphere, land, and ocean systems during the Cretaceous period.
Researchers say broad body of research shows UV-B radiation can cause severe damage to amphibian species from eggs to adults, including retinal damage and blindness. Amphibian declines are linked to multiple causes, but UV-B remains a significant concern.
Researchers found that glaciers grind down mountains at a rate comparable to tectonic plate movement, validating the 'glacial buzz saw' hypothesis. This suggests that glacial erosion plays a significant role in shaping mountain landscapes and redistributing rock masses.
No-till farming reduces carbon emissions by retaining humus in the soil, preventing erosion and promoting healthy crop production. By adopting no-till practices, farmers can sequester up to 300 million tons of soil carbon annually, potentially delaying the need for fossil fuels.
Alpine tree lines are shifting up-slope due to global warming, threatening regional plant populations. The study suggests that pine trees could help protect drinking water catchments from erosion and pollution in the City of Vienna.
A study comparing French and British pension systems reveals that France's ARRCO organization provides secure pension guarantees through a national umbrella structure. In contrast, the UK's reliance on private sector pensions has led to inadequate protection for women and vulnerable workers.
The Charleston earthworks, built in 1862-1863, are gradually eroding at a rate of about five millimeters a year. Researchers have been documenting the pattern and rate of this degradation to better understand natural hillslope evolution.
A mathematical equation called the Bruun rule is being misused to predict future beach erosion due to its complexity and limited applicability. Experts argue that the rule has never been shown to provide accurate predictions, even under ideal conditions.
The demand for outpatient dental anesthesia and sedation services remains high despite a decline in training programs and an evidence-based foundation. Dr. Raymond Dionne calls for a scientific agenda to develop a safe and effective approach for dental outpatients.