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Total 558 results found since Jan 2013.

Active wing-pitching mechanism in hummingbird escape maneuvers
Previous studies suggested that wing pitching, i.e. the wing rotation around its long axis, of insects and hummingbirds is primarily driven by an inertial effect associated with stroke deceleration and acceleration of the wings and is thus passive. Here we considered the rapid escape maneuver of hummingbirds who were initially hovering but then startled by the frontal approach of a looming object. During the maneuver, the hummingbirds substantially changed their wingbeat frequency, wing trajectory, and other kinematic parameters. Using wing kinematics reconstructed from high-speed videos and computational fluid dynamics mo...
Source: Bioinspiration and Biomimetics - August 28, 2023 Category: Science Authors: Mohammad Nasirul Haque, Bo Cheng, Bret W Tobalske and Haoxiang Luo Source Type: research

Ultra-processed food raises risk of heart attack and stroke, two studies show
Research presented to annual meeting of European Society of Cardiology prompts calls for actionUltra-processed food significantly raises the risk of high blood pressure, heart disease, heart attacks and strokes, according to two studies that one expert says should serve as a wake-up call for governments worldwide.Global consumption of heavily processed items such as cereals, protein bars, fizzy drinks, ready meals and fast food has soared in recent years. In the UK and US, well over half the average diet now consists of ultra-processed food (UPF). For some, especially people who are younger, poorer or from disadvantaged ar...
Source: Guardian Unlimited Science - August 27, 2023 Category: Science Authors: Andrew Gregory Health editor Tags: Nutrition Fast food Medical research Health Heart disease & wellbeing UK news Heart attack drink industry Obesity Society Science Source Type: news

Salt-free diet ‘can reduce risk of heart problems by almost 20%’
Large new study using UK Biobank data shows even a small reduction in salt intake can be beneficialCutting out salt from meals can slash your risk of heart problems and strokes by almost a fifth, the largest study of its kind suggests.Research has documented how adding salt to food increases the likelihood of cardiovascular disease and premature death. Now experts have established just how big a difference you could make to your heart health – simply by reducing the number of meals to which you add salt or by ditching it altogether.Continue reading...
Source: Guardian Unlimited Science - August 27, 2023 Category: Science Authors: Andrew Gregory Tags: Food science Health Heart disease Stroke UK news Medical research Society Source Type: news

Sleep apnoea greatly increases risk of stroke, US scientists find
Stanford study shows that people with the common sleep disorder are also five times more likely to develop atrial fibrillationSnoring loudly and feeling tired even after a full night ’s sleep could leave people at an increased risk of a stroke, a study has shown.Hundreds of millions of people globally have sleep apnoea, a disorder with symptoms including stopping and starting breathing, making snorting noises, waking up a lot and loud snoring. Many have the condition but are undiagnosed.Continue reading...
Source: Guardian Unlimited Science - August 25, 2023 Category: Science Authors: Andrew Gregory Health editor in Amsterdam Tags: Stroke Sleep apnoea Medical research Heart disease Science Society Source Type: news

Watch a person unable to speak for years ‘talk’ using a new brain implant
When it comes to talking, our brain does the heavy lifting. It subconsciously directs the complex coordination of lips, tongue, throat, and jaws we need to pronounce words. And it keeps directing, even in people with paralysis or who are unable to turn these commands into speech. Now, scientists have harnessed this phenomenon to create brain implants that transform this neural activity into text with unprecedented speed and accuracy. In two new studies—both reported today in Nature —the devices enabled two people to “speak” for the first time in more than a decade. The implants produced speech from brain...
Source: ScienceNOW - August 23, 2023 Category: Science Source Type: news

A Single-Center Experience of Correlation of Pulse Pressure to Mortality of Stroke Hemorrhage Patients in Indonesia
CONCLUSION: Pulse pressure had an impact on the mortality of patients with acute hemorrhagic stroke.PMID:37593547 | PMC:PMC10432090 | DOI:10.1155/2023/5517493
Source: The Scientific World Journal - August 18, 2023 Category: Science Authors: Feda Anisah Makkiyah Saraah Dicha Rahmah Hida Nurrizzka Source Type: research