Ever wondered how drones are built? Or if you could build one of your own? This article provides some answers.
Many personal drones are some style of multicopter – a flying machine with spinning propellers. Quadcopters have four. Hexacopters have six. Yet “there are plenty of cases in which standard quadcopters and hexacopters might not be the best solution for a given task,” notes Tao Du. “There are only a small range of options for drones that you can buy," points out this MIT graduate student who worked on the new program.
The system from Du's team is the ultimate in do-it-yourself. It lets people pick the size, shape and structure that best fits their needs. Such an approach increases the shapes, styles and sizes of drones that users can fly and what they can do with them. And the designers don't need to be experts in physics to do it.
Read Article: https://www.sciencenewsforstudents.org/article/build-drone-your-dreams
Beta-blockers are one of the most widely prescribed classes of drugs to treat hypertension (high blood pressure) and are a mainstay treatment of congestive heart failure. Beta-blockers work by blocking the effects of epinephrine (adrenaline) and slowing the heart's rate, thereby decreasing the heart’s demand for oxygen. Long-term use of beta-blockers helps manage chronic heart failure.
Read Article: http://www.webmd.com/heart-disease/guide/beta-blocker-therapy#1-2
A fascinating article about how better blood pressure controls could translate into many saved lives.
Intensive systolic blood pressure (SBP) lowering may prevent more than 100,000 deaths in the United States each year, according to a study that was presented at American Society of Nephrology’s Kidney Week 2016 conference held November 15-20 at McCormick Place in Chicago, IL.
Read Article: https://www.mdlinx.com/cardiology/article/675
Arconic, a materials science company, has envisioned a 3-mile-high (4.8-km) skyscraper built from materials that are either in-development or have already been brought to market, including smog-eating surfaces and retractable balconies.
Read Article: http://www.sciencealert.com/a-company-has-released-plans-for-a-3-mile-high-skyscraper-that-eats-smog
The effect of constant stress on a deep-lying region of the brain explains the increased risk of heart attack, a study in The Lancet suggests.
In a study of 300 people, those with higher activity in the amygdala were more likely to develop cardiovascular disease - and sooner than others.
Stress could be as important a risk factor as smoking and high blood pressure, the US researchers said.
Heart experts said at-risk patients should be helped to manage stress.
Emotional stress has long been linked with an increased risk of cardiovascular disease (CVD), which affects the heart and blood vessels - but the way this happens has not been properly understood.
This study, led by a team from Harvard Medical School, points to heightened activity in the amygdala - an area of the brain that processes emotions such as fear and anger - as helping to explain the link.
The researchers suggest that the amygdala signals to the bone marrow to produce extra white blood cells, which in turn act on the arteries causing them to become inflamed. This can then cause heart attacks, angina and strokes.
As a result, when stressed, this part of the brain appears to be a good predictor of cardiovascular events.
But they also said more research was needed to confirm this chain of events.
Read Article: http://www.bbc.com/news/health-38584975
By MARCIA DUNN, AP Aerospace Writer
CAPE CANAVERAL, Fla. (AP) — It turns out the moon is older than many scientists suspected: a ripe 4.51 billion years old.
That's the newest estimate, thanks to rocks and soil collected by the Apollo 14 moonwalkers in 1971.
A research team reported Wednesday that the moon formed within 60 million years of the birth of the solar system. Previous estimates ranged within 100 million years, all the way out to 200 million years after the solar system's creation, not quite 4.6 billion years ago.
The scientists conducted uranium-lead dating on fragments of the mineral zircon extracted from Apollo 14 lunar samples. The pieces of zircon were minuscule — no bigger than a grain of sand.
Read Article: http://www.usnews.com/news/news/articles/2017-01-11/scientists-moon-over-the-hill-at-451-billion-years-old
The “weekend warrior” exercise pattern – having one or two rather than five to seven leisure-time activity sessions per week – may be sufficient to reduce all-cause, cardiovascular disease, and cancer mortality risks, according to a report published online Jan. 9 in JAMA Internal Medicine.
Read Article: http://www.mdedge.com/ecardiologynews/article/128968/preventive-care/weekend-warrior-exercise-pattern-sufficient-cut
The Women in Cardiology (WIC) section of the American College of Cardiology (ACC) report that 47% of female cardiologists have avoided being pregnant during periods when they would be exposed to radiation, but 57% have been exposed to radiation while pregnant. Furthermore, only 20% used foetal radiation badges and only 24% used additional lead when exposed to radiation during pregnancy.
Amy Sarma (Department of Cardiology, Massachusetts General Hospital, Boston, USA) and others state, in the Journal of the American College of Cardiology, a survey has indicated that only 21% of general cardiology fellows are female and this figure drops to 8% for interventional cardiology fellows. They add that another survey suggested that female cardiologists are less likely than their male counterparts to be married or to have children and have differential childcare roles (ie. more likely to be the main caregiver). “However, the experience of pregnancy among cardiologists has never been investigated, although it is speculated that concerns surrounding pregnancy may deter women from choosing a career in cardiology”. Therefore, they sought to determine the “impact of a career in cardiology on the issues of family planning to better understand the current experience and inform strategies for reform”.
Read Article: https://cardiovascularnews.com/few-cardiologists-take-steps-to-avoid-radiation-exposure-during-pregnancy-despite-concerns/
Dyspnea is the medical term for shortness of breath, sometimes described as "air hunger." It is an uncomfortable feeling.
Shortness of breath can range from mild and temporary to serious and long lasting. It is sometimes difficult to diagnose and treat dyspnea because there can be many different causes.
Shortness of breath is a common problem. According to the Cleveland Clinic Center for Continuing Education, 1 in every 4 people who visit the doctor have dyspnea.
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Read Article: http://www.medicalnewstoday.com/articles/314963.php