Russ Ewell

Russ Ewell

Palo Alto, CA, United States

Russ Ewell runs two technology-focused companies, is an author, a preacher, and is a disability advocate.

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About the author

Russ Ewell is the founder of HTG, E-Soccer, and Digital Scribbler Inc. His work focuses on using technology to overcome human limits.
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English
Non-Fiction
Christian (Non-Fiction)

Latest blog posts from Tumblr - Russ Ewell

Allergy Season Explained

teded:




Happy First Day of Spring, Tumblr! 


What better way to celebrate than to **ACHOO!!**….wait, what were we saying?


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Ah, spring! Grass growing, flowers blooming, trees growing new leaves, but if you get allergies, this explosion of new life probably inspires more dread than joy.  


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Step outside, and within minutes, you’re sneezing and congested. Your nose is running, your eyes are swollen and watery, your throat is itchy. For you and millions of others, it’s seasonal allergy time. So what’s behind this onslaught of mucus?


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The answer lies within you. It’s your immune system. Seasonal allergies, also called hay fever, or allergic rhinitis, are a hypersensitive immune response to something that’s not actually harmful. Pollen from trees and grass, and mold spores from tiny fungi find their way into your mucous membranes and your body attacks these innocuous travelers the same way it would infectious bacteria. 


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The immune system has a memory. When a foreign substance gets tagged as threatening, white blood cells produce customized antibodies that will recognize the offender the next time around. They then promptly recruit the body’s defense team. But sometimes, the immune system accidentally discriminates against harmless substances, like pollen. When it wafts in again, antibodies on the surface of white blood cells recognize it and latch on.


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This triggers the cell to release inflammatory chemicals, like histamine, which stimulate nerve cells, and cause blood vessels in the mucous membranes to swell and leak fluid. In other words, itchiness, sneezing, congestion, and a runny nose. 


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Allergies usually, but not always, show up for the first time during childhood. But why do some people get allergies and others don’t? Allergies tend to run in families, so genetics may be one culprit. In fact, errors in a gene that helps regulate the immune system are associated with higher rates of allergies. The environment you grow up in matters, too. Being exposed to an allergen as a baby makes you less likely to actually develop an allergy to it. People who grow up on farms, in big families, and in the developing world also tend to have fewer allergies, although there are plenty of exceptions, partly thanks to genetics. One theory is that as children, they encounter more of the microbes and parasites that co-evolved with traditional hunter-gatherer societies.


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Called the hygiene hypothesis, the idea is that when the immune system isn’t exposed to the familiar cast of microbes, it’ll keep itself busy mounting defenses against harmless substances, like pollen. Another theory is that an immune system toughened up by a barrage of pathogens is less likely to overreact to allergens. Pollen is a common offender, just because we encounter so much of it, but there’s a long list of substances: dust, animal dander, insect venom, medications, certain foods, that can send your immune system into overdrive. Some of these reactions can be scary. An allergy can develop into full-blown anaphylaxis, which typically brings on severe swelling, shortness of breath, and very low blood pressure. It can be deadly.


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But as we who suffer from seasonal allergies know, even non-life threatening allergy symptoms can make you miserable. So what can you do about it? Medications can help reduce the symptoms. The most common ones keep histamines from binding to your cells. These antihistamines stop the inflammation response. Steroids can help dial down the immune system. Another more permanent option is immunotherapy. Deliberate, controlled exposure to gradually increasing amounts of an allergen can teach the immune system that it isn’t dangerous after all. 


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Of course, you can always just wait your seasonal allergies out. The spring pollen onslaught dwindles by mid-summer…just in time for ragweed season!


From the TED-Ed Lesson Why do people have seasonal allergies? - Eleanor Nelsen 


Animation by TED-Ed



Yes it is here!

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Mar 21, 2018 15:45

Latest blog posts from Wordpress - Russ Ewell

Navigate the City with These Assistive Technologies

Modern technology is empowering people to make simple changes to the way they live. For instance, voice-activated commands have become a common way for consumers to shop and self-driving cars are making their way into the general population. However, these innovations aren’t nearly as astonishing as the technology that’s empowering individuals with disabilities to live more efficient lifestyles – especially those who live in bustling cities.


It’s harder for people with disabilities to make trips outside of their homes. Consequently, the assistive technology business is a growing industry that’s set on changing the lives of people with disabilities by helping them get around their cities. This list gives a synopsis of the way technology is evolving to help the handicapped find accessibility in their cities.


 




  • Walking Stick of the Future: Visual impairments make living in a crowded and busy city extremely difficult. Imagine moving along a busy intersection without relying on the use of eyesight for guidance. Engineers from Young Guru Academy (YGA) in Turkey have developed a smart walking stick – the WeWalk Stick. This technology uses voice navigation to guide the user. It’s integrated with Google maps to help the user with navigation, and it warns the user with vibrations when the stick is approaching objects above chest height


 




  • Robotic Suit: A brilliant innovation in mobility is making marathon racing possible for people with disabilities. This exomuscular robotic suit has sensors that help control its movements and adds a layer of artificial muscle to support stability and mobility. A robotic suit sounds like it would weigh a ton, but this innovation weighs just 11 pounds.


 




  • Wheelchair That Climbs: A new innovation in handicapped assistance is set to become available by the end of 2019 – the Scewo. For individuals living in or outside of the city who have a physical disability, stairs are an unavoidable obstacle. It’s hard to imagine staying on the ground level when there’s a horizon of sky rises. Luckily, developers of the wheelchair technology created a wheelchair capable of facing a variety of terrains, including stairs.


 


These machines and the technology that powers them have the ability to dramatically change the lives of individuals with physical disabilities. While these innovations are relatively expensive, this technology is just becoming available to the public and this growth will come to more affordable options for all. It is hopeful that this technology will continue to grow at this rapid pace and soon navigating a city with a physical disability will not be a daunting task.


This article was originally published on RussEwell.co


Navigate the City with These Assistive Technologies Russ Ewell

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Sep 11, 2019 20:29