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This is a test of a pm2.5 filter against particulate pollution created by an outdoor BBQ. The filter is functionally equivalent to NIOSH N95 standards, and is used as an insert into a cotton anti-pollution masks.
After almost 20 tests, including control tests without the mask, the average filtration rate for the mask/filter system was 90%, squarely within our target range. This shows about 5% escaped particulate mass duer to the N95 filter, and about 5% due to the mask itself. Either way, it’s more than adequate to reduce most ambient outdoor pollution to a healthy level.
Here’s some of the data:
This experiment concluded that air pollution masks can be helpful for filtering a critical mass of particulate pollution, including pollution caused by organic combustion, when used with a well-fitted respirator mask.
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Find out if the air in San Francisco, California, or anywhere else in the United States is safe to breathe, based on your personalized age and health status, at https://www.cleanairresources.com.
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Over the last couple of years, wildfire smoke has gotten pretty bad in Seattle, and much worse in California. On some days the air quality has been bad enough that even healthy adults should stay inside or wear a mask, and even more so for children and older adults. One day I thought I was having a heart attack when I got to work, only to realize it was the air pollution.
Besides the fundamental issue of wildfire management, there are two problems that needed solving to protect people on a day-to-day basis. First, no one should rely on side effects to tell them the air is unhealthy to breathe. Second, last year pollution masks and high-grade n95 filters were unavailable to millions of people who needed them during the fires in the summer and fall.
Puraka developed a service that tries to address both problems. If a pollution mask is needed based on the local air quality and your unique health and age combination, a monitoring algorithm sends you a text message to let you know. More importantly, the algorithm also keeps track of how many n95 filters you're using, and a fulfillment service mails you new ones automatically, as needed, so nobody has to worry about being caught unprepared.
There's more info on our site at www.purakamasks.com.
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This gif shows how median air quality changes every month in California. Uses an aggregation of daily AQI data from Airnow and research from cleanairresources.com.
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Easy to use calculator for figuring out if your pollution mask is effective or not, depending on the filter (N95, etc.) and air quality (Airnow AQI).
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Interactive chart demonstrating wide variations in New York City home-equity values and ownership by free-and-clear vs. mortgaged homes.
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One of the advantages of living in a global economy is access to a wide variety of financial markets. With this chart, you can compare performance across a number of global economies using Exchange Traded Fund (ETF) data over a number of time periods.
#investing#stocks#personal finance#finance#economics#datavisualization#charts#data#technology#apps#walletwyse
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CoverMe-Seat - Safety in Six Seconds or Less
#Vimeo#technology#inventions#protection#pewpew#security#executiveprotection#bulletproofvest#bodyarmor#ballisticprotection
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6 Seconds or Less
#science#technology#creativity#tech#gadgets#safety#protection#inventions#diy#coverme-seat#practical protection
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Trinity Merrill on getting covered
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Indices are imperfect as a reference for a specific location, but they are a great way to compare locations. One of the interesting things about this dataset is visually associating cities you wouldn’t otherwise associate, based on similar rent levels.
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