Monthly Archives: August 2018

Beavers

In the beginning of the 20th Century beavers were hunted to near extinction in both North America and Europe. It is estimated there were 10 million beavers in Europe before hunting began, , out of which only some thousand survived in small pockets in isolation across the continent.

Beavers have been making a comeback, and five yrs ago the European population is estimated to have grown to at least one million. Most of these belong to the original Eurasian species, but Finland’s current population has its origins in the translocation of North American and Eurasian beavers carried out in the 1930’s. interestingly the two species do not interbreed.

A beaver family usually changes territories once every 3-5 yrs..but can stay in the same area as long as 20yrs.  After beavers move on the dam gradually disintegrates and the pond empties. It may fill up again in 10 yrs or say with returnees starting again. Beaver habitats are in fact under going a constant change between terrestrial and aquatic ecosystems.

Earthquakes and injecting wells

A study of earthquakes caused by injecting fluids deep underground has revealed surprising patterns, suggesting that current thinking on hydraulic fracturing, wastewater disposal, and geothermal wells may need to be revised.

Data from around the world was analyzed and it was found that a sole injection well can cause earthquakes at a distance of more than 10k from the well. It was also found that generally injecting fluids into sedimentary rock causes larger, more distant quakes than injecting into the underlying basement rock. The current thinking is that the sedimentary rock is safer to inject into than the base rock.

Injecting fluid into the rock is thought to induce earthquakes as a direct result of increased fluid pressure in the rock pores, causing faults to slip more easily. Secondly, poroelastic coupling is something seen when the fluid is put in one area but the pressure is transmitted through the rock to transmitting rock stresses some distance away leaving a larger footprint.

With little water…they drink Coke…but diabetes is rampant.

San Cristobal de las Casas is a town in a rainy region of Mexico. Even so running water is only available every couple of days and can be so heavily chlorinated as to be undrinkable. Potable water is becoming increasingly scarce. Many households are forced to buy water from tankers.

 

However, a local bottling plant produces Coca-Cola. It is readily available and almost as cheap as water. Mexico is one of the world’s biggest consumers of sugary drinks, and San Cristobal and surrounding Chiapas are very big consumers. Residents can drink an average of 2 liters a day of the sweet stuff.

The effect on public health has been critical. The mortality rate from diabetes in Chiapas  increased by 30% between 2013 and 2016, and the disease is now the second leading cause of death in the state after heart disease.

The issue seems to be that Coke is now almost more readily available than water. Kids are drinking the sugary drink more than water. Diabetes is hitting the adults now , but will soon be seen in increasing numbers in the kids.

challenged by the dual crises of diabetes and chronic water shortage the residents of San Cristobal have identified what they believe is the culprit. The Coca-cola factory.

Protests have occurred. Perhaps the people of San Cristobal need to look to the government to better serve them with potable water.

 

The Swim Test for Smartphones

When a manufacturer of smartphones indicates their phone is water proof…how do they verify that claim?

When talking about their products water worthiness companies are talking about IP or ingress protection. The standardized IP test is all about how much water and dust a device can keep out. Phone makers typically list a products results as a IP rating.

In recent Galaxy devices , Samsung talks about an international standard rating of IP68, and says the Galaxy S7 and later models are deemed fit to withstand dust, dirt , and sand, and are resistant to submersion up to maximum depths of 1.5metres for 30 mins. This should be enough to protect it from the dreaded “toilet drop”.

As for those numbers..the first digit refers to the level of protection from solid substances and is measures from 0 to 6. 0 is no protection. 6 is no dust enters for 2-8 hours.  The second number refers to water and is rated from 0 to 9. 8 designates protection against water immersion under pressure for long periods. 9 means the object can with stand high pressure water jets.

Apple’s support guide regards the dust and water resistance of the iPhone 7 and later as IP67. Splash and general water resistance can be affected by normal wear and tear.

Waterproof is a term used in some marketing pieces, but the term water resistance is more accurate. If you need to use your phone around liquid environments your best bet is to get a proper water tight case.

Sea Doo Watercraft Safety Issues

The popularity of Sea-Doo or Jetski watercraft has been seen for awhile now.  Although alot of fun , there are also safety concerns that we need to be aware of. check out this video and stay safe on the water.

Boater Safety

A few more weeks of great summer weather ahead….lots of time to have some boating fun and possibly run into some troubles on the water. Let us review some boater safety issues.

and now let’s review some boater navigation rules..

How to deal with a flipped canoe.

Disaster strikes and over you go…now what?

Next time out in a canoe consider tipping over and practice getting back in the boat. builds confidence.