Author Archives: celineh

Worrying about math literally hurts

Image Source: Cliff Mass Weather Blog

Math. Image Source: Cliff Mass Weather Blog

A lot of us grimace at the thought of doing math. Some people’s heart start to beat faster, while others start to feel nauseated from just worrying about the math homework that is still calling out their name. With this math anxiety  problem happening not only in kids but adults as well, it leads us to wonder whether math is really that painful to do.

Math phobias are usually developed in schools. It typically arises from poor teaching or bad experiences in math. This leads to limited understanding on the subject which makes the person want to avoid it even more. Unfortunately, further avoidance causes less exposure to math practice, enhancing the anxiety.

Region of Posterior Insula activated in brain from math anxiety. Image Source: Science Daily.

Region of Posterior Insula activated in brain from math anxiety. Image Source: Science Daily.

Recent research gives a possible explanation on why people with math anxiety have such a hard time overcoming this fear and jumping straight into math problems. Researchers found that the anticipation of doing math and threats of bodily harm activates  the same region of the brain. Using fMRI scans, they tested adults who were shown to have math anxiety and examined their brain activity when given mathematical equations to verify. The scans show that the anticipation of doing math, not doing math itself, caused a response in brain similar to physical pain. It activates the posterior insula in the brain that registers direct threats to the body as well as the experience of pain. As a matter of fact, increase of math anxiety activates more of the posterior insula. This suggests that people with math anxiety experiences painful dread before they even start the problems which makes them want to avoid it even more. It indicates that the anxiety from the  prospect of doing math may arise from negative psychological reactions and not just because the person have poor math ability.

There are several solutions on how to overcome math anxiety. Perhaps most people have already heard of these tips. One way to overcome this anxiety is to not dread over the mistakes that you make from doing math problems but be persistent. One of the most effective way of learning is to learn from your mistakes. Another way is to is do lots of practice, especially when you are having difficulties.

So the next time you feel anxious about tackling your math homework and procrastinate by going on facebook, tumbler, twitter or even just staring into space, think about how the longer you put it off, the more pain your brain actually feels. Doing math doesn’t hurt but thinking about it does!

Here is a video on the symptoms of math anxiety and how it prevents math learning:

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Post Submitted by: Celine Hsin

 

Life after death

Trees in cemetery. Image from  Rootsweb.

Trees in cemetery. Image from Rootsweb.

Have you ever thought of continuing life on earth after death? Perhaps as part of a tree? Although there is a wide range of beliefs on afterlife, one thing is certain: your body is staying here on Earth

Cremation

One of the popular burial method is cremation . Statistics has shown that in 2004, America’s national cremation rate is 30.88% and continues to rise year by year. Cremated human remains consist mostly of calcium phosphate, along with minor minerals such as sodium and potassium. Other elements such as carbon and sulphur are released as gases during burning, although a small amount of carbon does remain as carbonate.

How does cremated human remains become part of trees?

Bios Urn. Image from CBC News.

Bios Urn. Image from CBC News.

There are several options on what to do with human ashes, such as keeping it at home, burying it, and sprinkling it over the ocean or land. Recently, industrial designers, Martin Azua and Gerard Moline, have developed a creative, eco-friendly way to dispose cremated human remains. They have designed a biodegradable urn made from coconut shells, compacted peat, and cellulose. This is also known as the Bios Urn. Ashes will be placed inside the urn as well as a seed of a tree. The urn will then be buried. Calcium phosphate is an excellent fertilizer and since human remains are a good source of those, it will fertilize the seed which will germinate and grow into a tree. Best part is, you get to decide what type of tree or plant you want to become part of.

Although trees help the environment by taking in carbon dioxide for photosynthesis, the cremation process also releases a bunch of carbon dioxide. Depending on the size of the body, cremating one corpse can require two to three hours in a furnace generating more than 1,800°F of heat. Environment analysts have calculated that this energy releases 573 pounds of carbon dioxide into the air. Environmentalists have been trying hard figuring out ways to reduce carbon footprint, so imagine the amount of carbon dioxide released each year from just cremation, is it worth it? Would you want to be buried in the Bios Urn?

Here is a video on how cremation works:

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Blog post submitted by: Celine Hsin

Beavers: Friend or Enemy

Source: http://animals.nationalgeographic.com/animals/mammals/beaver/

Source: http://animals.nationalgeographic.com/animals/mammals/beaver/

Throughout history, humans have a love-hate relationship with beavers. Farmers despise them because beaver dams flood their precious cropland. Hudson’s bay company thank beavers for their pelts. Some of us might even find beavers kind of cute, with their big flat tails and giant guinea pig like figures. So, are beavers our friend or enemy? Here are the pros and cons that can better help you make your decision.

Beavers: The cons

Beavers are notorious for their destruction. With their teeth, beavers can cut trees up to 3 feet in diameter.  Beavers use these trees to build dams on rivers and streams . These dams cause flooding which affects crops, pastures, and drowns stands of trees. This flooding can endanger public safety by saturating the soil and making bridges, and roads unstable. In addition, beavers can chew through valuable, rare and important trees. For example, they took out some of Washington D.C’s world famous cherry blossom trees.  Also, fallen trees can pose as a hazard to utility lines and buildings.

What benefits do beavers provide?

Source: http://www.skipmackey.com/fishstories.html

Source: http://www.skipmackey.com/fishstories.html

Beavers provide several environmental benefits. One of the greatest benefit that beavers provide is the prevention of drought. An experiment  done by Hood et al. show that beavers have a dramatic influence on the maintenance of wetlands during extreme drought.  Due to their ability to create and maintain open areas of wetland, removal of beavers is equivalent to a wetland disturbance such as groundwater withdrawal. Another importance of beaver dams is the self purification of water in beaver ponds. Fine sediments and organic substances settle at the bottom which creates a perfect substratum for aquatic vegetation development. This creates a eutrophic  pond  and the pollutants flowing into the pond can be decomposed by micro-organisms. The dams  also serve as macro-filters that stops the contaminants carried by the water current. For example, herbicides and pesticides that flow into streams are decomposed by bacteria in the beaver dams. Finally, wetlands formed from creation of beaver dams make wonderful habit for creatures such as fish, insects, amphibians, reptiles, and several types of aquatic plants.

So are beavers really all that bad?

In conclusion, other than physical and agricultural damage caused by flooding,  beaver dams create lots of benefits such as drought prevention, purification of waters, and creating new habitats. Personally, I think the advantages beavers provide outweighs the disadvantages. Especially from an ecological point of view, the presence and activity of beavers positively influence the environment.  Whether or not you feel the same is up to you.

Here is a video on how beavers build their dams to help better understand their impact on the environment:

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Blog post submitted by: Celine Hsin