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Showing posts from 2018

How are your devices kept cool?

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How are your devices kept cool? In our pockets, we carry around devices that used to take the space of an entire room.  They stay cool, or sufficiently cool to operate, even though we are processing massive amounts of data at our fingertips.
But how? How are computers, laptops, tablets and phones kept cool? I found myself discussing this with a friend and decided it would make for an interesting blog post.
Over the last year, I've developed PC building as a hobby and cooling is one of the more interesting topics. Cooling a computer touches on a lot of topics in physics, particularly fluid flow and thermodynamics.
I'll discuss the cooling of computers first, then move through laptops, tablets and phones. Rather than explain the principles first, I'd like to discuss them in passing.
Computer cooling: Heat sinks and Fans
A computer generally has two components that need to be actively cooled. The first is the Central Processing Unit (CPU) which is present in all modern day c…

Let's talk about GMOs, part three: What will we use them for?

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Introduction
In my first post, I discussed what DNA is and how it relates to phenotypical (outward) change through the central dogma of molecular biology. In the second post I discussed the techniques of genetic engineering, including the novel and prodigal technique called Crispr/Cas9. In the third and previous post we discussed current uses of the technology.


In this post, we will look at the future uses of the technology.  I can not promise to cover all possible future and research purposes, simply because it is too extensive. I will discuss three good examples, one for research, one for medicine and one for food. We will leave the issue of designer babies for the next part in the series.

Wide-field Fluorescence microscopy Wide-field fluorescence microscopy is a research technique to investigate how things work on a microscopic scale. We'll need a short discussion on how the microscopy part works. Fluorophores are molecules that can be activated by (laser) light, after which t…