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Linear Algebra in Engineering: Trend Analysis with with Polynomial Least Squares (Part 2 of 7)

Preface
This series is aimed at providing tools for an electrical engineer to analyze data and solve problems in design. The focus is on applying linear algebra to systems of equations or large sets of matrix data.

Introduction
This article will demonstrate the use of least squares fit real data to a polynomial.

Linear Algebra in Engineering: Equilibrium in Linear Systems (Part 1 of 7)

Preface
This series is aimed at providing tools for an electrical engineer to analyze data and solve problems in design. The focus is on applying linear algebra to systems of equations or large sets of matrix data.

Introduction
This article will demonstrate the use of matrix algebra to solve for equilibrium in systems. This is common in network flow, economics and electrical circuits (current and voltage analysis). We will apply exact and least squares solutions.

New Smartphone is a Disappointment

I must express my disappointment in my new smartphone. I thought upgrading from the dated, failing and left behind Samsung Galaxy S III to the larger, faster, updated Samsung Galaxy S6 would be just the tool I needed to bump my game to the next level. But it was not so.

On the plus side the updated audio provided a much higher fidelity listening experience. And the display is gorgeous. And the ambient light sensor actually works (even in the dark it can be adjusted to a reasonable level). The camera is significantly faster, more capable and higher resolution.

Fitness Tracking

One of the biggest difficulties I have getting fit is the lack of metrics on progress. I have no way of knowing whether or not a workout is effective or whether or not I'm making good use of my time. Fitness trackers are available now although most of them only track footsteps which to me is useless (maybe I'm wrong).

In addition I also have a terrible time getting quality sleep. I wish there were a device that could monitor and debug my sleeping difficulties.

Estimating CPU Power

Introduction
This is a basic outline for determining minimum CPU core, core mix and core frequency and also minimizing power consumption.

Define High Level Use Cases
First define what tasks your CPU will perform. This will usually be something like a certain number of computations per second, minimum frame rate in a game or video play back or web pages served.

Determine Design Constraints

Building a Home Theater: Things to Consider

Target: These days Blu-Ray offers very high fidelity video with multi-track audio.

This is a checklist of things to consider when building your home theater.

Source Player:

Perfecting the CD Rip

You can rip any CD with just about any software and any drive and get a good, listenable copy of the original. But how close is it to exactly what the studio recorded? And can you tell the difference? Who knows, but let's discuss how to produce the perfect rip.

Philosophy vs Technology

This is a huge subject I'm not about to take on completely, but I've had it on my mind for some time since seeing a documentary about the Logical Positivists and reading some of Husserl's work.

Obvious questions:

Beersworth Chart

How much are you really drinking? How much alcohol is in that 7oz pour of stout? Did you just hammer a bomber of IPA and want to know what you've gotten yourself into? Use this chart to find out.

1 beer = 12oz @ 5%

(And just for kicks a 16oz pour of Firestone-Walker Union Jack is also added.)

I Don't Believe in Dark Matter

I think dark matter is an awful explanation for an explanation of the "missing matter" problem. We can't see it? Oh it must be invisible?!? Lame.

I have another idea and it is much more simple. It starts with the basic question: What if the gravitational effects come from beyond the edge of our universe?

A couple of points of evidence and a concept appropriated from astronomy:

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