Engineering for Dogs

My sister, who has had a few miniature Dachshunds who were troopers into quite advanced ages, sent me this video. It's pretty funny, but it is also interesting to see the dog understands how to operate the machine and respond to it.

Engineering for dogs!

Stainless Steel

This evening we started welding stainless steel, which has a faint and oddly clean smell. It's a bit awkward to work with, as you have to move the torch quickly; otherwise, the back of the weld carbonizes, which will result in weld failure. Of course, if you move too quickly, you won't get a weld with quality penetration.

We started with lap joints without filler. Then we did lap joints with filler, which was almost easier, despite the greater hand-eye coordination issues.

Were I not so sick, I surely would have had the patience to make a better weld, but I just could not stay. My nose kept running everywhere.

20130319-221127.jpg

Sick

There are few things more hateful for a student than coming down with a terrible debilitating cold the day before a major test. I am not happy about this developmebt

Nadir Fix

For years I have shot my panoramas as 6 horizontal shots around, spaced 60 degrees apart, and one zenith shot straight up. However, I rarely bothered with the nadir shot where the tripod stands. The result was a hexagon of nothing, where the horizontals panes met but didn't come together at the nadir.

The easiest way to deal with nadir hole is to cover it with a layer bearing a logo then flatten the image. No need to align anything or tweak colors and such to make things blend naturally, as if no tripod ever existed. The few times I had set the tripod aside to shoot the ground beneath it to fill the nadir hole, I met with failure.

Tonight I took my freehand nadir shots, ran them through LensFix CI to defish them, cut out the section that would cover the hole, and used it in a layer. That layer was resized, rotated, and tweaked with the Warp tool under Edit:Transform. Then the layer's Levels are worked to get as seamless a match with the surrounding background as possible. Flatten a last time.

Surely greater competence with Photoshop would help, but I like what I've done: capped the nadir with a natural look.

Not Yet ABET

Earlier today I learned I was not selected for a particular internship. While I knew the actual division to which I applied was interested in me for my grades, publications, and Japanese ability, HR refused me because Ivy Tech is not ABET accredited. They also had trouble considering me for an internship because I already have an undergraduate degree though in a wholly unrelated field.

While disappointing, I am registered for summer classes, so progress will continue. At the end of December, I should complete my AS in Pre-Engineering (Electrical Engineering) and transfer its credits to IUPUI, which is ABET accredited, where I will complete my BS EE.

Most likely I will have my Ivy Tech Welding Certificate by then, too.

Chapter 15.4, #23

\int^{0}_{1}\int^{y}_{\sqrt{2-y^{2}}}(x+y)dydx

From the limits of integration, we see that y is from 0 to 1. Moreover, x=y, which implies \pi/4, and x is from 0 to \sqrt{2}.

\int^{\pi/4}_{0}\int^{\sqrt{2}}_{0}(rcos\theta+rsin\theta)rdrd\theta=
\int^{\pi/4}_{0}\int^{\sqrt{2}}_{0}(r^{2}cos\theta+r^{2}sin\theta)drd\theta=
\int^{\pi/4}_{0}\frac{1}{3}r^{3}(cos\theta+sin\theta\left. \right|_{0}^{\sqrt{2}})d\theta=
\frac{1}{3}\int^{\pi/4}_{0}(2\sqrt{2}cos\theta+2\sqrt{2}sin\theta)d\theta=
\frac{1}{3}(2\sqrt{2}sin\theta-2\sqrt{2}cos\theta\left. \right|_{0}^{\pi/4})=
\frac{1}{3}[(2-2)-(0-2\sqrt{2})]=
\frac{2\sqrt{2}}{3}

This is getting troublesome, as I don't use LATEX enough to remember key markup bits.