Adventures at home, abroad, and online

Tag: Life

Enough about me, what do you think about what I just said?

Circumstances Beyond My Control

I spent the month of January working on MIT’s autonomous robotics competition, 6.270. The chassis was made with Lego, with a big collapsable arm on the front and a more than passing resemblance to a certain Star Wars character. We dubbed it “Admiral Ackbot”, and had planned to yell “it’s a trap!” during the final competition. Unfortunately, due to a blown component on our microcontroller, the robot would spontaneously reboot, causing the loss of our first two rounds and our elimination from the contest. I feel that our design and strategy would have gotten us pretty far, had our board actually worked. Another hard won engineering lesson…

Our witty team website, Admiral Ackbot and the Mon Calamari Cruisers

Ballistic Missile Simulation

I worked at GlobalSecurity.org as an intern this summer, and in addition to website maintenance and research, wrote a program to estimate the trajectories of ICBMs. It’s possible use is quite limited, because it assumes a knowledge of the technical details of the missile (booster and reentry vehicle characteristics, as well as fuel masses and specific impulse), however it includes estimates for this data by Charles Vick for the main Iranian, Pakistani and North Korean missiles. Interestingly, these missiles are all closely related, as a formal paper I edited indicates.

The program was written in Python, and requires wxPython for windowing and Numpy for plotting. I have compiled all these dependencies together for binaries for Windows and Mac OS X 10.4. The source is also available, and will be of interest to the discerning user. The Read Me has more information on the specifics of the simulation, and is required reading if you’re going to do anything serious with this data.

Disclaimer: I wrote this software as a sophomore engineering student, and I make no guarantee as to the accuracy of the output. It gives me correct values for my test cases, but don’t make policy (or go to war), on my say so.


Update, October 29, 2013:

This code is now on GitHub, with a few gui and packaging changes from Karsten Wolf. github.com/jlev/ballistic-missile-range

The compiled binaries are quite old, and may not work well on more recent operating systems.

Protected: The Night I (Almost) Burned Old Next House Down

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First Post!

This is your standard virtual ego-trip, and a testbed for my knowledge of standards-compliant web design. It’s sparse, but that’s the way I like it. The rollover menus and Quote-o-Matic may not work in IE. Stop complaining and get a real browser.

The photos on the left are slowly coming online. The system for generating the galleries works, but the images themselves are yet to be sorted. At least it gives me something to do while avoiding work.

Visual Versus Verbal

The Forest in the Winter at Sunset (1845-67), Pierre Rousseau, Metropolitan Museum of Art, New York

“This painting is terrifying,” she said. I had to agree. Two figures, central in the frame, are dwarfed by the literal awesomeness of the forest. The sky is an ominous orange, perhaps because of a fire, or one of those cold winter sunsets, where the cold creeps in as sun descends.

Geese fly overhead, in their classic flying vee. They have the sense and the ability to go south. Where can these pour souls escape to? They have only a narrow path through the tangled brush, puddles to slog through, and precious minutes left of daylight.

As I read the placard accompanying the painting, every tool of analysis from high school english classes comes rushing back from my forgotten memories. The classic types of conflict: man vs. nature, man vs. self, man vs. man. These two hold on to each other to weather the storm. They cooperate against nature. But if the forest is the soul, and the sunset our human frailty, then against whom do we fight? We can’t very well take on the entire world and win.

We walked here from Columbia; first twenty blocks south, then through Central Park, then another ten blocks while we got unlost. She’s supposed to know where she is; at least she lives in this city. I am totally useless without a map and compass. At least this urban jungle is a grid, we have the advantage of several orthogonal paths through the underbrush.

On the path through the park, we passed business men and women exercising themselves. Step out of the office, into this small rectangle of nature, protected by expensive running shoes, goretex jackets and an iPod. Not these two, they run for their very lives. As if they “had the very whips of their masters at their backs.” Perhaps this is Fangorn forest, and one of these crooked trees is an Ent.

“What do you want to do with your life?” I asked, by way of an introduction. “Environmental science,” she replied. How typical, I thought. All of these rich girls want to save the world. I always thought she was more of the physics type, but then she grew her hair long, and her curls became dreads. And I knew we were on different paths through this jungle.

The hunched figures hurry along to make it home alive. I navigate the subway system and try to find 139 Canal Street and the Chinatown bus. I am successful, and catch the last few seconds of the Superbowl in my dorm. Are these two so lucky? No post-victory riot awaits them, only the trial of living one more day. And for that, we are grateful.

Wrote this for 21W.730, the writing class I had to take because of my own laziness when taking the Freshman Essay Exam. Note to self, don’t be an idiot, take all written tests seriously.

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