Mars Curiosity, The Art in Engineering

I listened to and watched the Mars Science Lab mission land the Curiosity rover last Sunday night. It was a mix of high drama with advanced technology.  Below is one of the first pictures returned after the landing showing a fish eye view of a the rover wheel, and at the upper right corner, the edge of the Gale crater.

Did you ever wonder what it takes to get that image to Earth?

What is it like to design software that can capture that image and runs on a space craft on another planet where there is no “help desk”? How do you design the code to process it with a 20 MHz CPU (that’s right, 1,000 times slower than what’s in your iPhone or laptop), very limited memory of a bit less than 10 MB (an iPhone 4s can have 64 GB or about 6,400 times more memory), then send it anywhere from 36,000,000 up to 250,000,000 miles (+/-) to earth using a 10 watt transmitter (one fluorescent tube in the light above you is 32 watts)?

Here is an interesting description of what it takes to design that software based on an earlier Mars mission, the Phoenix mission, that was sent to the Martian north pole to look for frozen water. http://cdn.oreilly.com/radar/2012/08/Beautiful_Data_Chapter3.pdf

You can read about the tradeoffs that were made to meet the design goals.  Sometimes we forget that products and technologies have limitations, and the act of engineering includes figuring out how to accomplish the goal but not exceed the technology limitations.  That’s the art in engineering.

The Phoenix mission did find water, and that discovery helped drive the design of the current Mars Science Lab mission with the Curiosity rover to search for biological precursors of life on Mars.

BTW, my name is on the Phoenix lander, along with many others, inscribed on a silica mini-DVD with a collection of literature written about Mars provided by The Planetary Society.

I wonder who might find and decode the contents of that digital DVD time capsule one day?

Favorite Lake Powell Pictures

I enjoy the process of taking pictures. I usually try to compose an image and then take the picture with some hope the image I get will match the one I envisioned.

Back when I started with photography in the 7th grade, I was fortunate that my junior high school had a darkroom complete with enlarger. But, composing the picture was just the beginning. You had to develop the film. And that starts with learning how to unload the exposed film from your camera and wind it on a spool that goes into a light-tight can. But, you have to do this in pitch darkness so stray light won’t fog the film.  It’s done by sense of touch and could be frustrating when the film refuses to feed smoothly into the spool.

Then, you pour various chemicals into the can spinning the spool around to develop the film. When done, you open the can and take out a film strip with negatives (whites are black and blacks are white, and no, I could not afford color film or processing but those negatives show “negative” color for the three primary colors used).

Using the enlarger, you expose the print paper for a few seconds to light that you shine through the negative. This creates a negative, negative so once again black is black and white is white. But, when you turn off the enlarger light, there is no image visible on the paper. You have to take the paper and slosh it in trays of similar chemical solutions to get a print. There is magic in watching a piece of white paper slowly transform into an emerging image that finally comes into sharp focus.

The time from composing a picture to seeing the print for the first time was often several weeks as it took me awhile to shoot a roll of 12 images. I was very deliberate of what I took pictures of due to the cost of film and the labor of creating a print.

Today, with digital imaging, I get to see the picture “immediately” and I shoot many more pictures than I did with film. As with film, what I get is never quite what I saw in my mind’s eay. Sometimes its better.

Here are my favorites. And this link takes you to some more from Devin.
http://wordpress.reams.me/2012/lake-powell-2012/

 

 

 

 

 

 

 

Two Gallons

If it was two gallons of gas, it would cost about $7.00 today in Denver, CO.

In my case, the two gallons is the total amount of blood I’ve donated so far. The value of my two gallons is likely quite a bit north of $7.00 to those in need.

If you aren’t a blood donor, you can be. If you really have a phobia about needles (like I had), giving blood will help you get over that phobia. I don’t get weak in the knees anymore at the sight of a needle, (but I don’t watch them put it in either).  🙂

 

 

 

 

 

Musing #6 The “Quantified” Life

Recently, there have been news reports about Google’s new privacy policies, Google’s street view project intercepting Wi-Fi content, Facebook’s general “thank you, that’s mine” approach to what you do and where you go on the internet and then today, I saw this article on “The Quantified Life“. This is also known as “lifeblogging”.

I don’t get it. 

Why would anyone want to record everything they do, said, to whom they said it, or where they went? What need does this satisfy?

Some of the comments to this article are … at best, naive. One commenter said this would really help us to “know ourselves” better. Really?? No. I don’t think so.

You come to know yourself by taking the time to focus the reflective part of the mind on the self as you evaluate experiences you have had and the associated emotions they are wrapped in. Introspection does not need a realtime recording of all events in the day you experienced. If it did, you would never complete a reflection as it would take just as long to reflect as it did to experience in the first place. [We do need some time to sleep 😉 ]

Another comment from a “future economist” stated he was “blown away” by what we can learn “from the data”. Really? I don’t think economics suffers from a lack of data, it suffers from a lack of understanding about how humans make decisions. [IMHO, this is due to separating our emotional motivations out of the economic algorithms]. Since lifeblogging of all events in your day does not convey the emotional state of you or other people involved (and thank goodness for that), it adds little useful learning to economics as best I can tell.

And finally, this article is more interesting due to what it does not say. It does not talk about the destructive power of this information. If it’s digitally recorded assume it can be used by anyone for any reason. If it’s centrally stored, it is very easy for any government entity to get access. Finally, why would you ever provide this much personal information about your going and coming to any commercial enterprise? Do you think their motivations are more noble than the government?  Really? Truly?

I’m left with several questions:
– Is the interest in lifeblogging a symptom of an inability to be comfortable in your annonimity?
– Does it reflect a deep longing to have your existence acknowledged despite your ability to text and tweet at will?
– Are people uncomfortable with quietly engaging in deep introspection to make sense of their emotions, decisions and interactions with other people?

To quote Alice in “Alice in Wonderland”:
“Curiouser and curiouser”. 

And even more to the point:
I wonder if I’ve been changed in the night? Let me think. Was I the same when I got up this morning? I almost think I can remember feeling a little different. But if I’m not the same, the next question is ‘Who in the world am I?’ Ah, that’s the great puzzle!”

Indeed, that is the great puzzle, but I doubt a quantified life will help you put the pieces together.

 

Musing #5 Being Balanced

I found a TED talk on what’s commonly called “Work/Life Balance” by Nigel Marsh. I think the use of work/life inplies a conflict and separation where none should exist. Work is part of the experience of living so work’s woven into the process of becoming who we are, not entered into as a separate state.

Nigel’s advice can be summarized as “Monitor the process becoming who you are and aim to be engaged with and connected to multiple experiences”.  If living is about the process of becoming, it makes sense to avoid “lock-in” so becoming who you are is as rich an experience as it can be.

He makes four points about how to achieve balance.

  1. Some job choices leave no time for proper attention to marriage and children. Confusion of wants with needs leads to working for money, not joyful experience.
  2. The problem is within us, so we can’t look for a solution outside ourselves. We are responsible for the experiences we choose, work being one of our choices. Your company will not/does not concern itself with how work is experienced by you.
  3. Measuring balance requires a time frame for the accounting as does balancing the books in finance. We don’t balance them every minute nor every five years. Choosing the time frame avoids anxiety (too short) and regret (too long).
  4. Approach the goal of achieving balance in a balanced way. Intellectual, emotional, spiritual, physical and sexual activities require proper attention, time and contemplation. They are not well served by multi-tasking. Full attention to each in the proper place and time creates the balance of experience that results in a fulfilling process of becoming who you are.

Nigel’s final point is about a deep subject, measurement. He says what we choose to measure changes what we become.

The powerful effect of measurement on what is known is elegantly stated at the quantum level by the Hiesenberg Uncertainty Priniciple. The reality of a particle is unknown until you measure it at which time it “becomes” what you measure. If you measure position, you miss out on knowing the momentum and vice versa. When you change what you measure you directly change the reality of the particle you experience.

This principle seems to apply to people and the process of becoming as much as it does to electrons. Make your measurements balanced and the life you live will balance itself.