Doctoral Leaflet

Published by Zane Selvans on November 2nd, 2009 in journal, personal and professional. 4 Comments Tags: , , , , , .

It seems a bit of Vaudeville is still lingering around the Academe…

THE GRADUATE SCHOOL
of
THE UNIVERSITY OF COLORADO AT BOULDER

DISSERTATION DEFENSE
of

Zane A. Selvans

FOR THE DEGREE
DOCTOR OF PHILOSOPHY

Date/Time: 2:30pm, Friday, 20th November, 2009
Bldg./Rm: Benson Earth Sciences (BESC) 380

Examining Committee Members:

  • Karl Mueller
  • John Wahr
  • Robert Pappalardo
  • Bruce Jakosky
  • John Spencer

OUTLINE OF STUDIES

Major Field: Geological Sciences

BIOGRAPHICAL NOTES

A descendant of Dust Bowl migrants, Zane grew up near Fresno in California’s San Joaquin Valley. He left as soon as humanly possible, and got his BS in Computer Science at the Caltech in Pasadena. After a brief stint working in Silicon Valley (which unfortunately did not result in any kind of dot-com stock option fortune), he returned to Caltech via sea kayak to work with Mars Global Surveyor data, mapping Mars’ south polar layered deposits. While he has been a student at CU Boulder since the fall of 2002 you may not have seen much of him lately, because in early 2006 his wife and advisor both moved to Caltech/JPL, and like a long period comet, he slid back down into that place’s deep potential well to be with them. Next year, Zane intends to spend a lot of time on his bicycle.

THESIS

Time, Tides and Tectonics on Icy Satellites
Faculty Advisor: Karl Mueller

ABSTRACT

In the outer solar system, we cannot directly use the radiometric dating techniques widely applied in terrestrial geology. We also lack the detailed understanding of the correspondence between crater size-frequency distributions and absolute ages that the radiometric dating of lunar samples has given us in the inner solar system. Additionally, many geologically interesting surfaces on the icy satellites are insufficiently cratered to allow us to infer precise relative ages. Thus it is desirable to find other ways to construct geological chronologies that function well in the outer solar system. In this work I develop two techniques.

The first compares the linear tectonic features covering Jupiter’s moon Europa to modeled tensile fractures resulting from tidal stresses due to the non-synchronous rotation (NSR) of the satellite’s decoupled, icy, lithospheric shell. The amount of shell rotation required to align a feature with the stress field resulting from NSR is used as a proxy for time. This translation is potentially convolved with a phase lag between the tidal potential and the stresses it induces, resulting from the shell’s partially viscous response to the NSR forcing. The geography of individual lineaments is found to be no more consistent with NSR stresses than chance would predict, however, the ensemble of global lineaments displays a non-uniform apparent rate of lineament formation throughout the time period recorded by the surface. This non-uniformity may be explained either by steady state fracture formation, activity, quiescence and erasure, or by a transient episode of tectonics.

The second technique encodes the myriad superposition relationships evident between Europa’s tectonic features as a directed graph enabling algorithmic analysis. The observed superposition relationships are generally insufficient to construct complete stratigraphic stacks, but we can calculate the degree to which they corroborate or contradict another hypothesized order of formation. We find that they tend to corroborate the hypothesis that the lineaments are tensile fractures due to NSR stresses.

Together these results offer cautious support for the idea that Europa’s shell rotates independently of its silicate interior, and demonstrate techniques useful in comparing tectonic features on other icy satellites to hypothesized mechanisms of formation.

Stop framing transportation and bicycles as identity politics

Published by Zane Selvans on October 14th, 2009 in letters. 1 Comment Tags: , , , , , , , .

Hello Mr. Mason,

I just read your article For the Danes, city planning is all about the bike.  As a daily bicycle user and advocate in automobile dominated southern California, I couldn’t help but be disturbed by the tone which was set in the first two sentences:

From his second-floor office overlooking a Baltic-fed canal, Andreas Rohl ponders a daily question: How can he make life hell for the car drivers of this Scandinavian capital? Mr. Rohl, you see, is the bicycle program manager for the city government of Copenhagen.

Based on the quotes you took from him throughout the rest of the article I have a hard time believing that this is really how Rohl thinks about his job.  It seems like a much more North American perspective on bicycle planning to me. Making these the first words in the article creates an antagonistic lens through which the reader sees all the examples you point out of resources being shifted from cars to bikes, especially if the reader uses a car as their primary means of transportation, as I suspect most of your Canadian (and US) readers do.  It would be a very different article if instead you’d said “How can he make life easier for the bicycle riders of this Scandinavian capital?”  (I’m really curious, do you primarily drive, or ride a bike to get around?)

When there is a finite resource that has to be shared between cyclists and cars, such as lane width or timing priority on the “Green Wave” streets, a rational transportation planner would ask themselves “How can I allocate this resource between the competing modes to most effectively meet my transportation goals?”.  What cities like Copenhagen and Amsterdam and Groningen have decided, I think correctly, is that quite often transportation goals can best be met by
allocating more of these finite resources to bikes than we do in the US and Canada.  In an urban environment, per unit transportation utility, bike infrastructure is much cheaper than automotive infrastructure to build and maintain.  The vehicles it supports (bikes) are also cheaper, safer, quieter, do not pollute or rely on imported fuels, and contribute to the health of the general population, reducing health care costs.  Parking for bikes takes up an order of magnitude less real estate and money, making multi-modal public transit much more feasible.  All of these are functional, dispassionate reasons to shift planning priorities toward bikes and away from cars.

The antagonistic framing that your introduction sets up, and which unfortunately also permeates a great deal of bike culture and bike advocacy in the US, does not help anybody make rational, dispassionate transportation decisions.  It encourages the reader to pick a side. It turns transportation choices into issues of identity.  Am I a driver, or am I a cyclist?  Really, we’re all just people trying to get somewhere, and I think the Dutch and the Danes understand that better than anyone, as your final sentence makes clear.

Sincerely,
Zane Selvans

CC: Andreas Rohl (Copenhagen Bicycle Planner), Mikael Colville-Anderson (Copenhagenize), Dale Benson (Caltrans District 7 BAC)

Pasadena Bicycle Master Plan Meeting October 1st

Published by Zane Selvans on September 18th, 2009 in journal and public. 0 Comments Tags: , , , , , .

Message from the City below, linkage courtesy of yours truly.  Unfortunately I’ll be out of town, so hopefully others will be able to attend and take notes and post them on the web, as I have done here, and here, and here (okay, actually that third link goes to a rant…).  I’m posting the info here because strangely, it does not seem to be posted anywhere on the City’s website.  Funny that.

Ryan Snyder Associates, consultant, will provide a progress report on the development of the City’s new Bicycle Master Plan. An open forum will be held to gain public comment on the proposed improvements to the current bikeway system.

When:

Thursday, October 1, 2009 – 6:30 to 8:30 p.m.

Where:

Jackie Robinson Center
1020 N. Fair Oaks Ave.
Pasadena, CA

Hosted by Department of Transportation and
the Bicycle Master Plan Advisory Committee

More Info:

Contact Rich Dilluvio at (626) 744-7254 or rdilluvio@cityofpasadena.net.

An updated plan will look at the full range of actions (PDF) Pasadena could take to improve conditions and encourage bicycle riding

Amateur Earthling on Hiatus

Published by Zane Selvans on August 24th, 2009 in journal, personal and professional. 1 Comment Tags: , , , , , .

I have lots of draft posts in progress here on the back end, calling to me whenever I log in like internet sirens:

  • The Scale and Form of Cities, about how one might design a city from the ground up today, with efficient resource utilization and conviviality in mind.  A follow up to What Are Cities For?
  • Corporate Paternalism, about the ways in which we (especially conservatives) seem to have more faith in corporations than our elected representatives when it comes to making decisions for us.
  • Our Newtonian Hangover, about the non-linear, non-deterministic nature of history and technology, and James Burke’s excellent BBC series The Day the Universe Changed and Connections.  Miraculously, they are almost as relevant today as they were 30 years ago, and we are in the process of implementing one of the strange futures he foretold.
  • The dunes told me to work on passive buildings, which is a more personal and spiritual response to the NREL interview questions than seemed appropriate for a job interview.
  • and a magnum opus entitled What’s Wrong With Graduate School, that examines both how my own graduate career has been uniquely flawed, why I believe the graduate education system as a whole is in general broken, and a vision of what I think higher education might look like by the time any offspring I could conceivably have would be there.

However, at the moment the thing most wrong with graduate school is that I’m still in it.  My PhD defense has been tentatively scheduled for November 20th, and I’m going to the AGU fall meeting in San Francisco in mid-December to present my work, so I’m going to be completely occupied until the beginning of 2010.  There will be no further blog updates between now and then.  Or at least, there shouldn’t be.  If you see me making posts, don’t read them.  Instead ridicule me in person, or offer up some kind of digital castigation.

Of course, you can still read my mind keep in touch with me via my linkstream, my tweets, and my photos.  Oh, and of course there’s always e-mail and the telephone.

For Love of Information

Published by Zane Selvans on August 16th, 2009 in journal and personal. 4 Comments Tags: , , , , , , .

An analog thread in the digital world

I’m a little bit of an information pack rat.  I started blogging before there were blogs, from UGCS.  It seemed mildly neurotic and self involved and exhibitionist at the time.  I mostly did it for my mom as a way to keep in touch without having to e-mail all the time.  I’ve lost information here and there, even digital information (which seems kind of unforgivable), but analog too.  Actually, I think more I just didn’t create much analog information.  Five intense months of life, bicycling across Europe in 1994.  Maybe 2 rolls of film total?  Almost no photos from my summer in Russia.  Both my parents were avid photographers.  My dad professionally (though eventually he tired of the weddings and quinceañeras, and retreated to a steady stream of passport and similar photos… para las micas rosas, y para amnestia…) and my mom (so far as I can tell) more personally.  Family pictures, documentarian style, wildflowers, and some prizes in the Fresno County Fair.  But I never got into it, until I got a digital camera in 1999.  My first piece of digital film was a 64 MB compact-flash card (incredibly, several times larger than the 20 MB hard disk in my first computer, which I got in 1993).  It cost about $100.  The camera was a Nikon Coolpix 700, with 2.1 MP sensor and no zoom.  I bought it in an online auction (at Yahoo!) for $425, but had the seller leave me feedback at eBay (you could leave anyone feedback for anything back then).  I mailed the check, and he mailed the camera, simultaneously, trusting each other.  I still have our e-mails.  The pictures could go directly to the web… via the web server I had running in my bedroom in Santa Cruz.  I still have those pictures.  No developing.  No cost-per-click of the shutter.  Kayaking through Southeast Alaska with Becky in the summer of 2000 I had to limit the resolution to 640 x 480 to avoid running out of space over 3 months, and I couldn’t use the LCD lest I run out of batteries, but at least I took the pictures, and kept them.

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The Tragedy of the Marine Commons

Published by Zane Selvans on August 12th, 2009 in journal and public. 2 Comments Tags: , , , , , .

I’ve made this parody before:

Give a man a fish, and he’ll eat for a day.
Teach a man to fish, and he’ll eat until the fish are extinct.

All indications are that our grandkids won’t be big fans of sashimi, as it will either be too expensive for them, or virtually non-existent, because we have driven the large fish species to (or near) extinction.  We’ve been making fish smaller, and less plentiful for millennia.  This is no huge surprise.  We ate all the tasty North American megafauna when we got here too.  We were hungry, and we didn’t know any better.  The world and its resources seemed vast beyond our comprehension.

Bluefin tuna in Tokyo fetch $25,000 each.
Attribution-NonCommercial-ShareAlike License by Sanctu

The situation today is tragic partly because we know exactly what we’re doing, and partly because we could be sustainably harvesting vastly more fish today than we are currently mining at an unsustainable rate, if only we could somehow contrive to let fish stocks rebound to their Pleistocene levels.  At those very high (pre-human) stocking rates, the sustainable take would be enormous, but we would have to manage the harvest carefully with quotas (which we didn’t do the first time around, and which we are much better equipped to do now).  Such quotas are sometimes discussed as if they were purely economic or political quantities, but in some important ways they are neither.

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California traffic signals should detect bikes

Published by Zane Selvans on August 10th, 2009 in letters. 5 Comments Tags: , , , , , , .

Hello Mr. Singh,

As a person who uses a bicycle as almost my only form of transportation, not being detected by traffic signals often makes me feel like some kind of outlaw, even though I am very explicitly operating my vehicle within California law. This difference between the letter and the implementation of the law contributes to the mistaken perception, by drivers, law enforcement officials and cyclists alike, that bikes somehow have both fewer legal rights and less responsibility to obey the rules of the road.

It has come to my attention that there is nobody on the California Traffic Control Devices Committee (CTCDC) who represents the interests of the non-motorized elements of traffic, though there are multiple representatives from the state’s automobile clubs. Under AB 1581 (now CVC 21450.5) bicycles are entitled to be detected by the devices that CTCDC oversees, but with no representation on the committee it seems unlikely that the decisions it takes will reflect our needs. Many other jurisdictions (e.g. Copenhagen, Denmark) that have decided to incorporate cycling meaningfully into their transportation networks have successfully solved the technical problems associated with detecting and directing the flow of bicycle traffic, and so I do not feel that “we don’t have the technology” is really a viable excuse. What we lack is the political will, and I think that having some direct representation of non-motorized traffic on the CTCDC would help facilitate finding that political will.

Sincerely,
Zane Selvans

CC: Ken McGuire (Caltrans Bicycle Program Manager)

Green bike locked to cherry tree in Little Tokyo

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Does this look Freegan to you?

Published by Zane Selvans on August 8th, 2009 in journal, personal and public. 5 Comments Tags: , , , , , , , , , , , , , .

Why are labels so attractive?  One word shortcuts for frugal thinkers.  Am I a freegan?  What would that mean exactly?  Who curates the definitions of our cultural -isms?

Do we look like freegans?

Reading through the Wikipedia article on Freeganism (which is as close to a cultural consensus on anything as I think we get these days), it seems like I’m close.  Except that I’m not fundamentally opposed to eating meat (it’s the environmental degradation, antibiotics resistance, health detriments, and massive resource consumption involved in meat production that get to me… but a little free meat from the dumpster?  Tasty!).  I also have a soft spot for shiny new laptops and other information technologies, and I believe in the greed based toolkit of money, markets, and open competition as a way to foster innovation.  But I also love composting, and creative re-use, and free non-materialist forms of entertainment and recreation like reading, and writing, and cooking from scratch, and I believe that unmitigated greed, and thus so-called laissez-faire (or perhaps in many cases more accurately crony) capitalism, left unchecked, are in the end destructive forces.  Greed and self-interest are kind of like dynamite: the right amount in the right place is a wonderful tool.  Too much, or even small amounts in bad places, and you’ve got a mess.  So how do I respond to an e-mail like this:

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Will there be no more public Pasadena Bicycle Master Plan meetings?

Published by Zane Selvans on August 3rd, 2009 in journal, letters and public. 2 Comments Tags: , , , , , , , , , , .

That’s what the advisory commission rumor mill is saying anyway.  I hope we can ensure that the gossip is wrong.

In February the Pasadena Department of Transportation said that we would have four (count ‘em: 4) public meetings or workshops throughout the spring to get input on the Pasadena Bicycle Master Plan, and that a draft would be finished by around June.  I posted a summary of the meeting.

We have so far had one workshop, in May, which many people felt was not adequately publicized beforehand (the City did not, for instance, send an e-mail to the list of interested parties it had collected at the first meeting, which it did use to get more than 1000 responses to the online Pasadena cyclists survey).  At the workshop we were told that a second draft of the new plan’s goals, objectives, and actions would be posted on the web within one week, incorporating our feedback from the workshop.  I posted the first draft of these items with commentary.

No Cars In The CityNo Cars in the City (CC-BY Zane Selvans)

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Colorado Dreaming and the Two Body Problem

Published by Zane Selvans on August 2nd, 2009 in journal and personal. 1 Comment Tags: , , , , , , , , , .

While we were both in Colorado last winter, Michelle and I talked a lot about the emotional and physical logistics of moving back there permanently.  Our two body problem.  Location, career or love, (like sleep, good grades or a social life): pick two.  We tried to write an outline of all the decision points we might face.  A decision tree.  It became a mess.  Then we started writing it as a Python program, with zane and michelle objects, and method calls like zane.findjob(loc="boulder").  But it’s not really that kind of problem.  It’s not deterministic.  This is decision making under uncertainty.  Strategic and emotional, not entirely susceptible to reason.  It really stopped being an academic problem when I got the interview with NREL, and it seemed to go well.  Even if I don’t get the job (they still haven’t said one way or the other, as of mid February August), it was certainly a useful exercise in the sense that It made us think and feel through the realities of what doing something like that would mean.

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