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Spencer Bliven
Works at UC San Diego
Lives in San Diego, CA
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Spencer Bliven

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I've never really solved oozing issues with my makergear hotend. I get lots of threading, slightly rough vertical walls, terrible bridges, and other signs of oozing. I've tried changing temperature, tweaking retraction, changing speeds, etc.

I've tweaked things enough that I'm considering hardware upgrades. I'm currently printing with 3mm PLA through a .5mm nozzle. Would switching to 1.75mm filament and a .35-.4mm nozzle be likely to improve print quality by reducing the reservoir volume and increasing extrusion volume accuracy?
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Nathan Walkner's profile photoSpencer Bliven's profile photoJason McMullan's profile photomarc kerger's profile photo
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try faberdashery filament, i find it oozes much less
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Tweet. I'm a fan of literate programming. When I'm writing a paper, I typically use LaTeX to draft the paper, Java to generate the data, and R to create figures and do basic analysis. With Sweave (or the more recent Knitr package), it is possible to easily add R code to LaTeX documents.
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Universal Pellet Extruder - Adventures in Granular materials - community project #3dprinting   #RepRap  
Pellets - Let's shake things up! A few months back I asked the question on G+, Would anyone like to discuss Pellet / Granular extruders? I ask because I have been working on various designs for quite some time with success an...
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Trippy interactive fractal
Project information and source code is released under GPL version 2 or higher. When applicable, all other project information is released under Attribution Non- Commercial Share- Alike 3.0 license. All original writing and artwork is © on the date of posting to the original post author.
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Someone should compile Darwin Prize and BAHFest entries and see if anyone can distinguish them.
The unexpectedly popular BAHFest searches for the year's most laughable evolutionary theory, and rewards its creator
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Have him in circles
121 people
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Douglas Myers-Turnbull's profile photo
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Takeshi Sasai's profile photo
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Spencer Bliven

General discussion  - 
 
Anyone know a european source of straight 3mm filament, suitable for use in a 3Doodler? I've read that trying to straighten out spooled filament doesn't work well, but the official price is ~$200/kg.
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Liam Jackson's profile photoSpencer Bliven's profile photoJeff DeMaagd's profile photoFred U.'s profile photo
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Fred U.
 
How practical is it to assemble a hot end with a nozzle drilled out to the correct diameter to match the 3doodler filament? The spooled filament could be manually pushed into the hot end, causing a straightening effect from the spool. It has been suggested in other forums that the 3doodler people have tighter control on the filament stick diameter. If the nozzle was the correct diameter, wouldn't it correct any minor variations in the spooled filament?

I expect it would be less difficult to construct something of this sort than it is to construct a filament extruder, as the spooled filament is nearly the correct size, rather than being pellets.

Considering the cost of the individual filament rods, there should be an economics benefit involved.
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Hilarious talk about programming language wtfs.
Wat. A lightning talk by Gary Bernhardt from CodeMash 2012. The sarcasm in this talk does not represent anyone's actual opinion. For a more serious take on software, try Destroy All Software Screencasts: 10 to 15 minutes every other week, dense with information on advanced topics like Unix, TDD, ...
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Congratulations to the BioJava team ( +Andreas Prlic +Spencer Bliven and many others ) on their latest release BioJava 4.0.

New Features:

General
• Consistent error logging. SLF4J is used for logging and provides adaptors for all major logging implementations. (many contributors, including @benjamintboyle and @josemduarte)
• Improved handling of exceptions (@dmyersturnbull)
• Removed deprecated methods
• Expanded the BioJava tutorial (@andreasprlic, @josemduarte, and @sbliven)
• Updated dependencies where applicable
• Available on Maven Central (@andreasprlic and @heuermh)

biojava3-core
Improved Genbank parser, including support for feature records, qualifiers, and nested locations. (@paolopavan and @jgrzebyta)

biojava3-structure
• Better support for crystallographic information, including crystallographic operators, unit cells, and protein-protein interfaces. (@josemduarte)
• Better organization of downloaded structure files (set using the PDB_DIR and PDB_CACHE_DIR environmental variables) (@sbliven)
Better command-line tools for structure alignment (@sbliven)
• New algorithm for symmetry detection in biological assemblies (@pwrose)
• New algorithm for fast contact calculation, both intra-chain and inter-chain (@josemduarte)
• Support for Accessible Surface Area (ASA) calculation through and implementation of the Shrake & Rupley algorithm, both single-thread and parallel (memory permitting) (@josemduarte)
• Support for large structures (memory permitting) and multi-character chain IDs.
• Default to mmCIF file format, as recommended by the wwPDB

This version is compatible with Java 6, 7, and 8.
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The Personal Genome Project is looking for San Diego volunteers to be sequenced. I would totally participate if I were in town.
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Wow, a nematode wirehead, living in a virtual world. We feed it false sensory data and let the worm drive its robot body around.
Next step: uploading a human brain into a computer.
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Impactstory will start charging $60/year for their service. Here's an interesting defense of the move. The best quote:

"Would you still use a free service if it costs $5/month? If the answer is no, it’s most likely a waste of time and you should not use it even if it is free."

Sadly, I'm not sure that Impactstory has demonstrated that it's worth the cost. I know they're trying to add new features, but for me it's still primarily an aggregation service.
Last week Impactstory announced their new paid subscription model. Changing a service from free to paid is a big step and there was some discussion on Twitter about it. We decided from day one to run Paperpile as a paid subscription service and only had good experiences with this model so far. We are lucky toRead more...
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People
Have him in circles
121 people
Mark Schreiber's profile photo
Douglas Myers-Turnbull's profile photo
Dick Fryling's profile photo
Takeshi Sasai's profile photo
Hillary Bliven's profile photo
Andreas Prlic's profile photo
Daniel Mietchen's profile photo
David Landsman's profile photo
Jan Schellenberger's profile photo
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Grad Student
Employment
  • UC San Diego
    Grad Student, present
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Bioinformatics PhD student at UCSD
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
San Diego, CA
Previously
Bellevue, WA - Zurich, Switzerland - Seattle, WA
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