84% of $1500 goal
Donate

Public Lab is celebrating our 5th anniversary! Become a Sustaining Member today to help us raise $1500.


mathew 687 research notes and wiki edits | Admin

Co-founder of public lab, balloon and kite nut. mdml.co/ @headfullofair


mathew was awarded the Watchdog Barnstar by amysoyka for their work published in Frac Sand in 10 minutes.


mathew was awarded the Photo Documentation Barnstar by amysoyka for their work published in a paper spectrometer design.


mathew was awarded the Basic Barnstar by Francis for their work published in a paper spectrometer design, pt 2.


mathew was awarded the Video Documentation Barnstar by amysoyka for their work published in CSI: Creek Scene Investigators -public lab tv-.


mathew was awarded the Basic Barnstar by liz for their work published in a history of crediting contributions.


can a surface sheen be collected for oil testing?

by mathew 18 days ago | 1 | 313 views | 2

image by by Cesar Harada CC-BY-NC-SA Can an oil slick be picked up off the surface and concentra...

Read more »

spectrometer oil oil-testing oil-testing-kit


Assembling the Oil Testing Kit Cuvette Frame

by mathew 18 days ago | 1 | 342 views | 1

This cuvette frame's design notes are here, along with previous versions and other design ideas. ...

Read more »

spectrometry laser fluorescence desktop-spectrometer


Designing an Oil Testing Kit Cuvette Frame

by mathew 18 days ago | 0 | 335 views | 3

I’ve been working to design an oil testing add-on the the spectrometer 3.0 incorporating the feed...

Read more »

laser fluorescence desktop-spectrometer oil-testing-kit


making PDFs from wiki pages

by mathew 25 days ago | 7 | 230 views | 0

Sometimes you just need information paper. In my case, I'm formatting wiki pages and research no...

Read more »

process curriculum plots2 how-to



a history of crediting contributions

by mathew about 1 month ago | 3 | 768 views | 3

photo credit @Stevie, Washington University students build camera rigs. Giving proper credit for...

Read more »

balloon-mapping spectrometer gmf mapping


sensors in soda bottles

by mathew about 1 month ago | 6 | 558 views | 2

What I want to do I want to keep electronics dry while wired to underwater sensors. I did a sho...

Read more »

housing water-quality water open-water


dealing with patents: Black & Decker and the Thermal Flashlight

by mathew 3 months ago | 6 | 550 views | 4

Update: actually, Black & Decker came up with this idea first and we just hadn't seen the thi...

Read more »

thermal-photography thermal-flashlight thermal-camera question:patent


shortlinks: putting contributors directly on a kit

by mathew 3 months ago | 3 | 747 views | 2

What I want to do I want to help users of Public Lab kits understand community research that goe...

Read more »

spectrometer community oil spectrometry



sketching a waterproof pop bottle sensor system

by mathew 3 months ago | 4 | 811 views | 0

What I want to do I want to make a way to reliably put sensors through the cap of a PET bottle. ...

Read more »

housing water-quality open-water openwater


CSI: Creek Scene Investigators -public lab tv-

by mathew 4 months ago | 4 | 1,388 views | 2

Public Lab TV starring @Eymund of the Gowanus Conservancy. Eymund explains how to find the chalk ...

Read more »

water creek tv openwater


a paper spectrometer design, pt 2

by mathew 5 months ago | 11 | 1,987 views | 3

What I want to do This is a substantial revision to an earlier design, which integrated a bunch ...

Read more »

spectrometer oil oil-spill-toolkit spectrometry


A DIY gas-finding camera?

by mathew 5 months ago | 11 | 1,029 views | 1

What I want to do Explore whether its possible to make a camera that can see VOCs, like the very...

Read more »

infrared camera



a paper spectrometer design

by mathew 6 months ago | 7 | 1,557 views | 3

What I want to do build a spectrometer that doesn't use a conduit box, out of mostly paper and c...

Read more »

spectrometer desktop-spectrometer fold-up dsk


notes on setting up a Dustduino

by mathew 6 months ago | 1 | 707 views | 3

What I want to do setup a Dustduino per Matthew @Schoyer's instructions My attempt and results ...

Read more »

air-quality dustduino dust silica


Frac Sand in 10 minutes

by mathew 6 months ago | 7 | 1,140 views | 6

photo credit: Crispin Pierce PhD What I want to do I made a 10 minute video introducing what fr...

Read more »

air-quality air monitoring dust


shorter spectrometer geometry with two slits?

by mathew 7 months ago | 3 | 963 views | 2

What I want to do answer two questions: Can straylight be eliminated in a simple spectrometer se...

Read more »

spectrometer oil-testing-kit



Graded oils using UV fluorescence

by mathew 7 months ago | 22 | 1,234 views | 1

What we want to do Me and @Warren are trying to replicate the heavy to light sorting of oils, a...

Read more »

spectrometer oil fluorescence spectral-workbench


Replicating the Grading of oils with UV Fluorescence on other cameras pt 1

by mathew 7 months ago | 4 | 764 views | 0

What I want to do replicate the results of my previous note using different other cameras. I wa...

Read more »

spectrometer fluorescence oil-testing-kit 405nm


Grading oils with UV fluorescence

by mathew 7 months ago | 5 | 762 views | 0

What I want to do I want to be able to grade oils from light to heavy. I'm going to use a means ...

Read more »

spectrometer laser fluorescence crude


Laser Pointers and the LIF Literature

by mathew 7 months ago | 1 | 1,181 views | 1

*LIF stands for Laser Induced Fluorescence. What I want to do I want to answer three questions ...

Read more »

spectrometer uv laser fluorescence



Fluorescence spectroscopy with the foldup + gelcap

by mathew 8 months ago | 4 | 739 views | 1

What I want to do See bright fluorescence spectra with a fold up. My attempt and results While...

Read more »

spectrometer uv fluorescence fold-up


Using Gelatin Caps for oil fluorescence

by mathew 8 months ago | 19 | 1,388 views | 2

What I want to do see if we use gelatin caps as sample containers. They cost a few cents each, ...

Read more »

spectrometer oil fluorescence cuvette


Getting a high altitude balloon back

by mathew 8 months ago | 4 | 830 views | 0

What I want to do fly a high altitude balloon and get it back. This means tracking where it goe...

Read more »

balloon-mapping solar-balloon mapping balloon


Clips for the next spectrometer, pt 2

by mathew 8 months ago | 3 | 874 views | 1

What I want to do try out some clips I bought and figure how they fit in a new spectrometer desi...

Read more »

spectrometer oil-testing-kit



Low-cost passive aerosol monitors

by mathew 8 months ago | 4 | 1,153 views | 1

What I want to do Summarize the literature on low-cost passive particle monitors tha can produce...

Read more »

air-quality dust particulates silica


Clips for the next spectrometer

by mathew 8 months ago | 4 | 816 views | 1

What I want to do find and test a clip that works with the bench design @warren and I brainstorm...

Read more »

spectrometer oil-testing-kit


State of the Science: The Oil Testing Kit

by mathew 9 months ago | 3 | 1,139 views | 3

What we want to do I sat down with @warren to record a video presentation on the state of the oi...

Read more »

spectrometer video oil-testing-kit with:warren


Karen's comments on the spectrometer instructions

by mathew 9 months ago | 1 | 726 views | 0

Karen assembled a desktop spectrometer and commented the instructions during our 7/31 workshop.

Read more »

spectrometer assembly desktop-spectrometer desktop-spectrometer-assembly



Hardware design work for the Oil Testing Kit

by mathew 9 months ago | 13 | 1,196 views | 2

A hardware sketch of our favorite configuration is above. _This is a jointly authored research no...

Read more »

spectrometer kits fluorescence desktop-spectrometer


A Retrospective of Spectrometer Design Ideas 2011-2014

by mathew 9 months ago | 0 | 1,574 views | 0

Here is a history of public lab spectrometer research ideas up to the present. There is really n...

Read more »

spectrometer overview retrospective