Community research

thechan commented on Introducing Pi Builder 2 months ago

I just flashed the latest image onto a Pi Zero W and the browser livestream works as advertised. ...

Ag8n commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

The TCD is a thermal conductivity detector. It's an attempt at a " universal" detector- that is ...

jjcreedon commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

Here's a portable GC, but has a TCD detector.. not the same. https://www.agilent.com/cs/library/b...

kgradow1 commented on Outreachy Proposal: Optimize Performance and Accessibility of Public Lab Content. 2 months ago

@jywarren thank you jeff!

stevie commented on MiniVol for gas sensing? 2 months ago

Hi! as fas as I know MiniVols can really only be used for PM, understanding the makeup of that PM...

warren commented on Outreachy Proposal: Optimize Performance and Accessibility of Public Lab Content. 2 months ago

I just read about new accessibility analysis features in chrome, could be of interest! https://w...

itm2017004 commented on Outreachy Proposal: Optimize Performance and Accessibility of Public Lab Content. 2 months ago

@jywarren Sure! Will look into this and comment when I have weighed in the pros and cons.

warren commented on Outreachy Proposal: Optimize Performance and Accessibility of Public Lab Content. 2 months ago

@kgradow1 - check out the section above on printability of wiki pages and notes! @itm2017004 i j...

jjcreedon commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

Katie- Just received your email. will respond there about Tonawanda Coke. re: the GC/MS its a sta...

pataxte commented on mapknitter exports are very small scale, unreadable 2 months ago

Thanks @liz! Yup, it is http://mapknitter.org/maps/2020_bean_bed/ I am trying to print just the c...

Ag8n commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

Ok, it's a question of the process and how much you know about it. If you know everything that's...

kgradow1 commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

My question is really about current workflows for gas chromatography / mass spectrometry for envi...

kgradow1 commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

Is GC-MS still typically done in a lab or are there versions that can be done in the field?

subir commented on What air pollution patterns do you see? 2 months ago

Thanks @Liz ! I will be happy to share any details required for building it. Wouldn't it be wonde...

Ag8n commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

VOC just tells you the amount of volatile organic carbon, not the specific molecule. If the voc ...

kgradow1 commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

@Ag8n gc/ms is the standard way that bucket samples have been analyzed in the past, but it's expe...

Ag8n commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

We had a gas sampling valve on our gc/ms. This could be used for gas analysis, but was usually u...

kgradow1 commented on Have you used the bucket air sampler or other grab sample tool? 2 months ago

@jjcreedon, thank you! Are you still using buckets today? I'd love to hear more about your exp...

milwaukeeconcrete commented on How do I... find more information about soil sampling 2 months ago

Wow what great resources on soil testing! I run a local concrete company and honestly you'd be su...

stevie commented on Can we use a Purple Air through a VPN? 2 months ago

Hello again, wanted to share a response from our friends at Purple Air:: "Using a VPN has nothin...

patcon commented on Can we use a Purple Air through a VPN? 2 months ago

If the device connects directly to WiFi, then I think a specially configured VPN router might be ...

kgradow1 commented on Public Lab's Microscope Set-up 2 months ago

This looks awesome! Also well illuminated. Did you use a cover sheet for the sample or is this ...

liz commented on Can we use a Purple Air through a VPN? 2 months ago

Looks like Purple Air connects directly through the WiFi network: https://www2.purpleair.com/page...

liz commented on Is there a way to convert an infrared video footage to NDVI? 2 months ago

Hi @Sam14, Image Sequencer has experimental support for processing gifs: https://github.com/publi...

liz commented on What is the actual yield of a precipitation reaction between 1.50 grams sodium carbonate and 2.50 g of calcium chloride? 2 months ago

Hi @Sonia_2000, I hope you have found a way to progress through this question! This type of assig...

liz commented on Problem whit workbench spectra. Unable to manipulate(work) whit any image 2 months ago

Hi Damian, Sorry to hear of this trouble! Tomorrow, and every Tuesday at 3pm ET / 7pm GMT, find u...

liz commented on Have you used surveys to inform open hardware development? 2 months ago

Hi @Katie, i believe we have done something related, but not exactly what you are inquiring about...

joyofsoy commented on A frac sand mine recently blasted 140 holes in a day. What might they be doing? 2 months ago

The quote is suspect. Unless the mine has been lined with clay or with plastic, internal drainage...

joyofsoy commented on A frac sand mine recently blasted 140 holes in a day. What might they be doing? 2 months ago

My response in the thread: From this article, I learned: As of January 2019, the quarry was prod...

joyofsoy commented on A frac sand mine recently blasted 140 holes in a day. What might they be doing? 2 months ago

This is likely a contracted blasting service where the blasting company drills a "grid" of 5.5-6....