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Comments

Author Comment Last activity Moderation
gretchengehrke "For regulatory purposes, the EPA doesn't actually measure the size of individual particles. Rather, they use a pump with an impactor. This pumps in..." | Read more » over 3 years ago
gretchengehrke "Hi Nick, I can put you in touch with folks Lisa Rasmussen who put together a Citizen Science Ethics conference where co-ownership and equitable par..." | Read more » over 3 years ago
gretchengehrke "Hi Jackie, you should be able to have the IRB amended. Are the researchers willing to file an amendment with their IRB? " | Read more » over 3 years ago
gretchengehrke "Hi @liz, The SmART-Form project is a collaboration between engineering faculty at Ohio State University and Syracuse University, a public health n..." | Read more » over 3 years ago
gretchengehrke "The folks at San Francisco Estuary Institute (www.sfei.org) may be able to point you in the direction of a company or research group that may test ..." | Read more » over 3 years ago
gretchengehrke "Hi @rajanzaveri, What sorts of concentrations and what media are you interested in measuring? Do you have more specific constraints for measurement..." | Read more » over 3 years ago
gretchengehrke "Hi @Mempet, in my experience, submerged filters (and any equipment that is submerged) generally needs to be manually cleaned rather than using any ..." | Read more » over 3 years ago
gretchengehrke "Hi @Mempet, Could you use a turbidity tube like this one: https://www.carolina.com/environmental-science-water-quality/carolina-turbidity-tube-120-..." | Read more » over 3 years ago
gretchengehrke "That's such a good point @sarasage. That also ties into key elements about knowing your rights on public and private land and air space, states whe..." | Read more » over 3 years ago
gretchengehrke "Hi Patrick, I'm glad you brought this up and made space to talk about it. I actually think this is more about organization than anything else. I ag..." | Read more » over 3 years ago
gretchengehrke "There are a bunch of sensors commercially available through this vendor: https://www.grainger.com/category/ecatalog/N-1z0dwuc. Has anyone used one ..." | Read more » over 3 years ago
gretchengehrke "The spreadsheet in this research note by Jeff could have some useful ideas for data analysis platforms, and features to consider when selecting a p..." | Read more » over 3 years ago
gretchengehrke "There are a bunch of DIY microscopes listed in this awesome compilation: https://publiclab.org/notes/liz/09-28-2016/diy-microscope-resources, which..." | Read more » over 3 years ago
gretchengehrke "@MadTinker, this is really exciting, and such important work for the promotion of community-collected data. Since the data streams you are discussi..." | Read more » over 3 years ago
gretchengehrke "Hi @MadTinker, I agree that R has awesome functionality, AND I agree with you that the learning curve is quite steep. Have you ever used Plotly? I ..." | Read more » over 3 years ago
gretchengehrke "To add to @liz 's answer, the "criteria pollutants" are lead, ozone, sulfur dioxide, nitrogen oxides, carbon monoxide, and particulate matter. The ..." | Read more » over 3 years ago
gretchengehrke "Awesome, @Zengirl2. Thanks! " | Read more » over 3 years ago
gretchengehrke "Wow, thank you for this information @Zengirl2! Could you provide the paper citation here so we can look it up (since it didn't attach, and I honest..." | Read more » over 3 years ago
gretchengehrke "@donblair, I was just reading this again, and am again impressed by your elegantly simple approach -- such a great idea! It seems like this alterna..." | Read more » over 3 years ago
gretchengehrke "@bhikman, that integrated optical filter is neat, and surprisingly inexpensive! If you do pick this back up, I am super interested in seeing how we..." | Read more » over 3 years ago
gretchengehrke "Hi @bhickman and @ggallant! I was just reading this research note and comments again, and it sounds like such a promising project. Are there any up..." | Read more » over 3 years ago
gretchengehrke "@DavidMack, that's very true about the expense, but the lids are usually metal and so hard to clean. Depending on the analyte of interest, metal li..." | Read more » over 3 years ago
gretchengehrke "That's true Chris @cfastie! You read through to the heart of my internal question on this too: is it worth it to try to hack commercially available..." | Read more » over 3 years ago
gretchengehrke "@eustatic, That's a good point. Does GRN work with any folks who are employed by one of the oil companies? " | Read more » over 3 years ago