| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "I don't misunderstand this note, Jeff. It has two sections: a diagnosis of the problem of research note posting, and a proposed remedy-- working on..." | Read more » | about 9 years ago | |||
| mathew | "Since our inception, looking at and using Markdown has scared off posters-- and I know this because people have been telling me this for four years..." | Read more » | about 9 years ago | |||
| mathew | "@DavidMack Now we're talking! I've done this before to measure higher volume airflow, but never thought to add the pop valve. I really like that. ..." | Read more » | about 9 years ago | |||
| mathew | "@Jimsford. you gotta print one! Shapeways could run one for you. " | Read more » | about 9 years ago | |||
| mathew | "this setup will flow 9 liters in 30 minutes, +/- variation in the tubes. I worked to isolate that variation to the tubes, and @gretchengehrke and ..." | Read more » | about 9 years ago | |||
| mathew | "@DavidMack Good catch! My notebook measures test 2 at 38.78, right next to 39.78 for the next test! I edited the note. thanks! You're right abou..." | Read more » | about 9 years ago | |||
| mathew | "If flow/water speed and pressure/descent was being measured too then those measurements could be used to generate approximate locations between GPS..." | Read more » | about 9 years ago | |||
| mathew | "awesome! " | Read more » | about 9 years ago | |||
| mathew | "@nshapiro is right, there is no low cost speciation of dust particles. That is usually done in a mass spectrometer or x-ray diffraction spectromete..." | Read more » | about 9 years ago | |||
| mathew | "Awesome summary of the kites! I've had good luck with a french signal kite but only when it had a long (15' of string) drogue tail attached. it d..." | Read more » | about 9 years ago | |||
| mathew | "ran some tests on the different Kitagawa tubes that have been used. I put the end into the drilled-out brass tube I've been using to break them, a..." | Read more » | about 9 years ago | |||
| mathew | "I bought and tried a 50ml pipette and made a dropout jar. The jar kind of works-- some condensation still seems to get through, but never bubble..." | Read more » | about 9 years ago | |||
| mathew | "Just repeated this test today at 26 degrees, and temperature corrected we got 25ppb. So good news: consistency. Bad news: consistently hazardous c..." | Read more » | about 9 years ago | |||
| mathew | "ok, looking at a photographic record of the flow rate between the two rotameter measurements it does seem like the change in flow is noticeable. F..." | Read more » | about 9 years ago | |||
| mathew | "@danbeavers I couldn't find that little heart. It may have been lost when the box arrived. @davidmack I ran the VWN rotameter with the valve all t..." | Read more » | about 9 years ago | |||
| mathew | "rotameter on the table reading .25L/m rotameter on a block of foam for vibration isolation, reading .3L/m " | Read more » | about 9 years ago | |||
| mathew | "hmmm.... the level of the rotameter goes and stays at .3L/m when I hold it down to the table at a level point. the vibration of the pump and level..." | Read more » | about 9 years ago | |||
| mathew | "I ran a test in our kit packing area and found 26ppb of formaldehyde. while running the test, a Rotameter from VWR arrived in the mail. I hooked ..." | Read more » | about 9 years ago | |||
| mathew | "I ran a formaldehyde test over by our shipping station, now that the flow on our lending kit is calibrated. We got 26ppb, or about 3.5x the chroni..." | Read more » | about 9 years ago | |||
| mathew | "Our portland office has .026ppm (26ppb) of formaldehyde when measured over by our packing and shipping area. That's over 3 times the chronic dange..." | Read more » | about 9 years ago | |||
| mathew | "I broke the tip off the tube with a pair of pliers. I do need a proper tip breaker-- my method left a good mess. " | Read more » | about 9 years ago | |||
| mathew | "Can i get a 250ml pipette? My choice of graduated cylinder volume was based on a desire to make the time period I measured long enough that my reac..." | Read more » | about 9 years ago | |||
| mathew | "the pump's output seems fairly consistent without a warm-up. I wanted to see if the setup retained its configuration from yesterday, so I ran thre..." | Read more » | about 9 years ago | |||
| mathew | "hi! could you please post only research notes that you are looking to share with our community? your experimental spectra belong on spectralworkben..." | Read more » | about 9 years ago |