# Recent Activity

1. ### Felipe Lincoln replied to the thread Analysing a double capacitor circuit with no battery.

Hm.. I just know how to deduce each of them, V, Q and I and how to apply them into a trivial case, battery, resistor and capacitor. This...

May 25, 2018 at 12:14 PM
2. ### Tech2025 liked berkeman's post in the thread B Cell Phone Tower Cell Spacing.

Multipath issues can exist even if you are not near a reflecting surface. If there are multiple paths that transmissions can take...

May 25, 2018 at 12:13 PM
3. ### iJake replied to the thread [Linear Algebra] Another question on subspaces.

Yes, of course, and I do. Of course, I responded hastily and did not consider that, naturally, the equality doesn't hold if $b_n$ =...

May 25, 2018 at 12:13 PM
4. ### berkeman replied to the thread B Cell Phone Tower Cell Spacing.

Multipath issues can exist even if you are not near a reflecting surface. If there are multiple paths that transmissions can take...

May 25, 2018 at 12:13 PM
5. ### BillTre liked jim mcnamara's post in the thread Dietary supplements database from NIH.

Here is nice data set and analysis - example analysis:...

May 25, 2018 at 12:10 PM
6. ### StoneTemplePython replied to the thread Computational Python -- recommended books.

Yea, you can get surprisingly far on even more primitive things like print statements, but at some point will need to use the debugger....

May 25, 2018 at 12:07 PM
7. ### BillTre liked TTauri's post in the thread Sequestering Carbon Dioxide in Rock.

I am yet to hear of a project for mitigation being "sidetracked" as someone had went off to work on sequestration. Some of the...

May 25, 2018 at 12:07 PM
8. ### Janosh89 liked fresh_42's post in the thread B Spending lots of time writing notes for trivial explanations.

I meant that the books @mathwonk has mentioned are all very good books and milestones in the history of mathematics. The fact that they...

May 25, 2018 at 12:07 PM
9. ### berkeman replied to the thread Analysing a double capacitor circuit with no battery.

Well, then following Orodruin's hints, are you familiar with the differential equation that relates the current through a capacitor to...

May 25, 2018 at 12:05 PM
10. ### fresh_42 replied to the thread [Linear Algebra] Another question on subspaces.

More important is whether you've understood why this must be shown. This equality doesn't hold. What if $a=(1,2,3,0,0,\ldots)$ and...

May 25, 2018 at 12:04 PM
11. ### BillTre replied to the thread Observe pH Damaged Cells Via Microscope?.

Yes. There are, as I understand it, several different kinds sold by different companies. There is also non-fluorescent versions, like...

May 25, 2018 at 12:03 PM

I can relate one with other through the stored energy, but I don't think the energy conserves so I can use $\frac{1}{2}Q_0^2/C_1 =... May 25, 2018 at 12:01 PM 13. ### mathwonk replied to the thread I Generating modules and sub modules Blyth Theorem 2.3. Just repeating what fresh said essentially. I.e. Blyth didn't make clear quite what he meant. He is not changing the definition of... May 25, 2018 at 12:00 PM 14. ### iJake replied to the thread [Linear Algebra] Another question on subspaces. I must say I got a good chuckle out of "it all looks goofy." It looks like you've basically resolved this for me.$\sum_n |a_n| +...

May 25, 2018 at 11:57 AM
15. jim mcnamara posted a new thread.

### Dietary supplements database from NIH

Here is nice data set and analysis - example analysis:...

#### Forum: Biology and Medical

May 25, 2018 at 11:55 AM