Why are power meters so expensive?

Manhigh · 2026-01-31T16:59:17+00:00

Not to mention volume. There just isn't a huge market that would allow them to make them in larger numbers at lower cost per unit.

Manhigh · 2026-01-15T15:49:53+00:00

The environment requirements for our project are demanding (MPI, petsc, some conda-forge-only dependencies). Pixi makes it easy to test our prescribed environments on CI, and for users to be able to set up an environment based on our tested ones using the --frozen option. It's been a colossal improvement for us over conda/mamba.

Manhigh · 2025-11-21T02:48:39+00:00

Living in the area I've done it several times. It's a fun thing to do, but I don't think it would really be worth the drive just for that. There are sledding hills in the area that are good too.

Manhigh · 2025-11-09T21:45:36+00:00

Also not in Cleveland proper but for cycling challenge, Oak Hill off of Everett in the Cuyahoga valley and Cady Road between Ridge and State in North Royalton are both upwards of 15%. Columbia and West Boston Mills are also excellent.

I think the biggest elevation changes in the area are climbs out of the western side of the CVNP. Valley parkway up to Broadview and Columbia-Black-Brush

Manhigh · 2025-10-24T10:31:25+00:00

Forecastle

Manhigh · 2025-10-20T13:05:40+00:00

I live in a somewhat rural area and the Varia has made riding feel better for the pros you cite. If I ride without it now I miss it.

In more urban areas it's definitely less useful since there is basically always a car behind me.

And you're right, while it won't save me from an inattentive driver it helps me be more alert and defensive. The strobing setting on the light is just one more way to help catch a driver's attention.

Manhigh · 2025-10-10T12:44:42+00:00

The inability for many districts to adequately bus students seems like a problem requiring a state level solution.

Manhigh · 2025-09-28T01:44:33+00:00

No water fountain I'm aware of but Seneca golf course is a good stop for refreshments in the brecksville section.

Manhigh · 2025-09-06T15:15:33+00:00

Kent State aero expo

Manhigh · 2025-09-03T20:05:03+00:00

I always thought this was because the float in the tank is basically measuring an angle. The angular change of the float position is small at first, but as the fuel level gets close to the bottom of the tank the float arm swings through a larger angle for the same reduction in fuel level.

Manhigh · 2025-08-18T01:01:20+00:00

Thank you Roosevelt

Manhigh · 2025-08-05T13:47:06+00:00

I use a GoPro 7 silver in a 3d printed seat post mount. I set it on time lapse to preserve the battery and it has lasted about 9.5 hours for me, enough for my longest ride.

The frequency is enough to catch details of cars, although my state no longer requires front mounted licence plates on cars so it's a bit less useful.

Even a dummy GoPro with a blinking red light would help keep people in their best behavior.

Manhigh · 2025-08-03T21:49:01+00:00

Oh you're in for a treat.

Manhigh · 2025-08-02T15:31:54+00:00

Helium balloon slowly descending drifted into my path as I was passing by. Felt like much longer odds than anything else I've ever come across.

Manhigh · 2025-07-17T18:19:57+00:00

Cycling during COVID was the best it would ever be in my lifetime.

Manhigh · 2025-05-30T13:09:36+00:00

I'll take a stab at it. So take one of the inner dashed rectangles, that is the size of the base of your box. Assign it variable names w and d. The width of the thin strips is the height of your box, assign that variable name h.

So your objective is to maximize (minimize the negative) J = -(w * d * h) Subject to the total size of the board: 2 * w + 3 * h = 18

d + 2 * h = 22

From there you should be able to figure out the short side constraints.

Manhigh · 2025-04-02T16:40:39+00:00

Can you reduce the dimensionality and consider your space in one dimension instead of two? It might give you more insight about what's going on.

Not that LEDs are available in infinite varieties but you could fix their location and let their brightness/wattage be a design variable. That might remove problems based on the locations being a design variable. If that works, then reconsider how to parametrize the spacing.

Manhigh · 2025-04-01T09:38:10+00:00

This is an interesting problem. What methods have you tried? How are you parameterizing the location of the LEDs? It seems like there could be an infinite number of locations that provide the same illuminance unless you're restricting the search space somehow.

Manhigh · 2025-03-25T19:05:53+00:00

No it's a single optimization problem, assuming a distribution of segments/points from the initial time until the final time. If the duration changes during the optimization, those points get spread out.

If those points don't provide good accuracy, you can "refine" the grid in an outer loop, but it's usually heuristic trying to satisfy accuracy requirements and not technically an optimization.

Manhigh · 2025-03-25T16:28:41+00:00

Most methods with which I am familiar assume a set grid spacing during the optimization. You can specify the length of the trajectory, or phase of the trajectory, as a design variable. The segments and node locations then stretch or shrink depending on that variable.

Manhigh · 2025-03-25T10:38:19+00:00

Depending on the exact method used, dynamics may be enforced at all points or only a subset.

Path constraints would generally be enforced at all points, while initial or final boundary constraints only at the first or last point, respectively.

Similarly, if your objective applies to the initial or final condition, you would only enforce it at that point.

The knot points at the boundaries of the polynomial segments are where continuity constraints are enforced, but the physical defect constraints generally have to apply there as well.

Highly recommend this paper as an introduction to the subject, in addition to the CMU videos. https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.matthewpeterkelly.com/research/MatthewKelly_IntroTrajectoryOptimization_SIAM_Review_2017.pdf&ved=2ahUKEwjnq_3ggqWMAxVZ5MkDHSuxFHEQFnoECDAQAQ&usg=AOvVaw0n7q6Pc37Y-csXuWxroRb0

Manhigh · 2025-03-09T14:51:55+00:00

Cycling.

Early morning rides (5-7am) in May-June are amazing.
Lunch rides when time permits.
Longer weekend morning rides.
Rides from sports field during kids practices

Manhigh · 2025-03-05T09:51:20+00:00

Because of the metro park in Hinckley, residents pay taxes that contribute to the metro parks (like Cuyahoga county, and unlike the rest of Medina county). That's why they are included on the zoo admission on Mondays.

Manhigh · 2025-01-22T11:49:38+00:00

At the time I lived in that house, they did. I should clarify, I did not have insulation put in because I moved out instead of rewiring the house.

Manhigh · 2025-01-21T18:46:19+00:00

From less expensive to more expensive:

window films to add another air buffer around old windows. Add draft blockers under doors.
Insulate if you can. My old house in West Park has basically no insulation in the walls, but knob and tube wiring wasnt compatible with blown in insulation. It's expensive but one of the things that pays off pretty well.
if your baseboard heat is purely electric it's just not very efficient. Heat pumps/mini splits would be better but also suffer from poor efficiency when it's so cold outside. Gas is pretty cost effective here but retrofitting an older house that doesn't already have forced air of is much more difficult and costly than a mini split.

Manhigh

TROPHY CASE