131 reputation
5
bio website inspirehep.net/…
location Duchy of Grand Fenwick
age 43
visits member for 3 years, 9 months
seen Jun 14 at 21:22

Experimental nuclear and particle physicist. These days I'm teaching, but I've spent a lot of time on nucleon structure in fixed target electron scattering and neutrino oscillations using reactors and beam sources.


Feb
2
comment Is running on treadmills easier than running outdoors because the ground is pulled beneath the runner?
@DaveLiepmann: If you're not pushing on the back swing and are pulling the leg on the forward swing the net momentum transfer to your trunk is toward the back. That part of the argument is absolutely clear from a physics perspective. Maybe there is a bio-mechanical difference, but it would have to be one concerning which muscles are actuating when and how hard, not one that affects the eff-dot-dee-ell "work" that we talk about in physics. That's why I suspect the surface.
Feb
2
awarded  Commentator
Feb
2
comment Is running on treadmills easier than running outdoors because the ground is pulled beneath the runner?
@Dave: If you tried to let the belt pull your foot you would begin moving backward in the frame of the gym, culminating on falling off the machine. On a real run letting the ground pull your foot backward slows you down. In a idealized PhysicsLand (tm) they are the same. When we did this topic on Physics.SE I guessed at wind resistance and the unevenness of the most outdoor surfaces as the source of the differences.
Feb
2
comment Is running on treadmills easier than running outdoors because the ground is pulled beneath the runner?
Also been looked at on Physics.SE: What's the difference between running up a hill and running up an inclined treadmill?, though I would treat the research in Dave Liepmann's answer as more definitive (or not as the case seems to be).
Sep
20
comment What can I do for cardio while I am on vacation with no equipment?
Note that Glacier is relatively high. How does it compare to the elevation where you live? If it is significantly higher you will find relatively light exercise to be more cardio-like than you are used to.
Jun
9
comment Non-prick glucose meter
DexCom and Minimed both offer user managed continuous glucose monitoring now: insert a single site the lasts several days to a week (on-label, and more off label). Alas, they (1) are still pretty expensive and (2) have a floating absolute calibration so they must be cross-checked with standard prick based tests several times a day at a minimum.
Apr
18
comment Recommend exercises to replace swimming
"Rarely will there be any sparring in a Tai Chi class" Indeed you generally have to hunt for a teacher who still does the martial form. Even then the "competitive" exercises start slow and very low impact.
Apr
2
answered What is a “Runners High”?
Mar
30
comment What's the difference between calories and kcal
Right. The physics calorie (little "c" = 4.187 Joules) is an inconveniently small unit for talking about fueling the human body.
Mar
14
awarded  Teacher
Mar
14
answered kickbox aerobics: want to make higher roundhouse kicks
Mar
12
awarded  Citizen Patrol
Mar
9
awarded  Autobiographer
Mar
9
awarded  Supporter