Tim van der Zee

PhD-candidate at University of Calgary in the Biomedical Engineering Program

[Brenda van Keeken @bvkeeken]

Tangentieel trappen de beste fietstechniek? Nee, concludeert bewegingswetenschapper Dinant Kistemaker “De beste plek om te trappen ligt rond de bal van de voet” @DinantKistemak1 @VU_FBW @VU_FGB @VUamsterdam @VvBN_nieuws https://t.co/0jLTN70r8w via @parool

[Tim van der Zee @Tim_vd_Zee]

@neuromecHAHNics @JosefinaManieu @MVFranchi @PaternosterFlo @Geoff_A_Power @WolfgangSeiberl @kiisanishikawa @BrentRaiteri @NeilJCronin84 @OlivierSeynnes Hi Josefina, I believe @NHaelewijn tried to use TimTrack on panoramic images at some point. Although TimTrack isn't developed for panoramic images, it worked reasonably well. Might need some adaptations though.

https://t.co/hTo5U1Id8T

[Tim van der Zee @Tim_vd_Zee]

@wscottselbie @cmotioninc That's cool! I wasn't aware of the tutorial yet. @wscottselbie thanks for sharing :)

[Tim van der Zee @Tim_vd_Zee]

Thanks @cmotioninc for creating such a cool tutorial using our #Visual3D dataset 🙏

The tutorial explains how #Inspect3D may be used to clean and visualize the raw data files:
https://t.co/xbeMvOhkh9

[Scott Selbie @wscottselbie]

I was especially pleased to see that the data were stored in #c3d files and #Visual3D #cmo files.
To facilitate the exploration of this dataset, @cmotioninc has created a tutorial using #Visual3D and #Inspect3D for modeling and cleaning the data.
https://t.co/Y62WaAa1eI

[Tim van der Zee @Tim_vd_Zee]

Data: https://t.co/D9mAN4umJ9

Code: https://t.co/w84QogitHS

[Tim van der Zee @Tim_vd_Zee]

Curious how biomechanics of human walking changes with increasing step lengths, widths, frequencies and speeds?

Our data descriptor paper was published today in Nature Scientific Data (see: https://t.co/7Yfy5XcgzA). Apart from data, we also provide code for analysis on GitHub.

[Tim van der Zee @Tim_vd_Zee]

@neuromecHAHNics @Owen1Beck @WannesSwinnen @LTrej0314 @JordynSchroede4 @FranzBiomech @gregory_sawicki @japplphysiol Might be interesting to compare (ascending limb) short length conditions to force-matched and F/F0-matched (descending limb) long length conditions in humans. I guess this hasn’t been done yet?

[Art Kuo @KuoArt]

How to walk on this terrain? Optimally ofc!

Obviously, look ahead for footholds. Otherwise practically no data—most biomechanical studies only do steady level walking.

"Humans plan for the near future to walk economically on uneven terrain" Submitted ms by O. Darici & me 🧵 1/

[Tim van der Zee @Tim_vd_Zee]

@AelesJ @neuromecHAHNics @WannesSwinnen @Owen1Beck @LTrej0314 @JordynSchroede4 @FranzBiomech @gregory_sawicki @japplphysiol @AelesJ that’s an interesting take, can you explain why you expect slower velocities at shorter length? I would expect faster velocities because series elastic length change is typically greater…

[Art Kuo @KuoArt]

Some say slow walking = high CoT, but that doesn't make sense. Usually wanna get somewhere, don't care about "per distance." We say slow walking = waste of time, which we DO care about. min COT not so useful.
https://t.co/xIHecFmdL6 (submitted ms) End/

[Art Kuo @KuoArt]

Tooting our own horn, T van der Zee from my lab showed model with Zahalak style cross bridges + Ca activation + recruitment. Hill-type models aren’t mechanistic, hopeless for dynamic transient conditions (ie life). 1/

[Tim van der Zee @Tim_vd_Zee]

@edwardswb Haha I’ll make sure to also add “Brent” to the list of approved names, I think @BrentRaiteri will also appreciate that 😜

[Tim van der Zee @Tim_vd_Zee]

Published today in PLOS ONE: TimTrack, a new (MATLAB-based) algorithm that estimates muscle fascicle length, pennation angle, and other features from ultrasound images without drift-sensitivity
https://t.co/hTo5U1HFjl

All code and example data are freely available on my GitHub

[Tim van der Zee @Tim_vd_Zee]

@TaylorJMDick @NKelp @JBiomech @FrancoisHug @KylieJ_Tucker @cclemente4 @UQMedicine That’s fascinating, considering that an isolated LG will likely increase in width during shortening. Thanks for the reply, and good luck with your research!

[Tim van der Zee @Tim_vd_Zee]

@NealeTillin @rosshm16 Thanks you so much! I really appreciate it, will definitely check it out

[Tim van der Zee @Tim_vd_Zee]

@NealeTillin @rosshm16 That sounds interesting, but the link doesn't work for me (I'm being redirected to ScienceDirect main page), could you perhaps provide another link? (e.g PubMed). That would be great, thanks!

[Tim van der Zee @Tim_vd_Zee]

@rosshm16 @jmthomas19 yes fewer # but also less force per crossbridge. @rosshm16 do you mean “why” in terms of evolution?

[Tim van der Zee @Tim_vd_Zee]

Our new paper on the role of soft tissue deformations in human walking is out: https://t.co/997oztoSdC

..suggesting that soft tissues dissipate substantial amounts of energy in a predictable manner

The paper is also featured in the "Inside JEB section": https://t.co/WUV7mwDKJw