Work

I am an engi­neer at Upp­sa­la Uni­ver­si­ty in Swe­den. My rese­arch inte­rests inclu­de

  • wire­less com­mu­ni­ca­ti­on in con­trol engi­nee­ring,
  • ener­gy har­ve­s­ting and wire­less ener­gy trans­fer in con­trol engi­nee­ring app­li­ca­ti­ons,
  • sca­la­bi­li­ty of dyna­mi­cal sys­tems,
  • con­trol engi­nee­ring and its app­li­ca­ti­ons,
  • sta­bi­li­ty and ana­ly­sis of two-dimen­sio­nal sys­tems and
  • port-Hamil­to­ni­an sys­tems.

See also my CV (July 2019).

Journal Publications

  1. D. Varagno­lo, S. Knorn, K. Staf­fas, E. Fjäll­ström and T. Wrig­stad, „Graph-theo­re­tic approa­ches and tools for quan­ti­ta­tively asses­sing cur­ri­cu­la cohe­rence“, accep­ted for publi­ca­ti­on at European Jour­nal of Engi­nee­ring Edu­ca­ti­on, 2020. varagnolo2020
  2. S. Bis­was, S. Dey, S. Knorn and A. Ahlén, „On Opti­mal Quan­ti­zed Non-Baye­si­an Qui­ckest Chan­ge Detec­tion with Ener­gy Har­ve­s­ting“, accep­ted for publi­ca­ti­on at IEEE Tran­sac­tions on Green Com­mu­ni­ca­ti­ons and Net­wor­king, 2020. biswas2020
  3. A. Ahlén, J. Åker­berg, M. Eriks­son, A. J. Isaks­son, T. Iwa­ki, K. H. Johans­son, S. Knorn, T. Lindh and H. Sand­berg, „Towards Wire­less Con­trol in Indus­tri­al Pro­cess Auto­ma­ti­on“, IEEE Con­trol Sys­tems Maga­zi­ne, Octo­ber 2019. ahlen2020
  4. S. Knorn, S. Dey, A. Ahlén and D.E. Que­ve­do, „Opti­mal Ener­gy Allo­ca­ti­on in Mul­ti Sen­sor Esti­ma­ti­on over Wire­less Chan­nels using Ener­gy Har­ve­s­ting and Sharing“, IEEE Tran­sac­tions on Auto­ma­tic Con­trol, vol. 64, no. 10, pages 4337–4344, Octo­ber 2019. knorn2019c
  5. R. Sei­ful­la­ev, S. Knorn and A. Ahlén, „The effect of uni­form quan­tiza­ti­on on para­me­ter esti­ma­ti­on of com­po­und dis­tri­bu­ti­ons“, IEEE Con­trol Sys­tems Let­ters (L‑CSS), vol. 3, no. 4, pages 1032–1037, Octo­ber 2019. seifullaev2019
  6. S. Knorn and A. Tei­xei­ra, „Effec­ts of Jamming Attacks on a Con­trol Sys­tem with Ener­gy Har­ve­s­ting“, IEEE Con­trol Sys­tems Let­ters, vol. 3, no. 4, pages 829–834, Octo­ber 2019. knorn2019b
  7. S. Knorn, D. Varagno­lo, R. Mel­les and M. Dewit­te, „Data-dri­ven models of pel­vic floor mus­cles dyna­mics sub­ject to psy­cho­lo­gi­cal and phy­sio­lo­gi­cal sti­mu­li“, IFAC Jour­nal of Sys­tems and Con­trol, vol. 8, June 2019. knorn2019a
  8. B. Bes­se­link and S. Knorn, „Scala­b­le input-to-sta­te sta­bi­li­ty for per­for­mance ana­ly­sis of lar­ge-sca­le net­works“, IEEE Con­trol Sys­tems Let­ters, vol. 2, no. 3, pages 507–512, July 2018. besselink2018
  9. D. Varagno­lo, S. Knorn, E. Oli­ver-Chi­va, R. Mel­les and M. Dewit­te, „Data-dri­ven model­ling of sub­jec­tive pain/pleasure assess­ments as respon­ses to vagi­nal dila­ti­on sti­mu­li“, IEEE Con­trol Sys­tems Let­ters, vol. 2, no. 3, pages 423–428, July 2018. varagnolo2018
  10. I. Her­man, S. Knorn and A. Ahlén, „Dis­tur­ban­ce sca­ling in bidi­rec­tio­n­al vehi­cle pla­toons with dif­fe­rent asym­me­try in posi­ti­on and velo­ci­ty cou­pling“, Auto­ma­ti­ca, vol. 82, pages 13–20, August 2017. herman2017
  11. S. Knorn, D. Varagno­lo, R. Mel­les and M. Dewit­te, „Mathe­ma­ti­cal model­ling of pres­su­re ver­sus pain rela­ti­ons in women suf­fe­ring from dys­pa­re­u­nia“, Jour­nal of Sexu­al Medi­ci­ne, vol. 14, no. 5, sup. 4, page e335, May 2017. knorn2017was
  12. S. Knorn and S. Dey, „Opti­mal ener­gy allo­ca­ti­on for line­ar con­trol with packet loss under ener­gy har­ve­s­ting cons­traints“, Auto­ma­ti­ca, vol. 77, pages 259–267, March 2017. knorn2017a
  13. S. Knorn, Z. Chen and R.H. Midd­le­ton, „Over­view: Collec­tive Con­trol of Mul­ti-agent Sys­tems“, accep­ted for publi­ca­ti­on in  IEEE Tran­sac­tions on Con­trol of Net­work Sys­tems, vol. 3, no. 4, pages 334–347, Decem­ber 2016. knorn2016b
  14. S. Knorn and R.H. Midd­le­ton, “Asym­pto­tic and Expo­nen­ti­al Sta­bi­li­ty of Non­line­ar Two-Dimen­sio­nal Con­ti­nuous-Dis­cre­te Roes­ser Models”, Sys­tems and Con­trol Let­ters, vol. 93, pages 35–42, July 2016.  knorn2016c
  15. S. Knorn and A. Ahlén, “Devia­ti­on Bounds in Mul­ti Agent Sys­tems Descri­bed by Undi­rec­ted Graphs”, Auto­ma­ti­ca, vol. 67, pages 205–210, May 2016. knorn2016a
  16. S. Knorn, A. Don­aire, J.C. Agüero and R.H. Midd­le­ton, “Sca­la­bi­li­ty of Bidi­rec­tio­n­al Vehi­cle Strings with Sta­tic and Dyna­mic Mea­su­rement Errors”, Auto­ma­ti­ca, vol. 62, pages 208–212, Decem­ber 2015. knorn2015b
  17. S. Knorn, S. Dey, A. Ahlén and D.E. Que­ve­do, „Dis­tor­ti­on Mini­mi­za­ti­on in Mul­ti-Sen­sor Esti­ma­ti­on Using Ener­gy Har­ve­s­ting and Ener­gy Sharing“, IEEE Tran­sac­tions on Signal Pro­ces­sing, vol. 63, no. 11, pages 2848–2863, June 2015. knorn2015a
  18. S. Knorn, A. Don­aire, J.C. Agüero and R.H. Midd­le­ton, “Pas­si­vi­ty-based con­trol for mul­ti-vehi­cle sys­tems sub­ject to string cons­traints”, Auto­ma­ti­ca, vol. 50, no. 12, pages 3224–3230, Decem­ber 2014. knorn2014
  19. S. Knorn and R.H. Midd­le­ton, “Sta­bi­li­ty of Two-Dimen­sio­nal Line­ar Sys­tems with Sin­gu­la­ri­ties on the Sta­bi­li­ty Bounda­ry using LMIs”, IEEE Tran­sac­tions on Auto­ma­tic Con­trol, vol. 58, no. 10, pages 2579–2590, Octo­ber 2013. knorn2013
  20. R. Shor­ten, M. Cor­less, K. Wulff, S. Klin­ge, and R.H. Midd­le­ton, “Qua­dra­tic Sta­bi­li­ty and Sin­gu­lar SISO Swit­ching Sys­tems”, IEEE Tran­sac­tions on Auto­ma­tic Con­trol, vol. 54, no. 11, pages 2714–2718, Novem­ber 2009. shorten2009

Book Chapters

  1. S. Knorn and D.E. Que­ve­do, „Opti­mal ener­gy allo­ca­ti­on in ener­gy har­ve­s­ting and sharing wire­less sen­sor net­works“, in „Ener­gy Har­ve­s­ting for Wire­less Sen­sor Net­works: Tech­no­lo­gies, Com­pon­ents and Sys­tem Design“ de Gru­y­ter, 2018.

Conference Publications

  1. S. Knorn, D. Varagno­lo, R. Jack­son, D. Bud­gett, J. Kru­ger and P. M. F. Niel­sen, „Online, data-dri­ven detec­tion of human posi­ti­on during Kegel exer­cis­ing“, IFAC World Con­gress, July 2020.
  2. S. Knorn and D. Varagno­lo, „Auto­ma­tic con­trol: the natu­ral approach for a quan­ti­ta­ti­ve-based per­so­na­li­zed edu­ca­ti­on“, IFAC World Con­gress, July 2020.
  3. E. Weng­le, S. Knorn and D. Varagno­lo, „COn­CUR — COhe­rence in CUR­ri­cu­la: A tool to assess, ana­ly­ze and visua­li­ze cohe­rence in hig­her edu­ca­ti­on cur­ri­cu­la“, IFAC World Con­gress, July 2020.
  4. R. Sei­ful­la­ev, S. Knorn and A. Ahlén, „A com­pa­ra­ti­ve inves­ti­ga­ti­on of infor­ma­ti­on loss due to varia­ble quan­tiza­ti­on on para­me­ter esti­ma­ti­on of com­po­und dis­tri­bu­ti­on“, IFAC World Con­gress, July 2020.
  5. S. Knorn and B. Bes­se­link, „Scala­b­le robust­ness of inter­con­nec­ted sys­tems sub­ject to struc­tu­ral chan­ges“, IFAC World Con­gress, July 2020.
  6. S. Knorn, D. Varagno­lo, N. Kask, D. M. Bud­gett, J. Kru­ger and P. M. F. Niel­sen, „Ana­ly­sing the effec­ts of bio­feed­back using con­trol-ori­en­ted for­ma­lisms: the case of gami­fied Kegel exer­cis­ing“, European Con­trol Con­fe­rence (ECC), June 2020.
  7. N. Kask, D.M. Bud­gett, J. A. Kru­ger, P. M. F. Niel­sen, D. Varagno­lo and S. Knorn, „Data-dri­ven model­ling of fati­gue in pel­vic floor mus­cles when per­forming Kegel exer­ci­ses“, IEEE Con­fe­rence on Decisi­on and Con­trol (CDC), Decem­ber 2019. kask2019cdc
  8. R. Sei­ful­la­ev, S. Knorn and A. Ahlén, „The effect of uni­form quan­tiza­ti­on on para­me­ter esti­ma­ti­on of com­po­und dis­tri­bu­ti­ons“, IEEE Con­fe­rence on Decisi­on and Con­trol (CDC) (also IEEE Con­trol Sys­tems Let­ters), Decem­ber 2019.
  9. S. Knorn and A. Tei­xei­ra, „Effec­ts of Jamming Attacks on a Con­trol Sys­tem with Ener­gy Har­ve­s­ting“, IEEE Con­fe­rence on Decisi­on and Con­trol (CDC), Decem­ber 2019.
  10. S. Knorn and K. Staf­fas, „Adap­tati­on of tea­ching and assess­ment to stu­dents‘ ambi­ti­on levels“, 47th SEFI Annu­al Con­fe­rence, Sep­tem­ber 2019.
  11. S. Knorn, D. Varagno­lo, K. Staf­fas, T. Wrig­stad and E. Fjäll­ström, „Quan­ti­ta­ti­ve ana­ly­sis of cur­ri­cu­la cohe­rence using direc­ted graphs“, IFAC Advan­ces in Con­trol Edu­ca­ti­on Sym­po­si­um (ACE), July 2019.
  12. E. Fjäll­ström, C. Fors­berg, F. Truls­son, S. Knorn, K. Staf­fas, D. Varagno­lo and T. Wrig­stad, “Cour­ses-Con­cepts-Graphs as a Tool to Mea­su­re the Impor­t­an­ce of Con­cepts in Uni­ver­si­ty Pro­gram­mes”, European Con­trol Con­fe­rence (ECC), June 2019.
  13. B. Bes­se­link and S. Knorn, „Scala­b­le input-to-sta­te sta­bi­li­ty for per­for­mance ana­ly­sis of lar­ge-sca­le net­works“, 57th IEEE Con­fe­rence on Decisi­on and Con­trol (also IEEE Con­trol Sys­tems Let­ters), Decem­ber 2018.
  14. D. Varagno­lo, S. Knorn, E. Oli­ver-Chi­va, R. Mel­les and M. Dewit­te, „Data-dri­ven model­ling of sub­jec­tive pain/pleasure assess­ments as respon­ses to vagi­nal dila­ti­on sti­mu­li“, 57th IEEE Con­fe­rence on Decisi­on and Con­trol (also IEEE Con­trol Sys­tems Let­ters), Decem­ber 2018.
  15. S. Bis­was, S. Knorn, S. Dey and A. Ahlén, „Quan­ti­zed Non-Baye­si­an Qui­ckest Chan­ge Detec­tion with Ener­gy Har­ve­s­ting“, IEEE Globecom2018 SPC, Decem­ber 2018.
  16. E. Fjäll­ström, S. Knorn, K. Staf­fas and D. Varagno­lo, „Deve­lo­ping Con­cept Invento­ry Tests for Elec­tri­cal Engi­nee­ring (CITE): extrac­ta­ble infor­ma­ti­on, ear­ly results, and lear­ned les­sons“, 12th UKACC Inter­na­tio­nal Con­fe­rence on Con­trol, Sep­tem­ber 2018.
  17. S. Knorn, D. Varagno­lo, E. Oli­ver-Chi­va, R. Mel­les and M. Dewit­te, „Data-dri­ven model­ling of pel­vic floor mus­cles dyna­mics“, IFAC Sym­po­si­um on Bio­lo­gi­cal and Medi­cal Sys­tems (BMS), Sep­tem­ber 2018.
  18. D. Varagno­lo, S. Knorn, E. Oli­ver-Chi­va, R. Mel­les and M. Dewit­te, „Towards the indi­vi­dua­li­za­ti­on of vagi­nal dila­ta­ti­on exer­ci­ses: A Quan­ti­ta­ti­ve ana­ly­sis of the varia­bi­li­ty of vagi­nal pres­su­re respon­ses“, ISSM ESSM Annu­al Mee­ting, March 2018.
  19. J. Fer­gu­son, A. Don­aire, S. Knorn and R.H. Midd­le­ton, „Decen­tra­li­zed con­trol for l2 weak string sta­bi­li­ty of vehi­cle pla­toon“, IFAC World Con­gress, July 2017. ferguson2017ifac
  20. D. Varagno­lo, S. Knorn, R. Mel­les and M. Dewit­te, „Qua­li­ta­ti­ve mode­ling of pres­su­re vs. pain rela­ti­ons in women suf­fe­ring from dys­pa­re­u­nia“, IFAC World Con­gress, July 2017. varagnolo2017ifac
  21. S. Knorn and S. Dey, „Opti­mal Sen­sor Trans­mis­si­on Ener­gy Allo­ca­ti­on for Line­ar Con­trol Over a Packet Drop­ping Link with Ener­gy Har­ve­s­ting“, 54th IEEE Con­fe­rence on Decisi­on and Con­trol (CDC), Decem­ber 2015. knorn2015cdc
  22. S. Knorn and S. Dey, „Opti­mal Ener­gy Allo­ca­ti­on for Line­ar Con­trol over a Packet-Drop­ping Link with Ener­gy Har­ve­s­ting Cons­traints“, 5th IFAC Work­shop on Dis­tri­bu­t­ed Esti­ma­ti­on and Con­trol in Net­wor­ked Sys­tems (Nec­Sys), Sep­tem­ber 2015. knorn2015necsys
  23. S. Knorn, S. Dey, A. Ahlén and D.E. Que­ve­do, „Mul­ti-Sen­sor Esti­ma­ti­on Using Ener­gy Har­ve­s­ting and Ener­gy Sharing“, IEEE Inter­na­tio­nal Con­fe­rence on Com­mu­ni­ca­ti­ons (ICC), pages 4229–4234, June 2015. knorn2015icc
  24. S. Knorn and R.H. Midd­le­ton, „Lymph com­part­ment models and HIV intra pati­ent infec­tion dyna­mics“, IEEE Con­fe­rence on Con­trol App­li­ca­ti­ons, pages 1699–1704, Octo­ber 2014. knorn2014msc
  25. S. Knorn, A. Don­aire, J.C. Agüero and R.H. Midd­le­ton, “Sca­la­bi­li­ty of Bidi­rec­tio­n­al Vehi­cle Strings with Mea­su­rement Errors”, IFAC World Con­gress, pages 9171–9176, August 2014. knorn2014ifacwc
  26. S. Knorn and R.H. Midd­le­ton, “Two-Dimen­sio­nal Ana­ly­sis of String Sta­bi­li­ty of Non­line­ar Vehi­cle Strings”, 52nd IEEE Con­fe­rence on Decisi­on and Con­trol (CDC), pages 5864–5869, Decem­ber 2013. knorn2013cdc
  27. S. Knorn, A. Don­aire, J.C. Agüero and R.H. Midd­le­ton, “Ener­gy-based Con­trol of Bidi­rec­tio­n­al Vehi­cle Strings”, 3rd Aus­tra­li­an Con­trol Con­fe­rence (AUCC), pages 251–256, Novem­ber 2013. knorn2013aucc
  28. S. Knorn and R.H. Midd­le­ton, “String Sta­bi­li­ty Ana­ly­sis of a Vehi­cle Pla­toon with Com­mu­ni­ca­ti­on Ran­ge 2 Using the Two-Dimen­sio­nal Indu­ced Ope­ra­tor Norm”, European Con­trol Con­fe­rence (ECC), pages 3354–3359, July 2013. knorn2013ecc
  29. S. Knorn and R.H. Midd­le­ton, “Asym­pto­tic Sta­bi­li­ty of Two-Dimen­sio­nal Con­ti­nuous Roes­ser Models with Sin­gu­la­ri­ties at the Sta­bi­li­ty Bounda­ry”, 51st IEEE Con­fe­rence on Decisi­on and Con­trol (CDC), pages 7787–7792, Decem­ber 2012. knorn2012cdc
  30. S. Knorn and R.H. Midd­le­ton, “Two-Dimen­sio­nal Fre­quen­cy Domain Ana­ly­sis of String Sta­bi­li­ty”, 2nd Aus­tra­li­an Con­trol Con­fe­rence (AUCC), pages 301–306, Novem­ber 2012. knorn2012aucc
  31. S. Klin­ge and R.H. Midd­le­ton, “Time Head­way Requi­re­ments for String Sta­bi­li­ty of Homo­ge­ne­ous Line­ar Uni­di­rec­tio­n­al­ly Con­nec­ted Sys­tems”, Joint 48th IEEE Con­fe­rence on Decisi­on and Con­trol and 28th Chi­ne­se Con­trol Con­fe­rence (CDC), pages 1992–1997, Decem­ber 2009. knorn2009cdc
  32. S. Klin­ge and R.H. Midd­le­ton, “String Sta­bi­li­ty Ana­ly­sis of Homo­ge­ne­ous Line­ar Uni­di­rec­tio­n­al­ly Con­nec­ted Sys­tems with Non­ze­ro Initi­al Con­di­ti­ons”, IET Irish Signals and Sys­tems Con­fe­rence, June 2009. knorn2009issc
  33. R. Shor­ten, M. Cor­less, R.H. Midd­le­ton, S. Klin­ge, and K. Wulff, “A Qua­dra­tic Sta­bi­li­ty Result for Sin­gu­lar Swit­ched Sys­tems with App­li­ca­ti­on to Anti-Win­dup Con­trol”, Ame­ri­can Con­trol Con­fe­rence (ACC), pages 1917–1922, June 2009. shorten2009acc
  34. L. Gri­go­rov, K. Rudie, J.E.R. Cury and S. Klin­ge, “Tem­pla­te Design and Auto­ma­tic Genera­ti­on of Con­trol­lers for Indus­tri­al Robots”, ACM Sym­po­si­um on App­lied Com­pu­ting, March 2008. grigorov2008acmsac