Results 71 to 80 of about 789,262 (344)

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Математическая дробная модель Зимана для описания сердечных сокращений

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
В статье предлагается принципиально новое обобщение ранее известной математической модели Зимана сердечных сокращений за счет электрохимического воздействия.
Исрайилжанова, Г.C., Каримов, Ш.Т., Паровик, Р.И.   +2 more
doaj   +1 more source

Geometric phase effects for wavepacket revivals

, 1995
The study of wavepacket revivals is extended to the case of Hamiltonians which are made time-dependent through the adiabatic cycling of some parameters.
C. Jarzynski, G. Rempe, H. Goldstein, I. Sh. Averbukh, J. H. Hannay, J. Parker, J. Wals, L. Marmet, M. Kugler, M. Nauenberg, M. Nauenberg, M. V. Berry, M. V. Berry, O. Bohigas, V. I. Arnold   +14 more
core   +2 more sources

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Single-Leg Structural Design and Foot Trajectory Planning for a Novel Bioinspired Quadruped Robot

Complexity, 2021
To meet the stability requirements for moving quadruped robots, it is important to design a rational structure for a single leg and plan the trajectory of the foot.
Mingfang Chen, Qi Li, Sen Wang, Kaixiang Zhang, Hao Chen, Yongxia Zhang   +5 more
doaj   +1 more source

Исследование бифуркационных диаграмм дробной динамической системы Селькова для описания автоколебательных режимов микросейсм

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
В статье исследуется динамические режимы дробной системы Селькова с переменной наследственностью (памятью). Эффект переменной наследственности означает, что наследственность изменяется во времени, т.е. зависимость текущего состояния системы от предыдущих
Паровик, Р.И.
doaj   +1 more source

Geometric phase in open systems: beyond the Markov approximation and weak coupling limit

, 2006
Beyond the quantum Markov approximation and the weak coupling limit, we present a general theory to calculate the geometric phase for open systems with and without conserved energy.
A. Ekert, C. H. Oh, D. M. Tong, J. A. Jones, L. C. Kwek, L. C. Wang, X. X. Yi   +6 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

An extended massless phase and the Haldane phase in a spin-1 isotropic antiferromagnetic chain

, 1996
We study the phase transition of isotropic spin-1 models in the vicinity of the Uimin-Lai-Sutherland model by using the SU(3)_1 WZW model with certain marginal perturbations.
%U. Schollwöck, A. B. Zamolodchikov, A. B. Zamolodchikov, A. B. Zamolodchikov, A. M. Polyakov, A. M. Tsvelik, A. W. W. Ludwig, B. Sutherland, C. Itoi, C. J. Hamer, C. K. Lai, Chigak Itoi, F. Woynarovich, G. Fáth, G. Fáth, G. V. Uimin, H. J. de Vega, H. J. de Vega, H. Johannesson, H. Johannesson, H. M. Babujian, H. Tasaki, I. Affleck, I. Affleck, I. Affleck, I. Affleck, I. Affleck, I. Affleck, J. L. Cardy, J. L. Cardy, J. L. Cardy, K. A. Hallberg, K. Lee, K. Nomura, L. A. Takhtajan, L. Mezincescu, M. N. Barber, M. P. Nightingale, M. T. Batchelor, Masa-Hide Kato, N. Kawakami, N. Kawakami, P. P. Kulish, P. Schlottmann, S. Eggert, S. Eggert, S. Knabe, S. V. Pokrovskĭı, T. Giamarchi, T. Kennedy, T. Kennedy, T. Ziman   +51 more
core   +1 more source