Results 41 to 50 of about 307,060 (286)

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

PD-Based Optimal ADRC with Improved Linear Extended State Observer

Entropy, 2021
Taking dead-zone nonlinearlity and external disturbances into account, an active disturbance rejection optimal controller based on a proportional-derivative (PD) control law is proposed by connecting the proportional-integral-derivative (PID) control ...
Zhen Zhang, Jian Cheng, Yinan Guo
doaj   +1 more source

A passivity approach to controller-observer design for robots [PDF]

, 1992
Passivity-based control methods for robots, which achieve the control objective by reshaping the robot system's natural energy via state feedback, have, from a practical point of view, some very attractive properties.
Berghuis, Harry, Berghuis, Harry, Nijmeijer, Henk   +2 more
core   +4 more sources

Stabilization of Linear Time-Invariant Systems by State-Derivative Feedback

WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL, 2023
In this paper is studied the stabilization problem by state-derivative feedback for linear time-invariant continuous-time systems. In particular, explicit necessary and sufficient conditions are established for the stability of a closed-loop system, obtained by state-derivative feedback from the given linear time-invariant continuous-time system ...
openaire   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

Quadrotor UAV Altitude Control Using FOPID, PID and Integral State Feedback Controller

Proceedings
This research presents the development of an altitude control for a quadrotor unmanned aerial vehicle (UAV) using a fractional-order proportional-integral-derivative (FOPID) controller, a proportional-integral-derivative (PID) controller, and an integral
Abubakar Umar, Muhammed Bashir Mu’azu, Yusuf Sha’aban Abubakar, Zaharuddeen Haruna, Ime Jarlath Umoh, Shamsuddeen Yusuf   +5 more
doaj   +1 more source

Nonlinear analysis and control of a reaction wheel pendulum: Lyapunov-based approach

Engineering Science and Technology, an International Journal, 2020
This paper presents a nonlinear analysis, control, and comparison of controllers based on the dynamical model of the reaction wheel pendulum (RWP) in a tutorial style.
Oscar Danilo Montoya, Walter Gil-González   +1 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Capacity of a POST Channel with and without Feedback

, 2013
We consider finite state channels where the state of the channel is its previous output. We refer to these as POST (Previous Output is the STate) channels. We first focus on POST($\alpha$) channels.
Asnani, Himanshu, Permuter, Haim H., Weissman, Tsachy   +2 more
core   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source