Results 31 to 40 of about 3,578,319 (247)

An Incremental Feedback Control for Uncertain Mechanical System

IEEE Access, 2020
This paper focuses on the tracking problem for fully-actuated mechanical systems with uncertain parameters and external disturbances. Based on the state feedback control of contraction analysis, the robust controller with extra gains is suggested to ...
Guo Zhang, Ping He, Heng Li, Huan Liu, Xing-Zhong Xiong, Zhouchao Wei, Wei Wei, Yangmin Li   +7 more
doaj   +1 more source

Mechanisms of Feedback Regulation of Vitamin A Metabolism

Nutrients, 2022
Vitamin A is an essential nutrient required throughout life. Through its various metabolites, vitamin A sustains fetal development, immunity, vision, and the maintenance, regulation, and repair of adult tissues. Abnormal tissue levels of the vitamin A metabolite, retinoic acid, can result in detrimental effects which can include congenital defects ...
Catherine O’Connor, Parisa Varshosaz, Alexander R. Moise   +2 more
openaire   +2 more sources

Stable hopping of a muscle-actuated leg system using positive force feedback [PDF]

, 2007
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.Includes bibliographical references (leaves 89-92).In control of movement, two key components, which are pure mechanical response of the system and response due ...
Wongviriyawong, Chanikarn Mint
core  

Feedback-cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK

, 2023
Tapered optical fibers (TOFs) are used in many areas of physics and optical technologies ranging from coupling light into nanophotonic components to optical sensing and amplification to interfacing quantum emitters.
Adarsh Shankar Prasad (14488412), Arno Rauschenbeutel (14391282), Jürgen Volz (14406828), Jihao Jia (14488406), Sebastian Pucher (14404677), Michael Antesberger (14488409), Philipp Schneeweiß (14488415), Felix Tebbenjohanns (11703593)   +7 more
core   +1 more source

“We Cannot Talk as a Family”: Complexities of Survivorship Communication Among Hispanic/Latino Young Adult Survivors of Childhood Cancer, Parents, and Clinicians

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Young adult childhood cancer survivors (YA‐CCS) have an increased risk of treatment‐related health complications throughout their lives. Lifelong survivorship care is recommended, yet many YA‐CCS experience disruptions in care during pediatric‐to‐adult transitions and do not receive recommended survivorship care.
Kevin Shanchen Pu, Nicole Fernández‐Viña, Briana C. Martin‐Villa, Daniela Ramirez, Rebecca M. Lewinsohn, Mary Smith, Heidi Boynton, Lidia Schapira, Stephanie M. Smith   +8 more
wiley   +1 more source

Choosing versus receiving feedback: The impact of feedback valence on learning in an assessment game [PDF]

, 2016
Studies examining feedback in educational settings have largely focused on feedback that is received, rather than chosen, by students. This study investigates whether adult participants learn more from choosing rather than receiving feedback from virtual
Cutumisu, M., Schwartz, D. L.
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Erratum: Dissecting the turbulent weather driven by mechanical AGN feedback [PDF]

, 2021
This is an Erratum to the paper entitled ‘Dissecting the turbulent weather driven by mechanical AGN feedback’, which is published in MNRAS, 498(4), 4983–5002 (2020)
Wittor, D., GASPARI, MASSIMO, Wittor D., Gaspari M., D Wittor, M Gaspari   +5 more
core   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

Control theory for scanning probe microscopy revisited

Beilstein Journal of Nanotechnology, 2014
We derive a theoretical model for studying SPM feedback in the context of control theory. Previous models presented in the literature that apply standard models for proportional-integral-derivative controllers predict a highly unstable feedback ...
Julian Stirling
doaj   +1 more source