Results 31 to 40 of about 9,226,030 (253)

On the problem of optimal control of rotation axis reorientation of a spacecraft

open access: yesВестник Самарского университета: Естественнонаучная серия
Various variants of the formulation of optimal control problem of the reorientation of the axis of dynamic symmetry of the spacecraft (spacecraft), which is the axis of rotation, are considered.
Yury N. Gorelov, Lubov V. Kurganskaya
doaj   +1 more source

An Algorithm for Online Inertia Identification and Load Torque Observation via Adaptive Kalman Observer-Recursive Least Squares

open access: yesEnergies, 2018
In this paper, an on-line parameter identification algorithm to iteratively compute the numerical values of inertia and load torque is proposed. Since inertia and load torque are strongly coupled variables due to the degenerate-rank problem, it is hard ...
Ming Yang   +4 more
doaj   +1 more source

Quantum Science and the Search for Axion Dark Matter

open access: yesPRX Quantum, 2023
The dark-matter puzzle is one of the most important open problems in modern physics. The ultralight axion is a well-motivated dark-matter candidate, conceived to resolve the strong-CP problem of quantum chromodynamics.
Alexander O. Sushkov
doaj   +1 more source

Social Functioning Within the First Years After Pediatric Brain Tumor Diagnosis and the Relationship With Family Psychosocial Risk

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Survivors of pediatric brain tumors (PBTs) can experience long‐term social difficulties, impacting quality of life. Beyond medical and environmental factors, family psychosocial risk may play a role in social outcomes by shaping the caregiving environment and may provide intervention options.
Renske H. Houben   +4 more
wiley   +1 more source

Some practical suggestions for the scientific problem formulation and the objectives in the research project

open access: yesMedisur, 2017
One of the main difficulties for first-time researchers is writing the scientific problem and the objective of the research. The objective of this article is to provide an orientation on how to carry out the concrete moment of formulating the problem and,
Luis Alberto Corona Martínez   +2 more
doaj   +2 more sources

On the Size of the Safety Area around the Launch Trajectory of a Rocket

open access: yesAerospace, 2023
The safety zone around the flight path of a rocket is determined by the fall of debris in the case of an accidental explosion or commanded termination. The trajectory of a tumbling body in a vertical plane is determined by specifying the velocity, flight
Luiz M. B. C. Campos, Manuel J. S. Silva
doaj   +1 more source

Association Between Individualized Education for Kidney Replacement Therapy Modality Selection and Peritoneal Dialysis Initiation: A Cross‐Sectional Study

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Peritoneal dialysis (PD) is an established home‐based kidney replacement therapy (KRT), but its uptake remains low in Japan. We evaluated whether individualized education in a dedicated outpatient clinic was associated with the initiation of PD.
Yasuko Ito   +7 more
wiley   +1 more source

Organoids in pediatric cancer research

open access: yesFEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Digital Services as a Stage of Ecosystem Development in Modern Russian Politics

open access: yesВестник Волгоградского государственного университета. Серия 4. История, регионоведение, международные отношения, 2023
Introduction. The article deals with issues related to the comprehensive phenomenon of modernity, the Internet. Attention is paid to new phenomena of its development, such as the emergence of digital services and platforms as well as the ...
Alexander Sokolov   +2 more
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

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