Results 121 to 130 of about 310,721 (284)

Iqcm Is Dispensable for Male Fertility in Mice

iNew Medicine, EarlyView.
Schematic overview of the experimental workflow. Iqcm is highly expressed in mice testis (left). Iqcm−/− mice were generated via CRISPR/Cas9 (second panel). Phenotypic analyses including testis/epididymis histology (H&E), sperm morphology, and litter size revealed no significant differences between Iqcm+/+ and Iqcm−/− mice (third panel).
Zhaojuan Yu, Yuhui Ye, Mingfei Xiang, Zhaolian Wei, Zhen Lu, Jia Peng, Yunxia Cao   +6 more
wiley   +1 more source

Rainfall‐Induced Physical Crusting Is Associated With Near‐Surface Structural Degradation and Strain Localization During Drying in Loess Soil

Land Degradation &Development, EarlyView.
ABSTRACT Rainfall‐induced physical crusting is associated with degradation of near‐surface soil structure, but its pore‐scale structural and mechanical evolution during drying remains poorly resolved. We combined time‐resolved X‐ray computed tomography (XCT), digital volume correlation (DVC), and surface‐aligned stratification to track pore ...
Ruikun Feng, Yiru Chen, Guanheng Liu, Qinqian Meng, Jian Wang   +4 more
wiley   +1 more source

Kinematic Modeling of a Novel (3+1)-Degree-of-Freedom Planar Parallel Manipulator Using Screw Theory

Algorithms
This work presents the kinematic analysis of a redundant planar parallel manipulator within the framework of screw theory. The main contribution of this work is the introduction and kinematic modeling of a novel redundant planar parallel manipulator ...
Jaime Gallardo-Alvarado, Alvaro Sanchez-Rodriguez, Horacio Orozco-Mendoza, Ramon Rodriguez-Castro, Luis A. Alcaraz-Caracheo   +4 more
doaj   +1 more source

Dissociable Handwriting Domains in Parkinson's Disease?

Movement Disorders Clinical Practice, EarlyView.
Abstract Background Handwriting abnormalities in Parkinson's disease (PD) extend beyond classical micrographia and may involve multiple graphomotor domains with distinct clinical and mechanistic correlates. Objectives To investigate whether distinct handwriting domains demonstrate dissociable relationships with differential diagnostic performance ...
Beyza Nur Cetin, Selcuk Comoglu, Aycan Cemil Ulker, Halil Onder   +3 more
wiley   +1 more source

Clinical Outcome Assessments in Movement Disorders: A Scoping Review of Current Rating Scales and Future Needs Beyond Parkinson's Disease

Movement Disorders Clinical Practice, EarlyView.
Abstract Background Clinical outcome assessments (COA) are essential for evaluating symptom severity, treatment response, and disease progression in movement disorders. As clinical knowledge evolves, it is necessary to ensure COAs continued relevance and validity.
Panagiota Tsitsi, Evita Papathoma, Nirosen Vijiaratnam, Camila Aquino, Stephen R. Duma, Norbert Kovacs, Kigocha Lameck Okeng'o, Aparna Wagle Shukla, Roongroj Bhidayasiri, Alberto J. Espay, Tiago A. Mestre, Alvaro Sanchez Ferro, Michelle H.S. Tosin, Matej Skorvanek, Ioanna Markaki   +14 more
wiley   +1 more source

Design and Multibody Dynamics Modeling of a Novel High‐Static‐Low‐Dynamic‐Stiffness Vibration Isolation Mechanism Based on Euler Buckling Characteristics

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Vibration isolation has long been a critical area of research, with the design of isolators based on the mechanical properties of Euler buckling beams representing one of the primary approaches. Traditionally, the focus has been on utilizing the negative stiffness characteristics of a post‐buckled Euler beam in parallel with positive stiffness
Yichang Feng, Yongpeng Gu, Gexue Ren, Suyuan Yu   +3 more
wiley   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Sliding Motions on Non‐Euclidean State Spaces: A Differential‐Geometric Perspective

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper extends sliding‐mode control theory to nonlinear systems evolving on smooth manifolds. Building on differential geometric methods, we reformulate Filippov's notion of solutions, characterize well‐defined vector fields on quotient spaces, and provide a consistent geometric definition of higher‐order sliding modes.
Fernando Castaños
wiley   +1 more source

Friction‐Aware Force‐Realizable Safety Control for Four‐Wheel Independently Steered and Driven Mobile Robots

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Safety‐critical control remains a major challenge for four‐wheel independently steered and driven (4ISD) mobile robots, where high‐accuracy path tracking and obstacle avoidance must be achieved under over‐actuated steering–driving coordination, tire–ground friction limits, and wheel‐torque constraints.
Ruitong Liu, Kenji Hashimoto
wiley   +1 more source

Impulsive Thruster Control for Spacecraft Docking: A Lyapunov Approach

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT In this work, we propose a novel discontinuous impulsive controller for nonlinear systems that admit continuous‐time stabilizing controllers. Specifically, we develop a technique for generating discrete control pulses of short duration based on the Lyapunov candidate function associated with a continuous‐time controller. Our method uses a real‐
Xun Liu, Hashem Ashrafiuon, Sergey G. Nersesov   +2 more
wiley   +1 more source