Results 41 to 50 of about 307,462 (307)

Motion Accuracy and Dynamic Responses of Dual-Manipulator on Spacecraft Considering Clearance Joints

Aerospace
Clearance in joints caused by assemblage, manufacturing errors, and wear is inevitable, which will affect the dynamic performance of the dual-manipulator system on spacecraft.
Yiling Kuang, Zhengfeng Bai, Cheng Wei
doaj   +1 more source

Dynamic analysis of a parallel robot with spherical joints with consideration for joint clearance

Nihon Kikai Gakkai ronbunshu, 2022
This paper proposes a dynamic analysis method for evaluating the vibrational behavior of a parallel robot having spherical joints with clearance. By using variables that represent the relative displacement between the elements of clearance joints as ...
Masumi OHNO, Yukio TAKEDA
doaj   +1 more source

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

POLYCENTRIC EXOPROSTHETIC KNEE JOINTS – EXTENT OF SHORTENING DURING SWING PHASE

Canadian Prosthetics & Orthotics Journal, 2020
BACKGROUND: An often assumed advantage of polycentric knee joints compared to monocentric ones is the improved ground clearance during swing phase due to the geometric shortening of the lower leg segment (LLS).
Thomas Maximilian Köhler, Malte Bellmann, Siegmar Blumentritt   +2 more
doaj   +1 more source

Spatial revolute joints with clearance and friction for dynamic analysis of multibody mechanical systems [PDF]

, 2016
A study on the effects of dry spatial revolute joints with clearance and friction is delivered through this work. Both radial and axial clearances are taken into consideration which makes the model more realistic for three-dimensional motion.
Flores, Paulo, Hajžman, Michal, Isaac, Fernando, Marques, Pedro Filipe Lima, Polach, Pavel, Rychecký, Drahomír   +5 more
core  

Influence of clearance on the time-dependent performance of the hip following hemiarthroplasty: a finite element study with biphasic acetabular cartilage properties [PDF]

, 2014
Hip hemiarthroplasty is a common treatment for femoral neck fracture. However, the acetabular cartilage may degenerate after hemiarthroplasty leading to postoperative failure and the need for revision surgery.
Afoke, Anderson, Anderson, Ateshian, Ateshian, Athanasiou, Bergmann, Brown, Dalstra, Devas, Finlay, Forster, Forster, Gu, Hodge, Jin, John Fisher, Julkunen, Junyan Li, Kosashvili, Krishnan, Li, Li, Li, Li, Lizhang, Maas, Mavčič, Mow, Mow, Park, Pawaskar, Pawaskar, Ruth K. Wilcox, Soltz, Søreide, van der Meulen, Xijin Hua, Yoshida, Zhongmin Jin   +39 more
core   +3 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Posture and Dynamics Analysis of Hydraulic Support with Joint Clearance under Impact Load

Machines, 2023
A hydraulic support is one of the key pieces of equipment in a fully mechanized coal-mining face. The shaft is seriously worn due to repeated support shifting in coal-mining operations, and the hydraulic support bears a large amount of impact load in the
Qingliang Zeng, Penghui Xu, Zhaosheng Meng, Chen Ma, Xiaowan Lei   +4 more
doaj   +1 more source

Ultrasonic scanning system for in-place inspection of brazed tube joints [PDF]

, 1973
A miniaturized ultrasonic scanning system for nondestructive in-place, non-immersion testing of brazed joints in stainless-steel tubing is described. The system is capable of scanning brazed tube joints, with limited clearance access, in 1/4 through 5/8 ...
Haralson, H. S., Haynes, J. L., Wages, C. G.   +2 more
core   +1 more source

Tumor and germline testing with next generation sequencing in epithelial ovarian cancer: a prospective paired comparison using an 18‐gene panel

Molecular Oncology, EarlyView.
Genetic testing in epithelial ovarian cancer includes both germline and tumor‐testing. This approach often duplicates resources. The current prospective study assessed the feasibility of tumor‐first multigene testing by comparing tumor tissue with germline testing of peripheral blood using an 18‐gene NGS panel in 106 patients.
Elisabeth Spenard, Cristina Mitric, Melanie Care, Tracy L. Stockley, Raymond H. Kim, Jeanna McCuaig, Blaise Clarke, Laura Ranich, Clare Sheen, Sarah E. Ferguson, Liat Hogen, Taymaa May, Marcus Q. Bernardini   +12 more
wiley   +1 more source