Results 51 to 60 of about 303,776 (293)
Asymptotic behavior of a stationary silo with absorbing walls [PDF]
J. Statist. Phys. 106 (2002), no. 3-4, 521--546, 2001 We study the nearest neighbors one dimensional uniform q-model of force fluctuations in bead packs [Coppersmith et al (1996)], a stochastic model to simulate the stress of granular media in two dimensional silos. The vertical coordinate plays the role of time, and the horizontal coordinate the role of space.
arxiv +1 more source
Simulated Microgravity Using a Rotary Culture System Compromises the In Vitro Development of Mouse Preantral Follicles. [PDF]
PLoS ONE, 2016 Growing cells in simulated weightlessness condition might be a highly promising new technique to maintain or generate tissue constructs in a scaffold-free manner.
Shen Zhang +7 more
doaj +1 more source
Creep Characterization of Inconel 718 Lattice Metamaterials Manufactured by Laser Powder Bed Fusion
Advanced Engineering Materials, EarlyView., 2023 Herein, the creep characteristics of additively manufactured Inconel 718 metamaterials are investigated. The creep behavior of metamaterials and the effects of microstructural defects are assessed, and the microstructure defects are accurately captured using Kachanov's creep damage model.
Akash Singh Bhuwal +5 more
wiley +1 more source
Modeling the Impact of Microgravity at the Cellular Level: Implications for Human Disease
Frontiers in Cell and Developmental Biology, 2020 A lack of gravity experienced during space flight has been shown to have profound effects on human physiology including muscle atrophy, reductions in bone density and immune function, and endocrine disorders.
Peta Bradbury +7 more
doaj +1 more source
Advanced Engineering Materials, EarlyView., 2023 This study aims to explore the feasibility of using a structure inspired by the features of horsetail and human spine as the potential helmet liner, targeting at mitigation of acceleration‐induced injuries. A parametric study is conducted to investigate the effect of individual geometrical variables in the design, indicating its capability to reduce ...
Bing Leng +3 more
wiley +1 more source
Homoclinic, Subharmonic and Superharmonic Bifurcations for a Pendulum with Periodically Varying Length [PDF]
, 2012 Dynamic behavior of a weightless rod with a point mass sliding along the rod axis according to periodic law is studied. This is the simplest model of child's swing. Melnikov's analysis is carried out to find bifurcations of homoclinic, subharmonic oscillatory, and subharmonic rotational orbits.
arxiv +1 more source
Lipid Signalling in Human Immune Response and Bone Remodelling under Microgravity
Applied Sciences, 2020 Since the first Apollo mission in 1969, microgravity has been linked to many alterations of astronauts’ physiology, among which immunosuppression, altered inflammation and bone loss represent relevant examples.
Marina Fava +2 more
doaj +1 more source
Antioxidants, 2023 Weightlessness in space leads to bone loss, muscle atrophy, and impaired immune defense in astronauts. Mesenchymal stem cells (MSCs) play crucial roles in maintaining the homeostasis and function of the tissue.
Wenjun Lv +5 more
doaj +1 more source
Advanced Engineering Materials, EarlyView., 2023 A novel method for tracking structural changes in gels using widely accessible microcomputed tomography is presented and validated for various hydro‐, alco‐, and aerogels. The core idea of the method is to track positions of micrometer‐sized tracer particles entrapped in the gel and relate them to the density of the gel network.
Anja Hajnal +3 more
wiley +1 more source
Memory via Temporal Delays in weightless Spiking Neural Network [PDF]
arXiv, 2022 A common view in the neuroscience community is that memory is encoded in the connection strength between neurons. This perception led artificial neural network models to focus on connection weights as the key variables to modulate learning. In this paper, we present a prototype for weightless spiking neural networks that can perform a simple ...
arxiv