Results 1 to 10 of about 3,400 (25)

A jamming plane of sphere packings [PDF]

PNAS April 6, 2021 118 (14) e2021794118, 2020
The concept of jamming has attracted great research interest due to its broad relevance in soft matter such as liquids, glasses, colloids, foams, and granular materials, and its deep connection to the sphere packing problem and optimization problems. Here we show that the domain of amorphous jammed states of frictionless spheres can be significantly ...
arxiv   +1 more source

Criticality and marginal stability of the shear jamming transition of frictionless soft spheres [PDF]

, 2022
We study numerically the critical behavior and marginal stability of the shear jamming transition for frictionless soft spheres, observed to occur over a finite range of densities, associated with isotropic jamming for densities above the minimum jamming (J-point) density.
arxiv   +1 more source

A review on shear jamming [PDF]

Physics Reports, Volume 1038, 2 November 2023, Pages 1-18, 2023
Jamming is a ubiquitous phenomenon that appears in many soft matter systems, including granular materials, foams, colloidal suspensions, emulsions, polymers, and cells -- when jamming occurs, the system undergoes a transition from flow-like to solid-like states.
arxiv   +1 more source

Two Decades of Game Jams [PDF]

ICGJ 2021: Sixth Annual International Conference on Game Jams, Hackathons, and Game Creation Events, 2021
In less than a year's time, March 2022 will mark the twentieth anniversary of the first documented game jam, the Indie Game Jam, which took place in Oakland, California in 2002. Initially, game jams were widely seen as frivolous activities. Since then, they have taken the world by storm.
arxiv   +1 more source

Embedding Jamming Attacks into Physical Layer Models in Optical Networks [PDF]

, 2020
Optical networks are prone to physical layer attacks, in particular the insertion of high jamming power. In this paper, we present a study of jamming attacks in elastic optical networks (EON) by embedding the jamming into the physical layer model, and we analyze its impact on the blocking probability and slots utilization.
arxiv   +1 more source

Recurrent Neural Network-based Anti-jamming Framework for Defense Against Multiple Jamming Policies [PDF]

arXiv, 2022
Conventional anti-jamming methods mainly focus on preventing single jammer attacks with an invariant jamming policy or jamming attacks from multiple jammers with similar jamming policies. These anti-jamming methods are ineffective against a single jammer following several different jamming policies or multiple jammers with distinct policies. Therefore,
arxiv  

Jamming Attacks and Anti-Jamming Strategies in Wireless Networks: A Comprehensive Survey [PDF]

arXiv, 2021
Wireless networks are a key component of the telecommunications infrastructure in our society, and wireless services become increasingly important as the applications of wireless devices have penetrated every aspect of our lives. Although wireless technologies have significantly advanced in the past decades, most wireless networks are still vulnerable ...
arxiv  

Cross-layer based intermittent jamming schemes for securing energy-constraint networks [PDF]

arXiv, 2021
The Internet-of-Things (IoT) emerges as a paradigm to achieve ubiquitous connectivity via wireless communications between kinds of physical objects. Due to the wireless broadcasting nature and the energy constraint of physical objects, concerns on IoT security have triggered research on cooperative jamming based physical layer security.
arxiv  

Critical behavior of a traffic flow model [PDF]

Physical Review E 59, 2672 (1999), 1998
The Nagel-Schreckenberg traffic flow model shows a transition from a free flow regime to a jammed regime for increasing car density. The measurement of the dynamical structure factor offers the chance to observe the evolution of jams without the necessity to define a car to be jammed or not.
arxiv   +1 more source

Band & Tone Jamming Analysis and Detection on LoRa signals [PDF]

arXiv, 2021
This paper examines the effect of Band Jamming (BJ) and Tone Jamming (TJ) on LoRa signals in a flat Additive White Gaussian Noise (AWGN) channel. In this scenario, LoRa proves to have good resiliency against these jamming attacks. Furthermore, a simple and lightweight BJ and TJ jammer detection scheme is derived. Theoretical and simulation results show
arxiv