66 citations · 401 across the 18 of their papers we have counts for
19 papers
Beyond Static Cues: Unified Dynamic Detection of MLLM Backdoors via Dual-Flow Trajectory Analysis
Yinzhen Huang, Jiahe Xie, Yitong Sun +2
Multimodal Large Language Models (MLLMs) are increasingly deployed in safety-critical domains, yet their susceptibility to backdoor attacks remains a formidable challenge. While ex…
A three-dimensional morphoelastic model for self-oscillations in polyelectrolyte hydrogel filaments
Ariel Surya Boiardi, Roberto Marchello, Pietro Maria Santucci +2
We introduce a three-dimensional model for polyelectrolyte hydrogel filaments operating in a fluid environment under an electric field. The formulation builds on a morphoelastic fr…
Minimal actuation and control of a soft hydrogel swimmer from flutter instability
Ariel Surya Boiardi, Giovanni Noselli
Micro-organisms propel themselves in viscous environments by the periodic, nonreciprocal beating of slender appendages known as flagella. Active materials have been widely exploite…
Elastic bodies with kinematic constraints on many small regions
Andrea Braides, Giovanni Noselli, Simone Vincini
We study the equilibrium of hyperelastic solids subjected to kinematic constraints on many small regions, which we call perforations. Such constraints on the displacement are g…
Flutter instability in solids and structures, with a view on biomechanics and metamaterials
Davide Bigoni, Francesco Dal Corso, Oleg N. Kirillov +3
The phenomenon of oscillatory instability called \lq flutter' was observed in aeroelasticity and rotor dynamics about a century ago. Driven by a series of applications involving no…
Rods coiling about a rigid constraint: Helices and perversions
Davide Riccobelli, Giovanni Noselli, Antonio DeSimone
Mechanical instabilities can be exploited to design innovative structures, able to change their shape in the presence of external stimuli. In this work, we derive a mathematical mo…
Swimming Euglena respond to confinement with a behavioural change enabling effective crawling
Giovanni Noselli, Alfred Beran, Marino Arroyo +1
Some euglenids, a family of aquatic unicellular organisms, can develop highly concerted, large-amplitude peristaltic body deformations. This remarkable behaviour has been known for…
Smart helical structures inspired by the pellicle of euglenids
Giovanni Noselli, Marino Arroyo, Antonio DeSimone
This paper deals with a concept for a reconfigurable structure bio-inspired by the cell wall architecture of euglenids, a family of unicellular protists, and based on the relative…
Mechanics of axisymmetric sheets of interlocking and slidable rods
D. Riccobelli, G. Noselli, M. Arroyo +1
In this work, we study the mechanics of metamaterial sheets inspired by the pellicle of Euglenids. They are composed of interlocking elastic rods which can freely slide along their…
Spontaneous morphing of equibiaxially pre-stretched elastic bilayers: the role of sample geometry
Noè Caruso, Aleksandar Cvetković, Alessandro Lucantonio +2
An elastic bilayer, consisting of an equibiaxially pre-stretched sheet bonded to a stress-free one, spontaneously morphs into curved shapes in the absence of external loads or cons…
Flutter and divergence instability in the Pfluger column: experimental evidence of the Ziegler destabilization paradox
Davide Bigoni, Oleg N. Kirillov, Diego Misseroni +2
Flutter instability in elastic structures subject to follower load, the most important cases being the famous Beck's and Pfluger's columns (two elastic rods in a cantilever configu…
Detecting singular weak-dissipation limit for flutter onset in reversible systems
Davide Bigoni, Oleg N. Kirillov, Diego Misseroni +2
A `flutter machine' is introduced for the investigation of a singular interface between the classical and reversible Hopf bifurcations that is theoretically predicted to be generic…
Concurrent factors determine toughening in the hydraulic fracture of poroelastic composites
Alessandro Lucantonio, Giovanni Noselli
Brittle materials fail catastrophically. In consequence of their limited flaw-tolerance, failure occurs by localized fracture and is typically a dynamic process. Recently, experime…
The inversion of motion of bristle bots: analytical and experimental analysis
Giancarlo Cicconofri, Felix Becker, Giovanni Noselli +2
Bristle bots are vibration-driven robots actuated by the motion of an internal oscillating mass. Vibrations are translated into directed locomotion due to the alternating friction…
Poroelastic toughening in polymer gels: A theoretical and numerical study
Giovanni Noselli, Alessandro Lucantonio, Robert M. McMeeking +1
We explore the Mode I fracture toughness of a polymer gel containing a semi-infinite, growing crack. First, an expression is derived for the energy release rate within the lineariz…
Liquid Crystal Elastomer Strips as Soft Crawlers
Antonio DeSimone, Paolo Gidoni, Giovanni Noselli
In this paper, we speculate on a possible application of Liquid Crystal Elastomers to the field of soft robotics. In particular, we study a concept for limbless locomotion that is…
The deformation of an elastic rod with a clamp sliding along a smooth and curved profile
D. Misseroni, G. Noselli, D. Zaccaria +1
The design of compliant mechanisms is crucial in several technologies and relies on the availability of solutions for nonlinear structural problems. One of these solutions is given…
A robotic crawler exploiting directional frictional interactions: experiments, numerics, and derivation of a reduced model
Giovanni Noselli, Antonio DeSimone
We present experimental and numerical results for a model crawler which is able to extract net positional changes from reciprocal shape changes, i.e. 'breathing-like' deformations,…
Crawling on directional surfaces
Paolo Gidoni, Giovanni Noselli, Antonio DeSimone
In this paper we study crawling locomotion based on directional frictional interactions, namely, frictional forces that are sensitive to the sign of the sliding velocity. Surface i…