
Fractional Orlicz-Sobolev embeddings
The optimal Orlicz target space and the optimal rearrangement-
invariant target space are exhibited for embeddings of fractional-order Orlicz-
Sobolev spaces W^{s,A}(R^n). Related Hardy type inequalities are proposed as well.
Versions for fractional Orlicz-Sobolev seminorms of the Bourgain-Brezis-Mironescu
theorem on the limit as s->1^- and of the Maz'ya-Shaposhnikova theorem on the
limit as s ->0^+ are established. This is a joint work with Andrea Cianchi, Lubos
Pick and Lenka Slavikova.
An eigenvalue problem in anisotropica Orlicz.Sobolev spaces
The existence of eigenfunctions for a class of fully anisotropic elliptic equations is estab-
lished. The relevant equations are associated with constrained minimization problems for inte-
gral functionals depending on the gradient of competing functions through general anisotropic
Young functions. In particular, the latter need neither be radial, nor have a polynomial growth,
and are not even assumed to satisfy the so called 2-condition. In particular, our analysis re-
quires the development of some new aspects of the theory of anisotropic Orlicz-Sobolev spaces.
This is a joint work with G.
Semiflexible polymers under large amplitude oscillatory shear flow
The non-equilibrium structural and dynamical properties of semiflexible polymers confined to two dimensions under oscillatory shear flow are investigated by Brownian multi-particle collision dynamics. Two different scenarios will be considered: Filaments with both fixed ends [1] and wall-anchored chains [2].The results of the numerical studies will be presented and discussed.
1] A. Lamura, R. G. Winkler, 'Tethered semiflexible polymer under large amplitude oscillatory shear', Polymers 11, 737 (2019)
[2] A. Lamura, R. G. Winkler, G.
Game of neutrophils: modeling the balance between apoptosis and necrosis
Background: Neutrophils are one of the key players in the human innate immune system (HIIS). In the event of an insult where the body is exposed to inflammation triggering moieties (ITMs), neutrophils are mobilized towards the site of insult and antagonize the inflammation. If the inflammation is cleared, neutrophils go into a programmed death called apoptosis.
A Langevin dynamics approach for multi-layer mass transfer problems
We use Langevin dynamics simulations to study the mass diffusion problem across two adjacent porous layers of different transport properties. At the interface between the layers, we impose the Kedem-Katchalsky (KK) interfacial boundary condition that is well suited in a general situation. A detailed algorithm for the implementation of the KK interfacial condition in the Langevin dynamics framework is presented. As a case study, we consider a two-layer diffusion model of a drug-eluting stent.
Anomaly detection in multichannel data using sparse representation in radwt frames
We introduce a new methodology for anomaly detection (AD) in multichannel fast oscillating signals based on nonparametric penalized regression. Assuming the signals share similar shapes and characteristics, the estimation procedures are based on the use of the Rational-Dilation Wavelet Transform (RADWT), equipped with a tunable Q-factor able to provide sparse representations of functions with different oscillations persistence. Under the standard hypothesis of Gaussian additive noise, we model the signals by the RADWT and the anomalies as additive in each signal.
Joining European Scientific Forces to Face Pandemics
Despite the international guidelines on the containment of the coronavirus disease 2019 (COVID-19) pandemic, the European scientific community was not sufficiently prepared to coordinate scientific efforts. To improve preparedness for future pandemics, we have initiated a network of nine European-funded Cooperation in Science and Technology (COST) Actions that can help facilitate inter-, multi-, and trans-disciplinary communication and collaboration.
Limits of fractional Orlicz-Sobolev spaces
Extended versions of the Bourgain-Brezis-Mironescu theorems on the limit as
s->1^- of the Gagliardo-Slobodeckij fractional seminorm are established in the
Orlicz space setting. The results hold for fractional Orlicz-Sobolev spaces built upon
general Young functions, as well. The case of Young functions with an asymptotic
linear growth is also considered in connection with the space of functions of bounded
variation.
An extended version of the Maz'ya-Shaposhnikova theorem on the limit as s->0^+
of the Gagliardo-Slobodeckij fractional seminorm is established in the Orlicz
space setting.
High-resolution analysis of the human retina miRNome reveals isomiR variations and novel microRNAs
MicroRNAs play a fundamental role in retinal development and function. To characterise the miRNome of the human retina, we carried out deep sequencing analysis on sixteen individuals. We established the catalogue of retina-expressed miRNAs, determined their relative abundance and found that a small number of miRNAs accounts for almost 90% of the retina miRNome. We discovered more than 3000 miRNA variants (isomiRs), encompassing a wide range of sequence variations, which include seed modifications that are predicted to have an impact on miRNA action.





