8,795 results match your criteria: ""Sapienza" Universita di Roma[Affiliation]"

Primordial black holes and their gravitational-wave signatures.

Living Rev Relativ

January 2025

Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth, PO1 3FX UK.

In the recent years, primordial black holes (PBHs) have emerged as one of the most interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could explain both some of the signals from binary black hole mergers observed in gravitational-wave detectors and an important component of the dark matter in the Universe. Significant progress has been achieved both on the theory side and from the point of view of observations, including new models and more accurate calculations of PBH formation, evolution, clustering, merger rates, as well as new astrophysical and cosmological probes.

View Article and Find Full Text PDF

Uncovering the Mechanism of Action of Antiprotozoal Agents: A Survey on Photoaffinity Labeling Strategy.

Pharmaceuticals (Basel)

December 2024

Dipartimento di Scienze della Vita, della Salute e delle Professioni Sanitarie, Università degli Studi "Link Campus University", Via del Casale di S. Pio V 44, I-00165 Rome, Italy.

, , and parasites are responsible for infectious diseases threatening millions of people worldwide. Despite more recent efforts devoted to the search for new antiprotozoal agents, efficacy, safety, and resistance issues still hinder the development of suited therapeutic options. The lack of robustly validated targets and the complexity of parasite's diseases have made phenotypic screening a preferential drug discovery strategy for the identification of new chemical entities.

View Article and Find Full Text PDF

Skin Lesion Classification Through Test Time Augmentation and Explainable Artificial Intelligence.

J Imaging

January 2025

Istituto di Scienze Applicate e Sistemi Intelligenti (ISASI), Consiglio Nazionale delle Ricerche (CNR), DHITECH, Campus Università del Salento, Via Monteroni s.n., 73100 Lecce, Italy.

Despite significant advancements in the automatic classification of skin lesions using artificial intelligence (AI) algorithms, skepticism among physicians persists. This reluctance is primarily due to the lack of transparency and explainability inherent in these models, which hinders their widespread acceptance in clinical settings. The primary objective of this study is to develop a highly accurate AI-based algorithm for skin lesion classification that also provides visual explanations to foster trust and confidence in these novel diagnostic tools.

View Article and Find Full Text PDF

: Takotsubo syndrome (TTS) shares many clinical features with acute myocardial infarction (AMI); however, its underlying pathophysiology remains elusive due to specific characteristics (i.e., reversibility, presence of stressors, and low mortality rate).

View Article and Find Full Text PDF

Light chain (AL) amyloidosis is the most common systemic amyloid disease characterized by abnormal accumulation of amyloid fibrils derived from immunoglobulin light chains (LCs). Both full-length (FL) LCs and their isolated variable (VL) and constant (CL) domains contribute to amyloid deposits in multiple organs, with the VL domain predominantly forming the fibril core. However, the role and interplay of these domains in amyloid aggregation and toxicity are poorly understood.

View Article and Find Full Text PDF

Fatigue relief in multiple sclerosis by personalized neuromodulation: A multicenter pilot study [FaremusGE].

Mult Scler Relat Disord

January 2025

Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, and Center of Excellence for Biomedical Research, University of Genoa, Genoa, Italy; Ospedale Policlinico San Martino - IRCCS, Genoa, Italy.

Background: A recent application of the GRADE guidelines indicated Faremus, a 5-day neuromodulation for 15 min per day via transcranial direct current stimulation (tDCS), as medium to highly recommendable for alleviating fatigue in multiple sclerosis (MS).

Methods: With this pilot study we aimed to evaluate the feasibility, acceptance, safety, and effectiveness of the Faremus treatment carried out in a multicenter context. The Rome unit prepared the intervention, supplied the personalized electrodes to the San Martino Hospital in Genova, where the neurological team enrolled the population of fatigued people with multiple sclerosis (PwMS) and carried out the treatment.

View Article and Find Full Text PDF

The implementation of large-scale universal quantum computation represents a challenging and ambitious task on the road to quantum processing of information. In recent years, an intermediate approach has been pursued to demonstrate quantum computational advantage via non-universal computational models. A relevant example for photonic platforms has been provided by the Boson Sampling paradigm and its variants, which are known to be computationally hard while requiring at the same time only the manipulation of the generated photonic resources via linear optics and detection.

View Article and Find Full Text PDF

The exact moment method for the determination of the dispersion tensor in retentive porous media has been adopted to compute the dispersion coefficients, the plate height curves and the kinetic performance factors of eight different 3D printable stationary phases based on triply periodic minimal surfaces (TPMS). The two cases in which the stationary phase is impermeable (hydrodynamic dispersion) or superficially retentive have been analyzed in detail. The Carman-Kozeny relationship between permeability K, hydraulic diameter d and hydrodynamic tortuosity τ holds true for all the geometries investigated with a unique shape coefficient K.

View Article and Find Full Text PDF

The 2025 Motile Active Matter Roadmap.

J Phys Condens Matter

January 2025

Biozentrum, University of Basel, Spitalstrasse 41, Basel, Basel-Stadt, 4056, SWITZERLAND.

Activity and autonomous motion are fundamental aspects of many living and engineering systems. Here, the scale of biological agents covers a wide range, from nanomotors, cytoskeleton, and cells, to insects, fish, birds, and people. Inspired by biological active systems, various types of autonomous synthetic nano- and micromachines have been designed, which provide the basis for multifunctional, highly responsive, intelligent active materials.

View Article and Find Full Text PDF

Any experiment aiming to measure rare events, like Coherent Elastic neutrino-Nucleus Scattering (CE NS) or hypothetical Dark Matter scattering, via nuclear recoils in cryogenic detectors relies crucially on a precise detector calibration at sub-keV energies. The Crab collaboration developed a new calibration technique based on the capture of thermal neutrons inside the target crystal. Together with the Nucleus experiment, first measurements with a moderated Cf neutron source and a cryogenic detector were taken.

View Article and Find Full Text PDF

In the context of organic farming, the introduction of a local product to wider markets and an evaluation of storage effects, metabolic and transcriptomic variations in two broccoli rabe genotypes from production cycles of two different years were studied by comparing florets of stored fresh (SF) and packaged (P) for 4 days with those harvested fresh from the field (H). Twenty-five hydrosoluble compounds, including amino acids, carbohydrates, and organic acids, were quantified by untargeted nuclear magnetic resonance (NMR). Principal component analysis produced a neat separation among the three commodity statuses with P being the most divergent and SF closer to H.

View Article and Find Full Text PDF

Heterogeneous fault architecture affects crustal seismotectonics and fluid migration. When studying it, we commonly rely on static conceptual models that generally overlook the absolute time dimension of fault (re)activation. Heterogenous faults, however, represent the end-result of protracted, cumulative and intricate deformation histories.

View Article and Find Full Text PDF

Atmospheric CO is thought to play a fundamental role in Earth's climate regulation. Yet, for much of Earth's geological past, atmospheric CO has been poorly constrained, hindering our understanding of transitions between cool and warm climates. Beginning ~370 million years ago in the Late Devonian and ending ~260 million years ago in the Permian, the Late Palaeozoic Ice Age was the last major glaciation preceding the current Late Cenozoic Ice Age and possibly the most intense glaciation witnessed by complex lifeforms.

View Article and Find Full Text PDF

Acute diverticulitis (AD), an inflammatory complication of diverticulosis, affects around 4% of individuals with diverticulosis, with increased incidence in older populations. This study aims to assess the impact of sarcopenia, the age-related loss of muscle mass, on the clinical decision-making and outcomes of patients with AD. A retrospective study was conducted on 237 patients admitted to the Emergency Department (ED) between January 2014 and February 2022.

View Article and Find Full Text PDF

The main categories of transition metal-mercury heterometallic compounds are briefly summarized. The attention is focused on complexes and clusters where the {Hg-Y} fragment, where Y represents a halide atom, interacts with transition metals. Most of the structurally characterized derivatives are organometallic compounds where the transition metals belong to the Groups 6, 8, 9 and 10.

View Article and Find Full Text PDF

The folding and misfolding of multidomain proteins.

Mol Aspects Med

February 2025

Istituto Pasteur - Fondazione Cenci Bolognetti and Istituto di Biologia e Patologia Molecolari Del CNR, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli", Sapienza Università di Roma, 00185, Rome, Italy. Electronic address:

Protein folding represents a vital process for any living organism. While significant insights have been gained from studying single-domain proteins, our current knowledge on the folding mechanisms of multidomain proteins remains relatively limited, primarily due to their inherent complexity. The principal aim of this review lies in summarizing the emerging view pertaining multi-domain folding, emphasizing their modular nature, which minimizes misfolding and facilitates evolutionary innovation.

View Article and Find Full Text PDF

Extracellular vesicle (EV) monitoring can complement clinical assessment of cancer response. In this study, patients with advanced non-small cell lung cancer (NSCLC) undergoing osimertinib, alectinib, pembrolizumab or platinum-based chemotherapy ± pembrolizumab were enrolled. EVs were characterized using Bradford assay to quantify the circulating cell-free EV protein content (cfEV), and dynamic light scattering to assess Rayleigh ratio excess at 90°, z-averaged hydrodynamic diameter and polydispersity index.

View Article and Find Full Text PDF

Studying how we explore the world in search of novelties is key to understand the mechanisms that can lead to new discoveries. Previous studies analyzed novelties in various exploration processes, defining them as the first appearance of an element. However, novelties can also be generated by combining what is already known.

View Article and Find Full Text PDF
Article Synopsis
  • Research reveals that rejuvenation and memory in spin glasses are linked to multiple length scales, supported by simulations from the Janus II supercomputer.
  • The study combines numerical simulations with experiments to introduce two key coefficients that measure memory in spin glasses.
  • A new coefficient from Freedberg et al. is shown to be physically equivalent by analyzing its behavior in relation to temperature and waiting time.
View Article and Find Full Text PDF

High-energy nuclear collisions create a quark-gluon plasma, whose initial condition and subsequent expansion vary from event to event, impacting the distribution of the eventwise average transverse momentum [P([p_{T}])]. Disentangling the contributions from fluctuations in the nuclear overlap size (geometrical component) and other sources at a fixed size (intrinsic component) remains a challenge. This problem is addressed by measuring the mean, variance, and skewness of P([p_{T}]) in ^{208}Pb+^{208}Pb and ^{129}Xe+^{129}Xe collisions at sqrt[s_{NN}]=5.

View Article and Find Full Text PDF

Resonant Conversion of Wave Dark Matter in the Ionosphere.

Phys Rev Lett

December 2024

Departement de Physique Theorique, Universite de Geneve, 24 quai Ernest Ansermet, 1211 Geneve 4, Switzerland.

Article Synopsis
  • Researchers are investigating how resonant dark matter can convert into low-frequency radio waves in Earth's ionosphere, particularly in the mass range of about 10^{-9} to 10^{-8} eV.
  • The typical methods for calculating this conversion are inadequate due to the nonrelativistic nature of dark matter, so a new approach involving a second-order boundary-value problem is applied.
  • Using a small dipole antenna to detect these radio waves could increase sensitivity to dark photon and axionlike particle dark matter, offering a new avenue for exploring uncharted regions of dark matter physics.
View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to determine effective cutoff scores for the Psoriatic Arthritis Impact of Disease questionnaire (PsAID12) based on disease activity measures in patients with PsA.
  • Using data from the ReFlaP study, researchers analyzed scores to define disease states such as remission and varying impact levels, employing statistical methods to establish these cutoffs.
  • Results indicated that the PsAID12 score had high diagnostic performance against established benchmarks, but further validation and expert consensus are needed to confirm the proposed cutoffs for clinical use.
View Article and Find Full Text PDF

The Cryogenic Underground Observatory for Rare Events (CUORE) is a detector array comprised by 988 5  cm×5  cm×5  cm TeO_{2} crystals held below 20 mK, primarily searching for neutrinoless double-beta decay in ^{130}Te. Unprecedented in size among cryogenic calorimetric experiments, CUORE provides a promising setting for the study of exotic throughgoing particles. Using the first tonne year of CUORE's exposure, we perform a search for hypothesized fractionally charged particles (FCPs), which are well-motivated by various standard model extensions and would have suppressed interactions with matter.

View Article and Find Full Text PDF

Primal world beliefs ("primals") capture individuals' basic understanding of what sort of world this is. How do children develop beliefs about the nature of the world? Is the world a good place? Safe or dangerous? Enticing or dull? Primals were initially introduced in social and personality psychology to understand beliefs about the world as a whole that may influence well-being and personality. This article introduces the concept of primals to developmental scientists and reviews preliminary research examining how primals relate to sociodemographic and well-being indicators.

View Article and Find Full Text PDF