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Giant multiphononic effects in a perovskite oxide

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npj Computational Materials 2023年第1期9卷 1352-1358页

作者： Claudio Cazorla Massimiliano Stengel JorgeÍñiguez riccardo Rurali Departament de Física Universitat Politècnica de CatalunyaCampus Nord B4-B5Barcelona 08034Spain Institut de Ciència de Materials de Barcelona ICMAB–CSICCampus UAB08193 BellaterraSpain ICREA-InstitucióCatalana de Recerca i Estudis Avançats 08010 BarcelonaSpain Materials Research and Technology Department Luxembourg Institute of Science and Technology(LIST)Avenue des Hauts-Fourneaux 5L-4362 Esch/AlzetteLuxembourg Department of Physics and Materials Science University of Luxembourg41 Rue du BrillL-4422 BelvauxLuxembourg

Perovskite oxides offer tremendous potential for applications in information storage and energy conversion,owing to a subtle interplay between their spin,charge,orbital and lattice degrees of ***,we further expand the possible range of perovskite oxides operation towards the fields of thermal management and thermal computing by exploiting an exceptional synergy between different ferroic *** propose dynamical control of the heat flow in a distinctive family of perovskite oxides obtained via the application of small electric(~10 kV/cm)and/or magnetic(~1 T)*** on first-principles simulations,we predict a relative heat conductivity variation of~100%in SrMnO_(3) thin films near room temperature resulting from a phase transition that involves huge changes in both the magnetization and electric *** disclosed giant multiphononic effects are fundamentally caused by anharmonic spin-phonon couplings that strongly influence the mean lifetime of phonons.

关键词： perovskite oxides exceptional

Biaxial versus uniaxial strain tuning of single-layer MoS_(2)

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Nano Materials Science 2022年第1期4卷 44-51页

作者： Felix Carrascoso riccardo Frisenda Andres Castellanos-Gomez Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM-CSIC)28049Madrid Spain

Strain engineering has arisen as a powerful technique to tune the electronic and optical properties of twod imensional semiconductors like molybdenum disulfide(MoS_(2)).Although several theoretical works predicted that biaxial strain would be more effective than uniaxial strain to tune the band structure of MoS_(2),a direct experimental verification is still missing in the *** we implemented a simple experimental setup that allows to apply biaxial strain through the bending of a cruciform polymer *** used the setup to study the effect of biaxial strain on the differential reflectance spectra of 12 single-layer MoS_(2)flakes finding a redshift of the excitonic features at a rate between-40 meV/%and-110 meV/%of biaxial *** also directly compare the effect of biaxi al and uniaxial strain on the same single-layer MoS_(2)finding that the biaxial strain gauge factor is 2.3 times larger than the uniaxial strain one.

关键词： finding layer gauge

DICE:An open-source MATLAB application for quantification and parametrization of digital outcrop model-based fracture datasets

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第5期15卷 1090-1110页

作者： Niccolò Menegoni Daniele Giordan riccardo Inama Cesare Perotti Department of Earth and Environmental Sciences University of PaviaPavia27100Italy National Research Council of Italy Research Institute for Geo-Hydrological Protection(CNR-IRPI)Torino10135Italy Signal S.r.l. Via Fratelli Cuzio 42Pavia27100Italy

An open-source MATLAB application(app)named Discontinuity Intensity Calculator and Estimator(DICE)was developed in order to quantitatively characterize the fractures,or in more general,discontinuities within a rocky outcrop in three-dimensional(3D)digital data,such as digital outcrop model(DOM).The workflow proposed for the parametrization of the discontinuities consists of the following steps:(1)Analysis and mapping of the fractures detected within the 3D DOMs;(2)Calculation of the orientation,position and dimensions of discontinuities that are represented by best-fit circular planes;(3)Determining the discontinuity parameters(dimension,distribution,spacing and intensity)by the DICE algorithm using different 3D oriented sampling techniques(3D oriented scanline,3D oriented circular scan window and spherical scan volume).Different sampling methods were bench tested with a synthetic,as well as a natural case study,and compared in order to understand the advantages and limitations of each *** 3D oriented circular scan window appears to be the most effective method for fracture intensity estimation with high accuracy(error 0.4%)and stability with variations in scan radius.

关键词： Fracture parameter Discontinuity Fault Fracture intensity Linear fracture intensity(P10) Areal fracture intensity(P21) Volumetric fracture intensity(P32)

Assessing the operational design domain of lane support system for automated vehicles in different weather and road conditions

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第4期9卷 631-644页

作者： Giuseppina Pappalardo riccardo Caponetto Rosario Varrica Salvatore Cafiso Department of Civil Engineering and Architecture University of CataniaCatania 95125Italy Department of Electrical Electronic and Computer EngineeringUniversity of CataniaCatania 95125Italy

With the growing rate of automated vehicles(AVs)at the lower level of automation,the experimental tests are also in progress with vehicles at higher *** the absence of extended digital infrastructures and deployment of level 5 full automated vehicles,the physical infrastructure is required to maintain a fundamental role to enable their introduction in public *** paper focuses on lane support system(LSS)whose operational design domain(ODD)is strongly connected to the road characteristics and *** experimental test was carried out with a state of the art,and LSS and advanced technologies were used for road monitoring on different roads under various environmental conditions including dry,wet pavements and *** applied the generalized estimation equation for logistic regression to account within-cluster homogeneity which is induced by repeated measures on the same road *** models allow the identification of variables that are significant for the LSS fault probability among various effects of road features including marking,pavement distress,weather conditions,horizontal curvature,and cross *** pointed out the relevance of the wet retro-reflection of marking(RLw)and the horizontal curvature in the definition of ODD for *** values have been proposed for the tested *** pavement doesn’t affect the LSS performance when compared to the dry *** was shown to be critical even with very good road characteristics.

关键词： Lane support system Physical infrastructure Operational design domain Weather condition

A multidisciplinary approach in recognizing seep-carbonates:A case study from the Loiano Formation(late Eocene)in the northern Apennines(Italy)

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Science China Earth Sciences 2023年第11期66卷 2635-2647页

作者： Stefano CONTI Filippo PANINI Pietro PATTERI riccardo RONDELLI Daniele MALFERRARI Department of Chemical and Geological Sciences University of Modena and Reggio EmiliaVia Campi 103I-41125ModenaItaly

Carbonate deposits related to active seeps are documented along most continental margins and are characterized by peculiar seep-related facies and by chemical(isotope signature),paleontological and mineralogical *** fossil analogues are recognized all over the world by the same features and occurred since the beginning of *** this paper,we present a new seep outcrop(Castagneto village,Reggio Emilia,northern Italy)belonging to the late Eocene Loiano Formation which,to our knowledge,is in Italy the most ancient seep deposit with not-reworked chemosymbiotic *** outcrop can be roughly divided into two portions,a northern part showing abundant presence of macrofossils in silty carbonate matrix and subhorizontal subdivisions,and a southern part,where macrofossils are almost absent,characterized by sub-vertical internal subdivisions and a clear vertical structure consisting of the rhythmic alternation of light and dark *** analysis of samples from the southern portion showed the occurrence of authigenic calcite and pyrite,the latter with a peculiar framboidal *** feature,together with the occurrence of chemosymbiotic species and~(13)C isotope depletion,suggests possible hydrocarbon-rich fluid-related genesis and provides useful criteria for identifying hydrocarbon-rich fluid-related deposits in geologic units.

关键词： Framboid Lucinids Methane Pyrite Seepage SMTZ

Weighted‑indexed semi‑Markov model:calibration and application to financial modeling

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Financial Innovation 2023年第1期9卷 916-931页

作者： riccardo De Blasis Department of Management Marche Polytechnic UniversityAnconaItaly

We address the calibration issues of the weighted-indexed semi-Markov chain(WISMC)model applied to high-frequency financial ***,we propose to automate the discretization of the price returns and the volatility index by using four different approaches,two based on statistical quantities,namely,the quantile and sigma discretization,and two derived by the application of two popular machine learning algorithms,namely the k-means and Gaussian mixture model(GMM).Moreover,by comparing the Bayesian information criterion(BIC)scores,the GMM approach allows for the selection of the number of states of returns and *** application to Bitcoin prices at 1-min and 1-s intervals shows the validity and usefulness of the proposed discretization *** particular,GMM discretization is well suited for highfrequency returns,whereas the quantile approach works better for low-frequency ***,by comparing the results of the Monte Carlo simulation,we show that the WISMC model,applied with the proposed discretization,can reproduce the longrange serial correlation of the squared returns,which is typical of the financial markets and,in particular,the cryptocurrency market.

关键词： Semi-Markov WISMC Bitcoin EWMA k-means GMM

Quantitative computed tomography-based approaches for noninvasive diagnosis of portal hypertension in patients with cirrhosis

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Portal Hypertension & Cirrhosis 2023年第2期2卷 92-97页

作者： riccardo Sartoris Valerie Vilgrain Radiology Department Hôpital BeaujonClichyFrance Universitéde Paris Cité ParisFrance

Noninvasive diagnosis of portal hypertension in patients with cirrhosis can be achieved using different methods,including laboratory tests and *** Baveno VII consensus suggested that liver stiffness measurements and platelet counts were sufficient for assessing the presence of clinically significant portal ***,computed tomography(CT)is frequently performed in patients with cirrhosis,and numerous studies have established the possibility of an opportunistic noninvasive diagnosis of portal hypertension using *** studies have utilized radiomics,volumetric changes in the liver and spleen,quantitative assessment of liver surface nodularity,and more advanced techniques based on computational fluid *** review summarizes the main original studies related to the quantitative CT-based noninvasive diagnosis of portal hypertension.

关键词： cirrhosis computed tomography liver stiffness measurement noninvasive diagnose portal hypertension

Radiological findings in non-surgical recurrent hepatocellular carcinoma:From locoregional treatments to immunotherapy

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World Journal of Gastroenterology 2023年第11期29卷 1669-1684页

作者： Davide Ippolito Cesare Maino Marco Gatti Paolo Marra riccardo Faletti Francesco Cortese riccardo Inchingolo Sandro Sironi Department of Radiology IRCCS San Gerardo dei TintoriMonza 20900Italy School of Medicine and Surgery University of Milano-BicoccaMilano 20121Italy Department of Surgical Sciences University of TurinTurin 10126Italy Department of Diagnostic and Interventional Radiology Papa Giovanni ⅩⅩⅢ HospitalBergamo 24127Italy Interventional Radiology Unit “F.Miulli”Regional General HospitalBari 70121Italy

Since hepatocellular carcinoma(HCC)represents an important cause of mortality and morbidity all over the ***,it is fundamental not only to achieve a curative treatment but also to manage in the best way any possible *** if the latest update of the Barcelona Clinic Liver Cancer guidelines for HCC treatment has introduced new locoregional techniques and confirmed others as well-established clinical practices,there is still no consensus about the treatment of recurrent HCC(RHCC).Locoregional treatments and medical therapy represent two of the most widely accepted approaches for disease control,especially in the advanced stage of liver *** medical treatments are now approved,and others are under *** this basis,radiology plays a central role in the diagnosis of RHCC and the assessment of response to locoregional treatments and medical therapy for *** review summarized the actual clinical practice by underlining the importance of the radiological approach both in the diagnosis and treatment of RHCC.

关键词： Carcinoma Hepatocellular Liver Ablation Catheter Radio frequency ablation Ablation techniques Medication therapy management RECIST

Percutaneous insertion of a novel dedicated metal stent to treat malignant hilar biliary obstruction

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World Journal of Gastrointestinal Oncology 2022年第9期14卷 1833-1843页

作者： Francesco Cortese Fabrizio Acquafredda Andrea Mardighian Maria Teresa Zurlo Valentina Ferraro riccardo Memeo Stavros Spiliopoulos riccardo Inchingolo Interventional Radiology Unit Miulli HospitalAcquaviva Delle Fonti 70124Italy Unit of Hepatobiliary Surgery Miulli hospitalAcquaviva Delle Fonti 70124Italy 2nd Radiology Department National and Kapodistrian University of AthensChaidari Athens 12461Greece

BACKGROUND Percutaneous bilateral biliary stenting is an established method for the management of unresectable malignant hilar biliary *** To evaluate the efficacy and safety of a novel uncovered biliary stent, specifically designed for hilar *** This, single-center, retrospective study included 18 patients(mean age 71 ± 11 years;61.1% male) undergoing percutaneous transhepatic Moving cell stent(MCS) placement for hilar reconstruction using the stent-in-stent technique for malignant biliary strictures, between November 2020 and July 2021. The Patients were diagnosed with cholangiocarcinoma(12/18;66.6%), gallbladder cancer(5/18;27.7%), and colorectal liver metastasis(1/18;5.5%). Primary endpoints were technical(appropriate stent placement) and clinical(relief from jaundice) success. Secondary endpoints included stent patency, overall survival, complication rates and stent-related *** The technical and clinical success rates were 100%(18/18 cases). According to Kaplan-Meier analysis, the estimated overall patient survival was 80.5% and 60.4% at 6 and 12 mo respectively, while stent patency was 90.9% and 68.2% at 6 mo and 12 mo respectively. The mean stent patency was 172.53 ± 56.20 d and median stent patency was 165 d(range 83-315). Laboratory tests for cholestasis significantly improved after procedure: mean total bilirubin decreased from 15.2 ± 6.0 mg/d L to 1.3 ± 0.4 mg/d L(P < 0.001);mean γGT decreased from 1389 ± 832 U/L to 114.6 ± 53.5 U/L(P < 0.001). One periprocedural complication was reported. Stent-related complications were observed in 5 patients(27.7%), including 1 occlusion(5.5%) and 1 stent migration(5.5 %).CONCLUSION Percutaneous hilar bifurcation biliary stenting with the MCS resulted in excellent clinical and technical success rates, with acceptable complication rates. Further studies are needed to confirm these initial positive results.

关键词： Malignant hilar biliary obstructions Hilar cholangiocarcinoma Self-expandable metallic stent Stent-in-stent technique Percutaneous approach Bilateral Y-stenting