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BLOCKCHAIN-RESEARCH AND APPLICATIONS 2024年第3期5卷 22-41页

作者： Buccafurri, Francesco De Angelis, vincenzo Nardone, Roberto Univ Reggio Calabria I-89124 Reggio Di Calabria Italy Univ Calabria I-87036 Arcavacata di Rende CS Italy Univ Naples Parthenope I-80143 Naples Italy

The interest in Self-Sovereign Identity (SSI) in research, industry, and governments is rapidly increasing. SSI is a paradigm where users hold their identity and credentials issued by authorized entities. SSI is revolutionizing the concept of digital identity and enabling the definition of a trust framework wherein a service provider (verifier) validates the claims presented by a user (holder) for accessing services. However, current SSI solutions primarily focus on the presentation and verification of claims, overlooking a dual aspect: ensuring that the verifier is authorized to access the holder's claims. Addressing this gap, this paper introduces an innovative SSI-based solution that integrates decentralized wallets with Ciphertext-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE). This combination effectively addresses the challenge of verifier authorization. Our solution, implemented on the Ethereum platform, enhances accountability by notarizing key operations through a smart contract. This paper also offers a prototype demonstrating the practicality of the proposed approach. Furthermore, it provides an extensive evaluation of the solution's performance, emphasizing its feasibility and efficiency in real-world applications.

关键词： Blockchain IPFS Self Sovereign Identity Smart contract Access control PROXY RE-ENCRYPTION SCHEME

Data-driven diagnosis of high temperature PEM fuel cells based on the electrochemical impedance spectroscopy: Robustness improvement and evaluation

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Journal of Energy Chemistry 2024年第9期96卷 544-558页

作者： Dan Yu Xingjun Li Samuel Simon Araya Simon Lennart Sahlin vincenzo Liso Department of Energy Aalborg UniversityAalborg 9220Denmark Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA Materials Research and Technology Development Luxembourg Institute of Science and Technology(LIST)4422 BelvauxLuxembourg

Utilizing machine learning techniques for data-driven diagnosis of high temperature PEM fuel cells is beneficial and meaningful to the system durability. Nevertheless, ensuring the robustness of diagnosis remains a critical and challenging task in real application. To enhance the robustness of diagnosis and achieve a more thorough evaluation of diagnostic performance, a robust diagnostic procedure based on electrochemical impedance spectroscopy (EIS) and a new method for evaluation of the diagnosis robustness was proposed and investigated in this work. To improve the diagnosis robustness: (1) the degradation mechanism of different faults in the high temperature PEM fuel cell was first analyzed via the distribution of relaxation time of EIS to determine the equivalent circuit model (ECM) with better interpretability, simplicity and accuracy;(2) the feature extraction was implemented on the identified parameters of the ECM and extra attention was paid to distinguishing between the long-term normal degradation and other faults;(3) a Siamese Network was adopted to get features with higher robustness in a new embedding. The diagnosis was conducted using 6 classic classification algorithms—support vector machine (SVM), K-nearest neighbor (KNN), logistic regression (LR), decision tree (DT), random forest (RF), and Naive Bayes employing a dataset comprising a total of 1935 collected EIS. To evaluate the robustness of trained models: (1) different levels of errors were added to the features for performance evaluation;(2) a robustness coefficient (Roubust_C) was defined for a quantified and explicit evaluation of the diagnosis robustness. The diagnostic models employing the proposed feature extraction method can not only achieve the higher performance of around 100% but also higher robustness for diagnosis models. Despite the initial performance being similar, the KNN demonstrated a superior robustness after feature selection and re-embedding by triplet-loss method, which sug

关键词： PEM fuel cell Data-driven diagnosis Robustness improvement and evaluation Electrochemical impedance spectroscopy

Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy

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Light(Science & Applications) 2024年第4期13卷 696-705页

作者： Jiapeng Wang Hongpeng Wu Angelo Sampaolo Pietro Patimisco vincenzo Spagnolo Suotang Jia Lei Dong State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China. Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China. PolySense Lab Dipartimento Interateneo di FisicaUniversity and Politecnico of BariCNR-IFNVia Amendola 17370126 BariItaly

The extension of dual-comb spectroscopy(DCS)to all wavelengths of light along with its ability to provide ultralarge dynamic range and ultra-high spectral resolution,renders it extremely useful for a diverse array of applications in physics,chemistry,atmospheric science,space science,as well as medical *** this work,we report on an innovative technique of quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy(QEMR-PAS),in which the beat frequency response from a dual comb is frequency down-converted into the audio frequency *** this way,gas molecules act as an optical-acoustic converter through the photoacoustic effect,generating heterodyne sound *** conventional DCS,where the light wave is detected by a wavelengthdependent photoreceiver,QEMR-PAS employs a quartz tuning fork(QTF)as a high-Q sound transducer and works in conjunction with a phase-sensitive detector to extract the resonant sound component from the multiple heterodyne acoustic tones,resulting in a straightforward and low-cost hardware *** novel QEMRPAS technique enables wavelength-independent DCS detection for gas sensing,providing an unprecedented dynamic range of 63 dB,a remarkable spectral resolution of 43 MHz(or~0.3 pm),and a prominent noise equivalent absorption of 5.99×10^(-6)cm^(-1)·Hz-1/2.

关键词： Quartz hardware resonant

Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave,high-power,wide-tunable,singlelongitudinal-mode solid-state laser

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Light(Science & Applications) 2024年第5期13卷 941-956页

作者： Shunda Qiao Ying He Haiyue Sun Pietro Patimisco Angelo Sampaolo vincenzo Spagnolo Yufei Ma National Key Laboratory of Laser Spatial Information Harbin Institute of TechnologyHarbinChina PolySense Lab Dipartimento Interateneo di FisicaUniversity and Politecnico of BariVia AmendolaBariItaly

Photoacoustic spectroscopy(PAS)as a highly sensitive and selective trace gas detection technique has extremely broad application in many ***,the laser sources currently used in PAS limit the sensing *** to diode laser and quantum cascade laser,the solid-state laser has the merits of high optical power,excellent beam quality,and wide tuning *** we present a long-wave,high-power,wide-tunable,singlelongitudinal-mode solid-state laser used as light source in a PAS sensor for trace gas *** self-built solid-state laser had an emission wavelength of~2μm with Tm:YAP crystal as the gain material,with an excellent wavelength and optical power stability as well as a high beam *** wide wavelength tuning range of 9.44 nm covers the absorption spectra of water and ammonia,with a maximum optical power of~130 mW,allowing dual gas detection with a single laser *** solid-state laser was used as light source in three different photoacoustic detection techniques:standard PAS with microphone,and external-and intra-cavity quartz-enhanced photoacoustic spectroscopy(QEPAS),proving that solid-state laser is an attractive excitation source in photoacoustic spectroscopy.

关键词： power tunable tuning

Structural Health Monitoring by Accelerometric Data of a Continuously Monitored Structure with Induced Damages

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Structural Durability & Health Monitoring 2024年第6期18卷 739-762页

作者： Giada Faraco Andrea vincenzo De Nunzio Nicola Ivan Giannoccaro Arcangelo Messina Department of Innovation Engineering University of SalentoLecce73100Italy

The possibility of determining the integrity of a real structure subjected to non-invasive and non-destructive monitoring,such as that carried out by a series of accelerometers placed on the structure,is certainly a goal of extreme and current *** the present work,the results obtained from the processing of experimental data of a real structure are *** analyzed structure is a lattice structure approximately 9 m high,monitored with 18 uniaxial accelerometers positioned in pairs on 9 different *** data used refer to continuous monitoring that lasted for a total of 1 year,during which minor damage was caused to the structure by alternatively removing some bracings and repositioning them in the *** methodologies detecting damage based on decomposition techniques of the acquired data were used and tested,as well as a methodology combining the two *** results obtained are extremely interesting,as all the minor damage caused to the structure was identified by the processing methods used,based solely on the monitored data and without any knowledge of the real structure being *** results use 15 acquisitions in environmental conditions lasting 10 min each,a reasonable amount of time to get immediate feedback on possible damage to the structure.

关键词： Structural health monitoring damage detection vibration measurements stochastic subspace identification

Quick and easy assessment of sarcopenia in cirrhosis: Can ultrasound be the solution?

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World Journal of Gastroenterology 2024年第17期30卷 2287-2293页

作者： Francesca Campani Tancredi vincenzo Li Cavoli Umberto Arena Fabio Marra Erica Nicola Lynch Claudia Campani Department of Health Science University Hospital CareggiUniversity of FlorenceFlorence 50134Italy Internal Medicine and Liver Unit University Hospital CareggiUniversity of FlorenceFlorence 50134Italy Department of Experimental and Clinical Medicine University of FlorenceFlorence 50134Italy Gastroenterology Research Unit Department of Experimental and Clinical Biomedical Sciences“Mario Serio”University of FlorenceFlorence 50134Italy Department of Medical Biotechnologies University of SienaSiena 53100Italy

Cirrhosis is frequently associated with sarcopenia,with reported rates of over 80%in patients with decompensated alcohol-related liver *** nega-tively impacts the prognosis of cirrhotic patients and affects the response to treatment of patients with hepatocellular carcinoma(HCC).For these reasons,identifying an easy-to-perform method to assess sarcopenia in is a key element in the optimization of care in this patient *** of muscle mass by computed tomography is considered the standard of care for the diagnosis of sarcopenia,but exposure to radiation and high costs limit its application in this setting,especially for repeated *** believe that ultrasound,a cheap and harmless technique also used for HCC screening in cirrhotic patients,could have an expanding role in the diagnosis and follow-up of sarcopenia in these patients.

关键词： Sarcopenia Ultrasound Cirrhosis Hepatocellular carcinoma Computed tomography

Testosterone replacement therapy and vascular thromboembolic events: a systematic review and meta-analysis

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Asian Journal of Andrology 2024年第2期26卷 144-154页

作者： Rossella Cannarella Carmelo Gusmano Claudia Leanza vincenzo Garofalo Andrea Crafa Federica Barbagallo Rosita A Condorelli Sandro La Vignera Aldo E Calogero Department of Clinical and Experimental Medicine University of CataniaCatania 95123Italy Glickman Urological&Kidney Institute Cleveland Clinic FoundationClevelandOH44195USA

To evaluate the relationship between testosterone replacement therapy(TRT)and arterial and/or venous thrombosis in patients with pre-treatment total testosterone(TT)<12 nmol I^(-1),we performed a meta-analysis following the Population Intervention Comparison Outcome ***:men with TT<12 nmol I^(-1) or clear mention of hypogonadism in the inclusion criteria of patients;intervention:TRT;comparison:placebo or no therapy;outcomes:arterial thrombotic events(stroke,myocardial infarction[MI],upper limbs,and lower limbs),VTE(deep vein thrombosis[DVT],portal vein thrombosis,splenic thrombosis,and pulmonary embolism),and mortality.A total of 2423 abstracts were assessed for ***-four studies,including 14 randomized controlled trials(RCTs),were finally included,with a total of 4027 and 310288 hypotestosteronemic male patients,from RCTs and from observational studies,*** on RCT-derived data,TRT did not influence the risk of arterial thrombosis(odds ratio[OR]=1.27,95%confidence interval[CI]:0.47-3.43,P=0.64),stroke(OR=1.34,95%CI:0.09-18.97,P=0.83),MI(OR=0.51,95%CI:0.11-2.31,P=0.39),VTE(OR=1.42,95%CI:0.22-9.03,P=0.71),pulmonary embolism(OR=1.38,95%CI:0.27-7.04,P=0.70),and mortality(OR=0.70,95%CI:0.20-2.38,P=0.56).Meanwhile,when only observational studies are considered,a significant reduction in the risk of developing arterial thrombotic events,Ml,venous thromboembolism,and mortality was *** risk for DVT remains uncertain,due to the paucity of RCT-based *** in men with TT<12 nmol I^(-1) is safe from the risk of adverse cardiovascular *** studies specifically assessing the risk of DVT in men on TRT are needed.

关键词： hypogonadism testosterone testosterone replacement therapy thromboembolism thrombosis TRT

Novel epigenetic-based therapies useful in cardiovascular medicine

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World Journal of Cardiology 2016年第2期8卷 211-219页

作者： Claudio Napoli vincenzo grimaldi Maria Rosaria De Pascale Linda Sommese Teresa Infante Andrea Soricelli Division of Immunohematology Transfusion Medicine and Transplant ImmunologyDepartment of Internal Medicine and Specialistic UnitAzienda Ospedaliera Universitaria (AOU)Second University of Naples Institute of Diagnostic and Nuclear Development(SDN) IRCCS

Epigenetic modifications include DNA methylation, his-tone modifications, and micro RNA. Gene alterations have been found to be associated with cardiovascular diseases, and epigenetic mechanisms are continuously being studied to find new useful strategies for the clinical management of afflicted patients. Numerous cardiovascular disorders are characterized by the abnormal methylation of Cp G islands and so specific drugs that could inhibit DNA methyltransferase directly or by reducing its gene expression(e.g., hydralazine and procainamide) are currently under investigation. The anti-proliferative and anti-inflammatory properties of histone deacetylase inhibitors and their cardio-protective effects have been confirmed in preclinical studies. Furthermore, the regulation of the expression of micro RNA targets through pharmacological tools is still under development. Indeed, large controlled trials are required to establish whether current possible candidate antisense micro RNAs could offer better therapeutic benefits in clinical practice. Here, we updated therapeutic properties, side effects, and feasibility of eme-rging epigenetic-based strategies in cardiovascular diseases by highlighting specific problematic issues that still affect the development of large scale novel therapeutic protocols.

关键词： Epigenetics Cardiovascular diseases Heart failure Inhibitors of histone deacetylases Antisense microRNAs

Dewatering of Scenedesmus obliquus Cultivation Substrate with Microfiltration:Potential and Challenges for Water Reuse and Effective Harvesting

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Engineering 2024年第7期38卷 155-163页

作者： Marco Malaguti Lorenzo Craveri Francesco Ricceri vincenzo Riggio Mariachiara Zanetti Alberto Tiraferri Department of Environment Land and Infrastructure EngineeringPolitecnico di TorinoTorino 10129Italy Clean Water Center Politecnico di TorinoTorino 10129Italy

In the microalgae harvesting process,which includes a step for dewatering the algal suspension,directly reusing extracted water in situ would decrease the freshwater footprint of cultivation *** various algae harvesting techniques,membrane-based filtration has shown numerous *** study evaluated the reuse of permeate streams derived from Scenedesmus obliquus(***)biomass filtration under bench-scale and pilot-scale *** particular,this study identified a series of challenges and mechanisms that influence the water reuse potential and the robustness of the membrane harvesting *** a preliminary phase of this investigation,the health status of the initial biomass was found to have important implications for the harvesting performance and quality of the permeate stream to be reused;healthy biomass ensured better dewatering performance(i.e.,higher water fluxes)and higher quality of the permeate water streams.A series of bench-scale filtration experiments with different combinations of cross-flow velocity and pressure values were performed to identify the operative conditions that would maximize water *** selected conditions,2.4 m·s^(-1)and 1.4 bar(1 bar=105 Pa),respectively,were then applied to drive pilot-scale microfiltration tests to reuse the collected permeate as a new cultivation medium for *** growth in a pilot-scale *** investigation revealed key differences between the behavior of the membrane systems at the two scales(bench and pilot).It indicated the potential for beneficial reuse of the permeate stream as the pilot-scale experiments ensured high harvesting performance and growth rates of biomass in permeate water that were highly similar to those recorded in the ideal cultivation ***,different nutrient reintegration protocols were investigated,revealing that both macro-and micro-nutrient levels are critical for the success of the reuse approach.

关键词： Scenedesmus obliquus Microfiltration Permeate reuse Harvesting Microalgae Pilot-scale

Laser-optimized Pt-Y alloy nanoparticles embedded in Pt-Y oxide matrix for high stability and ORR electrocatalytic activity

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Journal of Energy Chemistry 2024年第5期92卷 508-520页

作者： Riccardo Brandiele Andrea Guadagnini Mattia Parnigotto Federico Pini Vito Coviello Denis Badocco Paolo Pastore Gian Andrea Rizzi Andrea Vittadini Daniel Forrer vincenzo Amendola Christian Durante Department of Chemical Sciences University of PaduaVia Marzolo 135131 PadovaItaly Istituto di Chimica della Materia Condensata e di Tecnologie per l’Energia ICMATE-CNR via Marzolo 1 I-35131 PadovaItaly

The development of active yet stable catalysts for oxygen reduction reaction(ORR)is still a major issue for the extensive permeation of fuel cells into everyday *** nanostructured Pt catalysts are to date the best available systems in terms of activity,the same is not true for stability,particularly under operating *** this work,Pt_(Х)Y alloy nanoparticles are proposed as active and durable electrocatalysts for ***_(Х)Y nanoalloys are synthesized and further optimized by laser ablation in liquid followed by laser fragmentation in *** novel integrated laser-assisted methodology succeeded in producing Pt_(Х)Y nanoparticles with the ideal size(1000 A g^(-1).At the same time,the nanoalloys are embedded in a fine Pt oxide matrix,which allows a greater stability of the catalyst than the commercial Pt reference,as directly verified on a gas diffusion electrode.

关键词： Electrocatalysis GDE ORR Pt_(2)Y Pt_(3)Y LAL LFL Oxide support Pto Nanoalloys