Archivio Istituzionale della Ricerca - Università degli Studi della Campania "Luigi Vanvitelli"
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Determination and reactivity of bifurcation angle and circulation of blood carrying ternary nanoparticles through the electroosmotic pumping in a catheterized stenotic bifurcated artery having compliant walls with heat transfer
No full textIn the current work, the impacts of electroosmotic forces and bifurcation angle are investigated using a second-grade fluid model containing ternary nanoparticles (Ag(Silver), Cu(copper), and CuO(copper oxide)) through the catheterized stenotic bifurcated artery having flexible walls. The circulation system in the human body is made up of a network of veins with bifurcations. Blood flows along vessel segments in a Newtonian manner. A theoretical investigation is conducted using the developed equations in conjunction with the experimental values of blood and nanoparticles. For the sake of the normalized and uncomplicated two-directional velocity equations, mild stenotic presumption is taken into consideration. An analytical approach through programming using Mathematica is applied to obtain the closed-form solutions. Furthermore, hemodynamic effects are also calculated to analyze the flow of blood in the atherosclerotic artery. The plot of the velocity profile will allow comparison with the parent artery and the daughter artery. A graphical representation is used to illustrate the theoretical foundations of the nanoparticle-based concept in the biomedical field. Blood circulation and pressure between non-atherosclerotic and atherosclerotic arterial segments are considered to differ. The temperature, velocity, and wall shear stress are inversely proportional to the bifurcation angle. In two-bifurcated models, variations in bifurcation angles do not affect the parent artery segment. Smaller shear stress is observed at the corner of the external wall and relatively higher at the daughter artery part. The results of this study are very beneficial for biomedical research and drug transportation. Some of the significant observations obtained through this modeling would establish an appropriate method of developing tools or devices to manage concerns related to medication administration
Effetti delle violazioni dello Stato di diritto nell’esecuzione del mandato d’arresto europeo e nelle procedure di estradizione e consegna verso Paesi terzi
No full textIl contributo intende indagare e mettere a confronto, alla luce della giurisprudenza della Corte di giustizia dell’Unione europea, gli effetti delle violazioni dello Stato di diritto sulla cooperazione giudiziaria penale europea ed extra-europea, utilizzando quale banco di prova, da un lato, l’istituto del mandato d’arresto europeo e, dall’altro, le procedure di estradizione e consegna verso Paesi terzi
Systematic review on the effects of wastewater chemical composition on crop yield under fertigation practices
No full textThe escalating global demand for freshwater resources poses significant challenges to sustainable agricultural practices. This systematic review examines the influence of inorganic ions' concentration in wastewater on crop yields under fertigation, with a particular focus on compliance with the recommendations of FAO water quality standards. The review reveals that key nutrients, such as nitrates (NO3−) and phosphates (PO43−), largely meet established thresholds, while sodium (Na+) and potassium (K+) frequently exceed permissible levels, threatening crop productivity, especially in salinity-sensitive species. Additionally, the study explores the effects of nutrient variability on crop performance across different soil types and cultivation environments. Statistical analyses were performed to assess chemical composition and their correlation with agricultural yields. The findings emphasize the critical need to adapt fertigation practices to the specific characteristics of soil and environmental conditions to optimize the benefits of wastewater reuse
A simplified approach to optimize wave attenuation for floating energy islands: the role of flat plates
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Indagini archeologiche nel castello di Gioia Sannitica (Caserta): primi dati
No full texte ricerche archeologiche nel castello di Gioia Sannitica, in provincia di Caserta, nella regione Campania (fig. 1), sono state avviate nel mese di luglio 2023 dal team di archeologi medievisti del Dipartimento di Lettere e Beni Culturali dell’Università della Campania «Luigi Vanvitelli» in accordo con il Comune e la Soprintendenza archeologica2 per recuperare e valorizzare il sito. Il complesso fortificato, prima di allora, non era stato mai indagato sistematicamente dal punto di vista archeologico.3 Le indagini, attualmente in corso, sono condotte secondo la metodologia dell’archeologia cosiddetta «leggera», ossia senza attività invasive come lo scavo, basandosi principalmente sulla lettura stratigrafica muraria e sui dati di ricognizione
Electro-curing: Saving Energy for the Manufacturing of Structural Resins is Possible
No full textThe development of structural thermosetting composites is now widely exploited in the transport field, allowing for simultaneously having structural properties and mass reduction. Their applicability presents several advantages, including a lower temperature for processing the materials than other structural materials (i.e., metals). For the transport sector, weight saving allows reducing CO2 emissions and energy consumption during the in-service vehicles. Different research papers have highlighted that the manufacturing process is one of the most critical phases for the environmental impact of composite production. Currently, the primary process for producing epoxy composites (curing in an autoclave) is energy, time-consuming, and hardly tunable. Moreover, it often causes, during the curing cycle, gradients of temperatures in the components that may lead to the generation of microcracks or stress concentration. In light of these premises, the present research aims to present an energy-saving and highly tunable alternative process realized through electro-curing. The fluid epoxy resin is filled with carbonaceous electrically conductive nanofillers (multi-wall carbon nanotubes) to obtain a conductive mixture to be electrically cured via the Joule effect, obtaining a final product with a curing degree higher than the samples cured in an oven and requiring less than 10% of the energy compared to the autoclave process. Using the electro-curing process, the necessary energy for curing the samples is directly generated inside the resin via the Joule effect. Moreover, the electro-curing is highly and rapidly tunable since the energy generated in the sample is strictly related to the applied voltage and, so, the applied power. In the present research paper, a multi-step electro-curing process has been pursued and compared to samples cured in an oven. These results make electro-curing a promising method for producing thermosetting composites due to the substantial reduction of the environmental impact