44 research outputs found
Experimental and theoretical analysis of thermal solar collector systems for DHW in northern Italy
No full textSolar collectors performance evaluation has some established standards, represented by UNI 12976 and ISO 9806. Nevertheless, solar collectors are often installed as part of more complex Domestic Hot Water system (DHW). The aim of this work is to describe a methodology adopted for the experimental efficiency evaluation of Solar Collector systems for DHW production (SCDHW). In situ measurements of solar collector DHW system performance, including DHW storage and back-up heating system, have been compared with results from simulations performed using widely spread commercial software and f- chart method. In this paper ten SCDHW systems were analyzed. e. In situ measurements was carried out for at least 20 days for each plant, with sampling rate of ten minutes using ultra sound flow meter, and temperature probes. Almost all the plants had a previously installed heating power logger. Results show that generally the solar collector's area was exceeding actual DHW needing, resulting in measured lower efficiency (around 30%) than calculate by commercial software. Discrepancies between the measured and simulated data are probably due to unpredictable control system and end users behavior.Fil: Arboit, Mariela Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; Argentina. Università di Torino; ItaliaFil: Toniolo, J.. Università di Torino; ItaliaFil: Ghafoor, A.. Università di Torino; ItaliaFil: Fracastoro, G.V. Università di Torino; Itali
Structure of the Sibumasu-Indochina collision, central Thailand: a section through the Khao Khwang Fold and thrust belt
No full textAbstract not availableFrancesco Arboit, Alan S. Collins, Rosalind King, Christopher K. Morley, Rowan Hansberr
Palaeostress magnitudes in the Khao Khwang fold-thrust belt, new insights into the tectonic evolution of the Indosinian orogeny in central Thailand
No full textAbstract not availableFrancesco Arboit, Khalid Amrouch, Christopher Morley, Alan S.Collins, Rosalind Kin
Geochronological and geochemical studies of mafic and intermediate dykes from the Khao Khwang Fold–Thrust Belt: implications for petrogenesis and tectonic evolution
No full textAvailable online 20 May 2016Abstract not availableFrancesco Arboit, Alan S. Collins, Christopher K. Morley, Fred Jourdan, Rosalind King, John Foden, Khalid Amrouc
The geodynamic evolution of the Italian South Alpine basement from the Ediacaran to the Carboniferous: Was the South Alpine terrane part of the peri-Gondwana arc-forming terranes?
No full textZircon U-Pb LA-ICPMS ages were obtained from three metasedimentary and two metavolcanic samples from the Monte Cavallino (South Tyrol) and the Cima Vallona (Carnic Alps) tectono-metamorphic groups from the eastern South Alpine crystalline basement in NE Italy. These analyses were performed to constrain the maximum depositional ages of the South Alpine domain, and to compare the spatial and temporal provenance variations with those of adjacent terranes. The detrital zircon dataset from the metasedimentary rocks (416 grains) yield populations with age peaks at 2.7–2.9 Ga, 1.8–2.1 Ga, 1.2–0.85 Ga, and 0.65–0.45 Ga, with maximum depositional ages ranging from the latest Neoproterozoic to the Silurian. The metavolcanic zircon dataset (209 grains) documents the presence of a two Ordovician volcanic events in the South Alpine domain. The detrital zircon dataset implies that the clastic units of the South Alpine crystalline basement were (a) deposited on the peri-Gondwanan active continental margin and (b) were originally sourced from the Proterozoic and Paleozoic units of NW Gondwana and hence should no longer be considered as exotic elements. The age spectra of the three metasedimentary units highlight differences between the Ediacaran basement gneiss, the Ordovician greywacke, and the Silurian metaconglomerate, suggesting up-section age variations due to a temporal change in provenance. Collectively, these new detrital zircon U-Pb ages imply that the clastic units within the South Alpine domain recorded sedimentation at c. 550 Ma on the peri-Gondwanan active continental margin, followed by rift-related continental and marine sedimentation in a back-arc basin setting until at least the Silurian. The South Alpine domain ultimately rifted off from Gondwana due to back-arc spreading, and subsequently underwent Variscan metamorphism during accretion onto the Laurussia margin, which started at c. 380 Ma and lasted until at least c. 320 Ma
Analisi delle caratteristiche in risonanza magnetica di 12 casi di patologie intracraniche non neoplastiche con diagnosi istologica nel cane e confronto con la letteratura
No full textSebbene la risonanza magnetica (RM) permetta
di ottenere immagini delle strutture cerebrali
con un buon dettaglio anatomico e rappresenti
il gold standard per l’identificazione di patologie
del sistema nervoso centrale (SNC), non
esistono caratteristiche specifiche di imaging
che permettano di giungere ad una diagnosi definitiva
in assenza di un esame istologico. Con
lo scopo di analizzare le varie espressioni patologiche
in campo neuro-radiologico veterinario
sono stati presi in considerazione 12 cani con
patologie intracraniche non neoplastiche diagnosticate
istologicamente, con l’obiettivo di
descriverne le caratteristiche di RM e di confrontarle
con quanto riportato nella letteratura
di referenza internazionale pubblicata nel periodo
1995-2012
Analisi delle caratteristiche in risonanza magnetica di 35 neoplasie intracraniche del cane confermate istologicamente e confronto con la letteratura
No full textIn medicina veterinaria il ricorso alla diagnostica
per immagini mediante risonanza magnetica
(RM) sta conoscendo una sempre più ampia
diffusione; pertanto, nell’ottica di un miglioramento
delle possibilità diagnostiche, terapeutiche
e prognostiche, diviene necessità sempre
più impellente la standardizzazione dei reperti
di diagnostica per immagini in relazione alla
conferma istologica. In questo studio le caratteristiche
RM di 35 neoplasie intracraniche del
cane confermate istologicamente sono state
confrontate con quelle riportate nella letteratura
scientifica internazionale pubblicata tra il
1995 e il 2012. L’obiettivo principale di questo
confronto è quindi quello di ampliare le conoscenze
sulle possibili espressioni patologiche
delle neoplasie analizzate. La peculiare casistica
presentata rende possibile, inoltre, fornire
dati originali su alcuni tipi di patologie tumorali
poco frequenti e poco descritte in medicina
veterinari
Analisi delle caratteristiche in risonanza magnetica di 12 casi di patologie intracraniche non neoplastiche con diagnosi istologica nel cane e confronto con la letteratura.
No full textThe Transantral Endoscopic Approach: A Portal for Masses of the Inferior Orbit—Improving Surgeons' Experience Through Virtual Endoscopy and Augmented Reality
No full textIn the past years, endoscopic techniques have raised an increasing interest to perform minimally invasive accesses to the orbit, resulting in excellent clinical outcomes with inferior morbidities and complication rates. Among endoscopic approaches, the transantral endoscopic approach allows us to create a portal to the orbital floor, representing the most straightforward access to lesions located in the inferior orbital space. However, if endoscopic surgery provides enhanced magnified vision of the anatomy in a bloodless field, then it has several impairments compared with classic open surgery, owing to restricted operative spaces. Virtual surgical planning and anatomical computer-generated models have proved to be of great importance to plan endoscopic surgical approaches, and their role can be widened with the integration of surgical navigation, virtual endoscopy simulation, and augmented reality (AR). This study focuses on the strict conjugation between the technologies that allow the virtualization of surgery in an entirely digital environment, which can be transferred to the patient using intraoperative navigation or to a printed model using AR for pre-surgical analysis. Therefore, the interaction between different software packages and platforms offers a highly predictive preview of the surgical scenario, contributing to increasing orientation, awareness, and effectiveness of maneuvers performed under endoscopic guidance, which can be checked at any time using surgical navigation. In this paper, the authors explore the transantral approach for the excision of masses of the inferior orbital compartment through modern technology. The authors apply this technique for masses located in the inferior orbit and share their clinical results, describing why technological innovation, and, in particular, computer planning, virtual endoscopy, navigation, and AR can contribute to empowering minimally invasive orbital surgery, at the same time offering a valuable and indispensable tool for pre-surgical analysis and training
Optimizing efficiency in the creation of patient-specific plates through field-driven generative design in maxillofacial surgery
No full textAbstract Field driven design is a novel approach that allows to define through equations geometrical entities known as implicit bodies. This technology does not rely upon conventional geometry subunits, such as polygons or edges, rather it represents spatial shapes through mathematical functions within a geometrical field. The advantages in terms of computational speed and automation are conspicuous, and well acknowledged in engineering, especially for lattice structures. Moreover, field-driven design amplifies the possibilities for generative design, facilitating the creation of shapes generated by the software on the basis of user-defined constraints. Given such potential, this paper suggests the possibility to use the software nTopology, which is currently the only software for field-driven generative design, in the context of patient-specific implant creation for maxillofacial surgery. Clinical scenarios of applicability, including trauma and orthognathic surgery, are discussed, as well as the integration of this new technology with current workflows of virtual surgical planning. This paper represents the first application of field-driven design in maxillofacial surgery and, although its results are very preliminary as it is limited in considering only the distance field elaborated from specific points of reconstructed anatomy, it introduces the importance of this new technology for the future of personalized implant design in surgery
