Search results for "passiv"
showing 10 items of 512 documents
Enabling Energy Savings in Offshore Mechatronic Systems by using Self-Contained Cylinders
2019
This paper proposes a novel actuation system for an offshore drilling application. It consists of three self-contained electro-hydraulic cylinders that can share and store regenerated energy. The energy saving potential of the proposed solution is analyzed through a multibody system simulation. The self-contained system demonstrates superior energy efficiency compared to the benchmark system representing the state-of-the-art approach used today (i.e., valve-controlled cylinders by means of pressure-compensated directional control valves and counter-balance valves, supplied by a centralized hydraulic power unit). Due to the power on demand capability, the cancellation of the throttling losse…
LA CASA EOLIANA: UN SISTEMA DI RAFFRESCAMENTO PASSIVO
2012
The Aeolian archipelago is a microcosm of traditional buildings that have retained their original character and form constructive. The special traditional technologies used and the climatic conditions of the site were also used for the application of a solution used in traditional passive systems with the aim of contributing to energy savings through the application of a particular covering of chestnut wood.
ANALYSIS OF THE TRADITIONAL PASSIVE SYSTEMS PERFORMANCE THROUGH THE APPLICATION OF CFD SOFTWARE
2012
The need to reduce energy consumption is pushing the building design research to the evaluation of passive conditioning systems, since urban buildings are one of the major energy dissipater resulting in emission of CO2. This approach is not modern, but it is historically rooted in the architectural culture of the Mediterranean area and in the Middle East. The passive systems have ancient origins: they were developed to mitigate the summer heat and the winter cold. To understand the reasons that led to the development of passive systems, it should be remembered that about One-Fifth of the emerged planet surface and One-Third of the world's population live in conditions of warm-dry or hot-hum…
Fracture and fatigue of titanium narrow dental implants: New trends in order to improve the mechanical response
2019
Sixty-four fractured commercially pure titanium (cp-Ti) narrow dental implants (NDIs) with similar macrogeometry and connection designs were studied after different implantation times in humans in order to determine their reliability and to evaluate the causes of the fracture. These NDIs were compared with other similar implants, made with alloyed titanium with 15% Zr and with 12% strained titanium. Original implants were tested under static and fatigue conditions, simulating the tri-axial loads in the mouth by means of a Bionix hydraulic test machine. Fractography was studied using field-emission scanning electron microscopy (FSEM). The results showed that cp-Ti NDI exhibits low strength f…
Il concetto di potestas nell'editto 'de noxalibus actionibus'. Per una ricostruzione della fase in iure del processo nossale classico
2017
Della fase in iure del processo nossale classico i testi raccolti nei titoli 2.9 e 9.4 dei Digesta Iustiniani, rubricati rispettivamente ‘Si ex noxali causa agatur, quemadmodum caveatur’ e ‘De noxalibus actionibus’, non ci tramandano una descrizione compiuta e lineare. L’abbozzo di una sintesi si può invero rinvenire in alcuni squarci della giurisprudenza severiana,1 ma non pochi passaggi restano nell’ombra, del tutto taciuti o non adeguatamente esplicitati. Spetta quindi all’interprete, come con i frammenti di un mosaico – un mosaico nella specie intricatissimo –, cercare di ordinare i vari ‘pezzi’, raccordarli logicamente fra loro e restituire, se possibile, un insieme coerente. Il compit…
Gli interessi passivi nella determinazione del reddito d'impresa
2016
Lo studio intende fornire un contributo alla ricostruzione sistematica della disciplina relativa alla deducibilità degli interessi passivi ai fini della determinazione del reddito di impresa. Dopo aver delineato il quadro dalla prospettiva economica e civilistica e aver tracciato l’iter storico ed evolutivo dei diversi istituti di diritto tributario coinvolti, la ricerca si concentra sull’individuazione degli interessi e degli “oneri a essi assimilati” quali componenti negativi del reddito di impresa ai fini dell’imposizione sui redditi. Vengono affrontate le principali questioni esegetiche e analizzati i molteplici profili che interessano i soggetti di imposta IRPEF e IRES, tenuto conto de…
TECHNOLOGICAL DESIGN. THE INNOVATION IN THE METHOD
2018
The book presents reflections on the centrality of Design in the discipline of Technology of Architecture and on the need to adapt the design method to the innovation of thought implemented by the research world. The theme of the Innovation in the Method of Technological Design is an interesting challenge that in this volume has been addressed considering the complexity of the levels of thematic depth, opening up to critical reflections, proposals for tools and illustration of case studies that show the breadth, relevance and multidimensionality of this issue. The era of digital and information technology have significantly influenced the way of doing and thinking in architecture and this e…
Acoustic wave guides as infinite-dimensional dynamical systems
2015
We prove the unique solvability, passivity/conservativity and some regularity results of two mathematical models for acoustic wave propagation in curved, variable diameter tubular structures of finite length. The first of the models is the generalised Webster's model that includes dissipation and curvature of the 1D waveguide. The second model is the scattering passive, boundary controlled wave equation on 3D waveguides. The two models are treated in an unified fashion so that the results on the wave equation reduce to the corresponding results of approximating Webster's model at the limit of vanishing waveguide intersection.
Effects of E-Cigarette Exposure on Prenatal Life and Childhood Respiratory Health: A Review of Current Evidence
2021
In the last decade, widespread use of E-cigarettes (EC) has occurred all over the world. Whereas, a large amount of evidence on harm to children from conventional cigarette exposure is available, data on health effects in this population throughout different vulnerability windows are still a matter of concern. Exposure to EC during pregnancy may compromise placental function, resulting in fetal structural abnormalities. Specifically, this may cause physio-pathologic changes in the developing lung, which in turn may impair respiratory health later in life. Furthermore, there is evidence that using EC can cause both short- and long-term respiratory problems in the pediatric population and the…