Search results for "Technology"
showing 10 items of 30343 documents
Nanotechnology for Conservation: The Case of Archaeological Sites
2006
L'articolo espone le principali problematiche conservative dei siti archeologici e analizza la possibilità di applicazione dei nuovi nanomateriali, derivanti dalle nanotecnologie come soluzioni innovative per affrontare problematiche irrisolte con i prodotti tradizionali. The article presents the main conservation problems of archaeological sites and analyzes the possibility of new nanomaterials application, deriving from nanotechnologies as innovative solutions to address unresolved problems with traditional products.
A New Simple Function for Combustion and Cyclic Variation Modeling in Supercharged Spark Ignition Engines
2022
Research in the field of Internal Combustion (IC) engines focuses on the drastic reduction of both pollutant and greenhouse gas emissions. A promising alternative to gasoline and diesel fuel is represented by the use of gaseous fuels, above all green hydrogen but also Natural Gas (NG). In previous works, the authors investigated the performance, efficiency, and emissions of a supercharged Spark Ignition (SI) engine fueled with mixtures of gasoline and natural gas; a detailed research involving the combustion process of this kind of fuel mixture has been previously performed and a lot of experimental data have been collected. Combustion modeling is a fundamental tool in the design and optimi…
Some aspects of quality and risk management in natural gas measurement
2019
The paper refers to some general aspects regarding the natural gas measurement. In this paper, we try to find methods for checking the quality and risks for gas meters. It is trying to find answers to the question of how we could design and operate a gas meter so that the measurement is as accurate as possible. A process has been proposed to identify, analyze and control the emerging risks. The desirable quality of the measuring instrument requires a rigorous analysis of all aspects that could adversely affect. It also shows the interdependence between quality and risk, one can not exist without the other. Based on these principles, the following papers propose the approach of case studies …
In Silico Analysis of Microarray-Based Gene Expression Profiles Predicts Tumor Cell Response to Withanolides
2012
Withania somnifera (L.) Dunal (Indian ginseng, winter cherry, Solanaceae) is widely used in traditional medicine. Roots are either chewed or used to prepare beverages (aqueous decocts). The major secondary metabolites of Withania somnifera are the withanolides, which are C-28-steroidal lactone triterpenoids. Withania somnifera extracts exert chemopreventive and anticancer activities in vitro and in vivo. The aims of the present in silico study were, firstly, to investigate whether tumor cells develop cross-resistance between standard anticancer drugs and withanolides and, secondly, to elucidate the molecular determinants of sensitivity and resistance of tumor cells towards withanolides. Usi…
Machine Learning Models for Measuring Syntax Complexity of English Text
2019
In this paper we propose a methodology to assess the syntax complexity of a sentence representing it as sequence of parts-of-speech and comparing Recurrent Neural Networks and Support Vector Machine. We have carried out experiments in English language which are compared with previous results obtained for the Italian one.
Rola i znaczenie nauk humanistycznych i społecznych w programach studiów na kierunkach technicznych
2016
Przemiany cywilizacyjne drugiej połowy XX wieku, które dalej są kontynuowane w XXI wieku,wywołały istotne zmiany w standardzie życia naszego społeczeństwa. Współczesne społeczeństwo zostało „przesiąknięte” techniką. Obecnie na rynku pracy poszukiwani są dobrze wykształceni specjaliści, którzy umiejętnie potrafią łączyć często odległe od siebie dziedziny nauki. Dziś już nie wystarczy wąskoprofilowe wykształcenie. Dlatego też w programach kształcenia studentów kierunków technicznych obok wiedzy ogólnej z przedmiotów ścisłych oraz wiedzy z zakresu kształcenia inżynierskiego są przedmioty z zakresu nauk humanistycznych i społecznych. To dzięki temu można wykształcić „wrażliwego człowieka”, któr…
A Navigation and Augmented Reality System for Visually Impaired People
2021
In recent years, we have assisted with an impressive advance in augmented reality systems and computer vision algorithms, based on image processing and artificial intelligence. Thanks to these technologies, mainstream smartphones are able to estimate their own motion in 3D space with high accuracy. In this paper, we exploit such technologies to support the autonomous mobility of people with visual disabilities, identifying pre-defined virtual paths and providing context information, reducing the distance between the digital and real worlds. In particular, we present ARIANNA+, an extension of ARIANNA, a system explicitly designed for visually impaired people for indoor and outdoor localizati…
Towards a typology of negative engagement behavior in social media
2022
Extant literature on consumer engagement has focused on positive manifestations of the construct, rather than on its negative dimension. Yet, many brand interactions are negative in nature. The purpose of this conceptual study is to develop a typology of negative engagement behavior in social media by using the multi-grounded theory (MGT) approach on a sample of 12,429 tweets extracted from Twitter. The analysis shows that negative engagement behavior with a brand or service provider as the object focus or target can be categorized according to (a) the manifestation of the negative engagement and (b) the emotional intensity of the negative engagement. Four categories of negative engagement …
Blends of Semiflexible Polymers: Interplay of Nematic Order and Phase Separation
2021
Mixtures of semiflexible polymers with a mismatch in either their persistence lengths or their contour lengths are studied by Density Functional Theory and Molecular Dynamics simulation. Considering lyotropic solutions under good solvent conditions, the mole fraction and pressure is systematically varied for several cases of bending stiffness κ (the normalized persistence length) and chain length N. For binary mixtures with different chain length (i.e., NA=16, NB=32 or 64) but the same stiffness, isotropic-nematic phase coexistence is studied. For mixtures with the same chain length (N=32) and large stiffness disparity (κB/κA=4.9 to 8), both isotropic-nematic and nematic-nematic unmixing oc…
Technical and economical comparison between NdFeB and hard ferrites linear electrical generators from sea waves
2015
In this paper the authors perform a technical-economic comparison of two different Tubular Permanent Magnet Linear Machines for sea waves generation by using finite elements analysis. The first configuration includes ferrite rings while the second configuration includes neodymium-iron-boron rings. In order to compare the two types in economic and technical terms, a detailed analysis of the main figures of merit of the two configurations has been carried out. In particular, significant data such as flux distribution, rated voltage and current, axial force, electric power, realization cost and maintenance cost have been compared.