Search results for "FD"
showing 10 items of 483 documents
Spectrum and energy efficient solutions for OFDMA collaborative wireless networks
2013
Externalidades de la inversión directa exterior sobre la actividad emprendedora local : un enfoque institucional en Latinoamérica
2013
Externalidades de la Inversión Directa Exterior sobre la actividad emprendedora local: Un enfoque institucional en Latinoamérica RESUMEN Cada vez es más prolífero el avance de la investigación académica de economistas y analistas políticos, sobre el papel que desempeñan las empresas multinacionales (MNE) en el desarrollo de las economías emergentes. Sin embargo, la contribución de los académicos en negocios internacionales en este sentido es algo escasa, especialmente considerando la importancia que su aporte puede significar en la materia. Surge entonces, el reto de profundizar y contribuir desde esa disciplina al debate actual, y el presente trabajo, propone abordarlo desde una perspectiv…
FLUMO: FLexible Underwater MOdem
2019
The last years have seen a growing interest in underwater acoustic communications because of its applications in marine research, oceanography, marine commercial operations, the offshore oil industry and defense. High-speed communication in the underwater acoustic channel has been challenging because of limited bandwidth, extended multipath, refractive properties of the medium, severe fading, rapid time variation and large Doppler shifts. In this paper, we show an implementation of a flexible Software-Defined Acoustic (SDA) underwater modem, where modulation parameters are completely tunable to optimize performance. In particular, we develop the system architecture following two key ideas. …
Approccio campistico per lo studio del fenomeno di ionizzazione del suolo mediante il metodo FDTD
2004
AN ANALYSIS ON THE FDI FLOWS FROM EMERGING ECONOMIES TO EUROPE AND THEIR IMPACT
2014
After a concise setting of the context (by emphasizing on the FDI flows dynamics at the beginning of the 21st century through the lens of: annual inward and outward FDI flows between 2001 and 2013; annual contribution to IFDI flows and, respectively, to OFDI flows by group of countries – developed versus developing and transition ones), the paper analyzes the emerging market economies and the dynamics of their FDI flows (by using contextualization and comparisons). The main aspects targeted are: the dynamics of the outward FDI flows from EMEs comparative to the dynamics of the global outward FDI flows on annual basis, and the evolution of the specific weight of OFDI flows from EMEs in globa…
Measurement of long-lived radionuclide activity induced in target components of a cyclotron used for [18F ]-[FDG] production
2019
The evaluation of high activity induced in target components in using a medical cyclotron to produce positron-emitting radionuclides for PET (Positron Emission Tomography) diagnostic studies is one of important issue and involves radiation protection concepts when operators are engaged in maintenance and/or substitution of a target or its components. Most of replaced target components are generally classified and stored in a Pb-shielded container in order to wait for their radioactive decay. However, after some years, it can be necessary to start with the removal of the oldest parts, for a temporary storage of the fresh activated ones. The feasibility of these operations and the waste final…
The determinants of FDI: a new network-based approach
2022
This article investigates the determinants of FDI at sub-national level. It recognizes that MNEsModified Letter Turned Comma foreign activities are organized in networks of strongly interconnected, but geographically dispersed affiliates. This implies a different approach to the analysis of the determinants of FDI, which should focus on contextual factors able to stimulate economic relations at distance. Methodologically, we use a gravity-type model and different regression techniques with a new dataset on networks of FDI involving German and Italian regions. We find evidence that technologically proximate regions sharing the same industry profile are more likely to experience positive and …
Green Composites Based on Mater-Bi® and Solanum lycopersicum Plant Waste for 3D Printing Applications
2023
3D printability of green composites is currently experiencing a boost in importance and interest, envisaging a way to valorise agricultural waste, in order to obtain affordable fillers for the preparation of biodegradable polymer-based composites with reduced cost and environmental impact, without undermining processability and mechanical performance. In this work, an innovative green composite was prepared by combining a starch-based biodegradable polymer (Mater-Bi®, MB) and a filler obtained from the lignocellulosic waste coming from Solanum lycopersicum (i.e., tomato plant) harvesting. Different processing parameters and different filler amounts were investigated, and the obtained sample…
CFD simulation of heavy pollutants in urban areas: the case study of Messina.
2008
Modelling of the hydrodynamics of concurrent gas and liquid flow through packed bed
2016
The aim of the present study is to simulate concurrent gas and liquid flow through packed bed in the gas continuous flow regime (GCF) and continuity shock waves regime (CSW) using computational fluid dynamics (CFD). The application of multiple gas-liquid-solid model requires the knowledge of relationships determining interactions between phases. The exchange coefficients of these forces were defined by means of equations suggested by ATTOU et al. (1999). As a result of the computational simulation the following data were obtained: gas pressure drop in the bed, volume fraction distribution of a given phase (liquid and gas holdups) along the packing and its mean value in the reactor. The comp…