Search results for "Hub"
showing 10 items of 207 documents
The Forebrain of the Blind Cave Fish <i>Astyanax hubbsi </i>(Characidae)
1997
This paper presents a survey of the cell groups in the telencephalon of the teleost Astyanax hubbsi, based on series of transverse sections stained with the Nissl-, Kluver-Barrera and Bodian procedure
The Importance of Air Connectivity and the Impact on Romanian Airports
2019
In a world where passenger air travel is set to keep a positive growth rate over the years, airports all over the world are striving to increase their connectivity rate by attracting different airline companies, either for point to point connections or hub connectivity to wider the number of destinations reached from the airport to all over the world via a hub. From an airport perspective, creating a strategy to increase the connectivity performance index requires a lot of market analysis, following latest developments of hub connections from all over Europe, as hub connectivity tends to change on a yearly basis. Airport connectivity performance is directly linked to growth, studies (ACI Eu…
How build up soil bacterial co-occurrence networks from wide spatial scalesampling?
2019
National audience; Although land use drives soil bacterial diversity and community structure, littleinformation about the bacterial interaction networks is available. Here, we investigatedbacterial co-occurrence networks in soils under different types of land use (forests, grasslands,crops and vineyards) by sampling 1798 sites in the French Soil Quality Monitoring Networkcovering all of France. An increase in bacterial richness was observed from forests tovineyards, whereas network complexity respectively decreased from 16,430 links to 2,046.However, the ratio of positive to negative links within the bacterial networks ranged from 2.9 inforests to 5.5 in vineyards. Networks structure was ce…
The Hubris Hypothesis of Corporate Social Irresponsibility: Evidence from the Parmalat Case
2013
In the last decade, various accounting scandals have come about (such as Enron, Global Crossing, Tyco, Worldcom and Parmalat), stimulating the burgeoning debate on the drivers and conditions underlying the emergence of financial frauds.
A Matrix Model For An Energy Management System Based On Multi-Carrier Energy Hub Approach
2015
The INGRID FP7 European co-funded project studies several methodologies concerning hydrogen production and storage, aiming to provide services to electricity system operators for suitably balancing electrical supply and demand. In such a context, the problem of integrating different carriers into a single multi-hub optimiser represents a challenging topic for the research. This paper depicts the Energy Management System (EMS) of the plant which will be developed and built as a prototype of the INGRID system. The approach followed for the EMS design and development takes the cue from the matrix model presented in the rest of the paper, as well as the general optimisation problem formulation …
A sense of spacing: Toward a diffractive reading of organizational space
2022
This article explores how a diffractive methodology can enrich research on organizational space and the senses. Through the creation of interferences, a diffractive methodology directs attention to how differences in sensing are created in the ongoing production of space and what the effects of these are. By using examples from an ethnographic study of the Hub, a university-based entrepreneurship space designed to invoke positive “buzz”, the article illustrates how a diffractive methodology allows for the exploration of the sensory design of space and how it governs the possibilities of sensing among participants. The article contributes to organizational research by demonstrating how a di…
La hubris manageriale quale fonte della irresponsabilità d’impresa: uno studio esplorativo
2014
Obiettivo del paper: L’ondata di scandali etici che ha colpito intensamente il mondo delle imprese a partire dalla fine del XX secolo ha fatto emergere l’esigenza di esplorare i meccanismi istituzionali tesi a evitare nuovi casi di corporate social irresponsibility (CSI). S’intende contribuire a tale dibattito introducendo la trappola della hubris manageriale quale determinante della CSI. Metodologia: Esame qualitativo-longitudinale del caso Parmalat nel periodo in cui è stata sotto la guida del suo fondatore Calisto Tanzi (1961-2003). L’analisi del caso segue i criteri scientifici del campionamento teorico, della triangolazione dei fatti e della periodizzazione della narrazione. Risultati:…
Testing the Home Market Effects in a Multi-country World: The Theory
2004
We extend the two-country model by Krugman (1980) to a multi-country set-up and show that the `home-market effect' highlighted with two countries does not readily extend to such a more general setting. In particular, we prove that the most important result, namely the disproportionate causation from demand to supply, generalizes only under the fairly implausible assumption of pairwise symmetric trade costs between all countries. We argue, therefore, that the implications of product differentiation for the structure of world trade are better characterized in terms of spatial (`accessibility') and non-spatial (`attraction') effects, and we provide a theory-based specification that suggests ho…
Flat bands, Dirac cones, and atom dynamics in an optical lattice
2010
We study atoms trapped with a harmonic confinement in an optical lattice characterized by a flat band and Dirac cones. We show that such an optical lattice can be constructed which can be accurately described with the tight binding or Hubbard models. In the case of fermions the release of the harmonic confinement removes fast atoms occupying the Dirac cones while those occupying the flat band remain immobile. Using exact diagonalization and dynamics we demonstrate that a similar strong occupation of the flat band does not happen in bosonic case and furthermore that the mean field model is not capable for describing the dynamics of the boson cloud.
Quantum effects in one-dimensional optical flat-band lattices
2011
I numerically simulated one-dimensional lattice systems describable by the Hubbard-model and containing a flat-band. I studied the manner in which particles initially held in place by a parabolic confinement potential are dispersed across the lattice after the potential is removed. I also studied currents flowing within one-dimensional Hubbard-rings. In both of these cases I observed that the flat dispersion relation of the flat-band manifests itself as the immobility of the particles occupying it. Particles occupying flat-band states do not disperse even after the removal of any external confinement, neither do they contribute to a current within a ring.