Ecoturismo in Europa: metodologie per l\u2019eccellenza

L\u2019ecoturismo \ue8 un segmento che presenta forti potenzialit\ue0 per indirizzare l\u2019intero comparto turistico nella direzione della conservazione della natura, della Corporate Social Responsibility e dello sviluppo sostenibile. Per il raggiungimento di tale complessa sfida, \ue8 fondamentale che le organizzazioni impegnate nella filiera ecoturistica sviluppino un approccio sistemico riguardo l\u2019organizzazione, il management e il processo strategico. Per la valutazione dell\u2019efficacia di un sistema ecoturistico, \ue8 essenziale sviluppare una riflessione sulle varie metodologie per la ricognizione delle esperienze di successo

Service level agreement framework for differentiated survivability in GMPLS-based IP-over-optical networks

In the next generation optical internet, GMPLS based IP-over-optical networks, ISPs will be required to support a wide variety of applications each having their own requirements. These requirements are contracted by means of the SLA. This paper describes a recovery framework that may be included in the SLA contract between ISP and customers in order to provide the required level of survivability. A key concern with such a recovery framework is how to present the different survivability alternatives including recovery techniques, failure scenario and layered integration into a transparent manner for customers. In this paper, two issues are investigated. First, the performance of the recovery framework when applying a proposed mapping procedure as an admission control mechanism in the edge router considering a smart-edge simple-core GMPLS-based IP/WDM network is considered. The second issue pertains to the performance of a pre-allocated restoration and its ability to provide protected connections under different failure scenarios

Regarding “Understanding the ‘Scope’ of the Problem: Why Laparoscopy Is Considered Safe during the COVID-19 Pandemic”

SARS-CoV-2 range in size from 0.06 to 0.125 μm, falling squarely within the particle-size range that HEPA filters capture with extraordinary efficiency: 0.01 micron and above. It is incorrect to state that HEPA filters are not able to catch particles below 0.3 micron, like SARS-CoV-2 virus. This belief is based on a misunderstanding of how HEPA filters work. The particles size of 0.3 micron is used as a standard to measure the effectiveness of HEPA filters, but this does not mean they are not able to catch smaller particles. A paper from the NASA1 well explains that HEPA filters are highly effective in capturing a very high proportion, up to 100%, of nanoparticulate contaminants, ranging in size from 0.1 to 0.001 micron (diffusion regime) because they don’t fly straight, collide with other fast-moving molecules, move around in random pathways and hit the filter fibers remaining stuck in them. This is known as the Brownian movement. The intersecting regime has just a small drop in efficiency that affects the particles of around 0.3 μm, defined as most penetrating particle size (MPPS). This value for a typical HEPA filter varies from 0.2 to 0.3 micron, depending on flow rate, and lowering the flow speed, a simple HEPA will perform as an ULPA filter

Política, cultura y sociedad en la España de Franco (1939-1975), tomo II/2, Los intentos de las minorías dirigentes de modernizar el Estado tradicional español (1947-1956). [Reseña]

Reseña de: Gonzalo Redondo, Política, cultura y sociedad en la España de Franco (1939-1975), tomo II/2, Los intentos de las minorías dirigentes de modernizar el Estado tradicional español (1947-1956), eunsa, Pamplona 2009, 1.120 pp

L'Histoire religieuse en France et en Espagne, Colloque international (Casa de Velázquez, 2-5 avril 2001). [Reseña]

Reseña de: Benoît PELLISTRANDI (éd.), L'Histoire religieuse en France et en Espagne, Colloque international (Casa de Velázquez, 2-5 avril 2001), Casa de Velázquez, Madrid, 2004, 506 pp

Structural aspects of Hamilton–Jacobi theory

The final publication is available at Springer via http://dx.doi.org/10.1142/S0219887816500171In our previous papers [11, 13] we showed that the Hamilton–Jacobi problem can be regarded as a way to describe a given dynamics on a phase space manifold in terms of a family of dynamics on a lower-dimensional manifold. We also showed how constants of the motion help to solve the Hamilton–Jacobi equation. Here we want to delve into this interpretation by considering the most general case: a dynamical system on a manifold that is described in terms of a family of dynamics (‘slicing vector fields’) on lower-dimensional manifolds. We identify the relevant geometric structures that lead from this decomposition of the dynamics to the classical Hamilton– Jacobi theory, by considering special cases like fibred manifolds and Hamiltonian dynamics, in the symplectic framework and the Poisson one. We also show how a set of functions on a tangent bundle can determine a second-order dynamics for which they are constants of the motion.Peer ReviewedPostprint (author's final draft

Evaluation of Synapse Density in Hippocampal Rodent Brain Slices.

In the brain, synapses are specialized junctions between neurons, determining the strength and spread of neuronal signaling. The number of synapses is tightly regulated during development and neuronal maturation. Importantly, deficits in synapse number can lead to cognitive dysfunction. Therefore, the evaluation of synapse number is an integral part of neurobiology. However, as synapses are small and highly compact in the intact brain, the assessment of absolute number is challenging. This protocol describes a method to easily identify and evaluate synapses in hippocampal rodent slices using immunofluorescence microscopy. It includes a three-step procedure to evaluate synapses in high-quality confocal microscopy images by analyzing the co-localization of pre- and postsynaptic proteins in hippocampal slices. It also explains how the analysis is performed and gives representative examples from both excitatory and inhibitory synapses. This protocol provides a solid foundation for the analysis of synapses and can be applied to any research investigating the structure and function of the brain

Pointwise estimates for the Bergman kernel of the weighted Fock space

We prove upper pointwise estimates for the Bergman kernel of the weighted Fock space of entire functions in $L^2(e^{-2\phi})$ where $\phi$ is a subharmonic function with $\Delta \phi$ a doubling measure. We derive estimates for the canonical solution operator to the inhomogeneous Cauchy-Riemann equation and we characterize the compactness of this operator in terms of $\Delta \phi$