Satellite techniques for determining the geopotential for sea-surface elevations

Spaceborne altimetry with measurement accuracies of a few centimeters which has the potential to determine sea surface elevations necessary to compute accurate three-dimensonal geostrophic currents from traditional hydrographic observation is discussed. The limitation in this approach is the uncertainties in knowledge of the global and ocean geopotentials which produce satellite and height uncertainties about an order of magnitude larger than the goal of about 10 cm. The quantative effects of geopotential uncertainties on processing altimetry data are described. Potential near term improvements, not requiring additional spacecraft, are discussed. Even though there is substantial improvements at the longer wavelengths, the oceanographic goal will be achieved. The geopotential research mission (GRM) is described which should produce goepotential models that are capable of defining the ocean geid to 10 cm and near-Earth satellite position. The state of the art and the potential of spaceborne gravimetry is described as an alternative approach to improve our knowledge of the geopotential

The xix_i-eigenvalue problem on some new fuzzy spheres

We study the eigenvalue equation for the 'Cartesian coordinates' observables $x_i$ on the fully $O(2)$-covariant fuzzy circle $\{S^1_\Lambda\}_{\Lambda\in\mathbb{N}}$ ($i=1,2$) and on the fully $O(3)$-covariant fuzzy 2-sphere $\{S^2_\Lambda\}_{\Lambda\in\mathbb{N}}$ ($i=1,2,3$) introduced in [G. Fiore, F. Pisacane, J. Geom. Phys. 132 (2018), 423-451]. We show that the spectrum and eigenvectors of $x_i$ fulfill a number of properties which are expected for $x_i$ to approximate well the corresponding coordinate operator of a quantum particle forced to stay on the unit sphere.Comment: 28 pages. Version 3: some misprints are correcte

New fuzzy spheres through confining potentials and energy cutoffs

We briefly report our recent construction of new fuzzy spheres of dimensions d=1,2 covariant under the full orthogonal group O(D), D=d+1. They are built by imposing a suitable energy cutoff on a quantum particle in D dimensions subject to a confining potential well V(r) with a very sharp minimum on the sphere of radius r=1; furthermore, the cutoff and the depth of the well depend on (and diverge with) a natural number L. The commutator of the coordinates depends only on the angular momentum, as in Snyder noncommutative spaces. When L diverges, the Hilbert space dimension diverges, too; S^d_L converges to S^d, and we recover ordinary quantum mechanics on S^d. These models might be useful in quantum field theory, quantum gravity or condensed matter physics.Comment: Latex file, 13 pages, 2 figures. Contribution to the proceedings of the Corfu Summer Institute "School and Workshops on Elementary Particle Physics and Gravity", 2-28 September 2017, Corfu, Greece. Version 3: some misprints in the published version are correcte

Fuzzy circle and new fuzzy sphere through confining potentials and energy cutoffs

Guided by ordinary quantum mechanics we introduce new fuzzy spheres of dimensions d=1,2: we consider an ordinary quantum particle in D=d+1 dimensions subject to a rotation invariant potential well V(r) with a very sharp minimum on a sphere of unit radius. Imposing a sufficiently low energy cutoff to `freeze' the radial excitations makes only a finite-dimensional Hilbert subspace accessible and on it the coordinates noncommutative \`a la Snyder; in fact, on it they generate the whole algebra of observables. The construction is equivariant not only under rotations - as Madore's fuzzy sphere -, but under the full orthogonal group O(D). Making the cutoff and the depth of the well dependent on (and diverging with) a natural number L, and keeping the leading terms in 1/L, we obtain a sequence S^d_L of fuzzy spheres converging (in a suitable sense) to the sphere S^d as L diverges (whereby we recover ordinary quantum mechanics on S^d). These models may be useful in condensed matter problems where particles are confined on a sphere by an (at least approximately) rotation-invariant potential, beside being suggestive of analogous mechanisms in quantum field theory or quantum gravity.Comment: Latex file, 43 pages, 2 figures. We have added references and made other minor improvements. To appear in J. Geom. Phy

Meeting Mode Effects On Quality And Effectiveness With Clients And Sales Teams Utilizing Consumer Idealized Design

This dissertation examined the meeting mode effects on quality and effectiveness with clients and sales teams utilizing a systems approach called Consumer Idealized Design. A mixed method of research model was deployed with qualitative Consumer Idealized Design meetings between two groups, a sales team consisting of 20 people and clients consisting of 19 people. Quantitative data analysis showed that the clients perceived higher meeting quality and effectiveness when meeting virtually versus face-to-face. The sales team perceived higher meeting quality when meeting face-to-face but increased effectiveness when the meeting was done virtually. When applying a system method utilizing the Consumer Idealized Design process to design the ideal meeting mode, both the sales teams and client teams designed a hybrid meeting model that included face-to-face and virtual meetings as the most effective and highest quality meeting mode. Theoretical and practical implications of the research are discussed

Attitude stabilization of spacecraft with geomagnetic rate damping

Attitude stabilization of spacecraft with geomagnetic rate dampin

Teenagers, archaeology and the Higher Education Field Academy 2005–11

The University of Cambridge Higher Education Field Academy (HEFA) (www.access.arch.cam. ac.uk/schools/hefa) involves teenagers in new archaeological excavations within English rural settlements. While the research aim is to reconstruct the development of today’s villages, hamlets and small towns, the social aim is to raise the educational aspirations of state-educated 13–15-year-olds and instil skills which will help them fulfil those ambitions. HEFA began in 2005, when it was funded by Aimhigher, itself set up in 2003 to increase the number of young people from lower socioeconomic groups and disadvantaged backgrounds attending university. HEFA was supported by English Heritage between 2009 and 2011. HEFA’s track record since 2005 has enabled it to weather policy U-turns and deep funding cuts, deliveringmore than 12,000 learning days to c 4,000 young people interested in subjects ranging from accountancy to zoology. Rigorous monitoring shows that more than 90% of HEFA participants rate it good or excellent and that after completing HEFA, 80% feel more positive about post-16 education, 85% have developed new skills and more than 90% plan to attend university, a rise of 25-60%

Re-design an Open Space Through the Urban Farming

To intervene on urban development, with the aim of finding an alternative model that has emerged in the last century, a sustainable approach is necessary so as to establish the territory as a pattern in which it is not possible to detect the boundaries between the natural and artificial environments and in which each process is controlled so that its impact and, consequently, the irreversible degradation induced is the minimum possible in relation to the constraints of the process itself. The urban context should be seen as an organism with a dynamic balance achieved through the technological control of complex functions. With the aim of achieving these objectives, the role of open urban spaces is particularly important, since they constitute nodal elements capable of performing the delicate function of linking the urban systems with the surrounding natural ones, while assuming a strategic role in the transformation of anthropized areas. In this context urban farming can make a valuable contribution as an effective instrument for the renewal of urban open space because offers significant possibilities from an environmental, economic and social perspective (Franchino, 2015).The drawing of a territory offers a contribution into the phases of a local context analysis and architectural design communication. In the specific field of urban farming and about the project introduced in this abstract,the study of the area has been the preparatory analysis phase for the knowledge of the local resources,founding premise of a proper planning process. The analysis of the agricultural vocation of the area emerged also through the map comparative study, both diachronic and synchronic. This study, simultaneous to the study of urban farming models, has allowed the development of the project idea. The representation and communication of the project took place through different methods and tools. The articulation of the interior and open spaces occurred through plan and front views, the communication of the project is rather occurred through render views that illustrated both changes through day and night views, but also the landscape modifies through the evolution and the alternations of crops over the seasons.In order to obtain an applicative definition of these concepts, is presented a structured case study related to the requalification of a degraded urban area in the South of Italy