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Search Results: 1 - 10 of 59 matches for " Manno "
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On the geometry of Grassmannian equivalent connections
Gianni Manno
Mathematics , 2006,
Abstract: We introduce the equation of n-dimensional totally geodesic submanifolds of a manifold E as a submanifold of the second order jet space of n-dimensional submanifolds of E. Next we study the geometry of n-Grassmannian equivalent connections, that is linear connections without torsion admitting the same equation of n-dimensional totally geodesic submanifolds. We define the n-Grassmannian structure as the equivalence class of such connections, recovering for n=1 the case of theory of projectively equivalent connections. By introducing the equation of parametrized n-dimensional totally geodesic submanifolds as a submanifold of the second order jet space of the trivial bundle on the space of parameters, we discover a relation of covering between the `parametrized' equation and the `unparametrized' one. After having studied symmetries of these equations, we discuss the case in which the space of parameters is equal to R^n.
The Dynamic-to-Static Conversion of Dynamic Fault Trees Using Stochastic Dependency Graphs and Stochastic Activity Networks  [PDF]
Gabriele Manno, Ferdinando Chiacchio, Francesco Pappalardo
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.52023
Abstract:

In this paper a new modeling framework for the dependability analysis of complex systems is presented and related to dynamic fault trees (DFTs). The methodology is based on a modular approach: two separate models are used to handle, the fault logic and the stochastic dependencies of the system. Thus, the fault schema, free of any dependency logic, can be easily evaluated, while the dependency schema allows the modeler to design new kind of non-trivial dependencies not easily caught by the traditional holistic methodologies. Moreover, the use of a dependency schema allows building a pure behavioral model that can be used for various kinds of dependability studies. In the paper is shown how to build and integrate the two modular models and convert them in a Stochastic Activity Network. Furthermore, based on the construction of the schema that embeds the stochastic dependencies, the procedure to convert DFTs into static fault trees is shown, allowing the resolution of DFTs in a very efficient way.

Looking for a Silver Lining: The Possible Positives of Declining Energy Return on Investment (EROI)
Jack P. Manno
Sustainability , 2011, DOI: 10.3390/su3112071
Abstract: Declining energy return on investment (EROI) of a society’s available energy sources can lead to both crisis and opportunity for positive social change. The implications of declining EROI for human wellbeing are complex and open to interpretation. There are many reasons why frugal living and an energy diet could be beneficial. A measure of wellbeing or welfare gained per unit of energy expended (WROEI) is proposed. A threshold is hypothesized for the relation between energy consumption and wellbeing. The paper offers a biophysical-based social science explanation for both the negative and positive possible implications of declining EROI. Two sets of future scenarios based on environmental and economic trends are described. Six types of social change activism are considered essential if the positives of declining EROI are to balance or exceed the negatives.
Neurohospitalists: Challenges for the Integration of a New Field: A Neurointensivist's Perspective
Edward M. Manno
Frontiers in Neurology , 2010, DOI: 10.3389/fneur.2010.00154
Abstract:
The geometry of finite order jets of submanifolds and the variational formalism
Gianni Manno,Raffaele Vitolo
Physics , 2003,
Abstract: We study the geometry of jets of submanifolds with special interest in the relationship with the calculus of variations. We give a new proof of the fact that higher order jets of submanifolds are affine bundles; as a by-product we obtain a new expression for the associated vector bundles. We use Green-Vinogradov formula to provide coordinate expressions for all variational forms, i.e., objects in the finite-order variational sequence on jets of submanifolds. Finally, we formulate the variational problem in the framework of jets of submanifolds by an intrinsic geometric language, and connect it with the variational sequence. Detailed comparison with literature is provided throughout the paper.
Geometric aspects of higher order variational principles on submanifolds
Gianni Manno,Raffaele Vitolo
Mathematics , 2006, DOI: 10.1007/s10440-008-9190-x
Abstract: The geometry of jets of submanifolds is studied, with special interest in the relationship with the calculus of variations. A new intrinsic geometric formulation of the variational problem on jets of submanifolds is given. Working examples are provided.
Meta-symplectic geometry of $3^\textrm{rd}$ order Monge-Ampère equations and their characteristics
Gianni Manno,Giovanni Moreno
Mathematics , 2014,
Abstract: This paper is a natural companion of [Alekseevsky et al.: Contact geometry of multidimensional Monge-Amp\`ere equations: characteristics, intermediate integrals and solutions. Ann. Inst. Fourier (Grenoble) (2012)], generalising its perspectives and results to the context of third-order (2D) Monge-Amp\`ere equations. We use the so-called "meta-symplectic structure" associated with the 8D prolongation $M^{(1)}$ of a 5D contact manifold $M$ and the corresponding notion Lagrangian planes. The analogy with standard symplectic structures allows to write down a geometric definition of a third-order Monge-Amp\`ere equation in terms of a (class of) differential two-form on $M^{(1)}$. In particular, the equations corresponding to decomposable forms admit a simple description in terms of Lagrangian planes which are non-transversal to a certain three-dimensional distribution. We show that such a distribution is made from the characteristics of the original equation, and that there can be up to three mutually orthogonal distributions determining the same equation. We conclude the paper with a study of the intermediate integrals of third-order Monge-Amp\`ere equations of Goursat type.
Memetic evolution of art to distinct aesthetics
Francis AM Manno III
Quantitative Biology , 2015,
Abstract: Humans have been using symbolic representation (i.e. art) as a creative cultural form indisputably for at least 80,000 years. A description of the processes central to the evolution of art from sculpted earthen forms early in human existence to paintings in museums of the modern world is absent in scholarly literature. The present manuscript offers a memetic theory of art evolution demonstrating typological transitions of art in the period post the 3-dimensional to 2-dimensional transition occurring in the early Aurignacian period. The process of art evolution in the 2-dimensional form central to the typological transitions post this period was propelled by material and/or structure chosen to display the artistic message. Symbolic representational tinkering whether collectively or individually creates artistic typologies of display deemed aesthetic and non-aesthetic by the current cultural milieu. Contemporary forms of graffiti underscore the aesthetic/nonaesthetic dichotomy.
On the symmetry structure of the minimal surface equation
A. V. Kiselev,G. Manno
Mathematics , 2004,
Abstract: An infinite sequence of commuting nonpolynomial contact symmetries of the two-dimensional minimal surface equation is constructed. Local and nonlocal conservation laws for $n$-dimensional minimal area surface equation are obtained by using the Noether identity.
Lung sealant and morbidity after pleural decortication: a prospective randomized, blinded study
Luca Bertolaccini, Paraskevas Lybéris, Emilpaolo Manno
Journal of Cardiothoracic Surgery , 2010, DOI: 10.1186/1749-8090-5-45
Abstract: From January 2008 to December 2008, 46 consecutive patients received pleural decortications for empyema thoracis. Post-procedural and malignancy-related empyemas were excluded. After hydro-pneumatic test and surgical correction of AL (until satisfaction), patients were assigned (23 per group) to Control or Sealant group. Control group underwent no additional interventions. In Sealant group, lung sealant was applied over AL areas. Following variables were measured daily: patients with AL; time to chest drainage (CD) removal; CD drainage volume at removal, postoperative length of hospital stay, postoperative C-reactive protein (CRP), and leukocyte counts. Personnel recording parameters were blinded to intervention. Two-tailed t-tests (normally distributed data) or Mann - Whitney U-test (not-normally distributed data) were used for evaluating significance of differences between group means or medians. Significance of any proportional differences in attributes were evaluated using Fisher's Exact Test. Statistical analysis was carried out using R-software (version 2.8.1).Groups were similar regarding demographic and baseline characteristics. No patients were withdrawn from study; no adverse effects were recorded. There were no significative differences on CRP and leukocyte levels between two groups. Compared with the Control group, in Sealant group significantly fewer patients had AL (30 versus 78%, p = 0.012), and drains were inserted for a shorter time (medians, 3 versus 5 days, p = 0.05). Postoperative hospitalization time was shorter in Sealant group than in control group, but difference was not significant (0.7 days, p = 0.121).Pleuraseal? Lung Sealant System significantly reduces AL following pleural decortications for empyema and, despite of not-increased infectious indexes, is suitable for routinely use, even in procedures with contaminated pleura.Prolonged parenchymal air leak is the most common complication after lung resection [1]. Prolonged air leak lead to p
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