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Search Results: 1 - 10 of 177414 matches for " Federico De Olivera "
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Computing Greeks for Lévy Models: The Fourier Transform Approach
Federico De Olivera,Ernesto Mordecki
Quantitative Finance , 2014,
Abstract: The computation of Greeks for exponential L\'evy models are usually approached by Malliavin Calculus and other methods, as the Likelihood Ratio and the finite difference method. In this paper we obtain exact formulas for Greeks of European options based on the Lewis formula for the option value. Therefore, it is possible to obtain accurate approximations using Fast Fourier Transform. We will present an exhaustive development of Greeks for Call options. The error is shown for all Greeks in the Black-Scholes model, where Greeks can be exactly computed. Other models used in the literature are compared, such as the Merton and Variance Gamma models. The presented formulas can reach desired accuracy because our approach generates error only by approximation of the integral.
The Principles behind a Strategic Plan  [PDF]
Federico De Andreis
Open Journal of Applied Sciences (OJAppS) , 2019, DOI: 10.4236/ojapps.2019.94020
Abstract: This strategic planning has changed dramatically between the 1960’s and 1970’s. Having survived its original design flaws, it has evolved into a practical system of strategic management. Planning systems, in fact, have become more sophisticated in their selection of planning approach and techniques. The approach to the strategic plan should involve different methods and techniques, more complete and more sensitive to the critical uncertainty of many of the variables that planning must address. This change represents a recognition of the basis of a strategic plan that are able to determinate its success. Implementing this strategic approach, focused on method and technique, can play a variety of important and useful roles peripheral to the strategy development and implementation process.
A Critical Approach to the Tourism Management  [PDF]
Federico De Andreis, Massimiliano Carioni
Open Journal of Applied Sciences (OJAppS) , 2019, DOI: 10.4236/ojapps.2019.95027
Abstract: Tourist destination and, generally, tourist activities not only represent an extraordinarily important economic factor, but also an instrument of knowledge and personal empowerment. Therefore, we can state that it is essential to ensure access to the tourism experience to all citizens, regardless of personal, social, economic conditions and any other nature which may limit the fruition of this asset. The role of tourism management is to develop effective strategic plan in order to guarantee a possible growth of a destination, without having a negative impact on the resources, either natural or civilian of the destination itself. Tourist destinations follow a life-cycle (evolution cycle) based on a price factor (a greater attractiveness of an area means a greater willingness to pay of the tourists) and a trend factor (related to the fame of the area and to the evolution of tourists’ tastes and habits). These factors mark the tourism in the contents and in the methods of production and consumption, related to the concepts of supply and demand, two dimensions that must be always connected with the principles of growth, accessibility and sustainability. This research paper aims to deepen the life-cycle approach of a tourist destination, underlining the option that the tourism management could offer to relaunch an area, however considering the principle of supportable growing.
Risk Management Instruments, Strategies and Impacts in the Complex Organizations  [PDF]
Federico De Andreis, Marco Florio
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.95078
Even they don’t realize it; all types of organizations are probably employing some kind of risk management. Over time, procedures are developed to make sure that things don’t go wrong and plans are putting in place to reduce organizational impact if they do. This article examines the relevance, in the complex organizations, of risk management. After having defined the risk, through the use of case studies, this research will seek to define the instruments of risk analysis in complex organizations, showing the reason why the risk management should be considered as a priority, regardless of the magnitude of the negative outcomes.
Tratamiento. Helmintos
Claudineide Nascimento Fernandes de Olivera
Biomédica , 2011,
The Iberian Peninsula: Territorial Homogeneity and Europe's Periphery
Federico Brotas de Carvalho
UNISCI Discussion Papers , 2008,
Abstract: The Portuguese have a strong and established external certainty of their independence. This clarity of vision is obviously not present when looking inwards at understanding and conceptualising their own internal borders. Apart from that, an administrative, or even political, integration between Portugal and Spain would be clearly advantageous in terms of rationalisation of resources and immediate productivity on a global level. However, it would seriously harm the interests of the Portuguese, and is far from being debated in the Peninsula.
Oxidative Stress and HPV Carcinogenesis
Federico De Marco
Viruses , 2013, DOI: 10.3390/v5020708
Abstract: Extensive experimental work has conclusively demonstrated that infection with certain types of human papillomaviruses, the so-called high-risk human papillomavirus (HR-HPV), represent a most powerful human carcinogen. However, neoplastic growth is a rare and inappropriate outcome in the natural history of HPV, and a number of other events have to concur in order to induce the viral infection into the (very rare) neoplastic transformation. From this perspective, a number of putative viral, host, and environmental co-factors have been proposed as potential candidates. Among them oxidative stress (OS) is an interesting candidate, yet comparatively underexplored. OS is a constant threat to aerobic organisms being generated during mitochondrial oxidative phosphorylation, as well as during inflammation, infections, ionizing irradiation, UV exposure, mechanical and chemical stresses. Epithelial tissues, the elective target for HPV infection, are heavily exposed to all named sources of OS. Two different types of cooperative mechanisms are presumed to occur between OS and HPV: I) The OS genotoxic activity and the HPV-induced genomic instability concur independently to the generation of the molecular damage necessary for the emergence of neoplastic clones. This first mode is merely a particular form of co-carcinogenesis; and II) OS specifically interacts with one or more molecular stages of neoplastic initiation and/or progression induced by the HPV infection. This manuscript was designed to summarize available data on this latter hypothesis. Experimental data and indirect evidences on promoting the activity of OS in viral infection and viral integration will be reviewed. The anti-apoptotic and pro-angiogenetic role of NO (nitric oxide) and iNOS (inducible nitric oxide synthase) will be discussed together with the OS/HPV cooperation in inducing cancer metabolism adaptation. Unexplored/underexplored aspects of the OS interplay with the HPV-driven carcinogenesis will be highlighted. The aim of this paper is to stimulate new areas of study and innovative approaches.
Antimicrobial resistance in Gram negative bacteria isolated from intensive care units of Colombian hospitals, WHONET 2003, 2004 and 2005 Resistencia a antimicrobianos de bacilos Gram negativos aislados en unidades de cuidado intensivo en hospitales de Colombia, WHONET 2003, 2004 y 2005
María Consuelo Miranda,Federico Pérez,Tania Zuluaga,María del Rosario Olivera
Biomédica , 2011,
Abstract: Introduction. Surveillance systems play a key role in the detection and control of bacterial resistance. It is necessary to constantly collect information from all institutions because the mechanisms of bacterial resistance can operate in different ways between countries, cities and even in hospitals in the same area. Therefore local information is important in order to learn about bacterial behaviour and design appropriate interventions for each institution. Between January 2003 and December 2004, the Centro Internacional de Entrenamiento e Investigaciones Médicas (CIDEIM) developed a surveillance project in 10 tertiary hospitals in 6 cities of Colombia. Objectives. Describe the trends of antibiotic resistance among the isolates of Escherichia coli, Klebsiella pneumoniae, Pseudomona aeruginosa, Acinetobacter baumannii and Enterobacter cloacae, five of the most prevalent nosocomial Gram negative pathogens. Materials and Methods: The susceptibility tests were performed by automated methods in 9 hospitals and by Kirby Bauer in 1 hospital. Antibiotics with known activity against Gram negatives, according to the Clinical Laboratory Standards Institute guidelines, were selected. The laboratories performed internal and external quality controls. During the study period, the information was downloaded monthly from the databases of each microbiology laboratory and sent to CIDEIM where it was centralized in a database using the system WHONET 5.3. Results. The high resistance rates reported especially for A. baumannii, evidenced the presence of multidrug resistant bacteria in both ICUs and wards at every studied institution. Conclusions. The creation of a national surveillance network to improve our capabilities to detect, follow up, and control the antibiotic resistance in Colombia is urgently needed. Introducción. Los sistemas de vigilancia son una pieza clave para la detección y control de la resistencia bacteriana. Es indispensable recolectar constantemente la información de cada institución por la variabilidad existente entre países, ciudades y hospitales frente a los mecanismos de resistencia bacteriana y así plantear intervenciones apropiadas para cada institución. De enero 2003 a diciembre de 2005, el Centro Internacional de Entrenamiento e Investigaciones Médicas (CIDEIM) desarrolló un proyecto de vigilancia en un grupo de 10 hospitales de tercer nivel, en seis ciudades de Colombia. Objetivos. Presentar el comportamiento de Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Acinetobacter baumannii y Enterobacter cloacae, considerados los Gra
Single-inclusive jet production in polarized pp collisions at RHIC to next-to-leading logarithmic accuracy
Daniel de Florian,Federico Wagner
Physics , 2010, DOI: 10.1140/epjc/s10052-010-1286-6
Abstract: We perform the resummation of large logarithmic corrections to the partonic cross sections for single-inclusive jet production in polarized pp collisions. We reach the next-to-leading logarithmic accuracy for this observable with the corresponding matching to the next-to-leading order calculation performed in the small-cone approximation. We present numerical results for the BNL-RHIC collider at \sqrt{S}=200 GeV and 500 GeV. We find an enhancement of the spin-dependent cross section, specially at high transverse momentum for the jet, resulting in a rather small increase of the double-spin asymmetry A_LL for this process.
Theoretical Observations on Power in Complex Organizations  [PDF]
Federico de Andreis, Massimiliano Carioni
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.96093
Power is the ability to make things happen according to one’s perspective by getting someone else to do something. In organizations, there are various sources of power. However, the primary source of power is the legitimate power, which means the power assigned based on job designation. Organizations are made up of individuals that exercise greater or lesser degrees of power. Sometimes, authority stems from a person’s title in the organization, or from specialized knowledge and expertise. Others may exercise power through interpersonal relationships or the force of their personality. And still, others gain influence through an ability to grant access to important resources. This research will examine the structure of complex organizations with a focus on power management and power relations that can be created within the organizations themselves. It presents some observations of how the distribution and exercise of power in complex organizations varies systematically as a function of environment, organizational form, and personal characteristics of organizational members. This analysis, therefore, will define the power strategies, in order to understand the basis of the power, deepening how the power could be managed by leaders.
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