MODELO BIDIMENSIONAL DE RIESGOS DEL MANTENIMIENTO DE SISTEMAS INTEGRADOS DE GESTIÓN (ERP)

La adopción y expansión de las Tecnologías de la Información y la Comunicación en el ámbito empresarial se está produciendo a gran velocidad. De la mano de las más innovadoras TIC y de los sistemas informáticos, surgen y se desarrollan los sistemas ERP. Éstos han sido implantados por empresas de todo el mundo. Tras su implantación, comienza su mantenimiento. Para que el resultado de estos proyectos sea satisfactorio, los riesgos que lo afectan tienen que ser gestionados. Una pobre gestión de estos riesgos, con frecuencia origina fallos en el sistema, lo que hace que las compañías tengan que asumir altas pérdidas. Para gestionar adecuadamente los riesgos, los profesionales deben comenzar identificándolos y clasificándolos. Para apoyar su labor, hemos realizado un estudio formal de los riesgos que afectan al mantenimiento de ERPs. La investigación finaliza con la elaboración de un Modelo de dos dimensiones compuesto por los riesgos identificados en la literatura

The effect of pressure on statics, dynamics and stability of multielectron bubbles

The effect of pressure and negative pressure on the modes of oscillation of a multi-electron bubble in liquid helium is calculated. Already at low pressures of the order of 10-100 mbar, these effects are found to significantly modify the frequencies of oscillation of the bubble. Stabilization of the bubble is shown to occur in the presence of a small negative pressure, which expands the bubble radius. Above a threshold negative pressure, the bubble is unstable.Comment: 4 pages, 2 figures, accepted for publication in Physical Review Letter

Faktor-faktor yang Berhubungan dengan Status Gizi Buruk pada Balita di Kota Semarang Tahun 2017 (Studi di Rumah Pemulihan Gizi Banyumanik Kota Semarang)

Severe acute malnutrition is a condition where nutritional deficiencies are seen based on nutritional status that is below the average standard determined based on the anthropometric indicator of body weight by height (WHZ)) with z-score <-3 SD and presence or absence of edema. The purpose of this study is to determine the factors associated with malnutrition status in under five child in Nutrition House of Semarang City. The type of research used is descriptive analytic quantitative research with cross sectional method. Population in this research is all mother and child who undergo recovery at Home Nutrition by sampling technique using total sampling technique that is 20. Anthropometric measurements were performed to calculate z-scores, filling out questionnaires, food recalls and food and non-family food expenditure forms. After doing the research, it is known that child suffering from severe acute malnutrition based on indicator WHZ is as many 11 people (55%). The results showed that variables associated with nutrition status were energy consumption level (p = 0,002), protein consumption (p = 0,04), and infectious disease (p = 0,000). While the variables associated with the level of energy and protein consumption is maternal nutrition knowledge and family economic status variables (p = 0.001)

Vortices on a superconducting nanoshell: phase diagram and dynamics

In superconductors, the search for special vortex states such as giant vortices focuses on laterally confined or nanopatterned thin superconducting films, disks, rings, or polygons. We examine the possibility to realize giant vortex states and states with non-uniform vorticity on a superconducting spherical nanoshell, due to the interplay of the topology and the applied magnetic field. We derive the phase diagram and identify where, as a function of the applied magnetic field, the shell thickness and the shell radius, these different vortex phases occur. Moreover, the curved geometry allows these states (or a vortex lattice) to coexist with a Meissner state, on the same curved film. We have examined the dynamics of the decay of giant vortices or states with non-uniform vorticity into a vortex lattice, when the magnetic field is adapted so that a phase boundary is crossed.Comment: 21 pages, 9 figure

Variational Monte Carlo study of the ground state properties and vacancy formation energy of solid para-H2 using a shadow wave function

A Shadow Wave Function (SWF) is employed along with Variational Monte Carlo techniques to describe the ground state properties of solid molecular para-hydrogen. The study has been extended to densities below the equilibrium value, to obtain a parameterization of the SWF useful for the description of inhomogeneous phases. We also present an estimate of the vacancy formation energy as a function of the density, and discuss the importance of relaxation effects near the vacant site

Evaluation of the visibility distance with the Istram program on third-class roads with a high accident rate

In Peru there are many roads where accidents occur due to their inadequate geometric design. The traffic accidents with the most incidents are of the side collision or collision type with a percentage of 42.73%, and distraction with 20.19% [1]. This shows that it is necessary to carry out a redesign on this road that seeks to reduce the percentage of accidents in the area. For the case study, a section of a 3km highway located in Santiago de Chuco, north of the city of Lima, was used. Thanks to the photogrammetric record of the current state of the road, sectors with geometric deficiencies were identified, such as visibility distance and safety in terms of precariousness in the use of signaling. Likewise, the evaluation carried out in the stopping and overtaking visibility distance concludes that with a constant speed of 30 km/h there are stretchs or sections that do not meet the necessary distance for its route.Academia Mexicana de Ciencia

Sonoluminescence and collapse dynamics of multielectron bubbles in helium

Multielectron bubbles (MEBs) differ from gas-filled bubbles in that it is the Coulomb repulsion of a nanometer thin layer of electrons that forces the bubble open rather than the pressure of an enclosed gas. We analyze the implosion of MEBs subjected to a pressure step, and find that despite the difference in the underlying processes the collapse dynamics is similar to that of gas-filled bubbles. When the MEB collapses, the electrons inside it undergo strong accelerations, leading to the emission of radiation. This type of sonoluminescence does not involve heating and ionisation of any gas inside the bubble. We investigate the conditions necessary to obtain sonoluminescence from multielectron bubbles and calculate the power spectrum of the emitted radiation.Comment: 6 figure

Limits to Sympathetic Evaporative Cooling of a Two-Component Fermi Gas

We find a limit cycle in a quasi-equilibrium model of evaporative cooling of a two-component fermion gas. The existence of such a limit cycle represents an obstruction to reaching the quantum ground state evaporatively. We show that evaporatively the \beta\mu ~ 1. We speculate that one may be able to cool an atomic fermi gas further by photoassociating dimers near the bottom of the fermi sea.Comment: Submitted to Phys. Rev