Methodology for reengineering based on business process modeling

[EN] Methodologies to improve processes help to find ways to improve industrial activity, reducing ineffi ciencies and improving the value perceived by the customer. One of the most widely used improvement methodologies to improve processes is the Business Process Reengineering. Yet, despite its high diffusion, many organizations complain about the low returns they have achieved with it and many experts stress its risks or criticize. Other methodologies surveyed are unwieldy and have problems such as long periods of implementation, or the high effort, knowledge and training required for use. Therefore, the objective of this paper is to propose a methodology for process improvement simple and effective, by which is possible to identify areas of process improvement from its modeling. The result is an agile and effective methodology that consists of seven stages by which it is possible to identify both possible improvements in process and improvements that are not technically feasible. All this with low training requirements and low cost. The main contributions of the proposed methodology are, therefore, its simplicity, ease of use and communication, its graphic aspect and its fl exibility to adapt to different companies, sectors or types of processes[ES] Las metodologías para la mejora de procesos ayudan a encontrar formas de mejorar la actividad industrial, reduciendo ineficiencias y mejorando el valor percibido por el cliente. Una de las metodologías más utilizadas para la mejora de procesos es la Reingeniería de Procesos de Negocio, aunque, a pesar de su alta difusión, muchas organizaciones se quejan de la poca rentabilidad que han alcanzado con ella y muchos expertos subrayan sus riesgos o la critican. Otras metodologías consultadas son poco manejables y presentan problemas como: largos periodos de implementación o el elevado esfuerzo, conocimientos y formación requeridos para su utilización. Por ello, el objetivo del presente trabajo es proponer una metodología para la mejora de procesos sencilla y efectiva, mediante la cual se puedan identificar los aspectos de mejora de un proceso a partir de su modelado. El resultado obtenido es una metodología ágil y eficaz, que consta de siete fases mediante la cuales es posible identificar tanto posibles mejoras en el proceso como mejoras que no son viables técnicamente. Todo ello con bajos requerimientos de formación y con bajo coste. Las principales aportaciones de la metodología propuesta son, por tanto, su simplicidad, su facilidad de uso y de comunicación, su carácter gráfico y su flexibilidad para adaptarse a distintas empresas, sectores o tipos de procesos.El presente trabajo ha sido parcialmente desarrollado en el marco del Proyecto titulado “Métodos y modelos para la planificación de operaciones y gestión de pedidos en cadenas de suministro caracterizadas por la incertidumbre en la producción debido a la falta de homogeneidad en el producto”, subvencionado por el Ministerio Español de Economía y Competitividad (MICINN), con referencia DPI2011-23597 y por el Vicerrectorado de Investigación de la Universidad Politécnica de Valencia, con referencia PAID06-11/1840.Alarcón Valero, F.; Alemany Díaz, MDM.; Jeanpierre, F. (2012). Metodología para la reingeniería basada en el modelado de procesos de negocio. DYNA: Ingeniería e Industria. 87(5):566-573. https://doi.org/10.6036/4585S56657387

Study of Tau-pair Production in Photon-Photon Collisions at LEP and Limits on the Anomalous Electromagnetic Moments of the Tau Lepton

Tau-pair production in the process e+e- -> e+e-tau+tau- was studied using data collected by the DELPHI experiment at LEP2 during the years 1997 - 2000. The corresponding integrated luminosity is 650 pb^{-1}. The values of the cross-section obtained are found to be in agreement with QED predictions. Limits on the anomalous magnetic and electric dipole moments of the tau lepton are deduced.Comment: 20 pages, 9 figures, Accepted by Eur. Phys. J.

CP asymmetry in B→ϕKSB \to \phi K_S in a general two-Higgs-doublet model with fourth-generation quarks

We discuss the time-dependent CP asymmetry of decay $B \to \phi K_S$ in an extension of the Standard Model with both two Higgs doublets and additional fourth-generation quarks. We show that although the Standard Model with two-Higgs-doublet and the Standard model with fourth generation quarks alone are not likely to largely change the effective $\sin 2 \beta$ from the decay of $B \to \phi K_S$, the model with both additional Higgs doublet and fourth-generation quarks can easily account for the possible large negative value of $\sin 2 \beta$ without conflicting with other experimental constraints. In this model, additional large CP violating effects may arise from the flavor changing Yukawa interactions between neutral Higgs bosons and the heavy fourth generation down type quark, which can modify the QCD penguin contributions. With the constraints obtained from $b \to s \bar{s} s$ processes such as $B \to X_s \gamma$ and $\Delta m_{B_s^0}$, this model can lead to the effective $\sin 2 \beta$ to be as large as $- 0.4$ in the CP asymmetry of $B \to \phi K_S$.Comment: 13 pages, 5 figures, references added, to appear in Eur.Phys.J.

Energy dependence of Cronin momentum in saturation model for p+Ap+A and A+AA+A collisions

We calculate $\sqrt{s}$ dependence of Cronin momentum for $p+A$ and $A+A$ collisions in saturation model. We show that this dependence is consistent with expectation from formula which was obtained using simple dimentional consideration. This can be used to test validity of saturation model (and distinguish among its variants) and measure $x$ dependence of saturation momentum from experimental data.Comment: LaTeX2e, 12 pages, 8 figure

Search for composite and exotic fermions at LEP 2

A search for unstable heavy fermions with the DELPHI detector at LEP is reported. Sequential and non-canonical leptons, as well as excited leptons and quarks, are considered. The data analysed correspond to an integrated luminosity of about 48 pb^{-1} at an e^+e^- centre-of-mass energy of 183 GeV and about 20 pb^{-1} equally shared between the centre-of-mass energies of 172 GeV and 161 GeV. The search for pair-produced new leptons establishes 95% confidence level mass limits in the region between 70 GeV/c^2 and 90 GeV/c^2, depending on the channel. The search for singly produced excited leptons and quarks establishes upper limits on the ratio of the coupling of the excited fermio

Search for lightest neutralino and stau pair production in light gravitino scenarios with stau NLSP

Promptly decaying lightest neutralinos and long-lived staus are searched for in the context of light gravitino scenarios. It is assumed that the stau is the next to lightest supersymmetric particle (NLSP) and that the lightest neutralino is the next to NLSP (NNLSP). Data collected with the Delphi detector at centre-of-mass energies from 161 to 183 \GeV are analysed. No evidence of the production of these particles is found. Hence, lower mass limits for both kinds of particles are set at 95% C.L.. The mass of gaugino-like neutralinos is found to be greater than 71.5 GeV/c^2. In the search for long-lived stau, masses less than 70.0 to 77.5 \GeVcc are excluded for gravitino masses from 10 to 150 \eVcc . Combining this search with the searches for stable heavy leptons and Minimal Supersymmetric Standard Model staus a lower limit of 68.5 \GeVcc may be set for the stau mas

Identification of a delta5-like fatty acyl desaturase from the cephalopod Octopus vulgaris (Cuvier 1797) involved in the biosynthesis of essential fatty acids

Long-chain polyunsaturated fatty acids (LC-PUFA) have been identified as essential compounds for common octopus (Octopus vulgaris), but precise dietary requirements have not been determined due in part to the inherent difficulties of performing feeding trials on paralarvae. Our objective is to establish the essential fatty acid (EFA) requirements for paralarval stages of the common octopus through characterisation of the enzymes of endogenous LC-PUFA biosynthetic pathways. In this study we isolated a cDNA with high homology to fatty acyl desaturases (Fad). Functional characterisation in recombinant yeast showed the octopus Fad exhibited ∆5 desaturation activity towards saturated and polyunsaturated fatty acyl substrates. Thus, it efficiently converted the yeast’s endogenous 16:0 and 18:0 to 16:1n-11 and 18:1n-13, respectively, and desaturated exogenously added PUFA substrates, 20:4n-3 and 20:3n-6, to 20:5n-3 (EPA) and 20:4n-6 (ARA), respectively. Although the ∆5 Fad enables common octopus to produce EPA and ARA, the low availability of its adequate substrates 20:4n-3 and 20:3n-6, either in the diet or by limited endogenous synthesis from C18 PUFA, might indicate that EPA and ARA are indeed EFA for this species. Interestingly, the octopus ∆5 Fad can also participate in the biosynthesis of non-methylene interrupted FA, PUFA that are generally uncommon in vertebrates but that have been found previously in marine invertebrates including molluscs, and now also confirmed to be present in specific tissues of common octopus

Measurement of the Tau Lepton Polarisation at LEP2

A first measurement of the average polarisation P_tau of tau leptons produced in e+e- annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. The measured value P_tau = -0.164 +/- 0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV.A first measurement of the average polarisation Pτ of tau leptons produced in e + e − annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. The measured value Pτ=−0.164±0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV.A first measurement of the average polarisation P_tau of tau leptons produced in e+e- annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. The measured value P_tau = -0.164 +/- 0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV

Papers impresos. Núm. 1

Núm. 1 (feb. 1984)Editorial / Albert Ràfols Casamada. Sobre pintura / Albert Ràfols Casamada. Els nous espais públics a Barcelona / Josep C. Bagà. Pensar la posguerra / Eugenio Trias. Elogio de la utopía / Norberto Chaves. Metro i ferrocarrils de la Generalitat / Frederic Solé. Lectures corrents de literatura angles / Marta Pessarrodona. La decoració / Pep Alemany. Manifest / Toni Miserachs