991 resultados para external R


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Implantació ERP SAP R/3 a una organització del sector químic.

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Projecte d'implantació del sistema SAP R/3 que inclou les fases d'anàlisi i de disseny funcional.

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L'objectiu d'aquest TFC és la realització d'un estudi del projecte sobre la implantació d'un sistema de gestió integrat ERP (Enterprise Resource Planning) a una empresa fictícia del sector cerveser CePe (Cerveses Penedès) d'acord amb els objectius estratègics de l'empresa.

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Projecte d'implantació d'un sistema de gestió ERP SAP R/3.

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Background: The variety of DNA microarray formats and datasets presently available offers an unprecedented opportunity to perform insightful comparisons of heterogeneous data. Cross-species studies, in particular, have the power of identifying conserved, functionally important molecular processes. Validation of discoveries can now often be performed in readily available public data which frequently requires cross-platform studies.Cross-platform and cross-species analyses require matching probes on different microarray formats. This can be achieved using the information in microarray annotations and additional molecular biology databases, such as orthology databases. Although annotations and other biological information are stored using modern database models ( e. g. relational), they are very often distributed and shared as tables in text files, i.e. flat file databases. This common flat database format thus provides a simple and robust solution to flexibly integrate various sources of information and a basis for the combined analysis of heterogeneous gene expression profiles.Results: We provide annotationTools, a Bioconductor-compliant R package to annotate microarray experiments and integrate heterogeneous gene expression profiles using annotation and other molecular biology information available as flat file databases. First, annotationTools contains a specialized set of functions for mining this widely used database format in a systematic manner. It thus offers a straightforward solution for annotating microarray experiments. Second, building on these basic functions and relying on the combination of information from several databases, it provides tools to easily perform cross-species analyses of gene expression data.Here, we present two example applications of annotationTools that are of direct relevance for the analysis of heterogeneous gene expression profiles, namely a cross-platform mapping of probes and a cross-species mapping of orthologous probes using different orthology databases. We also show how to perform an explorative comparison of disease-related transcriptional changes in human patients and in a genetic mouse model.Conclusion: The R package annotationTools provides a simple solution to handle microarray annotation and orthology tables, as well as other flat molecular biology databases. Thereby, it allows easy integration and analysis of heterogeneous microarray experiments across different technological platforms or species.

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L’actual document és el resultat final d’un treball engegat l’any 2009 per la comunitat de pràctica dels Psicòlegs dels equips d’assessorament tècnic penal arran de la implementació progressiva del programa Compartim, de gestió del coneixement al Departament de Justícia. És en aquest marc de treball col·laboratiu que els psicòlegs dels equips d’assessorament tècnic penal vam decidir que el contingut del producte de coneixement a elaborar havia de centrar-se en una tasca en què tots i totes ens hi sentíssim vinculats i motivats perquè respongués a una necessitat tècnica important: l’anàlisi de la credibilitat dels testimonis en violència de gènere atesa l’increment demanda per part dels òrgans judicials sobre el testimoni en violència de gènere, des de la creació l’any 2004 del Jutjat de Violència vers la Dona. Així és en aquest camp en què decidim, l’any 2009, fer un pas endavant i analitzar en profunditat les tècniques que hi ha actualment sobre l’anàlisi de la credibilitat del testimoni adult en violència de gènere per tal de valorar la seva possible eficàcia i la seva posterior administració mitjançant la revisió de la Guia d’avaluació del testimoni en violència de gènere, instrument de Juárez, J.R., Mateu, A. i Sala, E. el 2007 (publicat pel CEJFE, Departament de Justícia, 2007). Ja el novembre de 2010 publicàvem un primer estudi on es presentaven unes primeres conclusions fetes arran de la revisió de la Guia d’avaluació del testimoni en violència de gènere esmentada. Després d’aquests 3 anys, a hores d’ara ja estem en disposició de poder presentar els resultats d’un treball que, independentment dels seus resultats, de la seva futura aplicació i de la seves possibles repercussions en l’àmbit de la justícia, volem remarcar que és fruit d’un treball conjunt, col·laboratiu i cooperatiu, fruit del debat, de l’intercanvi de coneixements, de la reflexió i de l’optimització tècnica de professionals especialitzats en l’àmbit com són el conjunt dels psicòlegs dels equips d’assessorament tècnic penal de Catalunya. Així en aquest espai s’ha aconseguit el que ja s’havia iniciat a l’anterior estudi: convertir el coneixement implícit en explícit, l’informal en formal, de privat a públic, en definitiva socialitzar i compartir el coneixement dels membres individuals de la comunitat per tal de poder dotar la nostra organització d’un patrimoni intel·lectual col·lectiu de més qualitat i, finalment, poder donar un millor servei públic des de la globalitat del territori. D’aquesta manera, i en la mateixa línia de treball, des de la publicació de l’anterior estudi (novembre 2010) i fins ara, es va continuar amb l’ampliació de la mostra incrementat aquesta de 31 a 83 casos cosa que ja ens permet amb més seguretat dibuixar un perfil sociodemogràfic, psicològic i del testimoni en casos de violència de gènere sobre els quals els òrgans judicials demanen pericials psicològiques de la denunciant.

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Over thirty years ago, Leamer (1983) - among many others - expressed doubts about the quality and usefulness of empirical analyses for the economic profession by stating that "hardly anyone takes data analyses seriously. Or perhaps more accurately, hardly anyone takes anyone else's data analyses seriously" (p.37). Improvements in data quality, more robust estimation methods and the evolution of better research designs seem to make that assertion no longer justifiable (see Angrist and Pischke (2010) for a recent response to Leamer's essay). The economic profes- sion and policy makers alike often rely on empirical evidence as a means to investigate policy relevant questions. The approach of using scientifically rigorous and systematic evidence to identify policies and programs that are capable of improving policy-relevant outcomes is known under the increasingly popular notion of evidence-based policy. Evidence-based economic policy often relies on randomized or quasi-natural experiments in order to identify causal effects of policies. These can require relatively strong assumptions or raise concerns of external validity. In the context of this thesis, potential concerns are for example endogeneity of policy reforms with respect to the business cycle in the first chapter, the trade-off between precision and bias in the regression-discontinuity setting in chapter 2 or non-representativeness of the sample due to self-selection in chapter 3. While the identification strategies are very useful to gain insights into the causal effects of specific policy questions, transforming the evidence into concrete policy conclusions can be challenging. Policy develop- ment should therefore rely on the systematic evidence of a whole body of research on a specific policy question rather than on a single analysis. In this sense, this thesis cannot and should not be viewed as a comprehensive analysis of specific policy issues but rather as a first step towards a better understanding of certain aspects of a policy question. The thesis applies new and innovative identification strategies to policy-relevant and topical questions in the fields of labor economics and behavioral environmental economics. Each chapter relies on a different identification strategy. In the first chapter, we employ a difference- in-differences approach to exploit the quasi-experimental change in the entitlement of the max- imum unemployment benefit duration to identify the medium-run effects of reduced benefit durations on post-unemployment outcomes. Shortening benefit duration carries a double- dividend: It generates fiscal benefits without deteriorating the quality of job-matches. On the contrary, shortened benefit durations improve medium-run earnings and employment possibly through containing the negative effects of skill depreciation or stigmatization. While the first chapter provides only indirect evidence on the underlying behavioral channels, in the second chapter I develop a novel approach that allows to learn about the relative impor- tance of the two key margins of job search - reservation wage choice and search effort. In the framework of a standard non-stationary job search model, I show how the exit rate from un- employment can be decomposed in a way that is informative on reservation wage movements over the unemployment spell. The empirical analysis relies on a sharp discontinuity in unem- ployment benefit entitlement, which can be exploited in a regression-discontinuity approach to identify the effects of extended benefit durations on unemployment and survivor functions. I find evidence that calls for an important role of reservation wage choices for job search be- havior. This can have direct implications for the optimal design of unemployment insurance policies. The third chapter - while thematically detached from the other chapters - addresses one of the major policy challenges of the 21st century: climate change and resource consumption. Many governments have recently put energy efficiency on top of their agendas. While pricing instru- ments aimed at regulating the energy demand have often been found to be short-lived and difficult to enforce politically, the focus of energy conservation programs has shifted towards behavioral approaches - such as provision of information or social norm feedback. The third chapter describes a randomized controlled field experiment in which we discuss the effective- ness of different types of feedback on residential electricity consumption. We find that detailed and real-time feedback caused persistent electricity reductions on the order of 3 to 5 % of daily electricity consumption. Also social norm information can generate substantial electricity sav- ings when designed appropriately. The findings suggest that behavioral approaches constitute effective and relatively cheap way of improving residential energy-efficiency.

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BACKGROUND: Antipyresis is a common clinical practice in intensive care, although it is unknown if fever is harmful, beneficial, or a negligible adverse effect of infection and inflammation. METHODS: In a randomized study, rectal temperature and discomfort were assessed in 38 surgical intensive care unit patients without neurotrauma or severe hypoxemia and with fever (temperature >/=38.5 degrees C) and systemic inflammatory response syndrome. Eighteen patients received external cooling while 20 received no antipyretic treatment. RESULTS: Temperature and discomfort decreased similarly in both groups after 24 hours. No significant differences in recurrence of fever, incidence of infection, antibiotic therapy, intensive care unit and hospital length of stay, or mortality were noted between the groups. CONCLUSIONS: These results suggest that the systematic suppression of fever may not be useful in patients without severe cranial trauma or significant hypoxemia. Letting fever take its natural course does not seem to harm patients with systemic inflammatory response syndrome or influence the discomfort level and may save costs.