15 resultados para TRANSPORT COSTS

em Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco


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This paper reviews the methods for measuring the economic cost of conflict. Estimating the economic costs of conflict requires a counterfactual calculation, which makes this a very difficult task. Social researchers have resorted to different estimation methods depending on the particular effect in question. The method used in each case depends on the units being analyzed (firms, sectors, regions or countries), the outcome variable under study (aggregate output, market valuation of firms, market shares, etc.) and data availability (a single cross-section, time series or panel data). This paper reviews existing methods used in the literature to assess the economic impact of conflict: cost accounting, cross-section methods, time series methods, panel data methods, gravity models, event studies, natural experiments and comparative case studies. The paper ends with a discussion of cost estimates and directions for further research.

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Revised 2008-08.-- Published as an article in: Journal of Public Economic Theory (2008), 10(4), 563-594.

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[ES] La internacionalización de la producción de las factorías navales viene impulsada por las posibilidades que las nuevas técnicas de construcción abren a la desagregación de los procesos productivos. Además, los avances experimentados en las tecnologías de la información y comunicación reducen los inconvenientes de la deslocalización de actividades en distintos centros ubicados en áreas geográficas distantes. Asimismo, el abaratamiento de los costes de transporte resta importancia a los escollos del desplazamiento de las partes del buque entre los distintos puntos de construcción. Pese a ello, en el sector naval, cuyo mercado objetivo habitual es de ámbito mundial, la internacionalización de la producción resulta ser una práctica menos frecuente.

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[ES] La literatura existente señala el potencial de una gestión medioambiental proactiva en la generación de capacidades organizativas relativas a la minimización de costes. Además, durante los últimos años, la internalización de los costes medioambientales de la industria transportista ha sido un importante objetivo en el desarrollo de políticas públicas.

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[EN] The aims of this work were (i) to evaluate the potential of nanostructured lipid carriers (NLCs) as a tool to 24 enhance the oral bioavailability of poorly soluble compounds using saquinavir (SQV), a BCS class IV drug 25 and P-gp substrate as a model drug, and (ii) to study NLC transport mechanisms across the intestinal barrier. 26 Three different NLC formulations were evaluated. SQV transport across Caco-2 monolayers was enhanced up 27 to 3.5-fold by NLCs compared to SQV suspension. M cells did not enhance the transport of NLCs loaded with 28 SQV. The size and amount of surfactant in the NLCs influenced SQV's permeability, the transcytosis pathway 29 and the efflux of SQV by P-gp. An NLC of size 247 nm and 1.5% (w/v) surfactant content circumvented P-gp 30 efflux and used both caveolae- and clathrin-mediated transcytosis, in contrast to the other NLC formulations, 31 which used only caveolae-mediated transcytosis. By modifying critical physicochemical parameters of the 32 NLC formulation, we were thus able to overcome the P-gp drug efflux and alter the transcytosis mechanism 33 of the nanoparticles. These findings support the use of NLCs approaches for oral delivery of poorly 34 water-soluble P-gp substrates.

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30 p.

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35 p.

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170 p.

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Nucleophosmin (NPM) is a nucleocytoplasmic shuttling protein, normally enriched in nucleoli, that performs several activities related to cell growth. NPM mutations are characteristic of a subtype of acute myeloid leukemia (AML), where mutant NPM seems to play an oncogenic role. AML-associated NPM mutants exhibit altered subcellular traffic, being aberrantly located in the cytoplasm of leukoblasts. Exacerbated export of AML variants of NPM is mediated by the nuclear export receptor CRM1, and due, in part, to a mutationally acquired novel nuclear export signal (NES). To gain insight on the molecular basis of NPM transport in physiological and pathological conditions, we have evaluated the export efficiency of NPM in cells, and present new data indicating that, in normal conditions, wild type NPM is weakly exported by CRM1. On the other hand, we have found that AML-associated NPM mutants efficiently form complexes with CRM1HA (a mutant CRM1 with higher affinity for NESs), and we have quantitatively analyzed CRM1HA interaction with the NES motifs of these mutants, using fluorescence anisotropy and isothermal titration calorimetry. We have observed that the affinity of CRM1HA for these NESs is similar, which may help to explain the transport properties of the mutants. We also describe NPM recognition by the import machinery. Our combined cellular and biophysical studies shed further light on the determinants of NPM traffic, and how it is dramatically altered by AML-related mutations.

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[EU]Lan honetan hutsetik hasita skate motorizatu baten diseinu bat egin da, Industria Teknologian Ingeniaritzako Graduan eskuratutako jakintzak erabiliz. Skatea gazteengan oso erabilia den garraiobide bat da aisia dela-eta, eta sinpletasuna eta ekonomia kontuan hartuta, aisia eta ingurugiroarekiko konpromisoa nahasten dira diseinu honekin. Lanak bide argi bat dauka: hasieran merkatuaren egoera aztertzen da, gero diseinu posible batzuk proposatu ahal izateko, eta hortik aukera bat jorratu ahal izateko. Hortaz, prozesua hasieratik hasita, egitura hau izango du lanak: Hasteko, skate motorizatuen merkatuko egoera zein den aztertzen da, ondoren eta helburuak zeintzuk diren kontutan izanda, diseinu posible batzuk proposatu ahal izateko, alternatiben analisien atalean ageri direnak. Proposamen horiek aztertu egiten dira, alde on eta txarrak desberdinduz eta horietako soluzio bat aukeratuz. Aukeratutako diseinuaren CAD modelo bat eraikitzen da, ondoren egoera fisikoa matematikoki modelizatzeko eta beharrezko kalkuluak egin ahal izateko, metodologia atalean eta eranskinetan ageri direnak, hala nola, azelerazio jakin bat lortzeko behar den potentzia, transmisioan beharrezkoak diren kalkuluak kokatu beharreko elementuak zeintzuk diren erabaki ahal izateko, etab. Bide honetan, jorraturiko diseinuaz gain beste diseinu optimizatu eta konplexuago bat proposatzen da, ikerketa bidea zabalik duena, enpresa mundura gehiago zuzendua. Azkenik, lana burutzeko bete behar izan diren ataza bakoitzaren deskribapena eta iraupena, aurrekontua eta gastu aitorpena, arriskuen analisia eta proiektu honetatik atera ditugun ondorioak ematen dira.