Strongly regular multi-level solutions of singularly perturbed linear partial differential equations

We study the asymptotic behavior of the solutions related to a family of singularly perturbed partial differential equations in the complex domain. The analytic solutions are asymptotically represented by a formal power series in the perturbation parameter. The geometry of the problem and the nature of the elements involved in it give rise to different asymptotic levels related to the so-called strongly regular sequences. The result leans on a novel version of amulti-level Ramis-Sibuya theorem.Ministerio de Economía y Competitivida

Ab Initio Identification of Novel Regulatory Elements in the Genome of Trypanosoma brucei by Bayesian Inference on Sequence Segmentation

Background: The rapid increase in the availability of genome information has created considerable demand for both comparative and ab initio predictive bioinformatic analyses. The biology laid bare in the genomes of many organisms is often novel, presenting new challenges for bioinformatic interrogation. A paradigm for this is the collected genomes of the kinetoplastid parasites, a group which includes Trypanosoma brucei the causative agent of human African trypanosomiasis. These genomes, though outwardly simple in organisation and gene content, have historically challenged many theories for gene expression regulation in eukaryotes. Methodology/Principle Findings: Here we utilise a Bayesian approach to identify local changes in nucleotide composition in the genome of T. brucei. We show that there are several elements which are found at the starts and ends of multicopy gene arrays and that there are compositional elements that are common to all intergenic regions. We also show that there is a composition-inversion element that occurs at the position of the trans-splice site. Conclusions/Significance: The nature of the elements discovered reinforces the hypothesis that context dependant RN

Presupuestos generales para un estudio de las expresiones causales y consecutivas en español

Se exponen algunos conceptos clave de la teoría Desde el hablar a las lenguas, desde la cual se examinan los aspectos generales de las determinaciones causales, condicionales, concesivas y consecutivas del enunciado: la relación entre un causal y un causado, la sucesión temporal entre ellos y la naturaleza de los elementos de relación. Teniendo en cuenta estos aspectos, se procede a una primera clasificación sistemática de las causales (suficiente / no suficiente, alternativa / no alternativa) y de las consecutivas. Asimismo, se justifica la exclusión de las subordinadas finales y el importante papel que las presuposiciones desempeñan en algunos tipos de causales.In the present paper the authors set out the key concepts of the theory "From Speaking to Linguistic Systems," out of which the general aspects of cause, condition, concession and result determinations of the utterance are examined: the relationship between cause and result, the temporal succession between them and the nature of the elements of that relationship. After taking these aspects into consideration, a first systematic classification of cause (sufficient/non-sufficient, alternative/non-alternative) and result clauses is established. In similar fashion, the exclusion of purpose sentences is explained as well as the important role played by assumptions in some types of cause clauses

SPS-prepared targets for sputtering deposition of phase change films.

Phase-change materials like thin films from the systems [Ge1-xPbx]Te and Ge[Te1-xSex] are of interest for data storage. For these compositions amorphous materials can not be obtained by melt quenching. However, Suitable films can be obtained using RF sputtering. Spark plasma sintering (SPS) was used to densify the powders to obtain large targets. Synthesis conditions and characterisations of the targets are reported. Amorphous nano films were obtained using the sintered targets and characterised

Equitable opportunities in economic environments

In this paper, we extend the axiomatic analysis of equitable opportunities developed in Kranich [6] from finite to continuous opportunity sets. This extended framework is amenable to economic applications. The main results establish conditions under which an ordinal ranking of profiles of opportunity sets can be represented by a cardinal advantage function which describes both the extent of inequality and the distribution of advantage among the agents

Aspecte conceptuale si tehnice privind viitoare reglementari contabile pentru IMM-uri in Europa

The economic theories and the accounting regulations deriving from them should be reconsidered for SMEs. At global level, there are accomplishments in this respect – IASB IFRS for SMEs – or intentions – European Commission proposals for certain simplifications of the European directives. However, for these actions to be successful, further investigations concerning the theoretical and technical implications are necessary. In this study, we present our opinion concerning the theoretic influences (reconsideration of the conceptual framework) and the technical influences (change in the disclosure requirements and change in the content of the standards, namely recognition and valuation) implied by a standard for SMEs.SMEs accounting standard, agency theory, shareholder-manager, stakeholders, IFRS for SMEs

The distribution of oportunities: a normative theory

In this paper, we consider the problem of ranking protiles of opportunity sets. First, we take each agent's preferences over (individual) opportunity sets as given. Then, rather than discriminate among possibly competing evaluative criteria, we consider minimal standards for any such ranking. We impose four normative principies, in each case limiting the conditions under which ethical conclusions might be drawn to only those cases that are unambiguous. The first three principles are subrestrictions of the Pareto criterion; they require that Pareto improvements unambiguously enhance social welfare only when they do not conflict with other social objectives. The fourth principle is a minimal equity condition. It requires that if an agent can be identified as being the worst-off, then a necessary condition for social welfare to unambiguously increase when sorne agents gain is that this agent gains as well, however slightly. We then study the properties of social optima under these restrictions. We show that while optima need not be Pareto efficient, they must be envy-free. Thus, accepting these principies requires commitment to a world in which no agent envies the opportunities available to another

Geometric Phase and Quantum Phase Transition in the Lipkin-Meshkov-Glick model

The relation between the geometric phase and quantum phase transition has been discussed in the Lipkin-Meshkov-Glick model. Our calculation shows the ability of geometric phase of the ground state to mark quantum phase transition in this model. The possibility of the geometric phase or its derivatives as the universal order parameter of characterizing quantum phase transitions has been also discussed.Comment: 6 pages and to be published in Phys.Lett.