Influence of initial power stabilization over PV modules maximum power

Measurements that suppliers offer in flash lists, unfortunately do not always fit the actual power measured in independent laboratories like CIEMAT. In fact, independent measurements usually appear lower than those printed in the label and sometimes a value beyond the allowed tolerance pointed by the manufacturer in the same label. In addition, a valuable power reduction has been reported when Standard IEC - EN 50380 is applied (according to this, PV module must be exposed to sunlight more than 20kWh/m2 previously to performing the measurement), crystalline PV modules usually decrease its power around 1%, but descends greater than 4 % have also been reported. These power losses are only detected after the mentioned power stabilization

From the Manifest Motive to the Real Demand of the Patient in the Psychological Consultation [Del motivo manifiesto a la demanda real del paciente en la consulta psicológica]

AbtractSometimes it is confusing to determine why you go to a psychological consultation; for the interviewer, it is extremely important to be clear about the manifest and latent motives, as well as the expectations of treatment with a psychoanalytic approach. It is a qualitative study, with a descriptive-explanatory design, which includes the analysis of semi-structured interviews. Twenty medical records of patients who attended the Centers for Psychological Intervention (CISP) in the state of Zacatecas, Mexico; in order to identify the manifest motive and latent motives, as well as treatment expectations and disease awareness. A relationship between these will be established, and their relevance of knowing them will be demonstrated so that later it can be used in an effective therapeutic process.ResumenEn ocasiones resulta confuso determinar por qué se acude a una consulta psicológica; para el entrevistador es de suma relevancia tener claros los motivos manifiestos y la­tentes, así como las expectativas del tratamiento con orien­tación psicoanalítica. Se trata de un estudio cualitativo, de diseño descriptivo-explicativo, el cual incluye el análisis de entrevistas semi-estructuradas. Se analizaron 20 histo­rias clínicas de pacientes que acudieron a los Centros de Intervención Psicológica (CISP) en el estado de Zacatecas, México; con la finalidad de identificar el motivo mani­fiesto y los motivos latentes, así como las expectativas del tratamiento y la conciencia de enfermedad. Se establecerá una relación entre estos, y se demostrará su relevancia de conocer los mismos para que posteriormente se consiga emplear en un proceso terapéutico efica

Balance de líquidos - vapor para mezcla de metanol - benzen usando los modelos Peng Robinson y Van- Laar

This paper is related to the procedure for calculating curves dew point and bubble point of a binary system, consisting of the methanol and benzene mixture to 45°C, using the Peng-Robinson cubic equation to calculate the fugacity coefficient of gas i in the mixture, and Van Laar model to calculate the activity coefficient of component i in the liquid mixture. Then a comparison between the theoretical data with the experimental data and later with the commercial simulator Hysys-Aspen, which applies the model of Wilson. The simulation was validated with experimental data,in addition to comparing the results with a commercial simulator.El  presente  artículo  está  relacionado  con  el  procedimiento  para  obtener  las  curvas  de  punto  de  rocío  y  de  punto  de  burbuja  en  un  equilibrio  líquido  -  vapor  (VLE)  para  una  mezcla  binaria  con  azeótropo  de  Metanol  y  Benceno  a  45°C,  utilizando  la  ecuación  cúbica  de  Peng Robinson para calcular el coeficiente de fugacidad del gas i en la mezcla gaseosa, y el modelo de Van Laar para calcular el coeficiente de actividad del componente i en la mezcla líquida.  Luego  se  compararon  los  datos  teóricos  con  datos  experimentales,  posteriormente con   el   simulador   comercial,   el   cual   aplica   el   modelo   de   Wilson,   se   logró   validar   los   datos  experimentales,  además  de  comparar  los  resultados  con  un  simulador  comercial

Model-Driven Development of a Web Service-Oriented Architecture and Security Policies.

Applying model-driven development methodologies provide inherent benefits such as increased productivity, greater reuse, and better maintainability, to name a few. Efforts on achieving model-driven development of web services already exist. However, there is currently no complete solution that addresses non-functional aspects of these services as well. This paper presents an ongoing work which seeks to integrate these non-functional aspects in the development of web services, with a clear emphasis on security

Evaluating non-functional properties globally

Real-time systems are usually dependable systems which, besides timing constraints, have to meet some other quality criteria in order to provide certain reliance on its operation. For this reason, a key issue in the development of this kind of system is to trade off the different non-functional aspects involved in the system e.g., time, performance, safety, power, or memory. The success of the development process is often determined by how earlier we can make thorough assumptions and estimations, and hence, take careful decisions about non-functional aspects. Our approach to support this decision activity is based on treating non-functional properties and requirements uniformly, and still supporting specific evaluation and analysi

Multi Domain-Specific Modeling of the Security Concerns of Service-Oriented Architectures

Service-Oriented Architectures (SOA), and Web Services (WS), the technology generally used to implement them, achieve the integration of heterogeneous technologies, providing interoperability, and yielding the reutilization of pre-existent systems. Model-driven development methodologies provide inherent benefits such as increased productivity, greater reuse, and better maintainability, to name a few. Efforts on achieving model-driven development of SOAs already exist, but there is currently no standard solution that addresses non-functional aspects of these services as well. This paper presents an approach to integrate these non-functional aspects in the development of web services, with an emphasis on security

Integration of Safety Analysis in Model-Driven Software Development

I Safety critical software requires integrating verification techniques in software development methods. Software architectures must guarantee that developed systems will meet safety requirements and safety analyses are frequently used in the assessment. Safety engineers and software architects must reach a common understanding on an optimal architecture from both perspectives. Currently both groups of engineers apply different modelling techniques and languages: safety analysis models and software modelling languages. The solutions proposed seek to integrate both domains coupling the languages of each domain. It constitutes a sound example of the use of language engineering to improve efficiency in a software-related domain. A model-driven development approach and the use of a platform-independent language are used to bridge the gap between safety analyses (failure mode effects and criticality analysis and fault tree analysis) and software development languages (e.g. unified modelling language). Language abstract syntaxes (metamodels), profiles, language mappings (model transformations) and language refinements, support the direct application of safety analysis to software architectures for the verification of safety requirements. Model consistency and the possibility of automation are found among the benefits

Analysis of Quality Dependencies in the Composition of Software Architectures

A dependable system has to meet some quality criteria in order to provide certain reliance on its operation. The quality of a system depends on the complex composition of the quality of its subsystems. Specications of non-functional properties are commonly used to describe provided quality, required quality, resource usage and resource availability. Enclosing these specifications along with architectural models allows performing preliminary quality assessments (design-phase analysis). We allow configuration choices for quality specifications to represent design choices, deployment choices, or component adaptability. We focus on a composition study that answers to: is it possible to meet system and subsystem requirements given provided qualities? and, which configuration allows satisfying the requirements? The contributions of this work are: i) to formalize the composition based on quality levels and constraints, ii) to analyze existing quality dependencies in such a composition, iii) to show how we represent and evaluate dependencies in a model driven environment

Las interacciones educativas de padres con hijos con deficiencias auditivas. Una revisión desde la perspectiva del estatus auditivo de los padres

En el presente artículo se realiza una revisión de las características de las interacciones educativas de padres con hijos con defi ciencias auditivas. Para ello, se distingue entre las familias en las que los padres son oyentes de aquéllas en las que los padres también padecen pérdidas de audición. El análisis de las peculiaridades de las interacciones educativas en ambos tipos de familias arroja diferencias notables, principalmente relacionadas con la calidad de la estimulación del desarrollo que se proporciona a los hijos, en líneas generales más positiva en las familias en las que padres e hijos son sordos. El factor que explica las diferencias entre ambas familias es la diferencia o similitud de estatus auditivo entre padres e hijos. Las difi cultades derivadas de la diferencia de estatus auditivo se superan cuando padres e hijos disponen de un código de comunicación común que sirve como vehículo para sus interacciones.The aim of this article is to revise the characteristics of the educational interactions of parents with children with hearing loss. For it, we distinguish among the families in those that the parents are listeners of those in those that the parents also suffer audition losses. The analysis of the peculiarities of the educational interactions in both types of families throws remarkable differences, mainly related with the quality of the stimulation of the development that is provided to the children, more positive in general lines in the families in those that parents and children are deaf. The factor that explains the differences among both families is the difference or similarity of auditory status between parents and children. The diffi culties derived of the difference of auditory status are overcome when parents and children have a common code of communication that is good as vehicle for their interactions

Langevin theory of absorbing phase transitions with a conserved magnitude

The recently proposed Langevin equation, aimed to capture the relevant critical features of stochastic sandpiles, and other self-organizing systems is studied numerically. This equation is similar to the Reggeon field theory, describing generic systems with absorbing states, but it is coupled linearly to a second conserved and static (non-diffusive) field. It has been claimed to represent a new universality class, including different discrete models: the Manna as well as other sandpiles, reaction-diffusion systems, etc. In order to integrate the equation, and surpass the difficulties associated with its singular noise, we follow a numerical technique introduced by Dickman. Our results coincide remarkably well with those of discrete models claimed to belong to this universality class, in one, two, and three dimensions. This provides a strong backing for the Langevin theory of stochastic sandpiles, and to the very existence of this new, yet meagerly understood, universality class.Comment: 4 pages, 3 eps figs, submitted to PR