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Towards a New Perspective of Building Tools for Context-Aware Mobile Applications
Get PDFTechnological growth has been exponential in relation to mobile devices (such as embedded sensors) that have allowed developing context-aware mobile applications for the market. This growth generates a new challenge about how to develop this kind of application to adapt them to the current user’s demand. Nowadays, there are several approaches that could be used to create context-aware mobile applications, but these approaches are designed without considering to provide variability in the kind of generated applications. The aim of this paper is to propose a building tool that has been designed from scratch taking into account variability points in order to generate a wide variety of contextaware mobile applications. The first version of our tool is presented in this paper which is based on UML tools like Eclipse, Sirius Obeo, and JBoss. Finally, a discussion of different aspects is detailed to help designers to have guidelines to select the appropriate development environment for the design of building tools for context-aware mobile applications.Publicado en: Gervasi O. et al. (eds) Computational Science and Its Applications – ICCSA 2020. ICCSA 2020. Lecture Notes in Computer Science, vol 12254. Springer, Cha
Transformaciones socio-territoriales en áreas de riesgo hídrico: el caso de los humedales urbanos argentinos
Get PDFEsta propuesta se centra particularmente en la revisión de la ciudad entendida como un sistema de relaciones entre actores. El espacio urbano es construido a través de las decisiones y acciones que los diferentes actores asumen, y también es disputado por ellos, desde quienes adquieren las lógicas territoriales propias del poder, vinculadas a las corporaciones y las élites económicas, las cuales se enmarcan en un paradigma economicista que enfatiza la importancia de transformar “los espacios en territorios eficientes, productivos, vaciables y sacrificables”; hasta actores que podrían llamarse de la resistencia, quienes despliegan estrategias en defensa del territorio, considerándolo un derecho. Y a ellos se suman actores políticos, quienes reproducen su poder en relación a los otros actores, como lo es el Estado (en todos sus niveles y escalas).
Se trata de una propuesta pedagógica que se estructura de la siguiente manera: 1) Contenidos de la propuesta; 2) herramientas del pensamiento critico; 3) fundamentación de la propuesta; 4) propuesta de actividades; 5) práctica experimental; y 6) la evaluación
Curso Taller sobre DROID
Get PDFEste taller estuvo dedicado a la enseñanza y usos del software DROID una herramienta abierta y gratuita y de muy fácil utilización realizada por National Archives con el propósito de perfilar archivos digitales.
El taller hizo un recorrido de los comandos y acciones posibles a realizar con DROID desde la instalación de la herramienta, la carga de archivos para realizar el perfilamiento (incluso la exclusión de algunos), la realización del perfil y el detalle de sus elementos y los modos de reporte que ofrece el software.
También se explicaron los contrastes que realiza el formato de archivo identificándolo en contrastre con el registro internacional PRONOM.
DROID tiene un uso concreto muy importante para quienes gestionan repositorios porque permite saber qué formatos tiene el repositorio para servir de guía en un plan de preservación. Del mismo modo como DROID puede realizar una suma de verificación, permite la detección de duplicados o problemas de integridad.
Para culminar el taller se explicaron diversas formas de extracción de contenidos (bitstreams) de un repositorio en DSPACE para así generar perfiles de interés.
Culminada la exposición y respondidas las preguntas, los participantes tuvieron oportunidad de hacer tareas prácticas de perfilamiento de archivos.This workshop was dedicated to the teaching and use of DROID software, an open and free and easy-to-use tool made by National Archives for the purpose of profiling digital files.
The workshop made a tour of the commands and possible actions to be carried out with DROID from the installation of the tool, the loading of files to perform the profiling (even the exclusion of some), the realization of the profile and the detail of its elements and the reporting modes offered by the software.
The contrasts made by the file format were also explained, identifying it in contrast to the international registry PRONOM.
DROID has a very important specific use for those who manage repositories because it allows to know what formats the repository has to serve as a guide in a preservation plan. In the same way as DROID can perform a checksum, it allows the detection of duplicates or integrity problems.
To conclude the workshop, various ways of extracting content (bitstreams) from a repository in DSPACE were explained in order to generate profiles of interest.
After the presentation and the questions answered, the participants had the opportunity to do practical file profiling tasks.Curso de DROID. Parte 1. https://youtu.be/SCCbEJ97QIs
Curso de DROID. Parte 2. https://youtu.be/8TEvKaunT2U
Curso de DROID. Parte 3. https://youtu.be/TikjJJXV40
Relationship between Gestalt and usability heuristics in mobile device interfaces
Get PDFWhile usability heuristics are universal concepts, visual references for using them in an application are limited, contradictory, and sometimes confusing, especially for novice developers. The present work has linked Nielsen's heuristics with Gestalt principles, which are the foundation of human perception, developed from psychology, and which have been used in art, design, and architecture, to understand how different visual stimulus can be interpreted by the human being. The heuristics, Match between system and the real world, Recognition rather than recall and Aesthetic and minimalistic design, have been linked with the Gestalt principles of Similarity, Proximity, Common direction, and Simplicity. This link is possible because Gestalt principles have certain conceptual similarities with usability heuristics, in addition to the fact that these fundamentals were identified in some mobile interfaces and are related to specific interactions. This work provides theoretical guidelines, visual references and practical examples on the use of some graphic components that are regularly used in mobile interfaces, such as buttons, menus, and sections; Besides, information is provided regarding how these visual components affect certain usability interactions such as learnability, efficiency, memorability, and usefulness
Framework based on Gestalt principles to design mobile interfaces for a better user experience
Get PDFThis paper presents the results of the user experience test comparing a real functional application and a high fidelity prototype that used a Framework to design graphic user interfaces on mobile devices. This Framework links Nielsen's heuristics with the principles of perception of Gestalt, offering to developers and usability experts, references to generate and evaluate mockups and prototypes. The constructive and evaluative model of the Framework allows to recognize usability criteria in visual components of the interfaces, during the initial phases of a project that uses agile software development methodologies, reducing the “trial - error” regressions. The experiment allowed obtaining data about satisfaction measures and specific user attitudes regarding the interfaces developed
Uso de macrofibras sintéticas en hormigón
Get PDFEl hormigón representa uno de los materiales más utilizados por el ser humano en todo el mundo. Entre los materiales que emplea la ingeniería civil se destaca por varias cualidades, es capaz de resistir la acción del agua sin un serio deterioro y permite moldear elementos estructurales con gran variedad de formas y tamaños; no menos importante es que representa el material más económico y rápidamente disponible en las obras y que comparado con otros materiales requiere menores insumos de energía, y finalmente puede incorporar grandes cantidades de desperdicios o subproductos, lo que considerando aspectos ecológicos, lo hará cada vez más atractivo en el futuro.
Sin embargo, el hormigón que es un material frágil, o si se quiere cuasifrágil, se caracteriza por contener microfisuras y en ocasiones fisuras en su interior, lo que constituye un aspecto determinante de la respuesta de los elementos estructurales. Las fisuras se producen no sólo por acción de las cargas, sino que el mismo desarrollo del proceso de hidratación del cemento genera cambios de volumen que se intensifican con el secado (contracción) o los saltos térmicos pueden dar lugar a la aparición de micro o macrofisuras ante las restricciones externas.
A la vez la exposición a altas temperaturas o el desarrollo de reacciones deletéreas pueden generar niveles de fisuración aún mayores.
Las micro y macrofisuras preexistentes poseen una incidencia directa en el mecanismo de rotura del material. No menos importante es que tales fisuras adquieren un rol determinante sobre la durabilidad de las estructuras de hormigón, tanto en elementos simples como armados
Nitrogen mineralized in anaerobiosis as indicator of soil aggregate stability
Get PDFMonitoring soil health status is imperative to pursue sustainable agriculture. Aggregate stability (AS) is fundamental to define several soil functions and, therefore, physical soil health. The objectives of thisworkwere to (i) evaluate the effect of contrasting cropping systems on AS, soil (SOC) and particulate (POC) organic carbon, and anaerobic nitrogen (AN) both in bulk soil and in macroaggregates (MA), and (ii) assess the relationship between AS and AN both in bulk soil and in MA to facilitate soil physical health monitoring. Aggregate stability, AN, SOC and POC were evaluated at three depths (0–5, 5–20, and 0–20 cm) in a Mollisol of the Southeastern Argentinean Pampas under a long-term experiment of cropping systems (crop-pasture rotations under conventional tillage [CT] and no-tillage [NT]). Bulk-soil SOC and POC contents and AN showed the effect of cropping systems, especially the effect of crop-pasture rotation and at 0–5 cm depth. However, NT did not lead to SOC sequestration except at 0–5 cm depth. In turn, pastures in the rotation and NT improved AS. Bulk-soil AN explained 75, 41, and 71% of AS at 0–5, 5–20, and 0–20 cm depths, respectively, and provides an indication of AS status. Instead, AN in MA did not explain bulk-soil AS changes as much as bulk-soil AN, except at 0–5 cm depth. Therefore, it is not worth determining AN in MA. However, routine bulk-soil AN determination at 0–20 cm depth by producers to diagnose nitrogen soil fertility would also provide an additional valuable indication of AS status
One-body entanglement as a quantum resource in fermionic systems
Get PDFWe show that one-body entanglement, which is a measure of the deviation of a pure fermionic state from
a Slater determinant (SD) and is determined by the mixedness of the single-particle density matrix (SPDM),
can be considered as a quantum resource. The associated theory has SDs and their convex hull as free states,
and number conserving fermion linear optics operations (FLO), which include one-body unitary transformations
and measurements of the occupancy of single-particle modes, as the basic free operations. We first provide
a bipartitelike formulation of one-body entanglement, based on a Schmidt-like decomposition of a pure Nfermion
state, from which the SPDM [together with the (N − 1)-body density matrix] can be derived. It is then
proved that under FLO operations the initial and postmeasurement SPDMs always satisfy a majorization relation,
which ensures that these operations cannot increase, on average, the one-body entanglement. It is finally shown
that this resource is consistent with a model of fermionic quantum computation which requires correlations
beyond antisymmetrization. More general free measurements and the relation with mode entanglement are also
discussed
Nonlinear effects on the dynamics of quantum harmonic modes coupled through angular momentum
Get PDFWe investigate nonlinear effects on the dynamics of entanglement and other quantum observables in a system of two harmonic modes coupled through angular momentum. The nonlinearity arises from a Kerr-type anharmonic term in each mode. The emergence and evolution of entanglement, non-Gaussianity, photon number, photon antibunching and squeezing are examined for different initial coherent product states and couplings, through exact diagonalization in a truncated basis. It is shown that the anharmonic terms, even if weak, can lead to very significant effects for such initial states, considerably enhancing and stabilizing entanglement and leading to a non negligible non-Gaussianity of the evolved states. They also affect other observables, stabilizing the dynamics after an initial transient regime, for not too small initial average populations of each mode. Analytic short-time approximate expressions are also provided
Programas de transferencias condicionadas de ingreso en Argentina en la última década: el caso del programa “Ingreso social con trabajo”
No full textEl presente trabajo tiene por objetivo analizar el programa Ingreso Social con Trabajo (PRIST) situando tres ejes principales de aplicación: transición de transferencias condicionadas masivas a generación de empleos a través de cooperativas tuteladas, incorporación de la perspectiva de la Economía Social y Solidaria (ESS) y territorialidad. Para ello, desarrollaremos como metodología de análisis el estudio de caso con una mirada macro y recurriremos al uso de segundas fuentes, tales como informes del Ministerio de Desarrollo Social (MDS), organismos, artículos científicos y otros datos disponibles