An Innovation Model for Collaborative Networks of SOA-Based Software Providers

Part 5: Service Orientation in Collaborative Networks

EL PROCESO DE URBANIZACION EN LA PERIFERIA DEL AREA METROPOLITANA: LOS CASOS DE TURRUCARES Y MONTE DE LA CRUZ

Este avance de investigación pretende ofrecer una visión preliminar de un fenómeno bastante reciente que se está dando en Costa Rica y particularmente en el Valle Central: la urbanización del espacio agrícola. Este proceso se está desarrollando más allá del espacio suburbano y presenta una especialidad diferente, ya que aquí la organización social campesina y las actividades agropecuarias siguen siendo predominantes. Sin embargo, esta extremadamente vinculado con el proceso de metropolizacion que surge en el país. Se está asistiendo, pues, a una reubicación de los espacios residenciales de las clases de mejores ingresos, las cuales influenciadas tal vez por un modelo ideológico importado, buscan poder disfrutar de las ventajas que ofrece el espacio rural pero con la posibilidad de seguir trabajando en la ciudad y seguir gozando de los servicios urbanos. La  rural-urbanización dentro de una estrategia global de estructuración del espacio puede ser considerada como un mecanismo de selección y una apropiación de los mejores lugares donde se dará la futura de expansión urbana. Desde esta perspectiva, resulta interesante llamar la atención de cómo ciertos sectores sociales están proyectando desde ahora la futura expansión del espacio metropolitano.   SUMMARY This preliminary investigative report presents a viewpoint about a very recent phenomenon that is occurring in Costa Rica and especially in the Central Valley: the urbanization of the agrarian space. This process is developing beyond the suburban areas and presents a different spacial structure because in these areas, the rural social structures and the livestock and agricultural activities are still predominant. Nevertheless, such activities are very much related to the urbanization process occurring in the country. As such, we are witnessing a reubication of the residential structure of the high-income classes, of which, influenced perhaps by an improved idiologic model, hope to enjoy the advantages offered by a rural area but also taking advantage of the convenience offered by the urban benefits; plus the opportunity to keep working in the city. The process of rural urbanization conceived in a global strategy of spatial structures, can be considered as a selection and appropriation mechanism of the best areas for the future urban expansion. From this perspective, it is interesting to call attention to the process by which certain social sectors are now projecting the future organization of the metropolitan area.  In reference to the real-estate capital invested in the study areas, and specifically to Costa Rica capital, this investment in the promotion of real-estate, acts as a shelter sector, by changing the course of direction of the capital accumulated in the other economic sectors, especially considering that the real-estate sector insures more secure profits in spite of the relatively insignificant recuperation rate of the capital investment comparison to the industrial sector, where more capital risks occur, above all during an economic crisis.  At present, the zones influenced by rural urbanization are affected by a modification in their productive structure, in other words, what were once agricultural zones, are now converted to residential zones. This produces spectacular changes in the composition of the work force by producing service-oriented employment that leads to the following abandonment of the agricultural activities.  From a social point of view, this rural urbanization pattern provokes a marked spatial segregation, in which an exclusive high income social group with a particularly consuming life style is noted at one level, and on the other, social groups that inhered patterns of rural life with more traditional lifestyles. In reference to the community level in the study areas, localized conflicts have emerged between local people and the new residents. These conflicts are highly conditioned by the insertion in the communities of these new residents.       RESUME   Ce document préliminaire décrit un phénomène assez récent au Costa Rica, qui affecte plus particulièrement la « Vallée Centrale ». il s’agit de l’urbanisation de l’espace agricole.  Ce sont des espaces franchement ruraux, bien au-delà des banlieues, qui sont affectés par ce processus qui, en conséquence, montre des caractères différents: comme se maintien de la organisation social liée aux activités agricoles; en face l’infiltration d’un autre mode de vie dû à sa transformation en espace résidentiel pour classes aux revenus élevés qui, peut-être, influencées par un modèle culturel importé, préfèrent une localisation qui puisée leus offrir à  la fois les avantages de vivre dans un espace rural avec ceux de la ville, lieu de travail suffisamment proche dont elles continuent à pouvoir utiliser ses services. Ce modèle culturel doit être considère en fonction du processus de métropolitain apparu dan le pays. L’urbanisation de l’espace rural, dans une stratégie globale de structuration de l’espace peut se considérer comme un mécanisme de sélection et d’appropriation des meilleurs sites de l’expansion urbaine future.  Dans cette perspective, il est intéressant de constater qu’il existe déjà, de la part certains secteurs sociaux, un projet d’organisation de l’espace métropolitain futur. Le foncier est considéré comme un secteur refuge pour les capitaux nationaux d’où l’intérêt de la spéculation pour ces zones. En effet, ce placement, plus sûr, malgré un plus faible taux de récupération du capital, est préfère à d’ autres- comme l’investissement industriel- plus rentables, mais plus risqués, surtout en temps de crise. L’urbanisation de l’espace rural s’accompagne d’une modification des structures productives : moins d’agriculture et évolution de l’emploi vers le tertiaire liée à la présence de nouveaux résidents. Du point de vue social, cette situation se traduit par une très nette ségrégation spatiale. D’un côte, un group socio-économique aux revenus élèves représentant  la société de consommation ; de l’autre, les ruraux au style de vie plus traditionnel. Il en résulte une certaine tension entre les deux groupes.

Deployment of a data analysis workflow of the ATLAS experiment on HPC systems

LHC experiments produce an enormous amount of data, estimated of the order of a few PetaBytes per year. Data management takes place using the Worldwide LHC Computing Grid (WLCG) grid infrastructure, both for storage and processing operations. However, in recent years, many more resources are available on High Performance Computing (HPC) farms, which generally have many computing nodes with a high number of processors. Large collaborations are working to use these resources in the most efficient way, compatibly with the constraints imposed by computing models (data distributed on the Grid, authentication, software dependencies, etc.). The aim of this thesis project is to develop a software framework that allows users to process a typical data analysis workflow of the ATLAS experiment on HPC systems. The developed analysis framework shall be deployed on the computing resources of the Open Physics Hub project and on the CINECA Marconi100 cluster, in view of the switch-on of the Leonardo supercomputer, foreseen in 2023.

Analisi di log files prodotti dal sistema StoRM usato dall’esperimento ATLAS attraverso algoritmi di clustering

L'esperimento ATLAS, come gli altri esperimenti che operano al Large Hadron Collider, produce Petabytes di dati ogni anno, che devono poi essere archiviati ed elaborati. Inoltre gli esperimenti si sono proposti di rendere accessibili questi dati in tutto il mondo. In risposta a questi bisogni è stato progettato il Worldwide LHC Computing Grid che combina la potenza di calcolo e le capacità di archiviazione di più di 170 siti sparsi in tutto il mondo. Nella maggior parte dei siti del WLCG sono state sviluppate tecnologie per la gestione dello storage, che si occupano anche della gestione delle richieste da parte degli utenti e del trasferimento dei dati. Questi sistemi registrano le proprie attività in logfiles, ricchi di informazioni utili agli operatori per individuare un problema in caso di malfunzionamento del sistema. In previsione di un maggiore flusso di dati nei prossimi anni si sta lavorando per rendere questi siti ancora più affidabili e uno dei possibili modi per farlo è lo sviluppo di un sistema in grado di analizzare i file di log autonomamente e individuare le anomalie che preannunciano un malfunzionamento. Per arrivare a realizzare questo sistema si deve prima individuare il metodo più adatto per l'analisi dei file di log. In questa tesi viene studiato un approccio al problema che utilizza l'intelligenza artificiale per analizzare i logfiles, più nello specifico viene studiato l'approccio che utilizza dell'algoritmo di clustering K-means.

Agents and the Grid: Service Discovery

The Grid is a large-scale computer system that is capable of coordinating resources that are not subject to centralised control, whilst using standard, open, general-purpose protocols and interfaces, and delivering non-trivial qualities of service. In this chapter, we argue that Grid applications very strongly suggest the use of agent-based computing, and we review key uses of agent technologies in Grids: user agents, able to customize and personalise data; agent communication languages offering a generic and portable communication medium; and negotiation allowing multiple distributed entities to reach service level agreements. In the second part of the chapter, we focus on Grid service discovery, which we have identified as a prime candidate for use of agent technologies: we show that Grid-services need to be located via personalised, semantic-rich discovery processes, which must rely on the storage of arbitrary metadata about services that originates from both service providers and service users. We present UDDI-MT, an extension to the standard UDDI service directory approach that supports the storage of such metadata via a tunnelling technique that ties the metadata store to the original UDDI directory. The outcome is a flexible service registry which is compatible with existing standards and also provides metadata-enhanced service discovery.

FEARLUS-G: A Semantic Grid Service for Land-Use Modelling,

Postprint

A checkpointing-enabled and resource-aware Java Virtual Machine for efficient and robust e-Science applications in grid environments

Object-oriented programming languages presently are the dominant paradigm of application development (e. g., Java,. NET). Lately, increasingly more Java applications have long (or very long) execution times and manipulate large amounts of data/information, gaining relevance in fields related with e-Science (with Grid and Cloud computing). Significant examples include Chemistry, Computational Biology and Bio-informatics, with many available Java-based APIs (e. g., Neobio). Often, when the execution of such an application is terminated abruptly because of a failure (regardless of the cause being a hardware of software fault, lack of available resources, etc.), all of its work already performed is simply lost, and when the application is later re-initiated, it has to restart all its work from scratch, wasting resources and time, while also being prone to another failure and may delay its completion with no deadline guarantees. Our proposed solution to address these issues is through incorporating mechanisms for checkpointing and migration in a JVM. These make applications more robust and flexible by being able to move to other nodes, without any intervention from the programmer. This article provides a solution to Java applications with long execution times, by extending a JVM (Jikes research virtual machine) with such mechanisms. Copyright (C) 2011 John Wiley & Sons, Ltd.

Parallelization of web processing services on cloud computing: A case study of Geostatistical Methods

Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies.

monitoring-based approach to object-oriented real-time computing

Monitoring, object-orientation, real-time, execution-time, scheduling

Implementing interactive computing in an object-oriented environment

Statistical computing when input/output is driven by a Graphical User Interface is considered. A proposal is made for automatic control ofcomputational flow to ensure that only strictly required computationsare actually carried on. The computational flow is modeled by a directed graph for implementation in any object-oriented programming language with symbolic manipulation capabilities. A complete implementation example is presented to compute and display frequency based piecewise linear density estimators such as histograms or frequency polygons.

Object-oriented development of client / server application: case study of service control software

Tässä työssä on esitetty sen ohjelmiston kehittämisen prosessi, joka on tarkoitettu annettavien palveluiden valvottavaksi käyttäen prototyyppimallia. Raportti sisältää vaatimusten, kohteisiin suunnatun analyysin ja suunnittelun, realisointiprosessien kuvauksen ja prototyypin testauksen. Ohjelmiston käyttöala – antavien palveluiden valvonta. Vaatimukset sovellukselle analysoitiin ohjelmistomarkkinoiden perusteella sekä ohjelmiston engineeringin periaatteiden mukaisesti. Ohjelmiston prototyyppi on realisoitu käyttäen asiakas-/palvelinhybridimallia sekä ralaatiokantaa. Kehitetty ohjelmisto on tarkoitettu venäläisille tietokonekerhoille, jotka erikoistuvat pelipalvelinten antamiseen.

Extension and evaluation of JXTA protocols for supporting reliable P2P distributed computing

Peer-reviewed