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Literatura académica sobre el tema "Services Web – Migration"

Autor: Grafiati

Publicado: 9 de noviembre de 2023

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Artículos de revistas sobre el tema "Services Web – Migration"

Gajo, Marianne. "Nasdaq plant Migration auf Amazon Web Services". Die Aktiengesellschaft 67, n.º 1-2 (1 de enero de 2022): r8. http://dx.doi.org/10.9785/ag-2022-671-211.

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Kazzaz, M. Mohanned y Marek Rychlý. "A Case Study". International Journal of Systems and Service-Oriented Engineering 8, n.º 1 (enero de 2018): 44–57. http://dx.doi.org/10.4018/ijssoe.2018010103.

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This article provides a proof-of-concept of the applicability and reusability of the authors proposed framework for web service migration through a traffic jam detection case study. The framework migrates mobile hosted web services between mobile vehicles using context-aware self-adaptive mechanism in order to guarantee service availability and quality. A decision-making process is implemented to select the best destination vehicle from between the found possible migrations based on prioritized criteria set.

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Katre, Mandeep. "Student Services App". International Journal for Research in Applied Science and Engineering Technology 9, n.º VII (10 de julio de 2021): 481–85. http://dx.doi.org/10.22214/ijraset.2021.36346.

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Cross-platform mobile application development is the pressing priority in today’s world and generation. Developers are enforced to either construct the same application numerous times for various OS (operating systems) or accept a low-quality similar solution that trades native speed and accuracy for portability. Flutter is an open-source SDK for developing high-performance and more reliable mobile applications for operating systems like iOS, Android and even windows [1]. Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase. Student Service App is an automation which will provide duplicate degree, duplicate marksheet, migration, transcript, provisional degree and document verification services to all registered the Universities. It will provide University services related to academics to its registered students via mobile devices on their finger tips for which they have to be present physically at respective places. It has Service oriented architecture so that it will be integrated to the existing ERP (Web Portal) of the different universities.

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Pulsani, B. R. "TANK INFORMATION SYSTEM (TIS): A CASE STUDY IN MIGRATING WEB MAPPING APPLICATION FROM FLEX TO DOJO FOR ARCGIS SERVER AND THEN TO OPEN SOURCE". ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-4/W4 (13 de noviembre de 2017): 311–17. http://dx.doi.org/10.5194/isprs-annals-iv-4-w4-311-2017.

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Tank Information System is a web application which provides comprehensive information about minor irrigation tanks of Telangana State. As part of the program, a web mapping application using Flex and ArcGIS server was developed to make the data available to the public. In course of time as Flex be-came outdated, a migration of the client interface to the latest JavaScript based technologies was carried out. Initially, the Flex based application was migrated to ArcGIS JavaScript API using Dojo Toolkit. Both the client applications used published services from ArcGIS server. To check the migration pattern from proprietary to open source, the JavaScript based ArcGIS application was later migrated to OpenLayers and Dojo Toolkit which used published service from GeoServer. The migration pattern noticed in the study especially emphasizes upon the use of Dojo Toolkit and PostgreSQL database for ArcGIS server so that migration to open source could be performed effortlessly. The current ap-plication provides a case in study which could assist organizations in migrating their proprietary based ArcGIS web applications to open source. Furthermore, the study reveals cost benefits of adopting open source against commercial software's.

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Nickelsen, Anders, Fabio Paternò, Agnese Grasselli, Kay-Uwe Schmidt, Miquel Martin y Francesca Mureddu. "OPEN Platform for Migration of Interactive Services". International Journal of Adaptive, Resilient and Autonomic Systems 3, n.º 2 (abril de 2012): 18–43. http://dx.doi.org/10.4018/jaras.2012040102.

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One important aspect of ubiquitous environments is to provide users with the possibility to freely move about and continue to interact with the available applications through a variety of interactive devices such as cell phones, PDAs, desktop computers, intelligent watches, or digital television sets. Migratory applications are able to follow the user by sensing changes in the user’s context and adapting to available devices, ideally without interrupting the user experience. However, applications themselves must contain functions to monitor context information, coordinate a migration, handle application adaptation, and interact with the user during the migration process. To make life easier for developers and users of migratory applications, an integrated Migration Service Platform (MSP) is proposed, where all the common migration functions are centralised. The authors show how the platform is realised as middleware that contains a server for the central functions and lightweight client-side running on the end-user devices. The authors show how migratory applications can interact with the platform and thereby do not have to contain migration functions themselves. The authors describe the challenges following the centralisation of a migration platform that can support different types of applications, both games and business applications, implemented with either web-technologies or as component-based applications.

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Williams, Peter y David Nicholas. "The migration of news to the web". Aslib Proceedings 51, n.º 4 (1 de mayo de 1999): 122–34. http://dx.doi.org/10.1108/eum0000000006971.

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Virtually all UK and US newspapers and the vast majority of regional and even local titles are now represented on the web. Indeed, the Yahoo news and media directory lists no less than 114 UK newspapers online (as of November 1998). Broadcasters from the BBC and Sky downwards, and all the famous news agencies (Press Association, Reuters etc.) also boast comprehensive Internet services. With such an array of sources available, the future of mass access to the Internet, possibly via TV terminals, suggests that more and more people may soon opt for this medium to receive the bulk of their news information. This paper gives an overview of the characteristics of the medium illustrated with examples of how these are being used to both facilitate and enhance the content and dissemination of the news product. These characteristics include hyperlinking to external information sources, providing archive access to past reports, reader interactivity and other features not possible to incorporate into more passive media such as the hardcopy newspaper. From a survey of UK and US news providers it is clear that American newspapers are exploiting the advantages of web information dissemination to a far greater extent than their British counterparts, with the notable exception of The Electronic Telegraph. UK broadcasters, however, generally appear to have adapted better to the new medium, with the BBC rivaling CNN in its depth and extent of news coverage, use of links and other elements.

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Grimshaw, Andrew, Mark Morgan y Karolina Sarnowska. "WS-Naming: location migration, replication, and failure transparency support for Web Services". Concurrency and Computation: Practice and Experience 21, n.º 8 (10 de junio de 2009): 1013–28. http://dx.doi.org/10.1002/cpe.1407.

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Hu, Guang Chang, Bu Dan Wu y Jun Liang Chen. "Service Discovery Based on Self-Evolution of Domain Ontology and Cloud Migration of Web Service". Applied Mechanics and Materials 543-547 (marzo de 2014): 2915–19. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.2915.

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To meet the demand of the higher precision ratio and recall ratio of service search, a method of Web service discovery is proposed based on ontology evolution and Web service migration. According to the developed cloud service platform and the existed service repository and domain ontology list, a service migration process is proposed which migrate to the cloud platform and implement unified management for Web service. This process effectively achieves that Web services migrate in and out of the cloud platform. In order to realize the self-evolution of domain ontology, an ontology alignment mechanism is designed to automatic extend and replace of ontology concept. This mechanism achieves the integration of different keywords with the same meaning and ensures the consistency of ontology concept. In this paper, the method not only enables efficient service discovery and dynamic service management, but also can achieve high concurrency support of services and supply or billing on demand. The experiments show that the proposed method solves the search problem of low efficiency based on keyword, and it effectively improves the precision ratio and recall ratio of service discovery.

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Kurako, E. A., R. E. Asratian y V. L. Orlov. "Import Substitution of Information Systems based on the С# Language and Network". Programmnaya Ingeneria 14, n.º 10 (17 de octubre de 2023): 471–81. http://dx.doi.org/10.17587/prin.14.471-481.

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The purpose of the article is to study methods of migration to other environments of information systems previously created in Microsoft Windows in the C# language. These environments either belong to the open class, or were developed directly in Russia. One of the main migration tools is the separation of systems into components. In this case, the transformation tasks of each component are solved separately. Methods of transformation of information systems functioning in an environment based on operating systems, database management tools, web tools, frameworks and libraries are considered. The main directions of preparation of the executive environment, the components of which are included in the register of Russian software, or provide open source codes, are highlighted. Operating systems that meet the given criteria are selected. Basically, these systems are founded on Linux kernel. Methods for configuring the Apache 2 web server and creating a virtual host are defined. A brief assessment of database migration methods was carried out. The issues of correcting the C# source code when changing the operating environment and methods of converting the source text when changing the ways of working with the graphical user interface are considered. The main problems during the transition to the new system and ways to solve them are shown. Taking into account the mandatory code correction required during the migration process and the development of a new graphical user interface, the transition from Windows to Linux is possible at real time-consuming costs. Using existing methods of migrating databases, web services and client applications allows you to complete the migration of information systems based on the C# language into environments that meet the criteria for import substitution.

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Chang, Chen Chi. "Hakka genealogical migration analysis enhancement using big data on library services". Library Hi Tech 36, n.º 3 (17 de septiembre de 2018): 426–42. http://dx.doi.org/10.1108/lht-08-2017-0172.

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Purpose The purpose of this paper is to explore the data connection, spatial distribution characteristics and trends in genealogical information. First, it implements a spatial-temporal visualization of the Hakka genealogical information system that makes these individual family pedigree charts appear as one seamless genealogy to family and researchers seeking connections and family history all over the world. Second, this study applies migration analysis by applying big data technologies to Hakka genealogies to investigate the migration patterns of the Hakka ethnic group in Taiwan between 1954 and 2014. This innovative library service enhances the Hakka genealogical migration analysis using big data. Design/methodology/approach The platform is designed for the exchange of genealogical data to be used in big data analysis. This study integrates big data and geographic information systems (GIS) to map the population distribution themes. The general procedure included collecting genealogical big data, geographic encoding, gathering the map information, GIS layer integration and migration map production. Findings The analytical results demonstrate that big data technology is highly appropriate for family migration history analysis, given the increasing volume, velocity and variety of genealogical data. The spatial-temporal visualization of the genealogical research platform can follow family history and migration paths, and dynamically generate roadmaps to simplify the cartographic steps. Practical implications Technology that combines big data and GIS is suitable for performing migration analysis based on genealogy. A web-based application for spatial-temporal genealogical information also demonstrates the contribution of innovative library services. Social implications Big data play a dominant role in library services, and in turn, provide an active library service. These findings indicate that big data technology can provide a suitable tool for improving library services. Originality/value Online genealogy and family trees are linked with large-volume, growing data sets that are complex and have multiple, autonomous sources. The migration analysis using big data has the potential to help genealogy researchers to construct minority ethnic history.

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Tesis sobre el tema "Services Web – Migration"

Silva, Clay Palmeira Da. "The CUBE : a user-centric system-model architecture for web service migration through multiple devices". Electronic Thesis or Diss., Tours, 2019. http://www.theses.fr/2019TOUR4041.

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Dans la tendance d'Internet, nous commençons à compter nos activités quotidiennes sur les systèmes de base en nuage pour stocker nos données et pour suivre tout notre état et comportement lors de l'utilisation de services Web. Par conséquent, nos données ne sont plus sécurisées comme auparavant, car nous avons délégué la responsabilité de les protéger, de les sécuriser et de les stocker à des tiers. Ces dernières années, de grandes entreprises telles que Yahoo, Facebook ou LinkedIn ont été victimes de plusieurs fuites, ce qui montre à quel point nous sommes vulnérables. Nous disposons aujourd'hui d'appareils mobiles plus puissants que jamais. Cependant, nous n'explorons pas leurs capacités en matière de traitement, de stockage et de mesures de sécurité pour utiliser les services Web localement. De plus, nos appareils sont fondamentalement divisés en deux mondes différents, ceux avec Android et ceux avec un système d'exploitation iOS. Néanmoins, avec la popularité de la technologie mobile, notre comportement a changé. Aujourd'hui, il est courant de trouver un utilisateur utilisant deux ou trois appareils mobiles en même temps, souvent avec un système d'exploitation différent. Par conséquent, nous sommes simultanément confrontés à un environnement à plusieurs périphériques avec le même système d'exploitation ou des systèmes d'exploitation différents, dans lequel la plupart des technologies et des services Web nécessitent le recours à un fournisseur tiers pour la synchronisation et le maintien de l'état de nos tâches quotidiennes. Bien que ce scénario chaotique concerne plusieurs appareils et systèmes d'exploitation, il existe une technologie mentionnée précédemment à la fin des années 90, appelée Liquid Software, qui pourrait être une solution pour harmoniser ce scénario. Le Liquid Software vise à permettre une migration fluide vers différents appareils avec ou sans le même système d'exploitation, tout en préservant l'expérience utilisateur d'une application ou d'un service donné. Dans cette thèse, basée sur les principes de Liquid Software, nous nous concentrons sur un environnement multi-périphériques capable de synchroniser le service Web côté client sans dépendre d'un système de base Cloud. Nous avons proposé une architecture basée sur des modèles, appelée Le CUBE, qui utilise des principes centrés sur l'utilisateur combinés à différentes technologies, telles que les principes REST et RESTful. Le CUBE propose également un modèle à quatre couches dans lequel REST et RESTful fonctionnent indépendamment l'un de l'autre mais en coopération. Un autre élément critique du CUBE est la couche de conversation (CC), modélisée dans le but de permettre la modification des données / états à partir des services Web. La CC utilise des techniques de traitement du langage naturel pour trouver et définir des services Web adaptés à l'utilisateur. Une autre contribution du CUBE est la création d'une sorte de réseau d'utilisateurs appelé INNER CUBE, avec tous les appareils mobiles appartenant à un seul utilisateur. Le but de la combinaison de ces éléments au sein d'une seule unité, le CUBE, est de permettre le transfert fluide de services/données et de sessions d'appareils (ordinateurs de bureau, ordinateurs portables et téléphones mobiles) vers d'autres appareils, quel que soit leur système d'exploitation, et au même temps, entièrement transparent pour l'utilisateur final, tout en réduisant la dépendance du fournisseur tiers. Nous avons également proposé deux tests pour valider le modèle CUBE
Within the trend of the Internet, we start to rely our daily activities on Cloud Base Systems to store our data and keep tracking all our state and behavior while using Web Services. Therefore, our data are no longer safe as before since we have delegated the responsibility to keep them safe, secure, and stored by third-party providers. In the last few years, big companies such as Yahoo, Facebook, or LinkedIn were victims of several leaks, which demonstrates how vulnerable we are. We have nowadays more powerful mobile devices than ever before. However, we do not explore their capacities regarding processing, storage, and security measures to using Web Services locally. Moreover, our devices are basically divided into two different worlds, those with Android, and those with an iOS operating system. Nevertheless, with the popularity of mobile technology, our behavior has changed. Today it is common to find a user using two or three mobile devices at the same time, and often they have a different operating system. Therefore, we are facing simultaneously a multiple-device environment with the same or different operating systems, where most of the technology and Web Services requiring a third-party provider to synchronizing and keep the state of our daily tasks. Although of this chaotic scenario regarding multiples devices and operating systems, there is a technology earlier mentioned at the end of 90's called Liquid Software that may be a solution to bring harmony to this scenario. The Liquid Software aims to allow for fluently migrate towards different devices with or without the same operating system, and at the same time keep the user-experience of a given application or service. In this thesis, based on Liquid Software principles, we focus on multiple devices environment able to synchronize Web Service at the client-side without depending on a Cloud Base System. We proposed the model-based architecture, called the CUBE, that makes use of User-Centric principles combined with different technologies, such as REST and RESTful principles. The CUBE also proposes a four layers model where REST and RESTful work independently from each other but in cooperation. Another critical element of the CUBE is the Conversation Layer (CL), modeled with the purpose to allow change data/state from Web Services. The CL makes use of techniques of Natural Language Processing to find and defining suitable Web Services to the user. Another contribution of the CUBE is creating a kind of user-network called INNER CUBE with all mobile devices that belong to a single user. The aim of combining these elements inside a single unit, the CUBE, is to allow for fluently move services/data and sessions from devices (desktops, laptops, and mobiles phones) to other ones regardless of their operating system, and at the same time, entirely transparent for the final user, and also reducing the dependency of the third-party provider. We have also proposed two tests to validate the CUBE model

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Lanfermann, Gerd. "Nomadic migration : a service environment for autonomic computing on the Grid". Phd thesis, Universität Potsdam, 2002. http://opus.kobv.de/ubp/volltexte/2005/81/.

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In den vergangenen Jahren ist es zu einer dramatischen Vervielfachung der verfügbaren Rechenzeit gekommen. Diese 'Grid Ressourcen' stehen jedoch nicht als kontinuierlicher Strom zur Verfügung, sondern sind über verschiedene Maschinentypen, Plattformen und Betriebssysteme verteilt, die jeweils durch Netzwerke mit fluktuierender Bandbreite verbunden sind.
Es wird für Wissenschaftler zunehmend schwieriger, die verfügbaren Ressourcen für ihre Anwendungen zu nutzen. Wir glauben, dass intelligente, selbstbestimmende Applikationen in der Lage sein sollten, ihre Ressourcen in einer dynamischen und heterogenen Umgebung selbst zu wählen: Migrierende Applikationen suchen eine neue Ressource, wenn die alte aufgebraucht ist. 'Spawning'-Anwendungen lassen Algorithmen auf externen Maschinen laufen, um die Hauptanwendung zu beschleunigen. Applikationen werden neu gestartet, sobald ein Absturz endeckt wird. Alle diese Verfahren können ohne menschliche Interaktion erfolgen.
Eine verteilte Rechenumgebung besitzt eine natürliche Unverlässlichkeit. Jede Applikation, die mit einer solchen Umgebung interagiert, muss auf die gestörten Komponenten reagieren können: schlechte Netzwerkverbindung, abstürzende Maschinen, fehlerhafte Software. Wir konstruieren eine verlässliche Serviceinfrastruktur, indem wir der Serviceumgebung eine 'Peer-to-Peer'-Topology aufprägen. Diese “Grid Peer Service” Infrastruktur beinhaltet Services wie Migration und Spawning, als auch Services zum Starten von Applikationen, zur Dateiübertragung und Auswahl von Rechenressourcen. Sie benutzt existierende Gridtechnologie wo immer möglich, um ihre Aufgabe durchzuführen. Ein Applikations-Information- Server arbeitet als generische Registratur für alle Teilnehmer in der Serviceumgebung.
Die Serviceumgebung, die wir entwickelt haben, erlaubt es Applikationen z.B. eine Relokationsanfrage an einen Migrationsserver zu stellen. Der Server sucht einen neuen Computer, basierend auf den übermittelten Ressourcen-Anforderungen. Er transferiert den Statusfile des Applikation zu der neuen Maschine und startet die Applikation neu. Obwohl das umgebende Ressourcensubstrat nicht kontinuierlich ist, können wir kontinuierliche Berechnungen auf Grids ausführen, indem wir die Applikation migrieren. Wir zeigen mit realistischen Beispielen, wie sich z.B. ein traditionelles Genom-Analyse-Programm leicht modifizieren lässt, um selbstbestimmte Migrationen in dieser Serviceumgebung durchzuführen.
In recent years, there has been a dramatic increase in available compute capacities. However, these “Grid resources” are rarely accessible in a continuous stream, but rather appear scattered across various machine types, platforms and operating systems, which are coupled by networks of fluctuating bandwidth. It becomes increasingly difficult for scientists to exploit available resources for their applications. We believe that intelligent, self-governing applications should be able to select resources in a dynamic and heterogeneous environment: Migrating applications determine a resource when old capacities are used up. Spawning simulations launch algorithms on external machines to speed up the main execution. Applications are restarted as soon as a failure is detected. All these actions can be taken without human interaction.

A distributed compute environment possesses an intrinsic unreliability. Any application that interacts with such an environment must be able to cope with its failing components: deteriorating networks, crashing machines, failing software. We construct a reliable service infrastructure by endowing a service environment with a peer-to-peer topology. This “Grid Peer Services” infrastructure accommodates high-level services like migration and spawning, as well as fundamental services for application launching, file transfer and resource selection. It utilizes existing Grid technology wherever possible to accomplish its tasks. An Application Information Server acts as a generic information registry to all participants in a service environment.

The service environment that we developed, allows applications e.g. to send a relocation requests to a migration server. The server selects a new computer based on the transmitted resource requirements. It transfers the application's checkpoint and binary to the new host and resumes the simulation. Although the Grid's underlying resource substrate is not continuous, we achieve persistent computations on Grids by relocating the application. We show with our real-world examples that a traditional genome analysis program can be easily modified to perform self-determined migrations in this service environment.

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Gustafsson, Jonas y Fredrik Alserin. "CCS - Collect, Convert and Send : Designing and implementing a system for data portability and media migration to mobile devices". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-945.

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In this thesis we will identify which are the desired features and functionalities for implementing a system capable of acting as an information bridge for content available in the “wired” Internet to be delivered to mobile devices. We will also explore how to design and build such a system based on the specifications within parts of the MUSIS project. The MUSIS’ system development is used as a base of the work described in this thesis and the experiences from those efforts are used in order to design a system with more focus on data portability and media migration.

During the development of the MUSIS platform, problems related to system upgrading, i.e. adding new ad-hoc functionalities were discovered. Due to the fact that a user-centred design approach was taken, this was essential in the project. To solve some of these issues, we propose a new component-based system with a high level of scalability and re-usability. We name this system Collect, Convert and Send, CCS. The system shall be seen as a base that can be used as a core system for different projects where interoperability of content between different platforms, devices or systems is important.

The implementation of the system is based on the use cases and those theoretical aspects and ideas related to component software, interoperability, media migration and metadata in a Web service context. The results of our efforts give some indications that the use of component software gives a foundation for a service-oriented architecture.

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Adeyinka, Oluwaseyi. "Service Oriented Architecture & Web Services : Guidelines for Migrating from Legacy Systems and Financial Consideration". Thesis, Blekinge Tekniska Högskola, Avdelningen för för interaktion och systemdesign, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1297.

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The purpose of this study is to present guidelines that can be followed when introducing Service-oriented architecture through the use of Web services. This guideline will be especially useful for organizations migrating from their existing legacy systems where the need also arises to consider the financial implications of such an investment whether it is worthwhile or not. The proposed implementation guide aims at increasing the chances of IT departments in organizations to ensure a successful integration of SOA into their system and secure strong financial commitment from the executive management. Service oriented architecture technology is a new concept, a new way of looking at a system which has emerged in the IT world and can be implemented by several methods of which Web services is one platform. Since it is a developing technology, organizations need to be cautious on how to implement this technology to obtain maximum benefits. Though a well-designed, service-oriented environment can simplify and streamline many aspects of information technology and business, achieving this state is not an easy task. Traditionally, management finds it very difficult to justify the considerable cost of modernization, let alone shouldering the risk without achieving some benefits in terms of business value. The study identifies some common best practices of implementing SOA and the use of Web services, steps to successfully migrate from legacy systems to componentized or service enabled systems. The study also identified how to present financial return on investment and business benefits to the management in order to secure the necessary funds. This master thesis is based on academic literature study, professional research journals and publications, interview with business organizations currently working on service oriented architecture. I present guidelines that can be of assistance to migrate from legacy systems to service-oriented architecture based on the analysis from comparing information sources mentioned above.

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Dong, Zhu. "Challenges and Opportunities in Migrating to Web-based Informations Services : Perspective of Web-based Enterprise". Thesis, Jönköping University, JIBS, Business Informatics, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-7425.

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For now, vastly growing Web-technology has matured enough to become an attractiveplatform for business applications and organizational information systems. Indeed, largeand small organizations are increasing their investment in Web-based Information Systems(IS) resources, such as Electronic Commerce, Intranets and Extranets. As DIWA(1999) explained that Web technology is often presented as a 'revolution' in informationsystem technologies in the business press, which could propel change from static, hierarchicalstructures to more dynamic, flexible and 'knowledge-based' organizationalforms. To the companies, more and more legacy information and database systems arebeing migrated to Web-based environments.

This research aims to analyse and advise enterprises to be Web-based enterprise withchallenges and opportunities.

During the research, the author investigated a company that were using the Web-based(applications made available via the World Wide Web) information service. For obtainingreliable conclusions and delivering valuable advises, various research methods wereadopted by the author including qualitative research methodology, analysis, interviews,and literature study. Data was collected through lecture review and in-depth interviews.

Undoubtedly, there are some troubles existed in migrating, such as technologies for restructureinformation system structure, resource distribution, benefit analysis, planningand management, operation and maintenance etc.

But still obviously, as the research shows that there are many benefits can be got followsthe implementation of Web-based solution, which includes improving efficiency,modernizing company IT environment, providing better IS/IT systems’ maintenanceand providing more agility and functionality etc.

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Lafranchise, Paul Andrew. "Migrating Department of Defense (DoD) Web Service Based Applications to Mobile Computing Platforms". Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/6820.

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This thesis explores techniques for extending Department of Defense (DoD) Information Technology (IT) capability from web-based desktop clients to mobile platforms. Specifically, we examine how existing data services can be consumed by native and web-based mobile clients without modification to the services. We consider the data access layer, the User Interface (UI) design, and the Total Cost of Ownership (TCO) as areas to compare and contrast each implementation. We develop a web-based application and implement comparable capability on native and web-based mobile clients. We determined that native applications and mobile aware web applications are capable of consuming an existing web service without modifying the service. In general, we find no clear advantage between our mobile implementations when consuming existing web services and maintaining a consistent UI. We found that, while developing a data access module, it is difficult to share code between an existing web application and a native mobile application. We find that in some cases, a mobile aware web application excels at rapidly deploying on multiple devices and because it maintains a single code baseline lowering the TCO.

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Eriksson, Magnus y Erik Jonsson. "Migration av distribuerad relationsdatabas för lagring i webbläsare". Thesis, Uppsala universitet, Informationssystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202588.

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An increasing amount of companies and organizations are starting to implement the use of cloud computing in their business. This trend results in that software, which was previously sold and distributed to the customers whom then had to install the software on their own computers, now is being replaced with Software as a Service (SaaS). SaaS makes software available through the customers’ browsers, which results in that the service providers only have to administer a single application. The process to migrate a distributed application to a service delivered as a SaaS lacks sufficient investigation; this paper will provide some guidelines for conducting such a pro- cess. During the work on this paper, a prototype of a service delivered as a SaaS has been devel- oped with the intention to test, among other things, how a distributed relational database can be converted to a key/value pair storage. A conversion of this kind enables data to be stored locally in the customers’ browsers, which relieves some pressure on the server as well as enables the application to be used in offline-mode. The paper results in three guidelines which should be considered when planning to migrate software to a service delivered as a SaaS with a local data- base; Think before you act, Don’t expose your soul and Size matters. These guidelines describe how a migration process should be planned, when an application is not deemed appropriate to migrate and when a conversion of the database is not appropriate.
Allt fler företag och organisationer börjar implementera användandet av olika molntjänster i sin verksamhet. Den här trenden medför att programvaror, som tidigare sålts och distribuerats till kunder vilka sedan själva får installera dem på sina egna datorer, nu börjar ersättas med en Soft- ware as a Service (SaaS). Det innebär att programvaran istället finns tillgänglig på Internet via kundernas webbläsare, något som medför att tjänsteleverantören enbart behöver administrera en enda programvara. Processen att migrera en distribuerad programvara till en SaaS-tjänst saknar ordentlig utredning, det här arbetet syftar därför till att ta fram några vägledande riktlinjer för en sådan process. Under arbetets gång har en prototyp av en SaaS-tjänst utvecklats med syfte att testa bland annat hur en tidigare distribuerad relationsdatabas kan konverteras till nyckel/värde- par. En sådan konvertering möjliggör lokal lagring av data i kundernas webbläsare, vilket mins- kar belastningen på servern samt erbjuder möjligheten att arbeta offline. Arbetet resulterar i tre riktlinjer att beakta då en migration till en SaaS-tjänst med lokal databas planeras; Tänk efter, före, Blotta inte din själ och Storleken har betydelse. Riktlinjerna beskriver hur en migrations- process bör planeras, när en applikation inte anses lämplig att migrera samt när en konvertering av databasen inte anses lämplig.

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Almonaies, ASIL. "A FRAMEWORK FOR MIGRATING WEB APPLICATIONS TO WEB SERVICES". Thesis, 2013. http://hdl.handle.net/1974/7865.

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Service Oriented Architecture (SOA) is an increasingly important software architecture, designed to flexibly connect separate components in response to rapid changes in the business environment. SOA focuses on the exchange of information between independent software components and on the reusability of the components by separating communication interface from internal implementation. There are several features of SOA that make legacy system modernization to SOA appealing in today’s world. These are loose coupling, abstraction of underlying logic, agility, flexibility, reusability, autonomy, statelessness, discoverability and reduced cost. Migration of legacy systems to SOA is an important problem. While migration of legacy data processing systems has been widely studied, migration of legacy web applications has not. In this thesis we review existing strategies for migration of monolithic legacy web applications to web services, noting the unique challenges due to the highly dynamic nature of the systems, poorly structured code, and weakly typed languages in web applications, and the need for automation to assist in the process. We present a new semi-automated framework for the analysis and migration of monolithic web applications to web services using source analysis and transformation techniques, and outline a set of source transformation steps that can be used to migrate existing legacy web applications to web services form. We demonstrate our framework on the analysis and automated restructuring of two large existing web applications to extract and migrate integrated internal features to independent, reusable web services.
Thesis (Ph.D, Computing) -- Queen's University, 2013-03-28 14:23:24.797

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Ribeiro, Didier Martins. "A Web-based Solution for Virtual Machine Instances Migration Across Type-2 Hypervisors". Master's thesis, 2014. http://hdl.handle.net/10400.6/6170.

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Cloud computing has improved computing efficiency by reducing the cost to the users. A current datacenter consists of tens to hundreds of thousands of servers and contains hundreds of thousands of switches connected hierarchically. Sharing processing resources through services like "software as service" (SaaS), users can amortize the cost of hardware and software. To facilitate upgrades and maintenance of systems, virtual machines (VMs) are often used to provide services, and their migrations result in better use of resources. The cloud, supported by virtualization is emerging as an important paradigm of "oriented service". The administration of systems is critical to provide availability and performance in data systems, providing automated the required real-time capacity to meet service requests. But virtualization does not reduce the complexity of a system. In fact, the execution of multiple virtual machines (VMs) on top of a physical infrastructure can increase overall system complexity and present new challenges in his administration. Virtualization of resources is a key component of "cloud computing" to provide computing and storage services being ubiquitous in today's "data center". Support for servers by building cluster of virtual machines is universally adopted to maximize the utilization of hardware resources. Virtualization has become a key technology implemented by a growing number of organizations related to Information Technology (IT) worldwide. Virtualization of systems has rapidly gained popularity because of its potential to reduce the costs of TI's. Allowing IT managers to increase the use of existing physical resources and even reduce the number of deployed systems. This consolidation helps reduce hardware requirements management, reducing the need for power and cooling, and thus reducing the costs of TI's in general. Additionally, the deployment of virtualization solutions typically means increased management tools to the existing environment. Access to software and data anywhere, anytime, on any device and in any connectivity, has long been a crucial issue for researchers and architects systems. The amount of data processed increases each year, both in largescale systems and in smaller environments. Likewise, the computation is being performed for processing the data, and the communication is made to distribute the data. This phenomenon is associated with a steady increase in computing power, storage and communication resources available, although with different characteristics. The impact of the current growth in the use of virtualization tools became more popular the use of virtual machines. The use of virtual laboratoriestesting is becoming more popular in the practice of QA testing. This approach allows the "testers" to test different applications without relying on permanent configuration of a system. Using virtual machines, QA tests can simulate different computers with different operating systems through a single physical computer or create a full virtual laboratory with multiple virtual machines configured differently. These virtual "computers" operate independently of each other and we can launch two or more virtual platforms simultaneously on one computer, saving the cost of having to buy more hardware just to run quality control tests. Applications running in a virtual machine behave as if they were running on its own physical system. This can also be useful to test web applications, because it can simultaneously test web applications across browsers which work independently of each other in different virtual machines, again, without the cost of buying more hardware for testing needs. Testing applications with virtual machines may have different utilities. This can be used for distributed client-server applications, functional testing, regression test, etc. But no matter what kind of QA testing we use, it will be more effective if automated and any kind of testing in virtual laboratories can be easily automated. A computer system is a dynamic system and configurations of operating systems continually change. Install or update software drivers and hardware happens frequently and installing different versions of an application affects the internal structure of the system and may influence the test results. While buying multiple computers to support multiple platforms is an option for some, it is often too expensive for most testing labs. Fortunately, virtual machines are a solution to these problems and much more cost effective. Once we have created and configured a virtual machine or a lab full of virtual machines, we can have the configuration of a stable system, which is very important when testing applications. However, we may need a more powerful computer to run multiple virtual machines on a single computer at the same time, but that's often cheaper than buying three physical computers. With a virtual laboratory in a computer, we can perform tests with distributed client-server applications without the need for multiple computers. In this dissertation, based on the characteristics presented above, is presented VirtualMigra. The VirtualMigra Platform is a tool that allows the migration of virtual machines regardless of their manufacturer among different users in a LAN. The use of the Oracle Virtualbox and VMware Workstation APIs allows a comfortable and intuitive level of abstraction for the users. Were conducted exhaustive experiments to test the platform and these were successfully performed in a real environment, thus being ready for real exploration platform.
A computação em nuvem tem melhorado a eficiência de computação reduzindo o custo para os utilizadores. Um centro de dados atual é constituído por dezenas a centenas de milhares de servidores e contém centenas de milhares de “switches” hierarquicamente conectados. Partilhando os recursos de processamento através de serviços como “Software as Service” (SaaS), os utilizadores podem amortizar o custo do hardware e do software. Para facilitar atualizações e manutenções de sistemas, as máquinas virtuais (VMs) são frequentemente utilizadas para prestação de serviços, e suas migrações resultam numa melhor utilização dos recursos. A computação em nuvem, apoiada pela virtualização está emergindo como um importante paradigma de serviço orientado. A administração de sistemas é fundamental para oferecer disponibilidade e desempenho em sistemas de dados, fornecendo de forma automatizada a capacidade necessária em tempo real para atender pedidos de serviços. Mas a virtualização não reduz a complexidade de um sistema. Na verdade, a execução de várias máquinas virtuais (VMs) no topo de uma infra-estrutura física pode aumentar a complexidade geral do sistema e colocar novos desafios na sua administração. A virtualização de recursos é a componente chave da computação em nuvem para fornecer serviços de computação e armazenamento estando omnipresente nos centros de dados atuais. O apoio à servidores através da construção de cluster de máquinas virtuais é universalmente adotada para maximizar a utilização dos recursos do hardware. A virtualização tornou-se uma tecnologia chave implementada por um número crescente de organizações relacionadas com as Tecnologias da Informação (TI) em todo o mundo. A virtualização de sistemas rapidamente ganhou popularidade por causa do seu potencial em reduzir os custos das TI´s. Permitindo aos gestores de TI aumentarem a utilização dos recursos físicos existentes e até mesmo reduzir o número de sistemas implementados. Esta consolidação ajuda reduzir os requisitos na gestão de hardware, reduzindo as necessidades de energia e refrigeração, e, assim, reduzindo os custos das TI´s em geral. Além disso, a implantação de soluções de virtualização normalmente significa um aumento de ferramentas de gestão para o ambiente existente. O acesso ao software e dados em qualquer lugar, a qualquer hora, em qualquer dispositivo e com qualquer conectividade, já há muito tempo é um tema crucial para investigadores e arquitectos de sistemas. A quantidade de dados processados aumenta em cada ano, tanto em sistemas de larga escala como em ambientes de menor dimensão. Da mesma forma, a computação mais está a ser executada para processar os dados, e mais comunicação é utilizada para distribuir os dados. Este fenómeno é associado com um aumento constante da capacidade de computação, armazenamento e recursos de comunicação disponíveis, embora com características diferentes. O impacto do crescimento actual do uso de ferramentas de virtualização tornou mais popular a utilização de máquinas virtuais. O uso de laboratórios de testes virtuais está-se a tornar mais popular na prática de testes de QA. Esta abordagem permite que os “testers” testem aplicações diferentes sem se basearem na configuração permanente de um sistema. Usando máquinas virtuais em testes de QA, podemos simular diferentes computadores com diferentes sistemas operativos através de único computador físico ou criar um laboratório virtual inteiro, com várias máquinas virtuais configuradas de forma diferente. Estes “computadores” virtuais funcionam de forma independente uns dos outros e podemos lançar duas ou mais plataformas virtuais simultaneamente no computador, economizando o custo de ter que comprar mais hardware apenas para executar testes de controlo de qualidade. As aplicações em execução numa máquina virtual comportam-se como se estivessem em execução no seu próprio sistema físico. Também pode ser útil testar aplicações web, pois pode-se testar simultaneamente aplicações web em vários navegadores que funcionam independentemente uns dos outros em diferentes máquinas virtuais, mais uma vez, sem o custo de comprar mais hardware para necessidades de testing. Testar aplicações com máquinas virtuais pode ter diferentes utilidades. Pode-se utilizar para testes distribuídos de aplicações cliente-servidor, testes funcionais, testes de regressão, etc. Mas, não importa que tipo de testes de QA que usamos, também será mais eficaz se for automatizado e qualquer tipo de testes em laboratórios virtuais podem ser facilmente automatizadas. Um sistema de informático é um sistema dinâmico e as configurações dos sistemas operativos mudam continuamente. Instalação ou atualização de drivers de software e hardware acontece com frequência e instalação de diferentes versões de um aplicativo afeta a estrutura interna do sistema, podendo influenciar os resultados dos testes. Enquanto que a compra de vários computadores para suportar várias plataformas é uma opção para alguns, muitas vezes é muito caro para a maioria dos laboratórios de testes. Felizmente, as máquinas virtuais são uma solução para estes problemas e a um custo muito mais eficaz. Depois de ter criado e configurado uma máquina virtual ou um laboratório cheio de máquinas virtuais, pode-se ter a configuração de um sistema estável, o que é muito importante ao testar aplicações. No entanto, pode ser preciso um computador mais potente para executar várias máquinas virtuais num único computador ao mesmo tempo, mas isso é muitas vezes mais barato do que comprar três ou mais computadores físicos. Com um laboratório virtual num computador, podemos executar testes distribuídos com aplicações cliente-servidor sem a necessidade de vários computadores. Nesta dissertação, com base nas características apresentadas anteriormente, é apresentada VirtualMigra. A plataforma VirtualMigra é uma ferramenta que permite fazer a migração de máquinas virtuais independentemente do seu fabricante entre diferentes utilizadores de uma LAN.O uso das API´s do Oracle Virtualbox e do VMware Workstation permitem um confortável e intuitivo nível de abstracção para os utilizadores. Realizaram-se experiências exaustivas para testar a plataforma e estas foram realizadas com sucesso num ambiente real, estando assim a plataforma pronta para exploração real.

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Chen, Pei-Sheng y 陳沛昇. "A Mobile Centered and Web Service Integrated Approach for Legacy Web Migration". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/26376921778951998526.

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碩士
逢甲大學
資訊工程學系
101
With the rapidly development of mobile devices coupled with the mature of mobile internet environment in recent years, there are more and more users using mobile device to browse the internet. However, most of the web pages on the internet are not mobile web pages, it is not easy for users to browse the traditional web page with mobile device. For example, the display of traditional web page on the mobile device would be mass and crowd. In order to solve these problems, most of the developers would design a new mobile website for mobile device. Nevertheless, developing new web site would cost unnecessarily human resources. In this thesis, we propose a half-automatic and web service integrated method to migrate the traditional web page into mobile device. In our method, we use two techniques, which are “Web Page Parsing” and “Web Service Integrated” when migrate the traditional web sites. Developer use our method can migrate traditional web page into mobile device by a few steps and output a mobile page with good layout and web service integrated. To validate our approach, we apply our method to two web sites, migrate them into mobile web page.

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Libros sobre el tema "Services Web – Migration"

Nadon, Jason. Website Hosting and Migration with Amazon Web Services. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9.

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Vasfi, Gucer y International Business Machines Corporation. International Technical Support Organization., eds. IBM Tivoli configuration manager and Tivoli provisioning manager for software coexistence and migration considerations. [Poughkeepsie, NY]: International Technical Support Organization, 2007.

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International Business Machines Corporation. International Technical Support Organization, ed. IBM Tivoli configuration manager and Tivoli provisioning manager for software coexistence and migration considerations. [Poughkeepsie, NY]: International Technical Support Organization, 2007.

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Barry, Baker y International Business Machines Corporation. International Technical Support Organization., eds. z/TPF and Websphere application server in a service oriented architecture. [United States?]: IBM, International Technical Support Organization, 2007.

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Linton, Rob. Amazon web services: Migrating your .NET enterprise application. Birmingham: Packt Publishing, 2011.

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Cheng shi liu dong ren kou jia ting de she hui fu wu xu qiu yan jiu: Yi Shanghai Shi wei li. Beijing Shi: Ren min chu ban she, 2018.

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Xin xing he zuo ji zhi de tan suo: Yi Ningbo Shi nong min gong she hui bao zhang shi jian wei li = An exploration of new mechanisms for cooperation. Shanghai: Shanghai ren min chu ban she, 2009.

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Cong mang liu dao chan ye gong ren: Nong min gong wen ti yu he xie she hui jian she yan jiu = Congmangliudaochayegongren. Nanchang Shi: Jiangxi ren min chu ban she, 2011.

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Perkins, Benjamin. Windows Azure and ASP.NET MVC Migration. Wrox, 2013.

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Perkins, Benjamin. Windows Azure and ASP. NET MVC Migration. Wiley & Sons, Incorporated, John, 2013.

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Capítulos de libros sobre el tema "Services Web – Migration"

Nacer, Hassina, Kada Beghdad Bey y Nabil Djebari. "Migration from Web Services to Cloud Services". En Ubiquitous Networking, 179–92. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68179-5_16.

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Nadon, Jason. "Database Services in AWS". En Website Hosting and Migration with Amazon Web Services, 127–51. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_10.

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Nadon, Jason. "Extending Your Reach with Workflow Services and Development Tools". En Website Hosting and Migration with Amazon Web Services, 213–23. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_17.

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Nadon, Jason. "Static Content Scenario". En Website Hosting and Migration with Amazon Web Services, 3–5. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_1.

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Nadon, Jason. "Building the Infrastructure". En Website Hosting and Migration with Amazon Web Services, 153–66. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_11.

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Nadon, Jason. "Updating the Stack". En Website Hosting and Migration with Amazon Web Services, 167–78. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_12.

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Nadon, Jason. "Building Upon Your Foundation". En Website Hosting and Migration with Amazon Web Services, 181–84. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_13.

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Nadon, Jason. "Enterprise Website Scenario". En Website Hosting and Migration with Amazon Web Services, 185–88. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_14.

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Nadon, Jason. "EC2 Resources at Scale". En Website Hosting and Migration with Amazon Web Services, 189–202. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_15.

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Nadon, Jason. "Content Lifecycles, Management, and Backup". En Website Hosting and Migration with Amazon Web Services, 203–12. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2589-9_16.

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Actas de conferencias sobre el tema "Services Web – Migration"

Zhang, Jia, Jen-Yao Chung y Carl K. Chang. "Migration to web services oriented architecture". En the 2004 ACM symposium. New York, New York, USA: ACM Press, 2004. http://dx.doi.org/10.1145/967900.968225.

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Upadhyaya, Bipin, Ying Zou, Hua Xiao, Joanna Ng y Alex Lau. "Migration of SOAP-based services to RESTful services". En 2011 13th IEEE International Symposium on Web Systems Evolution (WSE). IEEE, 2011. http://dx.doi.org/10.1109/wse.2011.6081828.

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Palmeira da Silva, Clay y Nizar Messai. "Beyond Traditional Web Technologies for Locally Web-Services Migration". En 18th International Conference on Software Technologies. SCITEPRESS - Science and Technology Publications, 2023. http://dx.doi.org/10.5220/0012133100003538.

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Kazzaz, M. Mohanned y Marek Rychly. "Restful-Based Mobile Web Service Migration Framework". En 2017 IEEE International Conference on AI & Mobile Services (AIMS). IEEE, 2017. http://dx.doi.org/10.1109/aims.2017.18.

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Hu, Guangchang, Budan Wu, Bo Cheng y Junliang Chen. "A Service Migration Mechanism for Web Service Discovery". En 2014 IEEE International Conference on Services Computing (SCC). IEEE, 2014. http://dx.doi.org/10.1109/scc.2014.124.

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Lihua Zheng y Shuang Wu. "An infrastructure for web services migration in clouds". En 2010 International Conference on Computer Application and System Modeling (ICCASM 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccasm.2010.5622664.

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Saadaoui, Alaeddine y Stephen L. Scott. "Lightweight Web Services Migration Framework in Hybrid Clouds". En 2018 IEEE 4th International Conference on Collaboration and Internet Computing (CIC). IEEE, 2018. http://dx.doi.org/10.1109/cic.2018.00025.

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Kazzaz, M. Mohanned y Marek Rychly. "Web Service Migration Using the Analytic Hierarchy Process". En 2015 IEEE International Conference on Mobile Services (MS). IEEE, 2015. http://dx.doi.org/10.1109/mobserv.2015.64.

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Ma, K. J. y R. Bartos. "Performance impact of Web service migration in embedded environments". En IEEE International Conference on Web Services (ICWS'05). IEEE, 2005. http://dx.doi.org/10.1109/icws.2005.91.

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Kim, Yeon-Seok y Kyong-Ho Lee. "An Efficient Policy Establishment Scheme for Web Services Migration". En 2007 International Conference on Convergence Information Technology (ICCIT 2007). IEEE, 2007. http://dx.doi.org/10.1109/iccit.2007.358.

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Informes sobre el tema "Services Web – Migration"

Bakhtiar, M. Mehrab, Abu Sonchoy, Muhammad Meki y Simon Quinn. Virtual Migration through Online Freelancing: Evidence from Bangladesh. Digital Pathways at Oxford, agosto de 2021. http://dx.doi.org/10.35489/bsg-dp-wp_2021/03.

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Youth unemployment is a major issue in many developing countries, particularly in locations not well connected with large urban markets. A limited number of available job opportunities in urban centres may reduce the benefit of policies that encourage rural–urban migration. In this project, we investigated the feasibility of ‘virtual migration’, by training rural youth in Bangladesh to become online freelancers, enabling them to export their labour services to a global online marketplace. We did this by setting up a ‘freelancing incubator’, which provided the necessary workspace and infrastructure – specifically, high-speed internet connectivity and computers. Close mentoring was also provided to participants to assist in navigating the competitive online marketplace. We show the exciting potential of online work for improving the incomes of poor youth in developing countries. We also highlight the constraints to this type of work: financing constraints for the high training cost, access to the necessary work infrastructure, and soft skills requirements to succeed in the market. We also shed light on some promising possibilities for innovative financial contracts and for ‘freelancing incubators’ or ‘virtual exporting companies’ to assist students in their sourcing of work and skills development.

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Bulatetska, Lesya V., Vitaliy V. Bulatetskyi, Tetyana O. Hryshanovych, Yulia S. Pavlenko, Tetyana I. Cheprasova y Andrey V. Pikilnyak. Operation system features and cloud services for lecturer work. [б. в.], junio de 2021. http://dx.doi.org/10.31812/123456789/4443.

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The work proposes a conception of setup and use of teacher’s or lecturer’s workspace using common software and hardware products. The research object is a system built by using operating system capabilities in conjunction with office suite and public cloud service, as a foundation for teacher’s digital workspace. Research is made on how to set up, scale, and operate such a system, by studying the experience of national and foreign scientists and teachers, and using our own experience in educational processes, and working with operating systems and cloud services. As a result, we got a system which is easy to set up, learn, and apply by teachers without significant experience working remote education systems, and could be used for initial learning of remote education principles. It could be used as an initial step before migrating to specialized remote education systems. In the future, the system itself could be improved by adding additional objects into the system and a higher integration level between objects and external subjects.

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Gu, Yuanyuan y Jhorland Ayala-García. Emigration and Tax Revenue. Banco de la República de Colombia, julio de 2022. http://dx.doi.org/10.32468/dtseru.312.

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According to the World Migration Report 2020, the number of international migrants increased from 84 million in 1970 to 272 million in 2019, accounting for 3.5% of the world’s population. This paper investigates the aggregated effect of emigration on the tax revenue of sending countries with a focus on developing nations. Using a gravity approach, we construct a time-varying exogenous instrument out of geographic time-invariant dyadic characteristics that allow us to estimate the predicted emigration rate for every country. Then, we follow an instrumental variable approach where we use our predicted emigration rate as an instrument of the observed migration rate. The results show that the predicted emigration rate is a good instrument of the current emigration rate for developing countries, and that there is a positive aggregated effect of emigration on tax revenue of sending countries. The results vary depending on the type of tax: emigration increases goods and services tax revenue, but it decreases income, profit, and capital gains tax revenue.

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Czajkowski, Jeffrey, Kelly Edmiston, Hanchun Zhang, Rodney Cornish, Eric Kolchinsky, Timothy Nauheimer, Dimitri Nikas y Michelle Lee Wong. Can insurance company investments help fill the infrastructure gap? Center for Insurance Policy and Research, septiembre de 2021. http://dx.doi.org/10.52227/24791.2021.

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The report emphasizes that evaluating the suitability of infrastructure investments for insurance companies cannot compromise the core mission of insurance regulators to preserve the solvency of regulated insurance companies and to protect policyholders. Significant Findings in the Report Include: The report offers a uniform definition of infrastructure that could be used as a basis for discussions around financial investments in infrastructure within the insurance industry: generally, economic infrastructure is long-lived, capital-intensive, large physical assets that provide essential services or facilities to some jurisdiction. Using NAIC data, as well as other supplemental sources, findings estimate total U.S. insurance industry exposure to economic infrastructure to be roughly $570.5 billion by NAIC's definition. Infrastructure investments have many qualities that should be appealing to insurers, potentially well-positioning them to make additional infrastructure investments under the right circumstances. For example, historical performance data from S&P Global Ratings and Moody's Investors Services show that: municipal bonds backing infrastructure outperform infrastructure bonds issued outside of the public sector. corporate infrastructure debt outperforms all non-financial corporate debt (which includes infrastructure). Superior performance is evident across the performance metrics we assessed, including default rates, recovery rates given default, and rating migration.

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Cerda, Maikol, David Cervantes, Paul Gertler, Sean Higgins, Ana María Montoya, Eric Parrado, Carlos Serrano, Raimundo Undurraga y Patricia Yáñez-Pagans. Covid-19 Pandemic and SMEs' Performance in Latin America. Inter-American Development Bank, febrero de 2023. http://dx.doi.org/10.18235/0004720.

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The COVID-19 pandemic generated a large negative external shock to the global economy. Businesses worldwide were affected by economic, health, and mobility restrictions that impacted consumers ability to access goods and services and firms profitability and survival rates. In this paper, we study the economic performance of Latin American MSMEs during the pandemic using disaggregated and high-frequency administrative banking deposits and income data from Brazil, Chile, Colombia, Mexico, Paraguay, and Peru. We observe a sharp short-term decline in firm earnings due to the implementation of lockdowns during the second half of March 2020. We show this decline had a heterogeneous impact by economic sector, firm size, and transaction type (in-person vs. online). Focusing on financial technology adoption by studying the migration from in-person to online banking transactions, we find that MSMEs managed to recover revenues to pre-pandemic levels in early 2021 thanks to an increased share of online transactions and that industries facing higher physical exposure to the public (e.g., retailers) experienced a more considerable decline and a slower recovery.

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Szałańska, Justyna, Justyna Gać, Ewa Jastrzębska, Paweł Kubicki, Paulina Legutko-Kobus, Marta Pachocka, Joanna Zuzanna Popławska y Dominik Wach. Country report: Poland. Welcoming spaces in relation to social wellbeing, economic viability and political stability in shrinking regions. Welcoming Spaces Consortium, diciembre de 2022. http://dx.doi.org/10.33119/welcoming_spaces_2022.

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This report aims to present findings of the research conducted in Poland within the Work Package 1 of the Welcoming Spaces project, namely “Welcoming spaces” in relation to economic viability, social wellbeing and political stability in shrinking regions. The main aim of the mentioned research was to examine how welcoming initiatives are organised and implemented in the selected shrinking localities in Poland. In particular, the creation of welcoming initiatives concerning social wellbeing, economic viability and political stability was assessed. To accomplish this objective, five localities were selected purposefully, namely Łomża (city with powiat status) and Zambrów (urban commune) in Podlaskie Voivodeship and Łuków (town), Wohyń (rural commune) and Zalesie (rural commune) in Lubelskie Voivodeship. Within these localities, 23 welcoming initiatives were identified, out of which 12 were chosen for in-depth research. The field research was conducted in all five localities between March and December 2021. During this period, the SGH Warsaw School of Economics team conducted 43 interviews with institutional stakeholders (representatives of local governments, schools, non-governmental organisations – NGOs, religious organisations and private companies) and individuals (both migrant newcomers and native residents). In addition, local government representatives were surveyed to compare their policies, measures and stances toward migrant inhabitants and local development. The research was also complemented with the literature review, policy documents analysis, and local media outlets discourse analysis. Until February 2022 and the outbreak of war in Ukraine, welcoming spaces in Poland were scarce and spatially limited to the big cities like Warsaw, Cracow, Wrocław, Gdańsk, Lublin or Białystok, governed by liberal mayors and city councils open to accept migrants and treat them as a valuable human asset of the city community. However, in smaller cities, towns and rural areas, especially in shrinking regions, welcoming spaces have been highly conditioned by welcoming initiatives carried out mainly by civil society organisations (CSOs). It is very likely that the war in Ukraine will completely change the situation we write about in this country report. However, this crisis and its consequences were not the subjects of our desk research and fieldwork in Poland, which ended in December 2021. As of late July 2022, the number of border crossings from Ukraine to Poland is almost 5 million and the number of forced migrants registered for temporary protection or similar national protection scheme concern 1.3 million people (UNHCR 2022). However, the number of those who have decided to stay in Poland is estimated at around 1.5 million (Duszczyk and Kaczmarczyk 2022). Such a large influx of forced migrants from Ukraine within five months already affects the demographic situation in the country and access to public services, mainly in large and medium-size cities1 . Depending on the development of events in Ukraine and the number of migrants who will decide to stay in Poland in the following months, the functioning of the domestic labour market, education, health service, and social assistance may significantly change. The following months may also bring new changes in the law relating to foreigners, aimed at their easier integration in the country. Access to housing in cities is already a considerable challenge, which may result in measures to encourage foreigners to settle in smaller towns and rural areas. Given these dynamic changes in the migration situation of the country, as well as in the area of admission and integration activities, Poland seems to be slowly becoming one great welcoming space. It is worth mentioning that the main institutional actors in this area have been NGOs and local governments since the beginning of the humanitarian crisis in Ukraine. An important supporting and coordinating role has also been played by international organisations such as the United Nations High Commissioner for Refugees (UNHCR), which launched its inter-agency Regional Refugee Response Plan (RRRP) in early spring to address the most urgent needs of the population of forced migrants and their host countries in this part of Europe (UNHCR 2022a; UNHCR 2022b; UNHCR 2022c). Based on the number of newly emerged welcoming initiatives and the pace of this emergence, they will soon become an everyday reality for every municipality in Poland. Therefore, it is difficult to find more up-todate circumstances for the “Welcoming Spaces” project objective, which is “to rethink ways forward in creating inclusive space in such a way that it will contribute firstly to the successful integration of migrants in demographically and economically shrinking areas and simultaneously to the revitalization of these places”. Furthermore, the initiatives we selected as case studies for our research should be widely promoted and treated as a model of migrants’ inclusion into the new communities. On the other hand, we need to emphasize here that the empirical material was collected between March and December 2021, before the outbreak of war in Ukraine. As such, it does not reflect the new reality in Poland

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