Shopping Cart System: Load Balancing and Fault Tolerance in the OSGi Service Platform

The main purpose of this paper was to find a simple solution for load balancing and fault tolerance in OSGi. The challenge was to implement a highly available web application such as a shopping cart system with load balancing and fault tolerance, without having to change the core of OSGi.

Bolton College: Improve your service platform

In 2013 Bolton College’s senior management team began to take a fresh look at its information and learning technology (ILT) and explore new ways to deliver more choice, provide tailored support for learners and achieve business efficiencies.

User Profile Management and Selection in Context-Aware Service Platforms for Networks Beyond 3G

In recent years, progress in the area of mobile telecommunications has changed our way of life, in the private as well as the business domain. Mobile and wireless networks have ever increasing bit rates, mobile network operators provide more and more services, and at the same time costs for the usage of mobile services and bit rates are decreasing. However, mobile services today still lack functions that seamlessly integrate into users’ everyday life. That is, service attributes such as context-awareness and personalisation are often either proprietary, limited or not available at all. In order to overcome this deficiency, telecommunications companies are heavily engaged in the research and development of service platforms for networks beyond 3G for the provisioning of innovative mobile services. These service platforms are to support such service attributes. Service platforms are to provide basic service-independent functions such as billing, identity management, context management, user profile management, etc. Instead of developing own solutions, developers of end-user services such as innovative messaging services or location-based services can utilise the platform-side functions for their own purposes. In doing so, the platform-side support for such functions takes away complexity, development time and development costs from service developers. Context-awareness and personalisation are two of the most important aspects of service platforms in telecommunications environments. The combination of context-awareness and personalisation features can also be described as situation-dependent personalisation of services. The support for this feature requires several processing steps. The focus of this doctoral thesis is on the processing step, in which the user’s current context is matched against situation-dependent user preferences to find the matching user preferences for the current user’s situation. However, to achieve this, a user profile management system and corresponding functionality is required. These parts are also covered by this thesis. Altogether, this thesis provides the following contributions: The first part of the contribution is mainly architecture-oriented. First and foremost, we provide a user profile management system that addresses the specific requirements of service platforms in telecommunications environments. In particular, the user profile management system has to deal with situation-specific user preferences and with user information for various services. In order to structure the user information, we also propose a user profile structure and the corresponding user profile ontology as part of an ontology infrastructure in a service platform. The second part of the contribution is the selection mechanism for finding matching situation-dependent user preferences for the personalisation of services. This functionality is provided as a sub-module of the user profile management system. Contrary to existing solutions, our selection mechanism is based on ontology reasoning. This mechanism is evaluated in terms of runtime performance and in terms of supported functionality compared to other approaches. The results of the evaluation show the benefits and the drawbacks of ontology modelling and ontology reasoning in practical applications.

Platform Privacy: The Missing Piece of Data Protection Legislation

After years of deliberation, the EU commission sped up the reform process of a common EU digital policy considerably in 2015 by launching the EU digital single market strategy. In particular, two core initiatives of the strategy were agreed upon: General Data Protection Regulation and the Network and Information Security (NIS) Directive law texts. A new initiative was additionally launched addressing the role of online platforms. This paper focuses on the platform privacy rationale behind the data protection legislation, primarily based on the proposal for a new EU wide General Data Protection Regulation. We analyse the legislation rationale from an Information System perspective to understand the role user data plays in creating platforms that we identify as “processing silos”. Generative digital infrastructure theories are used to explain the innovative mechanisms that are thought to govern the notion of digitalization and successful business models that are affected by digitalization. We foresee continued judicial data protection challenges with the now proposed Regulation as the adoption of the “Internet of Things” continues. The findings of this paper illustrate that many of the existing issues can be addressed through legislation from a platform perspective. We conclude by proposing three modifications to the governing rationale, which would not only improve platform privacy for the data subject, but also entrepreneurial efforts in developing intelligent service platforms. The first modification is aimed at improving service differentiation on platforms by lessening the ability of incumbent global actors to lock-in the user base to their service/platform. The second modification posits limiting the current unwanted tracking ability of syndicates, by separation of authentication and data store services from any processing entity. Thirdly, we propose a change in terms of how security and data protection policies are reviewed, suggesting a third party auditing procedure.

电子商务服务平台Easy-eBiz的设计与实现

电子商务服务平台是电子商务业务逻辑发布和运行的网络平台。介绍了一个电子商务服务平台Easy-eB iz的设计与实现,它使用J2EE技术实现让电子商务业务逻辑运行的底层服务。在设计中采用了组件化的设计思想和模式化的设计方式,使用了单点登录技术,大大提高了设计效率、系统稳定性、可靠性和可重用性。

A Scheme Design of Cloud + End Technology in Demand Side Management

Demand Side Management (DSM) plays an important role in Smart Grid. It has large scale access points, massive users, heterogeneous infrastructure and dispersive participants. Moreover, cloud computing which is a service model is characterized by resource on-demand, high reliability and large scale integration and so on and the game theory is a useful tool to the dynamic economic phenomena. In this study, a scheme design of cloud + end technology is proposed to solve technical and economic problems of the DSM. The architecture of cloud + end is designed to solve technical problems in the DSM. In particular, a construct model of cloud + end is presented to solve economic problems in the DSM based on game theories. The proposed method is tested on a DSM cloud + end public service system construction in a city of southern China. The results demonstrate the feasibility of these integrated solutions which can provide a reference for the popularization and application of the DSM in china.

Optimização de recursos para difusão em redes de próxima geração

Esta tese aborda o problema de optimização de recursos de rede, na entrega de Serviços de Comunicação em Grupo, em Redes de Próxima Geração que suportem tecnologias de difusão. De acordo com esta problemática, são feitas propostas que levam em atenção a evolução espectável das redes 3G em Redes Heterogéneas de Próxima Geração que incluam tecnologias de difusão tais como o DVB. A optimização de recursos em Comunicações em Grupo é apresentada como um desafio vertical que deve cruzar diversas camadas. As optimizações aqui propostas cobrem tanto a interface entre Aplicação e a Plataforma de Serviços para a disponibilização de serviços de comunicação em grupo, como as abstracções e mapeamentos feitos na interface entre a Rede Central e a Rede de Acesso Rádio. As optimizações propostas nesta tese, assumem que o caminho evolutivo na direcção de uma Rede de Próxima Geração é feito através do IP. Em primeiro lugar são endereçadas as optimizações entre a Aplicação e a Plataforma de Serviços que já podem ser integradas nas redes 3G existentes. Estas optimizações podem potenciar o desenvolvimento de novas e inovadoras aplicações, que através do uso de mecanismos de distribuição em difusão podem fazer um uso mais eficiente dos recursos de rede. De seguida são apresentadas optimizações ao nível da interface entre a Rede Central e a Rede de Acesso Rádio que abordam a heterogeneidade das redes futuras assim como a necessidade de suportar tecnologias de difusão. É ainda considerada a possibilidade de aumentar a qualidade de serviço de serviços de difusão através do mapeamento do IP multicast em portadoras unidireccionais. Por forma a validar todas estas optimizações, vários protótipos foram desenvolvidos com base num router avançado para redes de acesso de próxima geração. As funcionalidades e arquitectura de software desse router são também aqui apresentadas.

Improving Speech Interaction in Vehicles Using Context-Aware Information through A SCXML Framework

Speech Technologies can provide important benefits for the development of more usable and safe in-vehicle human-machine interactive systems (HMIs). However mainly due robustness issues, the use of spoken interaction can entail important distractions to the driver. In this challenging scenario, while speech technologies are evolving, further research is necessary to explore how they can be complemented with both other modalities (multimodality) and information from the increasing number of available sensors (context-awareness). The perceived quality of speech technologies can significantly be increased by implementing such policies, which simply try to make the best use of all the available resources; and the in vehicle scenario is an excellent test-bed for this kind of initiatives. In this contribution we propose an event-based HMI design framework which combines context modelling and multimodal interaction using a W3C XML language known as SCXML. SCXML provides a general process control mechanism that is being considered by W3C to improve both voice interaction (VoiceXML) and multimodal interaction (MMI). In our approach we try to anticipate and extend these initiatives presenting a flexible SCXML-based approach for the design of a wide range of multimodal context-aware HMI in-vehicle interfaces. The proposed framework for HMI design and specification has been implemented in an automotive OSGi service platform, and it is being used and tested in the Spanish research project MARTA for the development of several in-vehicle interactive applications.

MPEG-M: A Digital Media Ecosystem for Interoperable Applications

MPEG-M is a suite of ISO/IEC standards (ISO/IEC 23006) that has been developed under the auspices of Moving Picture Experts Group (MPEG). MPEG-M, also known as Multimedia Service Platform Technologies (MSPT), facilitates a collection of multimedia middleware APIs and elementary services as well as service aggregation so that service providers can offer users a plethora of innovative services by extending current IPTV technology toward the seamless integration of personal content creation and distribution, e-commerce, social networks and Internet distribution of digital media.

Análisis, diseño e implementación de un SDK híbrido basado en tecnologías web para la integración de clientes contra una plataforma de servicios RESTFul/JSON

En el departamento de Ocio Digital de bq se desarrollan multitud de proyectos con diferentes modelos de negocio y diferentes stack tecnológicos. Para llevar a cabo todos estos proyectos, es necesario tener un ecosistema de desarrollo lo más unificado y centralizado posible. Por eso, en el departamento existe una plataforma genérica de servicios REST sobre la que se apoyan todos los aplicativos desarrollados. Para agilizar y facilitar la integración de los aplicativos con la plataforma de servicios,se desarrolla este SDK (Software Development Kit) basado en JavaScript llamado corbel-js. Este SDK ha de funcionar tanto en aplicaciones web, como en un middleware basado en node.js desarrollado también en la organización, por lo que el SDK se ha desarrollado de forma híbrida, siendo capaz de ejecutarse tanto en en el lado del cliente, como en el lado del servidor. Además, como parte de la filosofía del departamento, el desarrollo del SDK está basado en tecnologías Open Source, usando metodologías ágiles de desarrollo y un sistema de integración continua y revisión de código, garantizando la calidad del mismo. ABSTRACT A lot of different kinds of software projects are developed in the digital department of bq. To easily develop all of these projects, each one with its own business model and technology stack, it is necessary to have an unique software ecosystem. Because of that, in the software department a generic service REST platform has been developed. To support an easy integration of the applications with the service platform of the organization, this SDK(Software Development Kit) has been developed in JavaScript. As the SDK has to run under a web application and under a software middleware based in node.js, also developed in the organization, the SDK is hybrid, being capable of run inside a web client application or inside a node.js application server. As a part of the software philosophy of the department, the development of the SDK is made with a whole open source software stack, using agile software methodologies.

Regulación y marcos de trabajo para la gestión de sistemas de Tecnologías de la Información

En la actualidad, a través de los sistemas de Tecnologías de la Información (TI) se ofrecen servicios muy diversos que tienen requisitos cada vez más específicos para garantizar su funcionamiento. Con el fin de cumplir dichas garantías, se han estandarizado diferentes normativas, así como marcos de trabajo, también llamadas recomendaciones o manuales de buenas prácticas, que permiten al proveedor de servicios verificar que se cumplen dichos requisitos y ofrecer tanto al cliente final como a la propia organización un servicio de calidad que permita generar valora todas las partes. Con la aplicación de dichas recomendaciones y normativas, las empresas y Administraciones Públicas garantizan que los servicios telemáticos que ofrecen, cumplen estándares de calidad permitiendo así ofrecer al usuario final una plataforma estable y adecuada al servicio prestado. Dichas normas y marcos hacen referencia tanto al servicio TI propiamente dicho como al propio sistema de gestión del servicio TI, de tal forma que, a través de una operación adecuada del sistema que gestiona el servicio, podemos hacer que dicho servicio esté continuamente mejorando. En concreto nos centramos en la norma más empleada, ISO 20000, y en el marco de trabajo o referencia de buenas prácticas, ITIL 2011, con el fin de dar una visión clara de los diferentes procesos, actividades y funciones que ambas definen para generar valor en la empresa a través de los sistemas de TI. Con el fin de ayudar a la comprensión tanto de ITIL como de ISO 20000, se ha desarrollado a modo de ejemplo la implementación tanto de ITIL inicialmente y luego ISO 20000 sobre de un servicio que ya está en funcionamiento definiendo para cada una de las cinco fases del ciclo de vida que, tanto en la norma como en el marco se utilizan, los procesos y funciones necesarias para su implementación, y su posterior revisión. ABSTRACT. Today, we’ve got a lot of different services thanks to Information Technologies (IT) service management: they have increasingly specific requirements to ensure a good operation on the service they support. In order to meet these requirements, it has been released different standardized regulations and frameworks, also called recommendations or good practice guides. They allow the service provider to verify that such requirements are met and offer both to the end customer and to the own organization that manage this system, a quality service that will generate value to both parts. In the end, with the implementation of these recommendations and regulations, companies and public authorities ensure that the telematics services offered meet the quality standards they seek, allowing the end user to offer a stable and appropriate service platform. So these standards and reference frames both implies on the IT service itself and on the IT service management, so that, through proper operation of the parts implied on the process that manages the service, we can offer a better service. In particular we focus on the most widely used standard, ISO 20000, and the reference framework or best practices, ITIL 2011, in order to give a clear overview of the different processes, activities and functions that define both to create value in the company through IT service management. To help the understanding of both ITIL and ISO 20000, it has been developed an example of an ITIL and then ISO 20000 implementation on a service that is already in operation defining for each of the five phases of the life cycle, both in the standard as used in the context, processes and functions necessary for its implementation, and later review.

We know what you want to buy:a demographic-based system for product recommendation on microblogs

Product recommender systems are often deployed by e-commerce websites to improve user experience and increase sales. However, recommendation is limited by the product information hosted in those e-commerce sites and is only triggered when users are performing e-commerce activities. In this paper, we develop a novel product recommender system called METIS, a MErchanT Intelligence recommender System, which detects users' purchase intents from their microblogs in near real-time and makes product recommendation based on matching the users' demographic information extracted from their public profiles with product demographics learned from microblogs and online reviews. METIS distinguishes itself from traditional product recommender systems in the following aspects: 1) METIS was developed based on a microblogging service platform. As such, it is not limited by the information available in any specific e-commerce website. In addition, METIS is able to track users' purchase intents in near real-time and make recommendations accordingly. 2) In METIS, product recommendation is framed as a learning to rank problem. Users' characteristics extracted from their public profiles in microblogs and products' demographics learned from both online product reviews and microblogs are fed into learning to rank algorithms for product recommendation. We have evaluated our system in a large dataset crawled from Sina Weibo. The experimental results have verified the feasibility and effectiveness of our system. We have also made a demo version of our system publicly available and have implemented a live system which allows registered users to receive recommendations in real time. © 2014 ACM.

Design of Streaming Media Panoramic Video System Based on WebGL

2016 is the outbreak year of the virtual reality industry. In the field of virtual reality, 3D surveying plays an important role. Nowadays, 3D surveying technology has received increasing attention. This project aims to establish and optimize a WebGL three-dimensional broadcast platform combined with streaming media technology. It takes streaming media server and panoramic video broadcast in browser as the application background. Simultaneously, it discusses about the architecture from streaming media server to panoramic media player and analyzing relevant theory problem. This paper focuses on the debugging of streaming media platform, the structure of WebGL player environment, different types of ball model analysis, and the 3D mapping technology. The main work contains the following points: Initially, relay on Easy Darwin open source streaming media server, built a streaming service platform. It can realize the transmission from RTSP stream to streaming media server, and forwards HLS slice video to clients; Then, wrote a WebGL panoramic video player based on Three.js lib with JQuery browser playback controls. Set up a HTML5 panoramic video player; Next, analyzed the latitude and longitude sphere model which from Three.js library according to WebGL rendering method. Pointed out the drawbacks of this model and the breakthrough point of improvement; After that, on the basis of Schneider transform principle, established the Schneider sphere projection model, and converted the output OBJ file to JS file for media player reading. Finally implemented real time panoramic video high precision playing without plugin; At last, I summarized the whole project. Put forward the direction of future optimization and extensible market.