As network uses increase rapidly and high quality-of-service (QoS) is required, efficient network managing methods become important. Many previous studies and commercial tools of network management systems such as tcpdump, Ethereal, and other applications have weaknesses: limited size of files, command line execution, and large memory and huge computational power requirement. Researchers struggle to find fast and effective analyzing methods to save maintenance budgets and recover from systematic problems caused by the rapid increment of network traffic or intrusions. The main objective of this study is to propose an approach to deal with a large amount of network behaviors being quickly and efficiently analyzed. We study an ontology/data engineering methodology based network analysis system. We design a behavior, which represents network traffic activity and network packet information such as IP addresses, protocols, and packet length, based on the System Entity Structure (SES) methodology. A significant characteristic of SES, a hierarchical tree structure, enables systems to access network packet information quickly and efficiently. Also, presenting an automated system design is the secondary purpose of this study. Our approach shows adaptive awareness of pragmatic frames (contexts) and makes a network traffic analysis system with high throughput and a fast response time that is ready to respond to user applications. We build models and run simulations to evaluate specific purposes, i.e., analyzing network protocols use, evaluating network throughput, and examining intrusion detection algorithms, based on Discrete Event System Specification (DEVS) formalism. To study speed up, we apply a web-based distributed simulation methodology. DEVS/Service Oriented Architecture (DEVS/SOA) facilitates deploying workloads into multi-servers and consequently increasing overall system performance. In addition to the scalability limitations, both tcpdump and Ethereal have a security issue. As well as basic network traffic information, captured files by these tools contain secure information: user identification numbers and passwords. Therefore, captured files should not allow to be leaked out. However, network analyses need to be performed outside target networks in some cases. The distributed simulation--allocating distributing models inside networks and assigning analyzing models outside networks--also allows analysis of network behaviors out of networks while keeping important information secured.

Web services are pieces of software offering functionalities to other (remote) machines over the Internet that work based on the Service-Oriented Architecture (SOA). They can be invoked by means of Web related standards (usually, SOAP, UDDI, XML, HTTP, WSDL. In the recent years, the usage of Web services has increased due to the flexibility and interoperability among heterogeneous platforms and operative systems that they provide. SOA adds value in terms of low coupling, re-usability of services and sharing; it makes the systems flexible and adaptive in case of changes in the business process and improves the integration of heterogeneous systems. Besides, new ways of using Web services have emerged, by combining them in order to create more complete (and complex) services. This process of re-using and combining Web services is called Web service composition, and its main objective is to allow the re-usability of the functionalities proposed by the Web services. This is why this architecture has been widely accepted by the companies all over the world: it helps reducing the cost and time to create business processes, and this is the type of systems we work with in this thesis, more specifically, we aim at ensuring their correct behavior by using testing techniques in order to detect possible errors.

A new portable flow tube technique, the Toronto Photo-Oxidation Tube v2.0 was developed and characterized to explore its potential to control and monitor the OH-initiated formation and chemical aging of secondary organic aerosol (SOA) in-situ. The first study investigated the different operational parameters of this flow tube technique. TPOT v2.0 can generate oxidizing conditions equivalent to ambient OH exposures of 2.3 – 10.8 days. The transmission efficiency of a model organic aerosol indicated negligible losses in the oxidation tube. Differences in the residence time distribution curves measured for a gas and model organic aerosol showed that particles were subjected to approximately half of the OH exposure compared to gases. The second study examined the capacity of the TPOT technique to generate secondary aerosols due to OH oxidation. High aerosol yield was observed for H2SO4 particles, whereas a low aerosol yield was observed for α-pinene SOA.

A new portable flow tube technique, the Toronto Photo-Oxidation Tube v2.0 was developed and characterized to explore its potential to control and monitor the OH-initiated formation and chemical aging of secondary organic aerosol (SOA) in-situ. The first study investigated the different operational parameters of this flow tube technique. TPOT v2.0 can generate oxidizing conditions equivalent to ambient OH exposures of 2.3 – 10.8 days. The transmission efficiency of a model organic aerosol indicated negligible losses in the oxidation tube. Differences in the residence time distribution curves measured for a gas and model organic aerosol showed that particles were subjected to approximately half of the OH exposure compared to gases. The second study examined the capacity of the TPOT technique to generate secondary aerosols due to OH oxidation. High aerosol yield was observed for H2SO4 particles, whereas a low aerosol yield was observed for α-pinene SOA.

Corporations are actively pursuing business model innovation and organizational agility in the quest for sustainable competitive advantage in today??s global marketplace. The paradigm of service-oriented computing (SOC) has emerged as a popular approach to flexibility and agility, not just in systems development but also in business process management. The associated concept of service-oriented architecture (SOA) enables the defining of business flows as technology independent services, potentially providing avenues for agility in business process transformation. This architectural concept is growing in popularity and is being rapidly adopted by industry organizations. Studies of the practical impacts of adopting SOA are crucial because it involves a non-trivial and expensive overhaul of both business and technology infrastructures. There is, however, a paucity of critical research on the adoption of SOA. What is needed is a focus on the study of the real-world adoption of SOA across the enterprise and the factors that aid or impede such adoptions. This research examines the organizational use of SOA, both analytically and empirically through case studies, and posits a diffusion framework for the adoption and implementation of SOA as an enterprise strategy. The SOA Diffusion Framework addresses the following key areas ?? the organizational factors influencing the decision to adopt SOA, the organizational aspects of adopting and implementing SOA, and the outcomes or realized benefits of implementing SOA across the enterprise. For researchers, this study (i) fills a crucial knowledge gap because there is little empirical evidence of the practical use of SOA, (ii) adds to the innovation diffusion literature, (iii) introduces a tool to assess the organizational impact of SOA, and (iv) provides direction for future research into the organizational factors relating to the enterprise adoption of service-orientation. For practitioners, this study provides an adoption framework and a set of guidelines to help implement SOA successfully across the enterprise.

Corporations are actively pursuing business model innovation and organizational agility in the quest for sustainable competitive advantage in today??s global marketplace. The paradigm of service-oriented computing (SOC) has emerged as a popular approach to flexibility and agility, not just in systems development but also in business process management. The associated concept of service-oriented architecture (SOA) enables the defining of business flows as technology independent services, potentially providing avenues for agility in business process transformation. This architectural concept is growing in popularity and is being rapidly adopted by industry organizations. Studies of the practical impacts of adopting SOA are crucial because it involves a non-trivial and expensive overhaul of both business and technology infrastructures. There is, however, a paucity of critical research on the adoption of SOA. What is needed is a focus on the study of the real-world adoption of SOA across the enterprise and the factors that aid or impede such adoptions. This research examines the organizational use of SOA, both analytically and empirically through case studies, and posits a diffusion framework for the adoption and implementation of SOA as an enterprise strategy. The SOA Diffusion Framework addresses the following key areas ?? the organizational factors influencing the decision to adopt SOA, the organizational aspects of adopting and implementing SOA, and the outcomes or realized benefits of implementing SOA across the enterprise. For researchers, this study (i) fills a crucial knowledge gap because there is little empirical evidence of the practical use of SOA, (ii) adds to the innovation diffusion literature, (iii) introduces a tool to assess the organizational impact of SOA, and (iv) provides direction for future research into the organizational factors relating to the enterprise adoption of service-orientation. For practitioners, this study provides an adoption framework and a set of guidelines to help implement SOA successfully across the enterprise.

Doctor of Philosophy(PhD) / An exciting trend in enterprise computing lies in the integration of applications across an organisation and even between organisations. This allows the provision of services by automated business processes that coordinate business activity among several collaborating organisations. The best successes in this type of integrated distributed system come through use of Web Services and Service-based Architecture, which allow interoperation between applications through open standards based on XML and SOAP. But still, there are unresolved issues when developers seek to build a reliable and robust system. An important goal for the designers of a loosely coupled distributed system is to maintain consistency for each long running business process in the presence of failures and concurrent activities. Our approach to assist the developers in this domain is to guide the developers with the key principles they must consider, and to provide programming models and protocols, which make it easier to detect and avoid consistency faults in service-based system. We start by defining a realistic e-procurement scenario to illustrate the common problems faced by the developers which prevent them from building a reliable and robust system. These problems make it hard to maintain the consistency of the data and state during the execution of a business process in the occurrence of failures and interference from concurrent activities. Through the analysis of the common problems, we identify key principles the developers must consider to avoid producing the common problems. Then based on the key principles, we provide a framework called GAT in the orchestration infrastructure. GAT allows developers to express all the necessary processing to handle deviations including those due to failures and concurrent activities. We discuss the GAT framework in detail with its structure and key features. Using an example taken from part of the e-procurement case study, we illustrate how developers can use the framework to design their business requirements. We also discuss how key features of the new framework help the developers to avoid producing consistency faults. We illustrate how systems based on our framework can be built using today’s proven technology. Finally, we provide a unified isolation mechanism called Promises that is not only applicable to our GAT framework, but also to any applications that run in the service-based world. We discuss the concept, how it works, and how it defines a protocol. We also provide a list of potential implementation techniques. Using some of the implementation techniques we mention, we provide a proof-of-concept prototype system.

In the current manufacturing environment, characterized by diverse change sources (e.g. economical, technological, political, social) and integrated supply chains, success demands close cooperation and coordination between stakeholders and agility. Tools and systems based on software agents, intelligent products and virtual enterprises have been developed to achieve such demands but either because of: (i) focus on a single application; (ii) focus on a single product; (iii) separation between the product and its information; or (iv) focus on a single system characteristic (e.g. hardware, software, architecture, requirements) their use has been limited to trial or academic scenarios. In this thesis a reusable distributed manufacturing monitoring system for harsh environments, capable of addressing traceability and controllability requirements within stakeholders and across high cost and complexity supply chains is presented.

El principal objetivo de este trabajo de memoria es definir, especificar requerimientos y modelar todos los elementos, componentes, relaciones y dependencias que dan forma a una arquitectura SOA, para la capa VAS de una empresa de telefonía móvil. Sobre esta arquitectura, se definirá y planteará la estructura y organización necesaria para la implantación de un sistema BAM, de manera de cubrir las necesidades técnicas y de negocio que la arquitectura SOA no logra cubrir.

Tese (doutorado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2015. / Submitted by Albânia Cézar de Melo (albania@bce.unb.br) on 2016-02-18T15:35:49Z No. of bitstreams: 1 2015_ClaynorFernandoMazzarolo.pdf: 27658106 bytes, checksum: a845c062176dcbbfcd55e3b05d1e0985 (MD5) / Approved for entry into archive by Marília Freitas(marilia@bce.unb.br) on 2016-07-30T11:38:50Z (GMT) No. of bitstreams: 1 2015_ClaynorFernandoMazzarolo.pdf: 27658106 bytes, checksum: a845c062176dcbbfcd55e3b05d1e0985 (MD5) / Made available in DSpace on 2016-07-30T11:38:50Z (GMT). No. of bitstreams: 1 2015_ClaynorFernandoMazzarolo.pdf: 27658106 bytes, checksum: a845c062176dcbbfcd55e3b05d1e0985 (MD5) / Esta tese propõe um modelo para aferir e acompanhar a evolução do nível de maturidade na adoção de arquitetura orientada a serviços (SOA) nas organizações. O modelo é concebido por parametrização de base de conhecimento de melhores práticas, visando suportar a avaliação, o planejamento e o acompanhamento da evolução da maturidade organizacional. Sua concepção estende significativamente o modelo The Open Group Service Integration Maturity Model (OSIMM), de modo a permitir o monitoramento direto dos objetivos estratégicos de SOA (agilidade, redução de custos, interoperabilidade, padronização e alinhamento entre negócio e tecnologia) e de suas práticas fundamentais (ciclo de vida de serviços e aplicação dos princípios de projeto). O modelo proposto está dividido em sete domínios (negócio, organização e governança, métodos e práticas, aplicações e arquitetura, informação, tecnologia e infraestrutura, operação e gerenciamento). A avaliação é realizada de modo qualitativo e quantitativo, com aplicação dos conceitos de avaliação de maturidade definidos pelo Capability Maturity Model Integration (CMMI), com classificação, por domínio, em cinco níveis (inicial, gerenciado, definido, gerenciado e otimizado). O modelo proposto se distingue do CMMI por focar práticas e especificidades de orientação a serviços e, também, a representação da maturidade foi concebida para diferenciar seu nível se em evolução ou estabilização. A aplicação do modelo foi suportada por uma solução de software que disponibiliza os questionários eletrônicos da base de conhecimento e realiza classificação de maturidade através de um método heurístico próprio. O modelo apresentado foi empregado em estudo de caso em uma organização no Brasil, de modo a demonstrar a sua aplicabilidade prática. / This thesis presents a model for maturity assessment using Service Oriented Architecture (SOA). The model is designed through the parameterization of best practices knowledge base in order to support the continued evaluation, planning and monitoring of the organizational maturity’s evolution. Its concept significantly extends The Open Group Service Integration Maturity Model (OSIMM), allowing direct monitoring of SOA’s strategic goals (agility, cost reduction, interoperability, standardization and alignment between business and technology) and its fundamental practices (services lifecycle and design principles). The proposed model is divided into seven domains (business, organization and governance, methods and practices, applications and architecture, information technology and infrastructure, operation and management). The evaluation is carried out qualitatively and quantitatively, applying maturity assessment concepts defined by the Capability Maturity Model Integration (CMMI) which are classified, per domain, in five levels (initial, managed, defined, managed and optimizing). The proposed model distinguishes itself from CMMI by focusing on service orientation’s practices and specificities, and also on the maturity’s representation – which was conceived in order to differentiate its level, whether in evolution or stabilization. The application of the model is supported by a software system that provides the knowledge base’s electronic questionnaires and performs classification of maturity through its own heuristic method. In order to demonstrate its practical applicability, the presented model was employed in a case study within a Brazilian organization.