Top PDF Adoção de sistemas cloud computing

Adoção de sistemas cloud computing

Adoção de sistemas cloud computing

O modelo permite avaliar a norma subjetiva do individuo sendo função entre as expectativas percebidas e a motivação da pessoa para cumprir essas expectativas (Fishbein & Ajzen, 1975). O objetivo da TRA tende assim a explicar comportamentos intencionais. A intenção comportamental tem sido definida como a probabilidade subjetiva de um utilizador de sistemas de informação realizar um comportamento específico. A atitude refere-se ao grau de afeto que um utilizador tem em relação ao comportamento alvo. A norma subjetiva refere-se à opinião das pessoas mais importantes para o individuo relativamente a efetuar ou não o comportamento em assunto. A importância da informação é estimada através de regressões múltiplas de modo a determinar a influência causal relativa dos componentes de atitude e normativos esperando assim variações entre as diversas situações (Fishbein & Ajzen, 1975). O modelo proporciona desta forma uma teoria fundamentada sobre as ligações motivacionais entre estímulos externos e o resultado comportamental. Introduzido por Davis (1989), nasce o Modelo de Aceitação de Tecnologia, Technology Acceptance Model (TAM), desenvolvido a pensar exclusivamente nos Sistemas de Informação, com o objetivo de os avaliar no que diz respeito à sua aceitação e utilização. O Modelo sugere desta forma que quando os utilizadores estão perante uma nova tecnologia, um conjunto de fatores influenciam a sua decisão sobre quando e como a usar. O propósito de desenvolvimento do Modelo TAM surgiu de um contrato da IBM Canadá com Massachusetts Institute of Technology (MIT), nos anos 80, com o objetivo de avaliar o potencial do mercado para novos produtos da marca e possibilitar uma explicação dos fatores da
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Adoção de ERP em ambiente cloud

Adoção de ERP em ambiente cloud

A tendência de adoção do modelo Cloud tem estado em claro crescimento nos últimos anos como já foi demonstrado anteriormente. Pode-se atribuir este desenvolvimento à proliferação da internet, dispositivos móveis como smartphones e tablets e ainda à crescente necessidade de mobilidade dos utilizadores finais. Surge então também a necessidade de se estudar a área da adoção do modelo da Cloud e quais os fatores que a influenciam, tendo em conta as suas características e vantagens/desvantagens relativas aos modelos tradicionais. Nesse sentido alguns autores têm estudado formas de escolher os serviços cloud mais adequados em função do contexto (Reixa, et. al., 2012). A adoção tem ainda sido objeto de estudo, partindo de modelos mais tradicionais (Pinheiro et. al. 2014). Gupta, Seetharaman e Raj (2013) propuseram um modelo explicativo da adoção do modelo Cloud por parte das Pequenas e Médias empresas. Este modelo apresenta cinco fatores mediadores da utilização de sistemas Cloud, sendo estes o custo, a segurança e privacidade, partilha e colaboração, confiabilidade e a facilidade de utilização e conveniência.
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Cloud computing: estudo das perspectivas de adoção deste modelo de tecnologia da informação por um grupo de empresas fortalezenses

Cloud computing: estudo das perspectivas de adoção deste modelo de tecnologia da informação por um grupo de empresas fortalezenses

Quase todas as empresas usam de alguma forma a tecnologia da informação (TI) em seus processos administrativos e industriais. Por fornecer informações cada vez mais rapidamente, a TI melhora a eficiência e a eficácia de uma organização, especialmente no seu processo de tomada de decisão estratégica (DAFT, 2006). Dessa maneira, a TI abandona o tradicional suporte de retaguarda para assumir papel integrante na estratégica de negócios das organizações (HENDERSON & VENKATRAMAN, 1990). A filosofia ERP, considerada como um grande avanço de TI já no século XX orienta ao compartilhamento de bases de dados na integração de sistemas. Extrapolando os limites de um ERP, as empresas do século XXI deverão manter um nível de otimização contínua para chegarem ao sucesso. Essa otimização, segundo Taurion (2009) fará com que as organizações do novo século passem a navegar em um ambiente de constantes mudanças com limites físicos, virtualmente integradas com seus fornecedores, clientes e parceiros de negócios. Essa forma ampliada e compartilhada de intercomunicação é denominada, metaforicamente, de computação em nuvem, Cloud Computing 1 . Por
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UM ESTUDO DAS OPORTUNIDADES E DESAFIOS ENVOLVIDOS NA UTILIZAÇÃO DE SERVIÇOS DE CLOUD COMPUTING MESTRADO EM TECNOLOGIAS DA INTELIGÊNCIA E DESIGN DIGITAL

UM ESTUDO DAS OPORTUNIDADES E DESAFIOS ENVOLVIDOS NA UTILIZAÇÃO DE SERVIÇOS DE CLOUD COMPUTING MESTRADO EM TECNOLOGIAS DA INTELIGÊNCIA E DESIGN DIGITAL

A adoção de Cloud Computing, por receio das empresas com relação ao modelo, acabou ficando pautada em e-mails, planilhas, softwares de antivírus e tudo que não era fundamental para os negócios, esta foi a forma encontrada pelas empresas para testar as características do negócio. Porém, esse receio diminuiu por parte dos usuários corporativos que já pensam nas alternativas que estas aplicações permitem em seus negócios. Esses usuários estão alterando o comportamento de compra com base na velocidade de implantação, personalização e economia que os serviços da Cloud Computing lhes fornecem, sendo que não se trata mais de ser ou não ser adotado, mais sim com qual velocidade e intensidade. (COMPUTERWORLD, 2012b; FORBES, 2012; TAURION, 2013a).
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IPS ESCE Dissertação cloud computing 2012

IPS ESCE Dissertação cloud computing 2012

Para Rhoton (2010) Cloud Computing pode ser um meio de implementar um projeto SOA. Advoga que uma empresa que use a arquitetura orientada a serviços nas suas aplicações está melhor posicionada para aderir ao Cloud Computing. Este autor advoga também que muitas vezes o SOA é visto do lado tecnológico, conduzindo a implementações distorcidas. Para que os benefícios do SOA sejam atingidos, as equipas de negócio devem trabalhar ativamente com as equipas de Sistemas de Informação. Cada unidade de negócio que projeta e pede uma aplicação deverá pensar que não é somente ela a consumidora daquela informação e que a aplicação que está a pedir é ela própria potencial fornecedora de informação a outras unidades de negócio. Desta forma a empresa tornar-se-á mais ágil ao interligar-se mais rapidamente, mas também ao reutilizar e reaproveitar esforços e investimentos já realizados.
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Determinantes da adopção da tecnologia cloud computing nas organizações portuguesas

Determinantes da adopção da tecnologia cloud computing nas organizações portuguesas

O conceito de compatibilidade refere-se ao nível em que a inovação é percebida de modo a ser consistente com a organização interna e com os sistemas de informação (Lin & Chen, 2012). O ambiente organizacional interno engloba as estruturas das organizações, a estratégia de negócio, os valores existentes, as experiências, as práticas de trabalho e as necessidades organizacionais. Os sistemas de informação interna incluem a capacidade, a infraestrutura, a tecnologia de domínio e a técnica de implementação (Kang et al., 1998). Em estudos sobre a adoção da tecnologia web, verificou-se que as primeiras organizações a adotarem tecnologias, colocam mais ênfase nos benefícios percebidos e na sua compatibilidade com as normas existentes na organização (Beatty et al., 2004). A compatibilidade com os valores existentes, a experiência, as necessidades de negócios e a infraestrutura tecnológica são fundamentais para os profissionais de TI (Lin & Chen, 2012). Deste modo, pode-se argumentar que:
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Cloud Computing para a Administração Pública Portuguesa

Cloud Computing para a Administração Pública Portuguesa

Pelo exposto, a adoção do modelo de cloud computing preconizando, cloud computing comunitária, deverá ser a melhor solução de implementação de cloud computing na AP, para a gestão das suas infraestruturas de TIC, defendendo o candidato a construção faseada de um mega centro de dados, o qual deverá ficar sobre a tutela de um único organismo público, como por exemplo a Entidade de Serviços Partilhados da Administração Publica (ESPAP), ou entidade equivalente, estrategicamente posicionada para o fazer, a quem será confiada a administração da cloud comunitária da AP portuguesa.
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Aplicação da plataforma SaaS - Software as a Service em Enterprise Resource Planning (ERP)

Aplicação da plataforma SaaS - Software as a Service em Enterprise Resource Planning (ERP)

O objetivo deste trabalho é esclarecer os conceitos de cloud computing, de software as a service e perceber o que esta mudança irá alterar nas organizações e nas implementações de sistemas ERP. Compara-se neste trabalho não só a diferença de metodologias de implementação de um ERP, confrontando-se a implementação tradicional com a disponibilidade do sistema em regime SaaS, mas também os efeitos tecnológicos e organizacionais que esta nova abordagem trás às empresas. É também objetivo deste documento entender quais as vantagens e desvantagens deste novo modelo de comercialização, o que irá mudar na relação cliente/fornecedor, que ganho poderá trazer à organização, que custos poderão ou não ser suprimidos (hardware, licenciamento, manutenção, etc.) e que impactos poderão ocorrer na organização.
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Implementation of Cloud Computing into VoIP

Implementation of Cloud Computing into VoIP

We also must mention the personnel costs that in the traditional method implies, because it requires a large number of people to mange resources, allocated in different geographical areas. Also, every new installation needs to be fully made, and this translates in large installation time for every new server. In cloud computing these aspects can be solved in a reduced amount of time, the installation of services taking very little. It is done by cloning other virtual nodes, so all the software and application installation is done only once and then all the new software is installed by cloning. In this way a large number of identical servers can be created within minutes, without the need to separately install each necessary application.
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CLOUD COMPUTING SECURITY

CLOUD COMPUTING SECURITY

The three main aspects of cloud computing are software as a service, platform as a service and infrastructure as a service. A SaaS provider typically hosts and manages a given application in their own data centre and makes it available to multiple tenants and users over the Web. Some SaaS providers run on another cloud provider’s PaaS or IaaS service offerings. Oracle CRM On Demand, Salesforce.com, and Netsuite are some of the well known SaaS examples. Platform as a Service (PaaS) is an application development and deployment platform delivered as a service to developers over the Web. It facilitates development and deployment of applications without the cost and complexity of buying and managing the underlying infrastructure, providing all of the facilities required to support the complete life cycle of building and delivering web applications and services entirely available from the Internet. This platform consists of infrastructure software, and typically includes a database, middleware and development tools. A virtualized and clustered grid computing architecture is often the basis for this infrastructure software. Some PaaS offerings have a specific programming language or API. For example, Google AppEngine is a PaaS offering where developers write in Python or Java. EngineYard is Ruby on Rails. Sometimes PaaS providers have proprietary languages like force.com from Salesforce.com and Coghead, now owned by SAP. Infrastructure as a Service (IaaS) is the delivery of hardware (server, storage and network), and associated software (operating systems virtualization technology, file system), as a service. It is an evolution of traditional hosting that does not require any long term commitment and allows users to provision resources on demand. Unlike PaaS services, the IaaS provider does very little management other than keep the data centre operational and users must deploy and manage the software services themselves--just the way they would in their own data centre. Amazon Web Services Elastic Compute Cloud (EC2) and Secure Storage Service (S3) are examples of IaaS offerings. [2]
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Information Leakage Prevention In Cloud Computing

Information Leakage Prevention In Cloud Computing

The cloud computing system is like your virtual computer that is a virtual location of your resources.The user can access their resources those are placed on a cloud as on their real system resources. The user can install applications, store data etc. and can access through internet anywhere. The user do not need to buy or install any hardware to upgrade his machine. They can do it via internet. In future we may need only notebook PC or a mobile phone to access our powerful computer and our resources anywhere.Security aspects of cloud computing are gaininginterests of researchers as there are still numerous unresolved issues which needed to be addressed before large scale exploitation take place. Cloud computing is not something that suddenly appeared overnight;in some form it may trace back to a time when computer systems remotely time –red comuting resources And applications. More currently though, cloud computing refers to the many different types of services and applications being delivered in the internet cloud, and the fact that, in many cases, the devices used to access these services and
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REVIEWING SOME PLATFORMS IN CLOUD COMPUTING

REVIEWING SOME PLATFORMS IN CLOUD COMPUTING

Presently, the Cloud computing has been emerging as a good hot topic since the late of 2007. Industry and academia are starting projects related to Cloud computing. For example, Microsoft has published its Cloud computing system- Windows Azure Platform [1]. Amazon Elastic Compute Cloud [2]; IBM’s Blue Cloud [3]; HP, Intel Corporation and Yahoo! Inc. recently announced the creation of a global, multi-data center, open source Cloud computing test bed for industry, research and education [4]. In the last few years, virtualization has introduced some novel system techniques so that the cloud-provider can transparently satisfy its cloud customers’ requirements without impacting their own system utilization. Cloud computing differs from grid computing in this regard, it can run in conjunction with the original business workloads. Moreover, novel virtualization technologies, e.g. live- migration and pause-resume give rapid and transparent solutions, interference may not occur between the original systems and the cloud workloads [6]. Consequently,
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The Adoption of a National Cloud Framework for Healthcare Delivery in Nigeria

The Adoption of a National Cloud Framework for Healthcare Delivery in Nigeria

Since the introduction of the internet, the movement of information and the flow of knowledge have greatly increased. This is without a doubt a very good development;the internet has proven to be man’s greatest discovery since the invention of the computer. This discovery has given rise to a new era called the information age where access to useful information is power. Hence the prediction that organizations like Google will be the leading force in the future due to their interest in providing “data centric” services to people. This is made possible through the technology called cloud computing. When you store information like photos online instead of your local computer or you use a webmail service provided by Google or Yahoo or when you post your information on social networking site like Facebook you are using a “Cloud Computing” service.
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Cloud Computing: A study of cloud architecture and its patterns

Cloud Computing: A study of cloud architecture and its patterns

Cloud computing is a general term for anything that involves delivering hosted services over the Internet. Cloud computing is a paradigm shift following the shift from mainframe to client–server in the early 1980s. Cloud computing can be defined as accessing third party software and services on web and paying as per usage. It facilitates scalability and virtualized resources over Internet as a service providing cost effective and scalable solution to customers. Cloud computing has evolved as a disruptive technology and picked up speed with the presence of many vendors in cloud computing space. The evolution of cloud computing from numerous technological approaches and business models such as SaaS, cluster computing, high performance computing, etc., signifies that the cloud IDM can be considered as a superset of all the corresponding issues from these paradigms and many more. In this paper we will discuss Life cycle management, Cloud architecture, Pattern in Cloud IDM, Volatility of Cloud relations.
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Architecture Design & Network Application of Cloud Computing

Architecture Design & Network Application of Cloud Computing

According to Gartner’s Hype cycle, cloud computing has reached a maturity that leads it into a productive phase. This means that most of the main issues with cloud computing have been addressed to a degree that clouds have become interesting for full commercial exploitation. This however does not mean that all the problems listed above have actually been solved, only that the according risks can be tolerated to a certain degree. Cloud computing is therefore still as much a research topic, as it is a market offering. What is clear through the evolution of Cloud Computing services is that the CTO is a major driving force behind Cloud adoption. The major Cloud technology developers continue to invest billions a year in Cloud R&D; for example, in 2011 Microsoft committed 90% of its $9.6bn R&D budget to Cloud. Additionally, more industries are turning to cloud technology as an efficient way to improve quality services due to its capabilities to reduce overhead costs, downtime, and automate infrastructure deployment.
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A Survey of Cloud Computing: Designing, Applications, Security  Issues and Related Technologies

A Survey of Cloud Computing: Designing, Applications, Security Issues and Related Technologies

Designing energy-efficient data centers has recently received considerable attention. This problem can be approached from several directions. For example, energy efficient hardware architecture that enables slowing down CPU speeds and turning off partial hardware components has become commonplace. Energy-aware job scheduling and server consolidation are two other ways to reduce power consumption by turning off unused machines. Recent research has also begun to study energy-efficient network protocols and infrastructures. A key challenge in all the above methods is to achieve a good trade-off between energy savings and application performance. In this respect, few researchers have recently started to investigate coordinated solutions for performance and power management in a dynamic cloud environment.
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Performance Evaluation of Smart Decision Support Systems on Healthcare

Performance Evaluation of Smart Decision Support Systems on Healthcare

essential factor to impact human welfare. In this sense, the authors proposed an emotion-aware smart system for Big Data application in healthcare using both logical reasoning and emotion-based computing. This model is based on software-defined network (SDN) and 5G tech- nologies as well as cloud computing environments, to improve resource utilization and global network performance. Performance evaluation used data generated by wearable devices and sensors. Results showed an interesting relation between the emotion and user ’s health state. Alhussein discussed the importance of the emotion recognition for in- itial analysis of the patient [24]. The author also presented an emotion- aware system for facial recognition using Weber local descriptors for the pattern recognition. The presented approach subdivides a static facial image into several blocks to obtain a histogram for this image. Results demonstrated that the proposed model achieved a high re- cognition rate. From a medical perspective, identifying patients with emotional deficits can help health professionals identify those who are most vulnerable to psychological disorders, i.e., patients who could bene fit from a timely individualized intervention. Cheng et al. proposed a smart clothing based on cloud technology for next-generation healthcare systems [25,26]. This study presented a design of a practical mechanism for wearable computing-based emotional interaction for sentiment analysis using predicting models in controllable affective interactions. Results showed that the use of components to collect physiological data and receive analysis results about patient ’s emo- tional condition, provided by cloud-based machine intelligence and wearable devices, can improve the quality of experience and service for users considerably. Zhang et al. discussed issues related to interoper- ability, processing time, and stored data characteristics for emotion- aware smart systems [27]. The authors proposed a patient-centric cyber-physical system for applications and services in health. This model is based on cloud computing and Big Data analytics technologies. The results showed that cloud-based technologies and Big Data en- vironments enhance the performance of conventional models, allowing several smart applications and services anywhere and anytime.
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SLA for E-Learning System Based on Cloud Computing

SLA for E-Learning System Based on Cloud Computing

The SLA parameters are specified by metrics; these metrics define how the parameters of the cloud service can be measured. Usually, these metrics are varied from an application to another. So in this paper, the SLA parameters are specified only for the E-Learning applications [6]. Most users are confused in defining the important parameters. For the E-Learning applications, four types of services which providers can provide to the users. These services are IaaS, SaaS, PaaS, and Storage as a Service [6]. For each part of the SLA, the most important parameters that the users can use to create a reliable model of negotiation with the service provider are defined [6].
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Analysis of interoperability and standards for cloud computing

Analysis of interoperability and standards for cloud computing

Abstract : Cloud interoperability will enable cloud infrastructures to evolve into a worldwide, transparent platform in which applications aren’t restricted to enterprise clouds and cloud service providers. We must build new standards and interfaces that will enable enhanced portability and flexibility of virtualized applications. Cloud computing in computer science in recent times is considered as one of the emerging areas. This flexible infrastructure is providing excellent facilities for business entrepreneurs. Cloud computing offers the IT industry, however, has yet to be satisfactory research and development in this area. Our contribution in this paper focuses on the concept of cloud computing is one of the most advanced new technology for computer world. In this paper we analyze what are the different standards for cloud infrastructure and also study how interoperability is important factor in cloud environment. Cloud interoperability refers to customers’ ability to use the same artifacts, such as management tools, virtual server images, and so on, with a variety of cloud computing providers and platforms.
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Guaranteeing Data Storage Security in Cloud Computing

Guaranteeing Data Storage Security in Cloud Computing

With a specific end goal to accomplish affirmation of information stockpiling accuracy furthermore, information slip limitation all the while, our plan totally depends on the pre computed check tokens. The principle thought is as per the following: before record appropriation the client pre computes a specific number of short check tokens on individual vector G(j) (j ∈ {1, . . . , n}), every token covering an irregular subset of information squares. Later, when the client needs to verify the capacity accuracy for the information in the cloud, he challenges the cloud servers with an arrangement of arbitrarily produced piece files. After getting test, every cloud server registers a short "mark" over the predetermined squares and returns them to the client. The estimations of these marks ought to match the relating tokens pre computed by the client. In the meantime, as all servers work over the same subset of the files, the asked for reaction values for respectability check should likewise is a substantial code word controlled by mystery lattice.
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