Computação em nuvem é uma tendência recente de tecnologia cujo objetivo é proporcionar serviços sob demanda com pagamento baseado no uso. Neste ambiente, a qualidade do serviço é uma característica fundamental que deve ser fornecida pelos provedores. Existem muitos modelos para acordo de nível de serviço em nuvem. Entretanto, estes modelos são muito gerais e não abordam características do geren...

With a brief introduction of the definitions of de-motivation, this article reviews present research on student de-motivation, analyzes the teacher motivation from the macro-contexts and micro-contexts, and puts forward suggestions in getting rid of de-motivation.

One research goal in Second Language Acquisition (SLA) is to formulate and test hypotheses about errors and the environments in which they are made, a process which often involves substantial effort; large amounts of data and computational visualisation techniques promise help here. In this paper we have defined a new task for finding contexts for errors that vary with the native language of th...

abstract aim and background: the key purpose of the study was to investigation the relationship of job burnout and some of job variables like type and level of responsibility, service and mangement experiences. method and materials: this descriptive study was conducted on 245 managers and vice-chancellors randomly selected by the cluster-sampling technique. they were assessed by job burnout que...

There exist various service systems that have hierarchical structure. In hierarchical service networks, facilities at different levels provide different types of services. For example, in health care systems, general centers provide low-level services such as primary health care services, while the specialized hospitals provide high-level services. Because of demand congestion in service networ...

According to the current Airport planning and design practices, for a given demand level there is a corresponding space requirement. While in practice, there are always trade-offs between cost and levels of service, labor and automation, equipment and fixed facilities, and expansion of existing facilities and the addition of new ones. In this research, the airport passenger Terminal Building (P...