Experiences of users determine their actions and therefore have great influence on the business result of service providers. Thus, it is highly important to know and control these experiences. Decisions and actions are most effective if they are based on individual users and their detailed experience history. Currently available methods for measuring user experience fail in providing sufficient...

Data Science is a developing computational field in Central America and Mexico. The high availability of data related to energy and economy through several international agencies provides an excellent opportunity to plan and execute research projects and test tools and techniques. Also, energy is an important subject of research from different perspectives: economic, social, human development, ...

Four per-session guarantees are proposed to aid users and applications of weakly consistent replicated data: Read Your Writes, Monotonic Reads, Writes Follow Reads, and Monotonic Writes. The intent is to present individual applications with a view of the database that is consistent with their own actions, even if they read and write from various, potentially inconsistent servers. The guarantees...

The ASPs (Application Service Providers) are companies which offer the use of applications and remote services from a data centre. Using periodical payments and always-on connections, the ASPs take charge of the management and supply of applications to multiple companies over the Internet or other networks. In this way, the customer may access, so long as he has the computer structure in his co...

Loosely-coupled distributed systems have significant scale and cost advantages over more traditional architectures, but the availability of the nodes in these systems varies widely. Availability modeling is crucial for predicting per-machine resource burdens and understanding emergent, system-wide phenomena. We present new techniques for predicting availability and test them using traces taken ...

The mobile, wireless, and self-organizing features of ad hoc networks pose many challenges with respect to continuous availability and accessibility of data. In such a dynamic environment, there are many advantages in replicating a data item so there are multiple copies, including reduced response times and higher data availability. Also, if done efficiently, replication can help reduce energy ...

In order to meet the increasing processing demand of data intensive computing, an elasticdata intensive computing cluster EDICC is presented. Using local resource and cloud resource at the same time, EDICC has high availability and reliability, especially when flash crowd happens. EDICC could acquire resource from cloud when system is overloaded and release unnecessary cloud resource after load...