The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A federated cloud environment is composed of interconnected clouds that share resources using an interface, transparent to users. In such environments, ensuring security is a complex task, since individual characteristics of each federated cloud has to be considered. This is one important issue, which can prevent companies and organizations from adopting federated clouds. In this context, this paper...
Public administration faces expressive daily challenges in its attempt to assist every citizen who relies on public services. Precise and updated data that allows the identification of people's expectations and needs, may be valuable on the elaboration and management of successful public policies. To make data collection a more practical and extensive process, this paper introduces a Mobile Public...
OpenStreetMap is a collaborative mapping tool that was created in 2004 by computer student, Steve Coast. The initial idea of the project targeted mapping the United Kingdom region exclusively, however, researchers from other countries became interested and were added as well. Since thousands of users insert new data into the instrument, on an ongoing basis, the quality of that data raises concern...
Graph databases, similar to other NoSQL approaches, have emerged as an alternative to solve specific problems ill fitted to relational models. The huge amounts of data produced, and the high capability for horizontal scalability provided by NoSQL databases has led to the increasing adoption of these systems, which can now be adapted to support geographic data. This article presents an analysis on...
Procurement is one of the main forms of acquisition of the Federal Government and are subject to fraud and corruption. In this context, many institutions such as the Brazilian Office of the Controller General try to identify fraud evidences, e.g., use of queries in databases with information about partnership of companies owned by the same group of people to simulate competition. However, many of...
With participation from the general public, it is possible to measure the quality of public services rendered to the population. The current proposal aims to collect popular opinion through an app, simplifying and facilitating the use of the app for users, and increasing the speed at which government managers receive this information. This application, developed for Apple's iOS system, aims to integrate...
K-mer Mapping, an internal process for many de novo genome fragments assembly methods, constitutes a computational challenge due to its high main memory consumption. We present in this paper a study of indexing methods to deal with this problem, considering plant genome assembling. We propose an ad-hoc I/O cost model to analyze the performance of B+− tree and hashing index structures. We use indexes...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.