ESTGV - DI - Artigo em ata de evento científico internacional
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Browsing ESTGV - DI - Artigo em ata de evento científico internacional by Author "Abbasi, Maryam"
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- An Overview on Cloud Services for Human TrackingPublication . Martins, Manuel; Mota, David; Martins, Pedro; Abbasi, Maryam; Caldeira, FilipeThis paper reflects the intention to test the use of public cloud services to assess the presence of humans in a given space, more precisely, multiple stores, with the least effort and in the fastest way. It is also intended to demonstrate that the use of the public cloud can be an instrument of added value in business areas and research areas. In the specific case, the cloud was used to train and use artificial intelligence models.
- An overview on how to develop a low-code application using OutSystemsPublication . Martins, Ricardo; Caldeira, Filipe; Sá, Filipe; Abbasi, Maryam; Martins, PedroThe motivation for developing a self-service platform for employees arises precisely from the idea that in all organizations there are tasks that could be automated in order to redirect work resources to more important tasks. The proposed application consists of the development of a self-service platform, for personal information and scheduling tasks, aimed at the employees instead of all the solutions that are in the market that aim their platform to the Human Resources. We focus on the employers giving them more responsibility to make their own personal management like, change their personal info, book their vacations and other, giving to the Human Resources the tasks of managing all these actions made by the employers. At the end of the work, it is expected that the final solution to be considered as an example of success with regards to the theme of business automation and innovation, using the low-code application Outsystems to perform the full proposed application development.
- Cisco NFV on Red Hat OpenStack PlatformPublication . Oliveira, Luis; Martins, Pedro; Abbasi, Maryam; Caldeira, FilipeThe traditional telecom networks have been facing constant challenges to keep up with bandwidth growth, latency, data consumption and coverage. On top of it, there are also new use cases of telecom infrastructures usage such as the IoT exponential growth. The Network Function Virtualization (NFV) appears as the solution for the transition between high-cost dedicated hardware to low-cost commercial off-theshelf (COTS) servers. This transition will not only meet the requirements of the new telecom reality but also reduces the overall operational cost of the network. This document illustrates the implementation of Cisco Virtual Network Functions (VNFs) of a vEPC on top of Red Hat OpenStack Platform.
- Distributed data warehouse resource monitoring'Publication . Martins, Pedro; Sá, Filipe; Caldeira, Filipe; Abbasi, MaryamIn this paper, we investigate the problem of providing scalability (out and in) to Extraction, Transformation, Load (ETL) and Querying (Q) (ETL+Q) process of data warehouses. In general, data loading, transformation, and integration are heavy tasks that are performed only periodically, instead of row by row. Parallel architectures and mechanisms can optimize the ETL process by speeding up each part of the pipeline process as more performance is needed. We propose parallelization solutions for each part of the ETL+Q, which we integrate into a framework, that is, an approach that enables the automatic scalability and freshness of any data warehouse and ETL+Q process. Our results show that the proposed system algorithms can handle scalability to provide the desired processing speed in big-data and small-data scenarios.
- NoSQL Scalability Performance Evaluation over CassandraPublication . Abbasi, Maryam; Sá, Filipe; Albuquerque, Daniel; Wanzeller, Cristina; Caldeira, Filipe; Tomé, P.; Furtado, Pedro; Martins, PedroThe implementation of Smart-Cities is growing all over the world. From big cities to small villages, information able to provide a better and efficient urban management is collected from multiple sources (sensors). Such information has to be stored, queried, analyzed and displayed, aiming to contribute to a better quality of life for citizens and also a more sustainable environment. In this context it is important to choose the right database engine for this scenario. NoSQL databases are now generally accepted by the database community to support application niches. They are known for their scalability, simplicity, and key-indexed data storage, thus, allowing an easy data distribution and balancing over several nodes. In this paper a NoSQL engine is tested, Cassandra, which is one of the most scalable, amongst most NoSQL engines and therefore, a candidate for use in our application scenario. The paper focuses on horizontal scalability, which means that, by adding more nodes, it is possible to respond to more requests with the same or better performance, i.e., more nodes mean reduced execution time. Although, adding more computational resources, does not always result in better performance. This work assesses how each workload (e.g., data volume, simultaneous users) influence scalability performance. An overview of the Cassandra database engine is presented in the paper. Following, it will be tested and evaluated using the benchmark Yahoo Cloud Serving Benchmark (YCSB).
- NoSQL: A Real Use CasePublication . Martins, Pedro; Sá, Filipe; Caldeira, Filipe; Abbasi, MaryamAs the amount of information flow increases, business companies feel the need to improve on storage systems. Henceforth, to tackle this increasing need, paradigms such as NoSQL emerge to solve the unlimited data growing requirement. However, the NoSQL solution has no proofs given in the field to support their solution claims. Benchmarks can test and compare different solutions performance by executing queries over a toy dataset (synthetically generated). The problem with benchmarking results is how to extend the conclusions to a real system operating within a real business scenario. In this paper, an actual corporate case study is used, with real-world data, to evaluate how NoSQL databases perform. First, using big data, write-intensive tests are implemented and evaluated using Cassandra, MongoDB, Couchbase, and compared with the relational database in place, which is within the throughput limit. Results show a throughput comparison for each tested approach.