Author: Ψηφιακά Συστήματα

Start at Upstream – Graduate Trainee Program

Software Engineers Start at Upstream!

Fresh out of university, you realize there are still a lot of skills on demand for software engineers, you haven’t yet been taught. What should you do now? Look for a job or a training program?

What if you didn’t have to choose? Just… Start at Upstream, our 12-month full paid internship program for full stack and back-end developers, including a 2 month state of the art training program.

Join us: https://bit.ly/3DUc7GS
#startatupstream #joinupstream #jobhunting #graduateprogram #traineeship #fullstackdeveloper #backenddeveloper

Applications until 17 October 2021.

The article of the month: Best research paper award

The research paper “A Novel Indexing Method for Spatial-Keyword Range Queries”, co-authored by Associate Professor Christos Doulkeridis of the Dept. of Digital Systems, received the “Ralf H. Güting Best Research Paper Award” in the 17th International Symposium on Spatial and Temporal Databases (SSTD’21). SSTD is one of the flagship events of thespatial / spatiotemporal database community.

Presentation (video): https://www.youtube.com/watch?v=EkZDKP4KDXI

Paper: https://dl.acm.org/doi/10.1145/3469830.3470897

Big Data Processing in NoSQL Systems

Christos Doulkeridis

Associate Professor

A novel method for unifying NoSQL storage systems for big data developers

Researchers from the Department of Digital Systems propose a novel method for unified data access to NoSQL stores.

Even though NoSQL stores (MongoDB, CouchDB, HBase, Cassandra, Redis, etc.) comprise the state-of-the-art technology for Big Data management, they still rely on different languages and programming APIs, thus hindering application development.

«Simple idea, yet very useful» [External reviewer]

In plain terms, NoDA is a programming API (see the blue layer at the right part of the figure) that consists of basic data access operators (such as filter, project, aggregate, sort), which are implemented for each NoSQL system separately, thus offering a simple and familiar language to the big data developer in order to implement applications, with the following advantages:

  • It is simple to use and easy to learn, as it hides the peculiarities of each NoSQL system.
  • It is unified, thus allowing code portability from one NoSQL system to the other, in the same spirit as in relational databases.
  • It offers additionally a declarative, SQL-like interface, which makes it more user-friendly both for big data developers and data analysts.

This research work is carried out by PhD student Nikolaos Koutroumanis, supervised by Associate Professor Christos Doulkeridis.

More information:

Onassis Foundation – Scholarships call for the academic year 2020-21

ONASSIS FOUNDATION SCHOLARSHIPS  

APPLICATIONS FOR THE ACADEMIC YEAR 2020-21 ARE NOW OPEN

We know well what it means to give young people opportunities. Aristotle Onassis started very young with a vision in his luggage and conquered the world. That is why, ever since 1978, we release potential, having offered more than 7,000 scholarships. And we keep going. Through our scholarship programs, the Foundation constantly supports those who excel, who wish to distinguish themselves in their discipline and chase their dreams. 

Submission Deadline: 28 February 2020
Applications can only be submitted online. Should you require any assistance or if you have any further queries, please do not hesitate to contact us by telephone: +30 210 37 13 054, -055, -056, -057 or by e-mail: scholarships@onassis.org

The announcement containing the terms and conditions is available here.

Studies in countries worldwide

Studies in Greece