Tesys-eLeTK

eLeTK is a software system that may be used for enhancing on-line educational environments. eLeTK may become a recommender system for students or professors, a knowledge self-assessment tool for students or an custom learning path builder.

The core business logic of eLeTKis represented by custom integration of different machine learning/information retrieval algorithms adapted to work with data provided by Tesys-Web.

The main purpose of eLeTK is to offer feedback for users of the on-line educational system in an attempt to enhance the educational proficiency. The intuition of such a system is that it represents a substitute for the knowledge that a real professor acquires in a face-to-face educational systems.

Software Architecture of eLeTK

The software architecture is a modular one and is built around the idea of Data Analysis Workflow. A DAW represents a data processing pipeline which is custom designed to accommodate data coming from on-line educational systems.

The software architecture of eLeTK ensures the proper integration of different modules is such a way that development (e.g. adding new data models or new fault handlers) is performed in a productive manner. Another property of the software architecture is modifiability. This means that steps that make up a DAW can be added/edited/deleted in a reasonable way. The software architecture integrates a logging mechanism such that error analysis and debugging may be performed with rapid discovery of faults.

There are two types of users for the eLeTK system.
One is represented by the system administrators. Their main job is to set up the DAWs by specifying raw data sources, data modelers, performance assessors, fault handlers and a schedule. The administrators need to be experienced data analysts such that created DAWs have a good structure, be reliable and provide usable and high quality knowledge.
The second type of users is represented by ones who just run the DAWs. They are represented by users from of the information system (e.g., students, professors, etc.) and they are regarded as end-users. From this perspective they represent the main beneficiaries of the eLeTK system.