CHAIR OF

SOFTWARE ENGINEERING

The inspection of the exams of Software Engineering from 16.07.2015 and of Programming Paradigms from 31.07.2015 will take place on 18.08.2015 from 13-15 o'clock in G29-321.

Unfortunately, the specification technology lecture on Thursday, June 18, 2015 has to be canceled. It will be made up for in the exercise on Tuesday 23.06.2015. Exercise and lecture will take place together on this day. Exercise sheet 11 will be worked on and the summary from 11.06. will be presented.

Lectures will then take place as normal on Thursday.

On 02.06.2015, Mr. Ben Rabeler successfully defended his bachelor thesis on the topic "Abstraction of continuous behavior for model-based safety analysis".

We are pleased to announce Mr. Kai Spichale for the lecture Software Engineering on 9.6.2015. Mr. Spichale is a software architect at Adesso AG and will give a talk on software erosion as part of the Software Engineering lecture. Not only best and worst programming practices in software development will be presented and discussed, but also metrics and measures to avoid software erosion.

Software erosion refers to the gradual deterioration of existing software, such as the increasing decline in performance, difficulties in adaptability or an increase due to the accumulation of program errors, as well as incompatibilities with new and future software environments. In the medium term, the once clean software solution becomes a collection of individual solutions and, in the long term, a legacy system and therefore unusable.

Unfortunately, software erosion is not an exception, but affects many projects. This is because almost every software change leads to an increase in complexity. It is therefore important to regularly improve the code through targeted refactoring measures. Software metrics and coding rules help to identify the relevant areas. Various tools exist for defining and checking module boundaries. The regular comparison between planned architecture and implementation helps to maintain the quality and maintainability of a code base in the long term.

Interested parties are cordially invited.

Where? G29 -  R307

When? 11 - 13 Uhr

The lecture Specification Technology on 07.05.2015 from 9-11 a.m. by Prof. Ortmeier is canceled due to illness.

The lecture will be made up for the next exercise.

The university center cedemo, an initiative of Otto von Guericke University Magdeburg and the Fraunhofer Institute for Factory Operation and Automation IFF, officially presented itself to a broad specialist audience from industry, trade and science for the first time at the Cyber Data Sovereignty Innovation Forum on April 15 and 16.

At the presentation, further training was emphasized as a key challenge for the future of digital engineering. This can only be successfully marketed if current research and the networking of international, interdisciplinary knowledge pools are combined with tailored further training courses for the Industry 4.0 sector. To this end, the University of Magdeburg and the IFF have created cedemo, an instrument that is unique in Germany in its ability to network and utilize the expertise available in Magdeburg. The comprehensive knowledge of the Max Planck Institute for Dynamics of Complex Technical Systems, the Institute for Automation and Communication ifak e.V. and the SAP University Competence Center in this area complements the bundled expertise at the competence center.

All information about cedemo is available at www.cedemo.de, contact or 0391-67 57 007.

The workflow of industrial robots consists of a series of tasks that have to be repeated several times. The efficiency with which the robot performs its tasks is important for most production areas. The more tasks a robot can complete in a time interval, the more benefits it offers the company. Most tasks have a certain degree of freedom in their execution. For example, closed contour tasks can be started and finished at any point on the curve, or there are a number of possible start orientations of the end effector. We propose a method to improve the given sequence of robot tasks by providing some freedom to (i) the starting point along the curve, (ii) the orientation of the end effector, and (iii) a robot configuration. The proposed approach does not depend on the production domain or the algorithm used to construct the initial task sequence.

We propose to apply hierarchical optimization. Its goal is to perform a fast local search on each nested stage instead of applying slow global optimization techniques to the whole problem. We define three nested stages. Each outer level depends on the results of the optimization at the inner level.

The algorithm showed a significant improvement in production time for the cutting-deburring test instances, i.e. it improved the time by 38% for the instances with 15 holes in 68 seconds. The evaluation results are available online in MS Excel 2007 format here. Further details can be found in the publication.