Legal Notice & Privacy Policy

Legal notice

Information pursuant to Section 5 of the German Digital Services Act (Digitale-Dienste-Gesetz, DDG):

Responsible for editorial content pursuant to Section 18(2) of the German State Media Treaty (Medienstaatsvertrag, MStV): Jerg Gutmann, at the address stated above.

Privacy policy

Last updated: 7 November 2026

1. Controller

The controller within the meaning of the General Data Protection Regulation (GDPR) is Jerg Gutmann. The contact details are stated in the legal notice above.

2. Hosting and server logs

This website is hosted by STRATO AG. When the website is accessed, the hosting provider processes technical access data needed to deliver and secure the site. This may include the requested page or file, date and time, transferred data volume, referrer, browser and operating-system information, and an anonymized host name or IP address. STRATO states that client host names and IP addresses in its customer log files are anonymized.

The legal basis is Article 6(1)(f) GDPR. The legitimate interests are the secure, reliable, and technically efficient provision of this website. Log data are retained according to the hosting provider's applicable retention schedule and may be kept longer where necessary to investigate security incidents or comply with legal obligations. Further information is available in STRATO's privacy policy.

3. Google Scholar statistics

The citation statistics displayed on the homepage are retrieved and cached by the web server from publicly available Google Scholar information. A visitor's browser does not connect to Google Scholar or SerpApi merely because these statistics are displayed, and this feature does not transmit visitor data to either service.

4. Google Maps

The homepage offers an embedded Google Map provided by Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. The map remains blocked until a visitor selects “Load Google Map.” Before that selection, no map content is requested from Google.

Activating the map establishes a direct connection to Google. Google may receive the visitor's IP address, the address of the page, browser and device information, and the date and time of the request, and may store or read cookies or similar information. If the visitor is signed in to a Google account, Google may associate the request with that account. The activation is based on consent under Article 6(1)(a) GDPR and, where applicable, Section 25(1) TDDDG. The decision is not stored by this website; reloading the page blocks the map again. Consent can therefore be withheld or withdrawn for future connections by not activating the map or by reloading the page.

Data may be processed in the United States. Google LLC participates in the EU–US Data Privacy Framework. Additional information is available in Google's privacy policy and its information about Google services on third-party sites.

5. Email contact

If a visitor contacts Jerg Gutmann by email, the supplied information is processed to answer the inquiry. The legal basis is Article 6(1)(f) GDPR or, where the communication concerns a contract or pre-contractual measures, Article 6(1)(b) GDPR. The information is deleted when it is no longer required for the communication, unless legal retention obligations apply.

6. External links

This website contains links to external websites. No connection to those providers is established merely by displaying a link. When a visitor follows an external link, the destination provider processes the resulting request under its own responsibility and privacy policy.

7. Analytics, advertising, and cookies

This website does not use web analytics, advertising services, or tracking technologies. It does not set its own non-essential cookies. Third-party content is loaded only after the visitor activates the Google Map or follows an external link.

8. Data-subject rights

Subject to the applicable legal requirements, data subjects have rights of access, rectification, erasure, restriction of processing, and data portability under Articles 15–20 GDPR. They may object to processing based on Article 6(1)(f) GDPR under Article 21 GDPR and may withdraw consent at any time with effect for the future under Article 7(3) GDPR. They also have the right to lodge a complaint with a supervisory authority under Article 77 GDPR.

The locally competent authority is the Hamburg Commissioner for Data Protection and Freedom of Information, Ludwig-Erhard-Str. 22, 20459 Hamburg, Germany.

Copyright

Unless otherwise indicated, the original text and design of this website are protected by copyright. Publications, datasets, code, images, and other linked or downloadable materials may be subject to separate licences or third-party rights. The terms stated with the respective material apply.