Ass.-Prof. Mag. Dr. Harald Tschan
Harald Tschan
T: +43-1-4277-48862

Consultation hours: by personal agreement


Rausch LK, Birklbauer A, Federolf P, Hecksteden A, Hofmann P, Niebauer J et al. Position statement regarding the current standing of exercise therapy in Austria. Current Issues in Sport Science (CISS). 2024;9(1).

Bauer P, Majisik A, Mitter B, Csapo R, Tschan H, Hume P et al. Body Composition of Competitive Bodybuilders: A Systematic Review of Published Data and Recommendations for Future Work. Journal of Strength and Conditioning Research. 2023 Mar 1;37(3):726-732. Epub 2023. doi: 10.1519/JSC.0000000000004155

Mitter B, Zhang L, Bauer P, Baca A, Tschan H. Modelling the relationship between load and repetitions to failure in resistance training: A Bayesian analysis. European Journal of Sport Science. 2023;23(7):1203-1213. Epub 2022 Jun 30. doi: 10.1080/17461391.2022.2089915



Mitter B, Csapo R, Bauer P, Tschan H. Reproducibility of strength performance and strength-endurance profiles: A test-retest study. PLoS ONE. 2022 May;17(5):e0268074. doi: 10.1371/journal.pone.0268074


Triska C, Moitzi AM, Tschan H, Mathy A, Wessner B. A high dose of isomaltulose alters immune cells count after prolonged cycling exercise. In Dela F, Piacentini MF, Helge JW, Calvo Lluch A, Sáez E, Pareja Blanco F, Tsokoladis E, editors, 27th Annual Congress of the European College of Sport Science: Book of Abstracts. ECSS. 2022

Hauer R, Tessitore A, Hauer K, Tschan H. Activity Profile of International Female Lacrosse Players. Journal of Strength and Conditioning Research. 2021 Nov;35(11):3207-3212. Epub 2019 Jul 22. doi: 10.1519/JSC.0000000000003253

Prinz B, Dieter S, Tschan H, Nimmerichter A. Aerobic and Anaerobic Power Distribution During Cross-Country Mountain Bike Racing. International Journal of Sports Physiology and Performance. 2021 Nov;16(11):1610-1615. Epub 2021 Apr 12. doi: 10.1123/ijspp.2020-0758


Ciocca G, Tschan H, Tessitore A. Effects of Post-Activation Performance Enhancement (PAPE) Induced by a Plyometric Protocol on Deceleration Performance. Journal of Human Kinetics. 2021 Oct;80(1):5-16. doi: 10.2478/hukin-2021-0085

Boshnjaku A, Krasniqi E, Tschan H, Wessner B. ACTN3 Genotypes and Their Relationship with Muscle Mass and Function of Kosovan Adults. International Journal of Environmental Research and Public Health. 2021 Sept;18(17):9135. doi: 10.3390/ijerph18179135

Prinz B, Zöger M, Tschan H, Nimmerichter A. Oxygen Uptake Kinetics in Endurance Trained Youth and Adult Cyclists. Journal of Sports Science and Medicine. 2021 Sept;20(3):398-403. doi: 10.52082%2Fjssm.2021.398

Mitter B, Hölbling D, Bauer P, Stöckl M, Baca A, Tschan H. Concurrent Validity of Field-Based Diagnostic Technology Monitoring Movement Velocity in Powerlifting Exercises. Journal of Strength and Conditioning Research. 2021 Aug;35(8):2170–2178. Epub 2019 Apr. doi: 10.1519/JSC.0000000000003143

Reif A, Wessner B, Haider P, Tschan H, Triska C. Strength Performance Across the Oral Contraceptive Cycle of Team Sport Athletes: A Cross-Sectional Study. Frontiers in Physiology. 2021 Jul 1;12:658994. 658994. doi: 10.3389/fphys.2021.658994

Boshnjaku A, Bahtiri A, Feka K, Krasniqi Boshnjaku E, Tschan H, Wessner B. Test-retest reliability data of functional performance, strength, peak torque and body composition assessments in two different age groups of Kosovan adults. Data in Brief. 2021 Jun;36:106988. doi: 10.1016/j.dib.2021.106988

Hauer R, Störchle P, Karsten B, Tschan H, Baca A. Internal, external and repeated-sprint demands in small-sided games: A comparison between bouts and age groups in elite youth soccer players. PLoS ONE. 2021 Apr 28;16(4):e0249906. doi: 10.1371/journal.pone.0249906

Tishukaj F, Shalaj I, Gjaka M, Wessner B, Tschan H. Lower Limb Force and Power Production and Its Relation to Body Composition in 14-to 15-Year-Old Kosovan Adolescents. Advances in Physical Education. 2021 Feb 8;11:61-81. doi: 10.4236/ape.2021.111005

Analyse der Olympischen Sommerspiele Tokio und die SPLISS Studie als Denkanstoß für eine zukünftige strategische Vorgehensweise.

Tschan, H. (Speaker)

17 Nov 2021

Activity: Talks and presentationsTalk or oral contributionScience to Science


Bilanz und Analyse der Olympischen Spiele in Tokio aus österreichischer Sicht.

Tschan, H. (Speaker)

11 Nov 2021

Activity: Talks and presentationsTalk or oral contributionScience to Science


Analysis of the decision-making times in repeated agility trials: a pilot study.

Ciocca, G. (Speaker), Tessitore, A. (Speaker) & Tschan, H. (Speaker)

Sept 2021

Activity: Talks and presentationsTalk or oral contributionScience to Science


Predicting the 1-RM from individualized load-velocity and strength-endurance relationships. ECSS Virtual Congress 2021

Mitter, B. (Speaker), Bauer, P. (Speaker) & Tschan, H. (Speaker)

Sept 2021

Activity: Talks and presentationsTalk or oral contributionScience to Science


Training and Exercise Performance.

Tschan, H. (Speaker)

13 Jul 2021

Activity: Talks and presentationsTalk or oral contributionScience to Science


Educate and Integrate?! Intercultural Education in Physical Education and Sport Coaching.

Tschan, H. (Speaker)

2 Mar 2021

Activity: Talks and presentationsTalk or oral contributionScience to Science


Sense Wave Posturography

Tschan, H. (Speaker)

20 Nov 2020

Activity: Talks and presentationsTalk or oral contributionScience to Science


Die Olympischen Spiele in Tokio 2021 – eine Herausforderung nicht nur wegen der Pandemie

Tschan, H. (Speaker)

17 Nov 2020

Activity: Talks and presentationsTalk or oral contributionScience to Public


The Systematic Training Process in Long-Term Athletic Development

Tschan, H. (Speaker)

30 Oct 2020

Activity: Talks and presentationsTalk or oral contributionScience to Science


Training and Exercise Performance

Tschan, H. (Speaker)

28 Jul 2020

Activity: Talks and presentationsTalk or oral contributionScience to Public


Akklimatisation und Wetter - Olympische Spiele Tokio 2021

Tschan, H. (Speaker)

19 Jun 2020

Activity: Talks and presentationsTalk or oral contributionScience to Public


Aspekte der Lateral Rebound Trainings mit dem "Triple Trampoline"

Tschan, H. (Speaker)

21 Oct 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Reliable Methods to Assess Sport Performance

Tschan, H. (Speaker)

9 Oct 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Health Related Aspects of Endurance Exercise and Training

Tschan, H. (Speaker)

8 Oct 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Locomotor Apparatus (Bones) Adaptation in Response to Health-Enhancing Physical Exercise

Tschan, H. (Speaker)

8 Oct 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


BSO TrainerInnen Fortbildung

Tschan, H. (Speaker), Mitter, B. (Speaker), Hauer, R. (Speaker) & Scharner, M. (Speaker)

31 Aug 20191 Sept 2019

Activity: Talks and presentationsTalk or oral contributionScience to Public


Non-motorized treadmill sprinting power is related to over-ground sprinting performance in elite team sports athletes

Scharner, M. (Speaker), Triska, C. (Speaker) & Tschan, H. (Speaker)

5 Jul 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Die Entwicklung von Körpermasse, BMI und Hüftumfang von Österreichischen Stellungspflichtigen von 2007-2016

Stocker, H. M. (Speaker) & Tschan, H. (Speaker)

25 Apr 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Zusammenhang zwischen vertikalen Sprungparametern und Sprintleistung unter Labor- und Feldbedingungen bei Sportstudenten/innen

Scharner, M. (Speaker), Wirth, K. (Speaker), Triska, C. (Speaker) & Tschan, H. (Speaker)

25 Apr 2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Effects of low or high amounts of dietary protein and resistance training on muscle quality of older adults: a randomized controlled trial

Unterberger, S. (Speaker), Fiornovelli, G. (Speaker), Franzke, B. (Speaker), Zöhrer, P. A. (Speaker), Draxler, A. (Speaker), Tschan, H. (Speaker) & Wagner, K.-H. (Speaker)

2019

Activity: Talks and presentationsTalk or oral contributionScience to Science


Reliable methods to assess sports performance

Tschan, H. (Invited speaker)

30 Nov 2018

Activity: Talks and presentationsTalk or oral contributionScience to Science


Physical Activity Patterns and Public Health Recommendations for the General Population

Tschan, H. (Invited speaker)

26 Oct 2018

Activity: Talks and presentationsTalk or oral contributionScience to Science


Themenbereich Weltraumforschung - Der Mensch im All - Raumfahrtmedizin

Tschan, H. (Invited speaker)

29 Sept 2018

Activity: Talks and presentationsTalk or oral contributionScience to Public


Prevalence of sarcopenia based on EWGSOP criteria and population specific cutpoints in adults aged 60 and above in Kosovo

Boshnjaku, A. (Speaker), Bahtiri, A. (Contributor), Feka, K. (Contributor), Krasniqi, E. (Contributor), Tschan, H. (Contributor) & Wessner, B. (Contributor)

4 Jul 20187 Jul 2018

Activity: Talks and presentationsTalk or oral contributionScience to Science


Präsentation der Studienergebnisse „Climb High“

Tschan, H. (Invited speaker) & Triska, C. (Invited speaker)

20 Mar 2018

Activity: Talks and presentationsTalk or oral contributionScience to Science


Tschan H. Use it or lose it – Körperliche Aktivität und Gesundheitsförderung

Tschan, H. (Invited speaker)

20 Mar 2018

Activity: Talks and presentationsTalk or oral contributionScience to Public


Trainingswissenschaftliche Aspekte der Verletzungs- und Überlastungsprävention im Fußball

Tschan, H. (Invited speaker)

27 Feb 2018

Activity: Talks and presentationsTalk or oral contributionScience to Science


Körperliche Aktivität und Gesundheit: Von der Weltraumforschung zur Alltagswelt "Welche Schlüsse ziehen wir für unser alltägliches Leben?"

Tschan, H. (Invited speaker)

25 Jan 2018

Activity: Talks and presentationsTalk or oral contributionScience to Science


COMBINING STRENGTH AND POWER TRAINING: A SYSTEMATIC REVIEW OF FINDINGS FROM COMPLEX TRAINING STUDIES

Bauer, P. (Speaker), Übellacker, F. (Contributor), Mitter, B. (Contributor), Seitz, L. (Contributor) & Tschan, H. (Contributor)

1 Dec 2017

Activity: Talks and presentationsTalk or oral contributionScience to Science


Mitarbeitervortrag - Bewegungsförderung am Arbeitsplatz

Bauer, P. (Speaker), Zellinger, M. (Contributor), Binder, N. (Contributor) & Tschan, H. (Contributor)

1 Oct 2017

Activity: Talks and presentationsTalk or oral contributionScience to Public


Bewegungsförderung am Arbeitsplatz

Bauer, P. (Speaker), Zellinger, M. (Contributor), Binder, N. (Contributor) & Tschan, H. (Contributor)

26 Sept 201729 Sept 2017

Activity: Talks and presentationsTalk or oral contributionScience to Public



Use it or lose it - Die Bedeutung der körperlichen Aktivität für Gesundheit und Fitness

Tschan, H. (Invited speaker)

8 Aug 2017

Activity: Talks and presentationsTalk or oral contributionScience to Public


Elastic band resistance training induces extracellular matrix genes in skeletal muscle of older females as evaluated by RNA sequencing

Wessner, B. (Speaker), Tosevska, A. (Contributor), Hofmann, M. (Contributor), Franzke, B. (Contributor), Schober-Halper, B. (Contributor), Oesen, S. (Contributor), Tschan, H. (Contributor), Strasser, E.-M. (Contributor) & Wagner, K.-H. (Contributor)

5 Jul 20178 Jul 2017

Activity: Talks and presentationsTalk or oral contributionScience to Science


Reliability and validity of field-based strength tests for elderly to be used in younger Kosovan adults

Boshnjaku, A. (Speaker), Bahtiri, A. (Contributor), Feka, K. (Contributor), Krasniqi, E. (Contributor), Tschan, H. (Contributor) & Wessner, B. (Contributor)

5 Jul 20178 Jul 2017

Activity: Talks and presentationsTalk or oral contributionScience to Science


"Und los!" - Bewegungszeiten und Bewegungsintensitäten im Sportunterricht mit Schwerpunkt Basketball, Fußball und Völkerball

Kolb, M. (Speaker), Rath, A.-M. (Speaker), Dobiasch, M. (Speaker), Tschan, H. (Speaker) & Baca, A. (Speaker)

16 Jun 2017

Activity: Talks and presentationsTalk or oral contributionScience to Science


Technische Ausbildung von Spitzengeigern und Spitzensportlern

Tschan, H. (Invited speaker) & Kuschnir, B. (Invited speaker)

9 Jun 2017

Activity: Talks and presentationsTalk or oral contributionScience to Public


Resistance Exercise Training to Counteract Strength Loss in Long-Term Spaceflight. From Space Station Mir Flights to Experiment Mars 500.

Tschan, H. (Keynote speaker)

28 May 20172 Jun 2017

Activity: Talks and presentationsTalk or oral contributionScience to Science


Posturographie in der Leistungsdiagnostik und im Training

Tschan, H. (Invited speaker)

18 May 2017

Activity: Talks and presentationsTalk or oral contributionScience to Public


Health Enhancing Physical Activity in Pre-School and School-Aged Children in Europe

Tschan, H. (Speaker)

11 Nov 201612 Nov 2016

Activity: Talks and presentationsTalk or oral contributionOther


Leben in Balance - Gleichgewichtstraining als Sturzprophylaxe

Tschan, H. (Speaker)

11 Nov 2016

Activity: Talks and presentationsTalk or oral contributionOther


Analyse der Ergebnisse des Team Austria bei den Olympischen Spielen 2016 Rio im internationalen Kontext

Tschan, H. (Speaker)

2016 → …

Activity: Talks and presentationsTalk or oral contributionOther


Essentials of Training Strength, Power and Speed

Tschan, H. (Speaker)

11 Dec 2015

Activity: Talks and presentationsTalk or oral contributionOther


Physical Activity Patterns and Public Health Recommendations for the General Population

Tschan, H. (Speaker)

21 Nov 2015

Activity: Talks and presentationsTalk or oral contributionOther


Methods of Fitness Assessment

Tschan, H. (Speaker)

19 Oct 2015

Activity: Talks and presentationsTalk or oral contributionOther


Principles of Fitness-Wellness: Health Benefits of Endurance Training

Tschan, H. (Speaker)

19 Oct 2015

Activity: Talks and presentationsTalk or oral contributionOther


Locomotor apparatus (bones) adaptation in response to health anhancing physical exercise.

Tschan, H. (Speaker)

16 Oct 2015

Activity: Talks and presentationsTalk or oral contributionOther



Influence of additional physical education hours on physical fitness and motor competence in children

Tschan, H. (Speaker)

10 Sept 2015

Activity: Talks and presentationsTalk or oral contributionOther


Injury incidence and injury patterns of elite-level male soccer players in Kosovo.

Shalaj, I. (Speaker), Tishukaj, F. (Contributor), Gashi, F. (Contributor), Gjaka, M. (Contributor), Bachl, N. (Contributor), Wessner, B. (Contributor), Csapo, R. (Contributor) & Tschan, H. (Contributor)

24 Jun 201527 Jun 2015

Activity: Talks and presentationsTalk or oral contributionScience to Science


Intermediate Progress Report Tempus Speed Project

Tschan, H. (Speaker)

17 May 2015

Activity: Talks and presentationsTalk or oral contributionOther


Use it or Lose it - Der ständige Kampf gegen Muskelabbau

Tschan, H. (Speaker)

18 Apr 2015

Activity: Talks and presentationsTalk or oral contributionOther


Resistance Exercise with Blood-Flow Restriction - An Effective Method to Induce Gains in Muscle Mass

Tschan, H. (Speaker)

10 Apr 2015

Activity: Talks and presentationsTalk or oral contributionOther


Exercise Assessment and Program Design for Fitness and Health

Tschan, H. (Speaker)

20 Mar 2015

Activity: Talks and presentationsTalk or oral contributionOther


Sport Professions in Albania, Kosovo and Serbia - Survey Report

Tschan, H. (Speaker)

5 Feb 2015

Activity: Talks and presentationsTalk or oral contributionOther


Resistance Exercise Training: Health and Performance Effects

Tschan, H. (Speaker)

10 Jan 2015

Activity: Talks and presentationsTalk or oral contributionOther


Endurance and agility profile between male soccer players of different age categories.

Shalaj, I. (Speaker), Tishukaj, F. (Contributor), Gjaka, M. (Contributor), Ademi, B. (Contributor), Pllana, A. (Contributor), Wessner, B. (Contributor), Csapo, R. (Contributor) & Tschan, H. (Contributor)

2 Jul 20145 Jul 2014

Activity: Talks and presentationsTalk or oral contributionScience to Science




Wie abgehoben ist die Space-Forschung

Tschan, H. (Speaker)

17 Jun 2011

Activity: Talks and presentationsTalk or oral contributionOther


Resistance Exercise Modes and Cellular Signalling Pathways in Skeletal Muscle

Tschan, H. (Speaker)

28 Oct 2010

Activity: Talks and presentationsTalk or oral contributionOther


Resistance Exercise Training to Counteract Muscle Atrophy and Strength Loss in Long Term Spaceflight

Tschan, H. (Speaker)

28 Oct 2010

Activity: Talks and presentationsTalk or oral contributionOther


Einfluß von Alter und Training auf kardiale Biomarker

Tschan, H. (Speaker)

3 Dec 2009

Activity: Talks and presentationsTalk or oral contributionOther


Gentherapie und Gendoping

Tschan, H. (Speaker)

3 Dec 2009

Activity: Talks and presentationsTalk or oral contributionOther


Praxisseminar - Krafttraining

Tschan, H. (Speaker)

28 Nov 2009

Activity: Talks and presentationsTalk or oral contributionOther


Cardiac injury markers following strenuous endurance and strength exercise.

Tschan, H. (Speaker)

5 Nov 2009

Activity: Talks and presentationsTalk or oral contributionOther


Muscle Strength in Microgravity - Implications for Exercise Countermeasures in Space and their Earth Benefits.

Tschan, H. (Speaker)

5 Nov 2009

Activity: Talks and presentationsTalk or oral contributionOther


Endurance Training System with Human Parameter Biofeedback.

Tschan, H. (Speaker)

27 Oct 2009

Activity: Talks and presentationsTalk or oral contributionOther


Health benefits of endurance training

Tschan, H. (Speaker)

29 Sept 2009

Activity: Talks and presentationsTalk or oral contributionOther


Health benefits of strength training

Tschan, H. (Speaker)

29 Sept 2009

Activity: Talks and presentationsTalk or oral contributionOther


Locomotor apparatus adaptation in response to health enhancing physical activity

Tschan, H. (Speaker)

29 Sept 2009

Activity: Talks and presentationsTalk or oral contributionOther


Research methods in fitness assessment

Tschan, H. (Speaker)

29 Sept 2009

Activity: Talks and presentationsTalk or oral contributionOther


Eccentric resistance training as a countermeasure in microgravity.

Tschan, H. (Speaker)

1 Sept 2009

Activity: Talks and presentationsTalk or oral contributionOther


Age-Related Development of Biological - and Performance Indices of Austrian Soccer Players

Tschan, H. (Speaker)

24 Jun 2009

Activity: Talks and presentationsTalk or oral contributionOther


Influence of Competitive Lifting Tasks on Plasma Concentration of Biochemical Cardiac markers

Tschan, H. (Speaker)

24 Jun 2009

Activity: Talks and presentationsTalk or oral contributionOther


Urinary Excretion of 8-Hydroxy-2'Deoxyguanosine as a biomarker of Oxidative Stress in Ultra-Marathon Runners

Tschan, H. (Speaker)

24 Jun 2009

Activity: Talks and presentationsTalk or oral contributionOther


MDS - Multifunctional Dynamometer for Use in Space - Training and Diagnostics in Microgravity

Tschan, H. (Speaker)

7 Jun 2009

Activity: Talks and presentationsTalk or oral contributionOther


Doping im Breitensport

Tschan, H. (Speaker)

12 May 2009

Activity: Talks and presentationsTalk or oral contributionOther


ETS (Endurance Training System with Biofeedback for Ded Rest) : Bed Rest Strategy

Tschan, H. (Speaker)

8 Apr 2009

Activity: Talks and presentationsTalk or oral contributionOther


From Performance Related Fitness of Elite Athletes to Health-Related Muscular Fitness throughout the Life Span.

Tschan, H. (Speaker)

2 Feb 2009

Activity: Talks and presentationsTalk or oral contributionOther


Principles of Fitness - Wellness. Health benefits of strength training

Tschan, H. (Speaker)

3 Oct 2008

Activity: Talks and presentationsTalk or oral contributionOther


Locomotor apparatur (bones) adaptation in response to health-enhancing physical exercise

Tschan, H. (Speaker)

5 Oct 2007

Activity: Talks and presentationsTalk or oral contributionOther


Principles of Fitness - Wellness. Health benefits of strength training : Health benefits of strength training

Tschan, H. (Speaker)

5 Oct 2007

Activity: Talks and presentationsTalk or oral contributionOther


Research methods in fitness assessment

Tschan, H. (Speaker)

5 Oct 2007

Activity: Talks and presentationsTalk or oral contributionOther


Locomotor Apparatus (Bones) Adaptation in Response to Health-Enhancing Physical Exercise

Tschan, H. (Speaker)

27 Oct 2006

Activity: Talks and presentationsTalk or oral contributionOther


Locomotor Apparatus (Bones) Adaptation in Response to Health-Enhancing Physical Exercise

Tschan, H. (Speaker)

24 Oct 2006

Activity: Talks and presentationsTalk or oral contributionOther


Health Benefits of Strength Training - European Master in Health and Physical Activity

Tschan, H. (Speaker)

20 Oct 2006

Activity: Talks and presentationsTalk or oral contributionOther


Ist Langstreckenlauf wirklich gesund

Tschan, H. (Speaker)

1 Aug 2006

Activity: Talks and presentationsTalk or oral contributionOther


Influence of ultra-endurance exercise on plasma concentration of biochemical cardiac markers diseases

Tschan, H. (Speaker)

14 Jun 2006

Activity: Talks and presentationsTalk or oral contributionOther


Using genetics to promote sporting activities and thus help prevent diseases

Tschan, H. (Speaker)

14 Jun 2006

Activity: Talks and presentationsTalk or oral contributionOther


Krafttraining im Kindes- und Jugendalter

Tschan, H. (Speaker)

19 Apr 2006

Activity: Talks and presentationsTalk or oral contributionOther


Sport, Health, and the People - A Western Balkan University Network (SHAPE)

Wessner, B. (Project Lead), Baca, A. (Co-Lead), Tschan, H. (Co-Lead) & Bachl, N. (Co-Lead)

1/12/2330/11/26

Project: Educational funding


Physical fitness, anthropometric and nutritional status of young Kosovan adults - an 8-yr follow-up study

Wessner, B. (Project Lead), Tschan, H. (Co-Lead), Tishukaj, F. (Co-Lead) & Ushtelenca, K. (Co-Lead)

1/07/2131/12/22

Project: Research funding


Intercultural Education through Physical Activity, Coaching and Training

Tschan, H. (Project Lead)

1/01/1831/03/21

Project: Educational funding


TEMPUS SPEED

Tschan, H. (Project Lead) & Bachl, N. (Co-Lead)

1/12/1330/11/16

Project: Research funding


Department of Sport and Human Movement Science

Auf der Schmelz 6 (USZ I)
1150 Wien
Room: 2.I/05

T: +43-1-4277-48862

harald.tschan@univie.ac.at