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- Lehrstuhl für Volkswirtschaftslehre, insbesondere Wirtschafts- und Verkehrspolitik (Univ.-Prof. Dr. Dr. h.c. Andreas Knorr) (181)
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Learning from history?
(2018)
Hochschulen sind geschichtsbewusste Institutionen. Doch anders als noch im 19. Jahrhundert kann die akademische Erinnerungskultur heute keine ungebrochene Feier von Kontinuität, des Stolzes auf große Wissenschaftler oder der Idee einer selbstbewussten Korporation mehr sein. Diese Form der Erinnerung setzte primär auf Traditionspflege. Sie ist unter Druck geraten, zum einen durch die Desaster des 20. Jahrhunderts und die Verstrickung der Hochschulen darin, zum anderen durch eine erhebliche Professionalisierung der Hochschulgeschichtsschreibung. Infolgedessen ist die deutsche Hochschulgeschichte des 20. Jahrhunderts oft in besonders geringer Weise dazu geeignet, hochschulische Institutionengeschichte als Erzählung eines fortwährenden Aufstiegs der jeweiligen Einrichtung zu konstruieren. Damit müssen Hochschulen heute umgehen können, was ihnen jedoch recht uneinheitlich gelingt – erkennbar z.B. an der unterschiedlich ausgeprägten Souveränität, mit der auf zeitgeschichtsbezogene Skandalisierungen hochschulgeschichtlicher Tatbestände reagiert wird. Zugrunde liegt dem eine eher erratische Beschäftigung mit der je eigenen Zeitgeschichte. Für diese gibt es Gründe: • Hochschulen lassen zwar organisationspolitisch eine intensive Befassung mit ihrer Zeitgeschichte erwarten: Auf diesem Wege ist Legitimation zu gewinnen, können Jubiläen aufgewertet werden und kann Havarien in der Kommunikation mit der Öffentlichkeit vorgebeugt werden. • Doch organisationspraktisch überwiegen die Gründe dafür, dass intensivere Befassungen mit der eigenen Zeitgeschichte eher unerwartbar sinWissenschaftsfreiheit, individuelle Autonomie, mangelnde Durchgriffsmöglichkeiten von Hochschulleitungen, Konflikte um Ressourcen, Planungsresistenz und unsystematisches Entscheidungsverhalten – all das steht dem entgegen. Dies lässt sich auf Basis einer empirischen Untersuchung aller 54 ostdeutschen Hochschulen – eben jenen Hochschulen, die aufgrund ihrer DDR-Geschichte unter besonderer Beobachtung des Umgangs mit ihrer Zeitgeschichte stehen – nachvollziehbar machen. Dabei erfolgt hier eine Konzentration auf die Hochschulanlagen, also die Gebäude und Campusensembles, da in und auf diesen im alltäglichen Vollzug von Forschung und Lehre die Geschichte im wörtlichen Sinne präsent ist. Das betrifft zum einen die architektonischen Zeugnisse der DDR in Gestalt von Hochschulgebäuden und -anlagen, die zum großen Teil auch als Repräsentationsobjekte angelegt waren, sowie deren überkommene künstlerische Beschriftungen durch Wandbilder und -mosaike, Plastiken und Installationen. Zum anderen betrifft es nach 1989 errichtete oder angebrachte Denkmale und Gedenkzeichen als Zeugnisse der oder/und Aufforderungen zur historischen Reflexion. In der pflegenden Erhaltung überkommener Zeugnisse, der Abwahl von als unwürdig Bewertetem und der Errichtung neuer zeichenhafter Artefakte konstruieren die Hochschulen ihr Gedächtnis, indem sie aus den objektiven Abläufen der Vergangenheit Gedächtniswürdiges auswählen. Die vorzustellende Bestandsaufnahme zeigt, wie sich die ostdeutschen Hochschulen mit ihrer DDR-Geschichte im Raum auseinandersetzen, illustriert dies an diesbezüglichen exemplarischen Konflikten und setzt dies ins Verhältnis zum Umgang mit Zeugnissen aus der NS-Periode. Die empirischen Grundlagen ermöglichen hierbei sowohl quantitativ gestützte Begründungen als auch qualitative Deutungen. Sie führen zur Identifikation von drei Zugangsweisen, die Hochschulen im Umgang mit ihrer Zeitgeschichte wählen: • Geschichtsabstinenz • Geschichte als Tradition und Geschichtspolitik als Hochschulmarketing • Geschichte als Aufarbeitung und Selbstaufklärung Anhand dessen lassen sich zum einen die spezifische Vorstellung von der Institution Hochschule, die – gegen überwältigende empirische Befunde – spezifische demokratische Widerstandspotenziale in der akademischen Kultur und Organisation vermutet, und zum anderen der Topos vom „Lernen aus der Geschichte“ prüfen.
Student Space Control
(2018)
The role of the city changed within the knowledge economy. Knowledge has become the most important resource of urban prosperity and universities are considered the hope of city development (Van Winden 2009). Previous research has elaborated various dimensions in which universities interact with their home cities (or regions). They refer to economic impacts (e.g. Behr 2004; Florida 2006; Van Winden 2007; Gabe 2012), differ between forms of the spatial and structural integration of the university into the area (e.g. Larkham 2000; Kunzmann 2004; Gerhard 2012) or focus on social impacts of universities in the urban environment (e.g. Chatterton 1999; Sage et al. 2011; Smith 2004; Smith/Hubbard 2014; Gerhard, Hoelscher & Wilson 2017). All of these rely on a specific concept of space. However, they are lacking the neutral consideration of a fundamental factor of city development in university towns: students as urban agents (Russo/Tatjer 2007). Students constitute a considerable part of the population in university cities. As such, they need to play a key role in the analysis of the urban space. Drawing on a systematic literature review (Machi & McEvoy 2016), it is shown within this presentation that whenever students are subject to urban studies, either their role is conceptualized with a negative connotation (‘Studentification’: most important Smith 2004, 2008) or mainly depicted as leading to urban devaluation. As a counter draft to the prevailing approaches, the concept of ‘Student Urbanity’ (Steinmueller 2015) is introduced as an unbiased approach to the analysis of students as a source of urban processes of change. Using official (urban) statistics as well as observations and maps, the presentation highlights the results of a comparative case study, which exploratively tested this model in the cities of Heidelberg (Germany) and Montpellier (France) (Steinmüller 2015). Starting with the identification of distribution patterns of students’ residences, urban areas with a significantly high share of them are analysed with regard to the following research questions: - Which (social-)structural and spatial characteristics can be observed in these areas? - How do the students shape the urban space and infrastructure within the detected areas? - Which tendencies of revaluation respectively devaluation emerge from this influence? The presentation makes an empirical case for ‘Student Urbanity’ showing the relations between urban space and university with regard to students as agents of the development. It concludes with the discussion of this new student role as potential sources of reurbanisation as well as urban inequalities.
Campus design and estate management: concepts and challenges from an international perspective
(2018)
The university is an ancient and successful concept which, until very recently, has usually been associated with a particular locus, e. g. at a single, fairly homogenous site, or as a collection of buildings in a town or city built over time. Some institutions have been planned in their entirety from predominantly one architectural drawing board (e.g. University of Lausanne at Dorigny), others have started out as a small idea (e.g. the first college quadrangle in Oxford) and have since grown to become something quite different from the original, e.g.in Oxford there are now over 40 colleges, Science Park, university hospitals etc. Architectural trends have also played their part in university construction e.g. neo-Gothic (19th century), Brutalist (20th century) or the German Marburg University building system of the 1960s, which was emulated by many other institutions. Irrespective of style, university buildings are loaded with meaning and yet we frequently take them for granted and do not consider how they might impact on our capacity to learn and teach. It is only when we are disturbed by construction work that we are irritated into taking any real notice of our physical environment. Yet subliminally we are undoubtedly affected by our surroundings, which are not fixed, but change to become objects of “(re)interpretation, narration and representation […]” (Gieryn, 2002, p.35). This is a sense-making process as we negotiate how to act within them (Weick, 1995). Buildings impact on our well-being and how we thrive, which should be of key importance to the academic world in which creativity and innovation are of such importance (Marmot, in Temple (ed.) 2014). When higher education estate fails, and there are many examples of this, it is as much “a failure of psychology as of design” (de Botton, 2006/2014, p. 248). However, we do not have much data on the processes and ideas behind the creation (or adaptation) of higher education estate (cf. Bligh, in Temple (ed.) 2014). This research therefore asks the following questions: How do those who make decisions about higher education buildings take psychological well-being, or learning capability into account? Do they make compromises on the quality of materials? How do different countries and their university leaders address and govern the processes behind the creation and management of higher education estate of various types and age? What are current trends and challenges to higher education estate? Employing a constructivist perspective, this ongoing international research examines notions of value, care and identity (Tse et al, 2015) and analyses how an institution’s strategic capacity and organisational capability impacts on how estate is managed (cf. Thoenig & Paradeise, 2016). It uses case studies (Yin, 6th ed., 2018) from different institutional types in Great Britain, Switzerland, Austria, Germany and China which have been selected according to a strategic capacity model. Alongside documentary research and online data-gathering, interviews onsite have been conducted with a range of stakeholders, including leaders, planners, faculty and students. The research aims to theorise how an important and costly part of university administration is being managed in the context of today’s teaching and learning needs.
Technologies for the IoT have reached a high level of maturity, and a largescale deployment will soon be possible. For the IoT to become an economic success, easy access to all kinds of real-world information must be enabled. Assuming that not all services will be available for free, an IoT infrastructure should support access control, accounting, and billing. We analyze available access control and payment schemes for their potential as payment schemes in the IoT. In addition to security and privacy, we discuss suitability for direct client to sensor communication and efficiency.
We show shortcomings of existing protocols that need to be addressed by future research.
The importance of frequent backups is uncontroversial. Their creation is simpler than ever today thanks to widespread availability of cheap cloud storage. Common backup solutions, however, tend to be either insecure, inflexible or inefficient in typical backup scenarios.
In this paper, we present triviback, a lightweight and almost trivial, yet powerful solution for outsourcing backups to untrusted cloud storage. Based on recent research results on secure data deduplication, triviback combines strong confidentiality, authenticity and availability guarantees with flexibility and efficiency in terms of low storage and communication costs: Triviback supports efficient preservation of many backup states with storage costs comparable to state-of-the-art version control systems-while supporting full storage reclamation on deletion of arbitrary backup states.
We discuss its security, publish an implementation and perform an extensive evaluation of storage and communication costs.
We present sec-cs, a hash-table-like data structure for contents on untrusted storage that is provably secure and storage-efficient. We achieve authenticity and confidentiality with zero storage overhead using deterministic authenticated encryption. State-of-the-art data deduplication approaches prevent redundant storage of shared parts of different contents irrespective of whether relationships between contents are known a priori.
Instead of just adapting existing approaches, we introduce novel (multi-level) chunking strategies, ML-SC and ML-CDC, which are significantly more storage-efficient than existing approaches in presence of high redundancy.
We prove sec-cs's security, publish an implementation, and present evaluation results indicating suitability for, e.g., future backup systems that should preserve many versions of files on little available storage.
With Home Automation Systems steadily gaining popularity and affordability, the threat of attacks on these installations is increasing.
Previous research has shown that passive adversaries can obtain considerable amounts of information about the users' habits and about how they interact with their system. Although encryption and other measures to ensure condentiality in communication are becoming a standard, traffic analysis remains an unsolved problem. In this paper, we take a look at different research areas and show that existing solutions cannot be easily applied to this scenario. However, we establish a model for traffic analysis in Home Automation Systems which leverages existing research on Private Information Retrieval. Using this model, both attacks and countermeasures can be analysed and their effectiveness can be measured to yield comparable results. We also take a look at legal aspects, highlighting problem areas and recent developments in the interaction between technology such as Home Automation and legislature.
Reputation systems are useful to assess the trustworthiness of potential transaction partners, but also a potential threat to privacy since rating profiles reveal users’ preferences. Anonymous reputation systems resolve this issue, but make it difficult to assess the trustworthiness of a rating. We introduce a privacy-preserving reputation system that enables anonymous ratings while making sure that only authorized users can issue ratings. In addition, ratings can be endorsed by other users. A user who has received a pre-defined number of endorsements can prove this fact, and be rewarded e.g. by receiving a “Premium member” status. The system is based on advanced cryptographic primitives such as Chaum-Pedersen blind signatures, verifiable secret sharing and oblivious transfer.
Der Vortrag auf der ICON Konferenz 2017 in Glasgow untersuchte wie vor dem EuGH verweise auf Vertrauensschutz benutzt wurden, um Weitergabe von Dokumenten anch Verordnung 1049/2001 zu bewilligen oder zu verweigern.
The function and role of legal expert at ministry level of European states is very different. The following considerations focus on two major states of central European administration style, France and Germany.
Vortrag gehalten auf der CES Konferenz 2017 in Glasgow zum e-government in der europäischen Zollunion.
Inuit and Subjects in EU law
(2017)
Vortrag auf der ICON Konferenz 2017 in Kopenhagen zur Konstruktion des EU Rechtssubjekts anhand der Inuit Rechtsprechung des EuGH