@phdthesis{Herrmann2013,
  author    = {Herrmann, Christian},
  title     = {Robotic Motion Compensation for Applications in Radiation Oncology},
  isbn      = {978-3-923959-88-4},
  doi       = {10.25972/OPUS-6727},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-79045},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2013},
  abstract  = {Aufgrund vieler Verbesserungen der Behandlungsmethoden im Laufe der letzten 60 Jahre, erlaubt die Strahlentherapie heutzutage pr{\"a}zise Behandlungen von statischen Tumoren. Jedoch birgt die Bestrahlung von sich bewegenden Tumoren noch große Herausforderungen in sich, da bewegliche Tumore oft den Behandlungsstrahl verlassen. Dabei reduziert sich die Strahlendosis im Tumor w{\"a}hrend sich diese im umliegenden gesunden Gewebe erh{\"o}ht. Diese Forschungsarbeit zielt darauf ab, die Grenzen der Strahlentherapie zu erweitern, um pr{\"a}zise Behandlungen von beweglichen Tumoren zu erm{\"o}glichen. Der Fokus der Arbeit liegt auf der Erstellung eines Echtzeitsystems zur aktiven Kompensation von Tumorbewegungen durch robotergest{\"u}tzte Methoden. W{\"a}hrend Behandlungen befinden sich Patienten auf einer Patientenliege, mit der statische Lagerungsfehler vor Beginn einer Behandlung korrigiert werden. Die in dieser Arbeit verwendete Patientenliege "HexaPOD" ist ein paralleler Manipulator mit sechs Freiheitsgraden, der große Lasten innerhalb eines eingeschr{\"a}nkten Arbeitsbereichs pr{\"a}zise positionieren kann. Obwohl der HexaPOD urspr{\"u}nglich nicht f{\"u}r dynamische Anwendungen konzipiert wurde, wird dieser f{\"u}r eine dauerhafte Bewegungskompensation eingesetzt, in dem Patienten so bewegt werden, dass Tumore pr{\"a}zise im Zentralstrahl w{\"a}hrend der Dauer einer gesamten Behandlung verbleiben. Um ein echtzeitf{\"a}higes Kompensationssystem auf Basis des HexaPODs zu realisieren, muss eine Reihe an Herausforderungen bew{\"a}ltigt werden. Echtzeitaspekte werden einerseits durch die Verwendung eines harten Echtzeitbetriebssystems abgedeckt, andererseits durch die Messung und Sch{\"a}tzung von Latenzzeiten aller physikalischen Gr{\"o}ßen im System, z.B. Messungen der Tumor- und Atemposition. Neben der konsistenten und durchg{\"a}ngigen Ber{\"u}cksichtigung von akkuraten Zeitinformation, werden alle software-induzierten Latenzen adaptiv ausgeglichen. Dies erfordert Vorhersagen der Tumorposition in die nahe Zukunft. Zahlreiche Pr{\"a}diktoren zur Atem- und Tumorpositionsvorhersage werden vorgeschlagen und anhand verschiedenster Metriken evaluiert. Erweiterungen der Pr{\"a}diktionsalgorithmen werden eingef{\"u}hrt, die sowohl Atem- als auch Tumorpositionsinformationen fusionieren, um Vorhersagen ohne explizites Korrelationsmodell zu erm{\"o}glichen. Die Vorhersagen bestimmen den zuk{\"u}nftigen Bewegungspfad des HexaPODs, um Tumorbewegungen zu kompensieren. Dazu werden verschiedene Regler entwickelt, die eine Trajektorienverfolgung mit dem HexaPOD erm{\"o}glichen. Auf der Basis von linearer und nicht-linearer dynamischer Modellierung des HexaPODs mit Methoden der Systemidentifikation, wird zun{\"a}chst ein modellpr{\"a}diktiver Regler entwickelt. Ein zweiter Regler wird auf Basis einer Annahme {\"u}ber das Arbeitsprinzip des internen Reglers im HexaPOD entworfen. Schließlich wird ein dritter Regler vorgeschlagen, der beide vorhergehenden Regler miteinander kombiniert. F{\"u}r jeden dieser Regler werden vergleichende Ergebnisse aus Experimenten mit realer Hardware und menschlichen Versuchspersonen pr{\"a}sentiert und diskutiert. Dar{\"u}ber hinaus wird die geeignete Wahl von freien Parametern in den Reglern vorgestellt. Neben einer pr{\"a}zisen Verfolgung der Referenztrajektorie spielt der Patientenkomfort eine entscheidende Rolle f{\"u}r die Akzeptanz des Systems. Es wird gezeigt, dass die Regler glatte Trajektorien realisieren k{\"o}nnen, um zu garantieren, dass sich Patienten wohl f{\"u}hlen w{\"a}hrend ihre Tumorbewegung mit Genauigkeiten im Submillimeterbereich ausgeglichen wird. Gesamtfehler werden im Kompensationssystem analysiert, in dem diese zu Trajektorienverfolgungsfehlern und Pr{\"a}diktionsfehlern in Beziehung gesetzt werden. Durch Ausnutzung von Eigenschaften verschiedener Pr{\"a}diktoren wird gezeigt, dass die Startzeit des Systems bis die Verfolgung der Referenztrajektorie erreicht ist, wenige Sekunden betr{\"a}gt. Dies gilt insbesondere f{\"u}r den Fall eines initial ruhenden HexaPODs und ohne Vorwissen {\"u}ber Tumorbewegungen. Dies zeigt die Eignung des Systems f{\"u}r die sehr kurz fraktionierten Behandlungen von Lungentumoren. Das Tumorkompensationssystem wurde ausschließlich auf Basis von klinischer Standard-Hardware entwickelt, die in vielen Behandlungsr{\"a}umen zu finden ist. Durch ein einfaches und flexibles Design k{\"o}nnen Behandlungsr{\"a}ume in kosteneffizienter Weise um M{\"o}glichkeiten der Bewegungskompensation erg{\"a}nzt werden. Dar{\"u}ber hinaus werden aktuelle Behandlungsmethoden wie intensit{\"a}tsmodulierte Strahlentherapie oder Volumetric Modulated Arc Therapy in keiner Weise eingeschr{\"a}nkt. Aufgrund der Unterst{\"u}tzung verschiedener Kompensationsmodi kann das System auf alle beweglichen Tumore angewendet werden, unabh{\"a}ngig davon ob die Bewegungen vorhersagbar (Lungentumore) oder nicht vorhersagbar (Prostatatumore) sind. Durch Integration von geeigneten Methoden zur Tumorpositionsbestimmung kann das System auf einfache Weise zur Kompensation von anderen Tumoren erweitert werden.},
  subject      = {Robotik},
  language  = {en}
}
@phdthesis{Herrler2007,
  author    = {Herrler, Rainer},
  title     = {Agentenbasierte Simulation zur Ablaufoptimierung in Krankenh{\"a}usern und anderen verteilten, dynamischen Umgebungen},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-24483},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2007},
  abstract  = {Verteilte dynamische Systeme unter lokalen und globalen Gesichtspunkten zu optimieren ist eine schwierige Aufgabe. Zwar sind grunds{\"a}tzliche Auswirkungen einzelner Maßnahmen h{\"a}ufig bekannt, durch widerstrebende Ziele, Wechselwirkungen zwischen Prozessen und Nebenwirkungen von Maßnahmen ist ein analytisches Vorgehen bei der Optimierung nicht m{\"o}glich. Besonders schwierig wird es, wenn lokale Einheiten einerseits ihre Ziele und Autonomie behalten sollen, aber durch zentrale Vorgaben bzw. Anreize so gesteuert werden sollen, dass ein {\"u}bergeordnetes Ziel erreicht wird. Ein praktisches Beispiel dieses allgemeinen Optimierungsproblems findet sich im Gesundheitswesen. Das Management von modernen Kliniken ist stets mit dem Problem konfrontiert, die Qualit{\"a}t der Pflege zu gew{\"a}hrleisten und gleichzeitig kosteneffizient zu arbeiten. Hier gilt es unter gegeben Rahmenbedingungen und bei Respektierung der Autonomie der Funktionseinheiten, Optimierungsmaßnahmen zu finden und durchzuf{\"u}hren. Vorhandene Werkzeuge zur Simulation und Modellierung bieten f{\"u}r diese Aufgabe keine ausreichend guten Vorgehensmodelle und Modellierungsmechanismen. Die agentenbasierte Simulation erm{\"o}glicht die Abbildung solcher Systeme und die Durchf{\"u}hrung von Simulationsexperimenten zur Bewertung einzelner Maßnahmen. Es werden L{\"o}sungswege und Werkzeuge vorgestellt und evaluiert, die den Benutzer bei der Formalisierung des Wissens und der Modellierung solch komplexer Szenarien unterst{\"u}tzen und ein systematisches Vorgehen zur Optimierung erm{\"o}glichen.},
  subject      = {Simulation},
  language  = {de}
}
@article{HentschelKobsHotho2022,
  author    = {Hentschel, Simon and Kobs, Konstantin and Hotho, Andreas},
  title     = {CLIP knows image aesthetics},
  series = {Frontiers in Artificial Intelligence},
  volume    = {5},
  journal   = {Frontiers in Artificial Intelligence},
  issn      = {2624-8212},
  doi       = {10.3389/frai.2022.976235},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-297150},
  year      = {2022},
  abstract  = {Most Image Aesthetic Assessment (IAA) methods use a pretrained ImageNet classification model as a base to fine-tune. We hypothesize that content classification is not an optimal pretraining task for IAA, since the task discourages the extraction of features that are useful for IAA, e.g., composition, lighting, or style. On the other hand, we argue that the Contrastive Language-Image Pretraining (CLIP) model is a better base for IAA models, since it has been trained using natural language supervision. Due to the rich nature of language, CLIP needs to learn a broad range of image features that correlate with sentences describing the image content, composition, environments, and even subjective feelings about the image. While it has been shown that CLIP extracts features useful for content classification tasks, its suitability for tasks that require the extraction of style-based features like IAA has not yet been shown. We test our hypothesis by conducting a three-step study, investigating the usefulness of features extracted by CLIP compared to features obtained from the last layer of a comparable ImageNet classification model. In each step, we get more computationally expensive. First, we engineer natural language prompts that let CLIP assess an image's aesthetic without adjusting any weights in the model. To overcome the challenge that CLIP's prompting only is applicable to classification tasks, we propose a simple but effective strategy to convert multiple prompts to a continuous scalar as required when predicting an image's mean aesthetic score. Second, we train a linear regression on the AVA dataset using image features obtained by CLIP's image encoder. The resulting model outperforms a linear regression trained on features from an ImageNet classification model. It also shows competitive performance with fully fine-tuned networks based on ImageNet, while only training a single layer. Finally, by fine-tuning CLIP's image encoder on the AVA dataset, we show that CLIP only needs a fraction of training epochs to converge, while also performing better than a fine-tuned ImageNet model. Overall, our experiments suggest that CLIP is better suited as a base model for IAA methods than ImageNet pretrained networks.},
  language  = {en}
}
@phdthesis{Henjes2010,
  author    = {Henjes, Robert},
  title     = {Performance Evaluation of Publish/Subscribe Middleware Architectures},
  doi       = {10.25972/OPUS-4536},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-53388},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2010},
  abstract  = {While developing modern applications, it is necessary to ensure an efficient and performant communication between different applications. In current environments, a middleware software is used, which supports the publish/subscribe communication pattern. Using this communication pattern, a publisher sends information encapsulated in messages to the middleware. A subscriber registers its interests at the middleware. The monograph describes three different steps to determine the performance of such a system. In a first step, the message throughput performance of a publish/subscribe in different scenarios is measured using a Java Message Service (JMS) based implementation. In the second step the maximum achievable message throughput is described by adapted models depending on the filter complexity and the replication grade. Using the model, the performance characteristics of a specific system in a given scenario can be determined. These numbers are used for the queuing model described in the third part of the thesis, which supports the dimensioning of a system in realistic scenarios. Additionally, we introduce a method to approximate an M/G/1 system numerically in an efficient way, which can be used for real time analysis to predict the expected performance in a certain scenario. Finally, the analytical model is used to investigate different possibilities to ensure the scalability of the maximum achievable message throughput of the overall system.},
  subject      = {Middleware},
  language  = {en}
}
@article{HeinWienrichLatoschik2021,
  author    = {Hein, Rebecca M. and Wienrich, Carolin and Latoschik, Marc E.},
  title     = {A systematic review of foreign language learning with immersive technologies (2001-2020)},
  series = {AIMS Electronics and Electrical Engineering},
  volume    = {5},
  journal   = {AIMS Electronics and Electrical Engineering},
  number    = {2},
  doi       = {10.3934/electreng.2021007},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-268811},
  pages     = {117-145},
  year      = {2021},
  abstract  = {This study provides a systematic literature review of research (2001-2020) in the field of teaching and learning a foreign language and intercultural learning using immersive technologies. Based on 2507 sources, 54 articles were selected according to a predefined selection criteria. The review is aimed at providing information about which immersive interventions are being used for foreign language learning and teaching and where potential research gaps exist. The papers were analyzed and coded according to the following categories: (1) investigation form and education level, (2) degree of immersion, and technology used, (3) predictors, and (4) criterions. The review identified key research findings relating the use of immersive technologies for learning and teaching a foreign language and intercultural learning at cognitive, affective, and conative levels. The findings revealed research gaps in the area of teachers as a target group, and virtual reality (VR) as a fully immersive intervention form. Furthermore, the studies reviewed rarely examined behavior, and implicit measurements related to inter- and trans-cultural learning and teaching. Inter- and transcultural learning and teaching especially is an underrepresented investigation subject. Finally, concrete suggestions for future research are given. The systematic review contributes to the challenge of interdisciplinary cooperation between pedagogy, foreign language didactics, and Human-Computer Interaction to achieve innovative teaching-learning formats and a successful digital transformation.},
  language  = {en}
}
@article{HeinLatoschikWienrich2022,
  author    = {Hein, Rebecca M. and Latoschik, Marc Erich and Wienrich, Carolin},
  title     = {Inter- and transcultural learning in cocial virtual reality: a proposal for an inter- and transcultural virtual object database to be used in the implementation, reflection, and evaluation of virtual encounters},
  series = {Multimodal Technologies and Interaction},
  volume    = {6},
  journal   = {Multimodal Technologies and Interaction},
  number    = {7},
  issn      = {2414-4088},
  doi       = {10.3390/mti6070050},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-278974},
  year      = {2022},
  abstract  = {Visual stimuli are frequently used to improve memory, language learning or perception, and understanding of metacognitive processes. However, in virtual reality (VR), there are few systematically and empirically derived databases. This paper proposes the first collection of virtual objects based on empirical evaluation for inter-and transcultural encounters between English- and German-speaking learners. We used explicit and implicit measurement methods to identify cultural associations and the degree of stereotypical perception for each virtual stimuli (n = 293) through two online studies, including native German and English-speaking participants. The analysis resulted in a final well-describable database of 128 objects (called InteractionSuitcase). In future applications, the objects can be used as a great interaction or conversation asset and behavioral measurement tool in social VR applications, especially in the field of foreign language education. For example, encounters can use the objects to describe their culture, or teachers can intuitively assess stereotyped attitudes of the encounters.},
  language  = {en}
}
@phdthesis{Heck2005,
  author    = {Heck, Klaus},
  title     = {Wireless LAN performance studies in the context of 4G networks},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-14896},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2005},
  abstract  = {Wireless communication is nothing new. The first data transmissions based on electromagnetic waves have been successfully performed at the end of the 19th century. However, it took almost another century until the technology was ripe for mass market. The first mobile communication systems based on the transmission of digital data were introduced in the late 1980s. Within just a couple of years they have caused a revolution in the way people communicate. The number of cellular phones started to outnumber the fixed telephone lines in many countries and is still rising. New technologies in 3G systems, such as UMTS, allow higher data rates and support various kinds of multimedia services. Nevertheless, the end of the road in wireless communication is far from being reached. In the near future, the Internet and cellular phone systems are expected to be integrated to a new form of wireless system. Bandwidth requirements for a rich set of wireless services, e.g.\ video telephony, video streaming, online gaming, will be easily met. The transmission of voice data will just be another IP based service. On the other hand, building such a system is by far not an easy task. The problems in the development of the UMTS system showed the high complexity of wireless systems with support for bandwidth-hungry, IP-based services. But the technological challenges are just one difficulty. Telecommunication systems are planned on a world-wide basis, such that standard bodies, governments, institutions, hardware vendors, and service providers have to find agreements and compromises on a number of different topics. In this work, we provide the reader with a discussion of many of the topics involved in the planning of a Wireless LAN system that is capable of being integrated into the 4th generation mobile networks (4G) that is being discussed nowadays. Therefore, it has to be able to cope with interactive voice and video traffic while still offering high data rates for best effort traffic. Let us assume a scenario where a huge office complex is completely covered with Wireless LAN access points. Different antenna systems are applied in order to reduce the number of access points that are needed on the one hand, while optimizing the coverage on the other. No additional infrastructure is implemented. Our goal is to evaluate whether the Wireless LAN technology is capable of dealing with the various demands of such a scenario. First, each single access point has to be capable of supporting best-effort and Quality of Service (QoS) demanding applications simultaneously. The IT infrastructure in our scenario consists solely of Wireless LAN, such that it has to allow users surfing the Web, while others are involved in voice calls or video conferences. Then, there is the problem of overlapping cells. Users attached to one access point produce interference for others. However, the QoS support has to be maintained, which is not an easy task. Finally, there are nomadic users, which roam from one Wireless LAN cell to another even during a voice call. There are mechanisms in the standard that allow for mobility, but their capabilities for QoS support are yet to be studied. This shows the large number of unresolved issues when it comes to Wireless LAN in the context of 4G networks. In this work we want to tackle some of the problems.},
  subject      = {Drahtloses lokales Netz},
  language  = {en}
}
@techreport{HasslingerNtougiasHasslingeretal.2023,
  type      = {Working Paper},
  author    = {Hasslinger, Gerhard and Ntougias, Konstantinos and Hasslinger, Frank and Hohlfeld, Oliver},
  title     = {Performance Analysis of Basic Web Caching Strategies (LFU, LRU, FIFO, ...) with Time-To-Live Data Validation},
  series = {KuVS Fachgespr{\"a}ch - W{\"u}rzburg Workshop on Modeling, Analysis and Simulation of Next-Generation Communication Networks 2023 (WueWoWAS'23)},
  journal   = {KuVS Fachgespr{\"a}ch - W{\"u}rzburg Workshop on Modeling, Analysis and Simulation of Next-Generation Communication Networks 2023 (WueWoWAS'23)},
  doi       = {10.25972/OPUS-32204},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-322048},
  pages     = {5},
  year      = {2023},
  abstract  = {Web caches often use a Time-to-live (TTL) limit to validate data consistency with web servers. We study the impact of TTL constraints on the hit ratio of basic strategies in caches of fixed size. We derive analytical results and confirm their accuracy in comparison to simulations. We propose a score-based caching method with awareness of the current TTL per data for improving the hit ratio close to the upper bound.},
  language  = {en}
}
@phdthesis{Hartmann2015,
  author    = {Hartmann, Matthias},
  title     = {Optimization and Design of Network Architectures for Future Internet Routing},
  issn      = {1432-8801},
  doi       = {10.25972/OPUS-11416},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-114165},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2015},
  abstract  = {At the center of the Internet's protocol stack stands the Internet Protocol (IP) as a common denominator that enables all communication. To make routing efficient, resilient, and scalable, several aspects must be considered. Care must be taken that traffic is well balanced to make efficient use of the existing network resources, both in failure free operation and in failure scenarios. Finding the optimal routing in a network is an NP-complete problem. Therefore, routing optimization is usually performed using heuristics. This dissertation shows that a routing optimized with one objective function is often not good when looking at other objective functions. It can even be worse than unoptimized routing with respect to that objective function. After looking at failure-free routing and traffic distribution in different failure scenarios, the analysis is extended to include the loop-free alternate (LFA) IP fast reroute mechanism. Different application scenarios of LFAs are examined and a special focus is set on the fact that LFAs usually cannot protect all traffic in a network even against single link failures. Thus, the routing optimization for LFAs is targeted on both link utilization and failure coverage. Finally, the pre-congestion notification mechanism PCN for network admission control and overload protection is analyzed and optimized. Different design options for implementing the protocol are compared, before algorithms are developed for the calculation and optimization of protocol parameters and PCN-based routing. The second part of the thesis tackles a routing problem that can only be resolved on a global scale. The scalability of the Internet is at risk since a major and intensifying growth of the interdomain routing tables has been observed. Several protocols and architectures are analyzed that can be used to make interdomain routing more scalable. The most promising approach is the locator/identifier (Loc/ID) split architecture which separates routing from host identification. This way, changes in connectivity, mobility of end hosts, or traffic-engineering activities are hidden from the routing in the core of the Internet and the routing tables can be kept much smaller. All of the currently proposed Loc/ID split approaches have their downsides. In particular, the fact that most architectures use the ID for routing outside the Internet's core is a poor design, which inhibits many of the possible features of a new routing architecture. To better understand the problems and to provide a solution for a scalable routing design that implements a true Loc/ID split, the new GLI-Split protocol is developed in this thesis, which provides separation of global and local routing and uses an ID that is independent from any routing decisions. Besides GLI-Split, several other new routing architectures implementing Loc/ID split have been proposed for the Internet. Most of them assume that a mapping system is queried for EID-to-RLOC mappings by an intermediate node at the border of an edge network. When the mapping system is queried by an intermediate node, packets are already on their way towards their destination, and therefore, the mapping system must be fast, scalable, secure, resilient, and should be able to relay packets without locators to nodes that can forward them to the correct destination. The dissertation develops a classification for all proposed mapping system architectures and shows their similarities and differences. Finally, the fast two-level mapping system FIRMS is developed. It includes security and resilience features as well as a relay service for initial packets of a flow when intermediate nodes encounter a cache miss for the EID-to-RLOC mapping.},
  subject      = {Netzwerk},
  language  = {en}
}
@article{HalbigLatoschik2021,
  author    = {Halbig, Andreas and Latoschik, Marc Erich},
  title     = {A systematic review of physiological measurements, factors, methods, and applications in virtual reality},
  series = {Frontiers in Virtual Reality},
  volume    = {2},
  journal   = {Frontiers in Virtual Reality},
  doi       = {10.3389/frvir.2021.694567},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-260503},
  year      = {2021},
  abstract  = {Measurements of physiological parameters provide an objective, often non-intrusive, and (at least semi-)automatic evaluation and utilization of user behavior. In addition, specific hardware devices of Virtual Reality (VR) often ship with built-in sensors, i.e. eye-tracking and movements sensors. Hence, the combination of physiological measurements and VR applications seems promising. Several approaches have investigated the applicability and benefits of this combination for various fields of applications. However, the range of possible application fields, coupled with potentially useful and beneficial physiological parameters, types of sensor, target variables and factors, and analysis approaches and techniques is manifold. This article provides a systematic overview and an extensive state-of-the-art review of the usage of physiological measurements in VR. We identified 1,119 works that make use of physiological measurements in VR. Within these, we identified 32 approaches that focus on the classification of characteristics of experience, common in VR applications. The first part of this review categorizes the 1,119 works by field of application, i.e. therapy, training, entertainment, and communication and interaction, as well as by the specific target factors and variables measured by the physiological parameters. An additional category summarizes general VR approaches applicable to all specific fields of application since they target typical VR qualities. In the second part of this review, we analyze the target factors and variables regarding the respective methods used for an automatic analysis and, potentially, classification. For example, we highlight which measurement setups have been proven to be sensitive enough to distinguish different levels of arousal, valence, anxiety, stress, or cognitive workload in the virtual realm. This work may prove useful for all researchers wanting to use physiological data in VR and who want to have a good overview of prior approaches taken, their benefits and potential drawbacks.},
  language  = {en}
}