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See detailL'utilisation politique de l'histoire par le Parlement européen
Spirinelli, Fabio UL

Article for general public (2019)

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See detailThe Utility of Complex Problems in University Selection
Stadler, Matthias UL; Greiff, Samuel UL

Scientific Conference (2014, April 30)

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See detailA utility-based dynamic demand estimation model that explicitly accounts for activity scheduling and duration
Cantelmo, Guido UL; Viti, Francesco UL; Nigro, Marialisa et al

in Transportation Research. Part A, Policy and Practice (2018)

This paper proposes a Dynamic Demand Estimation (DODE) framework that explicitly accounts for activity scheduling and duration. By assuming a Utility-Based departure time choice model, the time-dependent ... [more ▼]

This paper proposes a Dynamic Demand Estimation (DODE) framework that explicitly accounts for activity scheduling and duration. By assuming a Utility-Based departure time choice model, the time-dependent OD flow becomes a function, whose parameters are those of the utility function(s) within the departure time choice model. In this way, the DODE is solved using a parametric approach, which, on one hand, has less variables to calibrate with respect to the classical bi-level formulation while, on the other hand, it accounts for different trip purposes. Properties of the model are analytically and numerically discussed, showing that the model is more suited for estimating the systematic component of the demand with respect to the standard GLS formulation. Differently from similar approaches in literature, which rely on agent-based microsimulators and require expensive survey data, the proposed framework is applicable with all those DTA models, which are based on OD matrix, and do not necessarily need any data at user level. This has been proven by applying the proposed approach with a standard macroscopic realistic Dynamic Traffic Assignment (DTA) [less ▲]

Detailed reference viewed: 87 (1 UL)
See detailUtility-Based Kalman Filtering for real-time estimation of daily demand flows
Cantelmo, Guido UL; Qurashi, Moeid; Prakash, Arun et al

Scientific Conference (2018)

Time-dependent Origin-Destination (OD) demand flows are fundamental inputs for Dynamic Traffic Assignment (DTA) systems and real-time traffic management. This work introduces a novel state-space framework ... [more ▼]

Time-dependent Origin-Destination (OD) demand flows are fundamental inputs for Dynamic Traffic Assignment (DTA) systems and real-time traffic management. This work introduces a novel state-space framework to estimate these demand flows in an online context. Specifically, we propose to explicitly include trip-chaining behavior within the state-space formulation, which is solved using the well-established Kalman Filtering technique. While existing works already consider structural information and recursive behavior within the online demand estimation problem, this information has been always considered at the OD level. In this study, we introduce this structural information by explicitly representing trip-chaining within the estimation framework. The advantage is twofold. First, all trips belonging to the same tour can be jointly calibrated. Second, given the estimation during a certain time interval, a prediction of the structural deviation over the whole day can be obtained without the need to run additional simulations. The effectiveness of the proposed methodology is demonstrated first on a toy network and then on a large real-world network. Results show that the model improves the prediction performance with respect to a conventional Kalman Filtering approach. We also show that, on the basis of the estimation of the morning commute, the model can be used to predict the evening commute without need of running additional simulations. [less ▲]

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See detailUtilization of drug sales data for the epidemiology of chronic diseases: the example of diabetes
Papoz, L.; De Beaufort, Carine UL

in Epidemiology (Cambridge, Mass.) (1993), 4

An indirect method for estimating the prevalence rates of chronic diseases that are treated by specific drugs was proposed in 1988 to European countries in the framework of a European Community concerted ... [more ▼]

An indirect method for estimating the prevalence rates of chronic diseases that are treated by specific drugs was proposed in 1988 to European countries in the framework of a European Community concerted action on diabetes epidemiology. Data on consumption of antidiabetic drugs were collected at the national level in nine countries and at a regional level in two. Using official drug sales data and recent demographic data, we estimated the diabetes prevalence rates in each country or region. The estimated diabetes prevalence in Europe varied from 1.6% in Northern Ireland to 4.7% in Malta. In four countries that already had diabetes prevalence data, the estimation through drug consumption provided figures 3-20% lower than those from field surveys. This study showed a large variety of prescribing habits for diabetic patients in Europe (for example, the proportion of insulin-treated patients varies from 13% to 36%) and underscores the need for a consensus on antidiabetic treatments based on valid clinical research. The proposed approach does not replace field surveys but provides an inexpensive and practical marker of disease frequency and therapeutic attitudes over space and time. [less ▲]

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See detailUtilization of Scenarios in European Electricity Policy: The Ten-Year Network Development Plan
Scheibe, Alexander UL

in OIES Paper (2018)

The transformation of the European Union’s energy sector poses a number of challenges to the European electricity system. Above all, both the anticipated increase of intermittent electricity from ... [more ▼]

The transformation of the European Union’s energy sector poses a number of challenges to the European electricity system. Above all, both the anticipated increase of intermittent electricity from renewable sources and the completion of the internal energy market while guaranteeing a secure supply require an extensive development of electricity infrastructure at the European level. Nevertheless, Europe’s future electricity system entails numerous uncertainties. For example, the definite amount and the location of both electricity generation and consumption are unpredictable. In order to address these ambiguities, the European Network of Transmission System Operators for Electricity (ENTSO-E) develops the two-yearly Ten-Year Network Development Plan (TYNDP). By exploring different plausible future paths using scenarios, the TYNDP aims to identify key infrastructure projects – namely transmission lines and cross-border interconnectors – for the future electricity system. In this capacity, the TYNDP is the central planning tool for European grid infrastructure. This paper explores whether the TYNDP effectively provides a solid planning foundation for future grid investments. For this end, the TYNDPs 2012-2018 are investigated in the light of European energy policies, and their utilization by stakeholders is scrutinized. The paper argues that an existing policy congruence and the strong link to the Projects of Common Interest (PCI) confine the TYNDP solely to the hardware of the electricity system. This in turn profoundly limits the TYNDP’s effectiveness as a strategic planning tool. Hence, a closer connection to the software components of the anticipated European electricity system – namely the future market design and (European) regulations – would further allow for a holistic planning and evaluation of future electricity infrastructure projects. [less ▲]

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See detailUtilizing Dynamic Hazard Knowledge for Risk Sensitive Action Planning of Autonomous Robots
Ertle, P.; Voos, Holger UL; Soeffker, D.

in IEEE Int. Symposium on Robotics and Sensor Environments ROSE, Magdeburg, Germany, 2012 (2012)

Autonomous robots are required to perform tasks in complex and dynamic environments. For this class of systems, traditional safety assuring methods are not satisfying due to the unknown effects of the ... [more ▼]

Autonomous robots are required to perform tasks in complex and dynamic environments. For this class of systems, traditional safety assuring methods are not satisfying due to the unknown effects of the interacting system with an open environment. Briefly speaking: What is not known during the development phase can not be adequately considered. In order to tackle this problem, it is proposed to extend the safety measures with the so-called dynamic risk assessment. Therefore, the anticipatory capability of a Cognitive Technical System, the so-called mental action space, is utilized. The mental action space, a learned internal representation for possible courses of action, is dynamically assessed. The proposed dynamic risk assessment module provides this functionality. The core are quantitative risk models, so-called ‘safety principles’, which can be specified during the system’s design stage without losing the possibility to be adjusted or extended during the system’s operating time. Finally, an exemplary application of the approach shows a robot, enabled to safely plan and perform its tasks concerning risks arising due to interaction of robot and environment. [less ▲]

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See detailUtilizing the Krafft phenomenon to generate ideal micelle-free surfactant-stabilized nanoparticle suspensions
Dölle, Sarah; Lechner, Bob-Dan; Park, Ji Hyun et al

in Angewandte Chemie International Edition (2012), 51(13), 3254-3257

Detailed reference viewed: 94 (0 UL)
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See detailUtilizing the Spatial Information Provided by Channel Norm Feedback in SDMA Systems
Hammarwall, David; Bengtsson, Mats; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2008), 56(7), 32783293

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See detailUWB Joint TOA and DOA estimation
Lagunas, Eva UL; Najar, Montse; Navarro, Monica

in IEEE International Conference on UWB, Vancouver, Canada, 9-11 September, 2009. (2009)

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See detailA UX Approach to Privacy and Security: the Impact of User, Contextual and System-Related Factors
Distler, Verena UL; Lallemand, Carine UL; Koenig, Vincent UL

in CHI Workshop Exploring Individual Diffferences in Privacy (2018, April)

This position paper lays out current and future studies which we conduct on the UX aspects of security and privacy, our goal being to understand which factors influence privacy-related decision-making. We ... [more ▼]

This position paper lays out current and future studies which we conduct on the UX aspects of security and privacy, our goal being to understand which factors influence privacy-related decision-making. We advocate using UX design methods in order to study interindividual differences, system-related and contextual factors involved in privacy and security attitudes and behaviors. These results will contribute to user-tailored and personalized privacy initiatives and guide the design of future technologies. [less ▲]

Detailed reference viewed: 263 (16 UL)
See detailUX-Maturity: Mensch im Fokus, Erfolg im Visier
Rohles, Björn UL

Article for general public (2021)

User experience (UX) is a key success factor in the design of digital products and services. However, companies and other organizations are at different stages when it comes to aligning their processes ... [more ▼]

User experience (UX) is a key success factor in the design of digital products and services. However, companies and other organizations are at different stages when it comes to aligning their processes for a positive UX. UX maturity models help to identify where an organization stands in terms of UX maturity. How can companies use this to systematically design for positive UX and turn it into business advantages? [less ▲]

Detailed reference viewed: 62 (2 UL)
See detailUX-Testing im Guerilla-Style
Rohles, Björn UL

Article for general public (2019)

Testing the usability and user experience of digital products and services (e.g. websites or apps) usually involves a lot of effort. But this does not necessarily have to be the case: small tests are ... [more ▼]

Testing the usability and user experience of digital products and services (e.g. websites or apps) usually involves a lot of effort. But this does not necessarily have to be the case: small tests are better than none. Especially if they are lean, fast and agile. A look at the powerful tactics of guerrilla UX testing. [less ▲]

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See detailV wie Verschiebung
Heimböckel, Dieter UL

Article for general public (2012)

Detailed reference viewed: 66 (0 UL)
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See detailV-REP & ROS Testbed for Design, Test, and Tuning of a Quadrotor Vision Based Fuzzy Control System for Autonomous Landing
Olivares Mendez, Miguel Angel UL; Kannan, Somasundar UL; Voos, Holger UL

in Porceedings of The International Micro Air Vehicle Conference and Competition 2014 (2014, August)

This paper focuses on the use of the Virtual Robotics Experimental Platform (V-REP) and the Robotics Operative System (ROS) working in parallel for design, test, and tuning of a vision based control ... [more ▼]

This paper focuses on the use of the Virtual Robotics Experimental Platform (V-REP) and the Robotics Operative System (ROS) working in parallel for design, test, and tuning of a vision based control system to command an Unmanned Aerial Vehicle (UAV). Here, is presented how to configure the V-REP, and ROS to work in parallel, and how to use the developed packages in ROS for the pose estimation based on vision and for the design and use of a fuzzy logic control system. It is also shown in this paper a novel vision based fuzzy control approach for the autonomous landing task on a static and on a moving platform. The control system is based on four fuzzy logic controllers (FLC) working in parallel on an external control loop based on the visual information. All the controllers were designed and tuned to command the vertical, longitudinal, lateral, and heading velocities of the UAV. [less ▲]

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See detailV2me: Evaluating the first steps in mobile friendship coaching
Muuraiskangas, Salla; Leist, Anja UL; Braun, Andreas et al

in Journal of Ambient Intelligence and Smart Environments, in press (2012), 4(6), 517-534

Life events, such as retirement or being widowed, can change the social circle of older people considerably. It may be difficult to find new social contacts when one has never got used to, or perhaps even ... [more ▼]

Life events, such as retirement or being widowed, can change the social circle of older people considerably. It may be difficult to find new social contacts when one has never got used to, or perhaps even never learnt, to seek and maintain those contacts. Loneliness has many negative effects for well-being, including depression and even cardiovascular disease. The Ambient Assisted Living Joint Programme (AAL-JP) research project V2me seeks to find a solution for alleviating loneliness by means of easy-to-use technology including touch screen devices. The idea is to use a virtual coach for encouraging users to take an active role in contacting people and teaching them how to initiate and maintain meaningful and enduring relations. The first step, in the process of creating the complete virtual coach-assisted system for preventing loneliness, is to create a prototype and use the feedback from older users for developing the system. In this paper we discuss the results of the first pilot and what steps need to be taken next. [less ▲]

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See detailV76D mutation in a conserved gD-crystallin region leads to dominant cataracts in mice.
Graw, Jochen; Loster, Jana; Soewarto, Dian et al

in Mammalian Genome : Official Journal of the International Mammalian Genome Society (2002), 13(8), 452-5

During a large-scale ENU mutagenesis screen, a mouse mutant with a dominant cataract was detected and referred to as Aey4. Aim of this study was the morphological description of the mutant, the mapping of ... [more ▼]

During a large-scale ENU mutagenesis screen, a mouse mutant with a dominant cataract was detected and referred to as Aey4. Aim of this study was the morphological description of the mutant, the mapping of the mutation, and the characterization of the underlying molecular lesion. The slit-lamp examination revealed a strong nuclear cataract surrounded by a homogeneous milky opacity in the inner cortex. The histological analysis demonstrated remnants of cell nuclei throughout the entire lens. The mutation was mapped to Chromosome 1 by a genome-wide linkage making the six gamma-crystallin encoding genes and the closely linked betaA2-crystallin encoding gene to relevant candidate genes. Finally, a T-->A exchange in exon 2 of the gammaD-crystallin encoding gene (symbol: Crygd) was demonstrated to be causative for the cataract phenotype; this particular mutation is, therefore, referred to Crygo(Aey4). The alteration in codon 76 leads to an amino acid exchange of Val-->Asp. Val at this position is highly conserved; it is found in all mouse and rat gammaD/E/F-crystallins as well as in the human gammaA- and gammaD-crystallins. It may be replaced solely by Ile, which is present in all bovine gamma-crystallins, in the rat and mouse gammaA/B/C-crystallins, as well as in the human gammaB/C-crystallins. It is predicted that the exchange of a hydrophobic side chain by a polar and acidic one might influence the microenvironment by a dramatic decrease of the isoelectric point by 1.5 pH units in the 10 amino acids surrounding position 76. The Crygd(Aey4) additionally demonstrates the importance of the integrity of the Cryg gene cluster for lens transparency. [less ▲]

Detailed reference viewed: 106 (1 UL)
See detailVad är det för mening med livslångt lärande inte har någon mening? Från en lärande ekonomi till den lärande demokratin
Biesta, Gert UL

in Nät och bildning.Tidskrift för folkbildningens flexibla lärande (2006), 3

Detailed reference viewed: 256 (0 UL)