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See detailTowards E-Conviviality in Web-Based Systems by considering the Wisdom of Crowds
Kaufmann, Sascha UL; Schommer, Christoph UL

in Abstract book of 2nd Conference on Agents and Artificial Intelligence (ICAART 2010) (2010)

Detailed reference viewed: 36 (7 UL)
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See detailTowards Effective Shell Modelling with the FEniCS Project
Hale, Jack UL; Baiz, P. M.

Scientific Conference (2013, March)

Fast and efficient simulations of shell structures are required in a wide range of engineering fields such as fluid-structure interaction and structural optimisation. Because of its expressive high-level ... [more ▼]

Fast and efficient simulations of shell structures are required in a wide range of engineering fields such as fluid-structure interaction and structural optimisation. Because of its expressive high-level form language UFL the FEniCS project is in an ideal position to tackle tough problems such as large deformations of non-isotropic shells. In this talk we will discuss some aspects of achieving this goal; generalised mixed formulations, reduction and projection operators for eliminating shear and membrane locking, the general shell model vs classical models and the recent work by Rognes et al. on manifolds. [less ▲]

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See detailTowards efficient dispersion of carbon nanotubes in thermotropic liquid crystals
Schymura, Stefan; Kühnast, Martin; Lutz, Vanessa et al

in Advanced Functional Materials (2010), 20(19), 3350-3357

Motivated by numerous recent reports indicating attractive properties of composite materials of carbon nanotubes (CNTs) and liquid crystals (LCs) and a lack of research aimed at optimizing such composites ... [more ▼]

Motivated by numerous recent reports indicating attractive properties of composite materials of carbon nanotubes (CNTs) and liquid crystals (LCs) and a lack of research aimed at optimizing such composites, the process of dispersing CNTs in thermotropic LCs is systematically studied. LC hosts can perform comparably or even better than the best known organic solvents for CNTs such as N-methyl pyrrolidone (NMP), provided that the dispersion process and choice of LC material are optimized. The chemical structure of the molecules in the LC is very important; variations in core as well as in terminal alkyl chain influence the result. Several observations moreover indicate that the anisotropic nematic phase, aligning the nanotubes in the matrix, per se stabilizes the dispersion compared to a host that is isotropic and thus yields random tube orientation. The chemical and physical phenomena governing the preparation of the dispersion and its stability are identified, taking into account enthalpic, entropic, as well as kinetic factors. This allows a guideline on how to best design and prepare CNT–LC composites to be sketched, following which tailored development of new LCs may take the advanced functional material that CNT–LC composites comprise to the stage of commercial application. [less ▲]

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See detailTowards Empirical Evaluation of Automated Risk Assessment Methods
Gadyatskaya, Olga UL; Labunets, Katsiaryna; Paci, Federica

in Risks and Security of Internet and Systems (2016)

Security risk assessment methods are numerous, and it might be confusing for organizations to select one. Researchers have conducted empirical studies with established methods in order to find factors ... [more ▼]

Security risk assessment methods are numerous, and it might be confusing for organizations to select one. Researchers have conducted empirical studies with established methods in order to find factors that influence their eff ectiveness and ease of use. In this paper we evaluate the recent TREsPASS semi-automated risk assessment method with respect to the factors identfii ed as critical in several controlled experiments. We also argue that automation of risk assessment raises new research questions that need to be thoroughly investigated in future empirical studies. [less ▲]

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See detailTowards Estimating and Predicting User Perception on Software Product Variants
Martinez, Jabier; Sottet, Jean-Sebastien; Garcia-Frey, Alfonso et al

in 17th International Conference on Software Reuse (ICSR) (2018, May)

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See detailTowards Europe 2020 out of the Economic Crisis: Is the Project Bond iniative a means to financial stability and integration?
Kavvadia, Helen UL

in Review of decentralization, local government and regional development (2013), 73

Since the establishment of the single monetary policy and introduction of the euro, it is pertinent to investigate the link between financial stability and integration. Is there a complementarity between ... [more ▼]

Since the establishment of the single monetary policy and introduction of the euro, it is pertinent to investigate the link between financial stability and integration. Is there a complementarity between the two or are financial stability and integration a contradiction in terms? In other words, isn't a search for a highly integrated financial system that would strengthen stability a bit like a search for the Holy Grail? Investment has been the cementing element of EU integration, institutions and policies - in brief, in creating more Europe. More concretely, investment in people, in knowledge and in physical assets, to ensure that Europe preserves its role and position in the world. The current crisis transcends national, even continental borders. Europe is reminded of its severity on a daily basis. Record unemployment is one of the consequences; shrinking public budgets and financial austerity another. In the run-up to the current recession investment grew by 5- 6% a years. Exporters and home buyers drove this expansion, which ended in 2008. Since then, the lack of investment has been a main source of demand weakness in the European Union. A collapse of investment activity of this magnitude has inevitable repercussions for economic expansion in the longer term. If productive capital stocks do not grow - indeed, if they are not even maintained - EU growth potential will inevitably shrink. A revival of investment activity is therefore is crucial to the long-term growth prospects of Europe. One precondition for such an investment revival is access to reasonably priced funding for long-term projects. The process of fiscal consolidation at national and European level has already placed a severe restriction on public budgets - and will continue to do so in the medium term. This pressure means that the EU has to find ways to achieve more with less. In particular, at European level, one needs to ensure that a limited EU budget is used to maximum effect. The newly established EU project bond initiative is seen as a means to go ahead in the current circumstances. As it does not impose an additional burden on domestic budgets, sovereign debt or contingent liabilities. The review looks into the type of investment that can be catered by the project bond initiative and the sectors selected for magnifying the growth potential. [less ▲]

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See detailTowards exact molecular dynamics simulations with machine-learned force fields
Chmiela, Stefan; Sauceda, Huziel E.; Müller, Klaus-Robert et al

in Nature Communications (2018), 9

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See detailTowards exposure of elusive metabolic mixed-culture processes: the application of metaproteomic analyses to activated sludge
Wilmes, Paul UL; Bond, P. L.

in Water Science & Technology (2006), 54(1), 217-226

4th IWA Activated Sludge Population Dynamics Conference (ASPD4) Location: Gold Coast, AUSTRALIA Date: JUL 17-20, 2005 Sponsor(s): IWA Specialist Grp Activated Sudge Populat Dynam; Adv Wastewater ... [more ▼]

4th IWA Activated Sludge Population Dynamics Conference (ASPD4) Location: Gold Coast, AUSTRALIA Date: JUL 17-20, 2005 Sponsor(s): IWA Specialist Grp Activated Sudge Populat Dynam; Adv Wastewater management Ctr; Australian Water Assoc Abstract: Protein expression is a direct reflection of specific microbial activities in any ecosystem. In order to assess protein expression in mixed microbial communities, the feasibility of applying proteomic techniques to activated sludge samples has recently been demonstrated. We report the application of metaproteomics to two activated sludges from a laboratory-scale sequencing batch reactor with dissimilar phosphorus removal performances. Fluorescence in situ hybridization (FISH) revealed that the sludge with good enhanced biological phosphorus removal performance (EBPR) was dominated by Betaproteobacteria (65% of EUBMIX binding cells) and gave positive signals for the Rhodocyclus-type PAO specific probe (59%). The non-EBPR sludge was dominated by tetrad-forming Alphaproteobacteria (75%). With regard to the proteomic investigation, 630 individual protein spots were matched across the replicate groups of the anaerobic and aerobic phases of the EBPR sludge with 9.4% of all spots being statistically different between the two phases. The non-EBPR metaproteomic maps exhibited 590 matched spots with 14.7% statistical differences between the two phases. Overall, the non-EBPR sludge expressed around 30% more significant differences than the EBPR sludge. The comparison of protein expression in the two sludges showed that their metaproteomes were substantially different and this was reflected in their microbial community structures and metabolic transformations. [less ▲]

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See detailTowards Feature-Oriented Fault Tree Analysis
Behringer, Benjamin UL; Lehser, Martina; Rothkugel, Steffen UL

in Proceedinfs of the 38th Annual IEEE Computer Software and Applications Conference (COMPSAC Workshops 2014) (2014)

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See detailTowards Flexible Evolution of Dynamically Adaptive Systems
Perrouin, Gilles UL; Morin, Brice; Chauvel, Franck et al

in New Ideas & Emerging Results Track of the International Conference of Software Engineering (NIER@ICSE) (2012, June)

Modern software systems need to be continuously available under varying conditions. Their ability adapt to their execution context is thus increasingly seen as a key to their success. Recently, many ... [more ▼]

Modern software systems need to be continuously available under varying conditions. Their ability adapt to their execution context is thus increasingly seen as a key to their success. Recently, many approaches were proposed to design and support the execution of Dynamically Adaptive Systems (DAS). However, the ability of a DAS to evolve is limited to the addition, update or removal of adaptation rules or reconfiguration scripts. These artifacts are very specific to the control loop managing such a DAS and runtime evolution of the DAS requirements may affect other parts of the DAS. In this paper, we argue to evolve all parts of the loop. We suggest leveraging recent advances in model-driven techniques to offer an approach that supports the evolution of both systems and their adaptation capabilities. The basic idea is to consider the control loop itself as an adaptive system. [less ▲]

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See detailTowards Formal Security Analysis of Industrial Control Systems
Rocchetto, Marco UL

in Towards Formal Security Analysis of Industrial Control Systems (2017)

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See detailTowards Forward Security Properties for PEKS and IBE
Tang, Qiang UL

in Information Security and Privacy - 20th Australasian Conference, ACISP 2015 (2015)

In cryptography, forward secrecy is a well-known property for key agreement protocols. It ensures that a session key will remain private even if one of the long-term secret keys is compromised in the ... [more ▼]

In cryptography, forward secrecy is a well-known property for key agreement protocols. It ensures that a session key will remain private even if one of the long-term secret keys is compromised in the future. In this paper, we investigate some forward security properties for Public-key Encryption with Keyword Search (PEKS) schemes, which allow a client to store encrypted data and delegate search operations to a server. The proposed properties guarantee that the client’s privacy is protected to the maximum extent even if his private key is compromised in the future. Motivated by the generic transformation from anonymous Identity-Based Encryption (IBE) to PEKS, we correspondingly propose some forward security properties for IBE, in which case we assume the attacker learns the master secret key. We then study several existing PEKS and IBE schemes, including a PEKS scheme by Nishioka, an IBE scheme by Boneh, Raghunathan and Segev, and an IBE scheme by Arriaga, Tang and Ryan. Our analysis indicates that the proposed forward security properties can be achieved by some of these schemes if the attacker is RO-non-adaptive (the attacker does not define its distributions based on the random oracle). Finally, we propose the concept of correlated-input indistinguishable hash function and show how to extend the Boyen-Waters anonymous IBE scheme to achieve the forward security properties against adaptive attackers. [less ▲]

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See detailTowards future III-nitride based THz OEICs in the UV range
Fox, Alfred; Mikulics, Martin; Winden, Andreas et al

in ASDAM 2012, The Ninth International Conference on Advanced Semiconductor Devices and Microsystems (2012)

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See detailTowards harmonization of proteomics methods. Implication for high resolution/accurate mass targeted methods.
Bourmaud, Adèle Gaëlle Annabelle UL

Doctoral thesis (2016)

Mass spectrometry plays a central role in proteomics studies which has allowed its expansion to biomedical research. In an effort to accelerate the understanding of the various aspects of protein biology ... [more ▼]

Mass spectrometry plays a central role in proteomics studies which has allowed its expansion to biomedical research. In an effort to accelerate the understanding of the various aspects of protein biology, the comparison and integration of results across laboratories have gained importance. However, the variety of laboratory-specific protocols, instruments, and data processing methods limits the reliability and reproducibility of the proteomics datasets. The harmonization of LC-MS based proteomics experiments is thus urgently needed to ensure that the workflows used are suitable for the intended purpose of the experiments and that they generate consistent and reproducible results. In a first step towards this harmonization, the critical components of each step of the workflow must be identified. Consolidated sample preparation methods with defined recovery and qualified platforms along with systematic assessment of their performance have to be established. They should ultimately rely on well-defined recommendations and reference materials. Towards these goals, the present project aimed to define, based on current proteomics practices and recent technologies, experimental protocols that will constitute reference methods for the community. The associated results will represent a baseline that can be used to benchmark workflows and platforms, and to conduct routine experiments. A quality control procedure was developed to routinely assess the uniformity of proteomics analyses. The combination of a simple protocol and the addition of reference materials at different stages of the workflow allowed a straightforward monitoring of both sample preparation and LC-MS performance. In addition, as high resolution/accurate mass instruments with fast scanning capabilities turned out to be particularly suited to targeted quantitative experiments, a significant part of the work has consisted in the evaluation of the capabilities offered by such mass spectrometers to promote good practice upon their inception. The methods developed based on these emerging technologies were compared to the existing workflows allowing recommendations to be made for their implementation for fit-for-purpose experiments. [less ▲]

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See detailTowards improved genome-scale metabolic network reconstructions: unification, transcript specificity and beyond.
Pfau, Thomas UL; Pacheco, Maria UL; Sauter, Thomas UL

in Briefings in bioinformatics (2015)

Genome-scale metabolic network reconstructions provide a basis for the investigation of the metabolic properties of an organism. There are reconstructions available for multiple organisms, from ... [more ▼]

Genome-scale metabolic network reconstructions provide a basis for the investigation of the metabolic properties of an organism. There are reconstructions available for multiple organisms, from prokaryotes to higher organisms and methods for the analysis of a reconstruction. One example is the use of flux balance analysis to improve the yields of a target chemical, which has been applied successfully. However, comparison of results between existing reconstructions and models presents a challenge because of the heterogeneity of the available reconstructions, for example, of standards for presenting gene-protein-reaction associations, nomenclature of metabolites and reactions or selection of protonation states. The lack of comparability for gene identifiers or model-specific reactions without annotated evidence often leads to the creation of a new model from scratch, as data cannot be properly matched otherwise. In this contribution, we propose to improve the predictive power of metabolic models by switching from gene-protein-reaction associations to transcript-isoform-reaction associations, thus taking advantage of the improvement of precision in gene expression measurements. To achieve this precision, we discuss available databases that can be used to retrieve this type of information and point at issues that can arise from their neglect. Further, we stress issues that arise from non-standardized building pipelines, like inconsistencies in protonation states. In addition, problems arising from the use of non-specific cofactors, e.g. artificial futile cycles, are discussed, and finally efforts of the metabolic modelling community to unify model reconstructions are highlighted. [less ▲]

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See detailTowards Integration on Colored Supermanifolds
Poncin, Norbert UL

in Banach Center Publications (2016, December), 110

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See detailTowards Intelligent Robot Assistants for the non-destructive Disassembly of End of Life Products
Jungbluth, Jan UL; Plapper, Peter UL; Gerke, Wolfgang

in Plapper, Peter; Hichri, Bassem (Eds.) Robotix-Academy Conference (2017, May 06)

The effective collaboration between humans and robots in complex and task rich environments like End of Life product disassembly depends on the ability of the robot to anticipate the workflow as well as ... [more ▼]

The effective collaboration between humans and robots in complex and task rich environments like End of Life product disassembly depends on the ability of the robot to anticipate the workflow as well as the assistance the human co-worker wants. Our approach towards such an intelligent system is the development of an informed software agent that controls the robot assistance behavior. We inform the agent with procedural and declarative knowledge about the disassembly domain through models of the product structure and actor/object models. The product structure is then transformed to a directed graph and used to build, share and define a goal-orientated coarse workflow. Depending on the tasks and wanted assistance, the system can generate adaptable and detailed workflows through searching in the situation space on the basis of predefined and task dependent actions. The created detailed workflow consists of a sequence of actions that are used to call, parameterize and execute robot programs for the fulfillment of the assistance. The aim of this research is to equip robot systems with higher cognitive skills to allow them to be autonomous in the performance of their assistance to improve the ergonomics of disassembly workstations. [less ▲]

Detailed reference viewed: 58 (1 UL)