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Peer Reviewed
See detailAn Extended Flexible Job Shop Scheduling Problem with Parallel Operations
Tessaro Lunardi, Willian UL; Voos, Holger UL

in ACM SIGAPP Applied Computing Review (2018), 18(2), 46-56

Traditional planning and scheduling techniques still hold important roles in modern smart scheduling systems. Realistic features present in modern manufacturing systems need to be incorporated into these ... [more ▼]

Traditional planning and scheduling techniques still hold important roles in modern smart scheduling systems. Realistic features present in modern manufacturing systems need to be incorporated into these techniques. Flexible job-shop scheduling problem (FJSP) is one of the most challenging combinatorial optimization problems. FJSP is an extension of the classical job shop scheduling problem where an operation can be processed by several different machines. In this paper, we consider the FJSP with parallel operations (EFJSP) and we propose and compare a discrete firefly algorithm (FA) and a genetic algorithm (GA) for the problem. Several FJSP and EFJSP instances were used to evaluate the performance of the proposed algorithms. Comparisons among our methods and state-of-the-art algorithms are also provided. The experimental results demonstrate that the FA and GA achieved improvements in terms of efficiency and efficacy. Solutions obtained by both algorithms are comparable to those obtained by algorithms with local search. In addition, based on our initial experiments, results show that the proposed discrete firefly algorithm is feasible, more effective and efficient than our proposed genetic algorithm for the considered problem. [less ▲]

Detailed reference viewed: 141 (22 UL)
Full Text
Peer Reviewed
See detailExtended higher spin holography and Grassmannian models
Creutzig, Thomas; Hikida, Yasuaki; Roenne, Peter Browne UL

in Journal of High Energy Physics (2013)

Detailed reference viewed: 136 (6 UL)
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Peer Reviewed
See detailExtended Load Model for Point Fitted Insulating Glass Units
Thibolt, Mike; Odenbreit, Christoph UL

Scientific Conference (2014, September 03)

An insulating glass unit (IGU) reacts to a change in temperature or barometric pressure with a change of its cavity’s gas pressure. This leads to the so called “climate loading” of the glass panes, which ... [more ▼]

An insulating glass unit (IGU) reacts to a change in temperature or barometric pressure with a change of its cavity’s gas pressure. This leads to the so called “climate loading” of the glass panes, which can be considered in the structural analysis for each pane as an external load, acting on both adjacent glass panes. In addition, an external loading onto the exterior pane, like a wind- or snow load, is distributed to all glass panes of the IGU due to mechanical coupling effects of the encapsulated gas between the panes. Glass breakage and/or demolished edge bonds may be caused. In this paper, an extension of an existing load model for linear supported IGUs to IGUs with point fittings is presented. The extended load model considers beyond the coupling of the two panes via the encapsulated gas, the abolition of the pinned edges’ frame condition, which is replaced by (a) the coupling of the free edges via the edge bond and (b) the insertion of the point fittings. [less ▲]

Detailed reference viewed: 17 (4 UL)
Peer Reviewed
See detailExtended mutation analysis and association studies of Nurr1 (NR4A2) in Parkinson disease.
Hering, R.; Petrovic, S.; Mietz, E.-M. et al

in Neurology (2004), 62(7), 1231-2

Detailed reference viewed: 105 (0 UL)
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See detailExtended Producer Responsibility in the Construction Sector through Blockchain, BIM and Smart Contract Technologies
Akbarieh, Arghavan UL; Carbone, William; Schäfer, Markus UL et al

Poster (2020, December 09)

Despite the enormous amount of raw or secondary materials flowing within the construction industry, the actual available volume of materials and their respective End-of-Lifecycle (EoL) treatment is not ... [more ▼]

Despite the enormous amount of raw or secondary materials flowing within the construction industry, the actual available volume of materials and their respective End-of-Lifecycle (EoL) treatment is not regulated nor uniform. On top of that, the EoL responsibility of different stakeholders after the future building deconstruction is confusing and disputable. Consequently, different sustainability policies and metrics suffer from inaccurately reported volumes of circulating materials in the economy. Hence, this article aims to find a new way to improve and regulate the EoL treatment of recyclable materials and to create value for them. The ultimate goal of the proposed framework is to make original manufacturers responsible for the EoL treatment of their recyclable construction materials and products under the Extended Producers Responsibility (EPR) policy that is enacted in the European Union for sustainable management of waste streams. Adhering to the EPR is difficult for buildings as they are long-term and complex assets. A high degree of transparency, accuracy and security is required to correctly track the lifecycle information of building parts and their respective manufacturers for the EPR implementation. For this purpose, a framework is conceptualised based on the immutability and transparency of blockchain technology to remove trust and trace barriers in the current supply chain. The proposed conceptual model results from the synergy of Building Information Modelling (BIM) technology, material and component banks, blockchain technology and smart contracts for the EoL treatment of recyclable materials. As a result, a data-driven and closed-loop material cycle will be accomplished. This paper demonstrates that through self-executing smart contracts, a clear line of responsibility and ownership could be defined while manufacturers could be made accountable in the post-consumer phase of their construction products. [less ▲]

Detailed reference viewed: 175 (11 UL)
See detailExtended Quantum Model For Porous Silicon Formation
Münder, H.; Frohnhoff, St; Berger, M. G. et al

in Mat. Res. Soc. Symp. Proc. Vol. 358 (1995)

Detailed reference viewed: 47 (0 UL)
Peer Reviewed
See detailAn Extended Quantum Model for Porous Silicon Formation
Frohnhoff, St; Marso, Michel UL; Berger, M. G. et al

in Journal of the Electrochemical Society (1995), 142(1995), 615-620

Detailed reference viewed: 74 (0 UL)
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Peer Reviewed
See detailAn Extended Solow Growth Model with Emigration: Transitional Dynamics and Skills Complementarity
Pieretti, Patrice UL; Zou, Benteng UL

in Economics Bulletin (2007), 6(35), 1-11

In this paper we develop an extended Solow growth model with skilled labor emigration which aggregates different labor types from strict complementarity to perfect substitution. Except in two particular ... [more ▼]

In this paper we develop an extended Solow growth model with skilled labor emigration which aggregates different labor types from strict complementarity to perfect substitution. Except in two particular cases, balanced growth paths can only be attained asymptotically. We therefore derive an analytical characterization of the transitional dynamics of the model. We are thus able to study the impact of labor elasticity of substitution on the time pattern of per capita income in the country that experiences brain drain. Simulations show that the shape of per capita trajectory depends crucially on the degree of complementarity (substitutability) between labor skills. Given that no income trajectory dominates the others, there is room for policy issues by influencing the elasticity of substitution (Klump and Preissler, 2000). [less ▲]

Detailed reference viewed: 68 (3 UL)
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See detailExtended space-time finite elements for landslide dynamics
Pasenow, F.; Zilian, Andreas UL; Dinkler, D.

in International Journal for Numerical Methods in Engineering (2013), 93(3), 329-354

The paper introduces a methodology for numerical simulation of landslides experiencing considerable deformations and topological changes. Within an interface capturing approach, all interfaces are ... [more ▼]

The paper introduces a methodology for numerical simulation of landslides experiencing considerable deformations and topological changes. Within an interface capturing approach, all interfaces are implicitly described by specifically defined level-set functions allowing arbitrarily evolving complex topologies. The transient interface evolution is obtained by solving the level-set equation driven by the physical velocity field for all three level-set functions in a block Jacobi approach. The three boundary-coupled fluid-like continua involved are modeled as incompressible, governed by a generalized non-Newtonian material law taking into account capillary pressure at moving fluid-fluid interfaces. The weighted residual formulation of the level-set equations and the fluid equations is discretized with finite elements in space and time using velocity and pressure as unknown variables. Non-smooth solution characteristics are represented by enriched approximations to fluid velocity (weak discontinuity) and fluid pressure (strong discontinuity). Special attention is given to the construction of enriched approximations for elements containing evolving triple junctions. Numerical examples of three-fluid tank sloshing and air-water-liquefied soil landslides demonstrate the potential and applicability of the method in geotechnical investigations. © 2012 John Wiley & Sons, Ltd. [less ▲]

Detailed reference viewed: 161 (2 UL)
Peer Reviewed
See detailExtended Survivable Passive Access Network (e-SPAN)
Wasim, Muhammad Umer UL; Zaidi, Syed Muhammad Hassan; Raja, Yasin et al

in Symposium on High Capacity Optical Networks and Enabling Technologies (HONET), September 6-8, Charlotte (NC) USA. (2006)

Wavelength Division Multiplexed based Passive Optical Networks (WDM-PON) are subjected to wide variety of incidental failures. It is preferred in WDM-PONs to provide fault management (survivability) at ... [more ▼]

Wavelength Division Multiplexed based Passive Optical Networks (WDM-PON) are subjected to wide variety of incidental failures. It is preferred in WDM-PONs to provide fault management (survivability) at link layer level. In this paper, our objective is to determine the factors, which can increase the scope of survivability at link layer, not available currently. We propose a cost-effective recovery mechanism, called ldquoExtended Survivable Passive Access Networkrdquo (e-SPAN). e SPAN is a multi-level protection scheme that has potential to corrects eventual errors that are caused by the transmission system by using different forward error correcting codes at receiver end, thus allowing us to have better performance budget in terms of BER and extended transmission distance of 8 to 12 Km. [less ▲]

Detailed reference viewed: 128 (4 UL)
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See detailAn Extended Systematic Literature Review on Provision of Evidence for Safety Certification
Nair, Sunil; de la Vara, Jose Luis; Sabetzadeh, Mehrdad UL et al

in Information and Software Technology (2014), 56(7), 689717

Detailed reference viewed: 254 (20 UL)
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See detailExtended telecommuting due to COVID-19 and the impact on working life
Sischka, Philipp UL; Steffgen, Georges UL

in Mein, Georg; Pause, Johannes (Eds.) Self and Society in the Corona Crisis. Perspectives from the Humanities and Social Sciences (2021)

The corona virus (COVID-19) pandemic has changed the working lives of people all over the world, amongst others, the labor market has seen a sharp increase in telecommuting. Therefore, the extent of ... [more ▼]

The corona virus (COVID-19) pandemic has changed the working lives of people all over the world, amongst others, the labor market has seen a sharp increase in telecommuting. Therefore, the extent of telecommuting in Luxembourg as well as definitions and different arrangements of telecommuting will be presented. Thereafter the chapter looks at merits and demerits of telecommuting and the boundary conditions of successfully working from home by focusing on the extraordinary situation under which telework currently takes place. In this regard, the effects of telecommuting on the individual, the organization and the society are outlined and discussed. Finally, the chapter closes highlighting requirements for effective telecommuting and describing ongoing research about the effects of telecommuting on different working conditions in Luxembourg. [less ▲]

Detailed reference viewed: 517 (0 UL)
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See detaileXtended Variational Quasicontinuum Methodology for Modelling of Crack Propagation in Discrete Lattice Systems
Rokos, Ondrej; Peerlings, Ron; Zeman, Jan et al

Scientific Conference (2017, July 17)

Detailed reference viewed: 46 (0 UL)
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Peer Reviewed
See detailExtending a key-chain based certified email protocol with transparent TTP
Liu, Z.; Pang, Jun UL; Zhang, C.

in Proc. 6th IEEE/IFIP Symposium on Trusted Computing and Communications (2010)

Detailed reference viewed: 112 (0 UL)
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See detailExtending functions to natural extensions
Teheux, Bruno UL; Hansoul, Georges

E-print/Working paper (2013)

Detailed reference viewed: 58 (1 UL)
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Peer Reviewed
See detailExtending maps to profinite completions in finitely generated quasivarieties
Teheux, Bruno UL; Hansoul, Georges

in Beiträge zur Algebra und Geometrie (2020), 61(4), 627-647

We consider the problem of extending maps from algebras to their profinite completions in finitely generated quasivarieties. Our developments are based on the construction of the profinite completion of ... [more ▼]

We consider the problem of extending maps from algebras to their profinite completions in finitely generated quasivarieties. Our developments are based on the construction of the profinite completion of an algebra as its natural extension. We provide an extension which is a multi-map and we study its continuity properties, and the conditions under which it is a map. [less ▲]

Detailed reference viewed: 90 (7 UL)
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See detailExtending pathways and processes using molecular interaction networks to analyse cancer genome data
Glaab, Enrico UL; Baudot, Anais; Krasnogor, Natalio et al

in BMC Bioinformatics (2010), 11(1), 597-597

Detailed reference viewed: 104 (2 UL)
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See detailExtending the assessment of Complex Problem Solving to finite state automata. Embracing heterogeneity
Neubert, Jonas UL; Kretzschmar, André UL; Wüstenberg, Sascha UL et al

in European Journal of Psychological Assessment (2015), 31

Detailed reference viewed: 72 (2 UL)