396 research outputs found
Isospin dependence of the three-nucleon force
We classify --nucleon forces according to their isospin dependence and
discuss the most general isospin structure of the three--nucleon force. We
derive the leading and subleading isospin--breaking corrections to the
three--nucleon force using the framework of chiral effective field theory.Comment: 21 pages, 6 figure
Combining Knowledge- and Corpus-based Word-Sense-Disambiguation Methods
In this paper we concentrate on the resolution of the lexical ambiguity that
arises when a given word has several different meanings. This specific task is
commonly referred to as word sense disambiguation (WSD). The task of WSD
consists of assigning the correct sense to words using an electronic dictionary
as the source of word definitions. We present two WSD methods based on two main
methodological approaches in this research area: a knowledge-based method and a
corpus-based method. Our hypothesis is that word-sense disambiguation requires
several knowledge sources in order to solve the semantic ambiguity of the
words. These sources can be of different kinds--- for example, syntagmatic,
paradigmatic or statistical information. Our approach combines various sources
of knowledge, through combinations of the two WSD methods mentioned above.
Mainly, the paper concentrates on how to combine these methods and sources of
information in order to achieve good results in the disambiguation. Finally,
this paper presents a comprehensive study and experimental work on evaluation
of the methods and their combinations
Laboratory characterization of brick walls rendered with a pervious lime-cement mortar
A laboratory study investigating important thermal retrofitting solutions for simple and double (cavity) brick walls is presented. Test walls were modified using materials of current interest including an external pervious lime-cement mortar render and insulation board prior to evaluation. Laboratory simulations of steady-state winter and summer scenarios were performed using apparatus comprising two opposing climate chambers. Temperature, relative humidity and heat flux rate were monitored with surface sensors every 10 min until stabilization on each wall type, retrofitting solution and climate scenario. The temperature and relative humidity profiles, heat flux, surface temperature difference, thermal conductance, condensation risk and stabilization times were assessed. Comparisons between simple and double (cavity) brick walls showed significant differences and a high condensation risk in the non-ventilated air cavity of the double wall. The pervious lime-cement mortar render enhanced substantially the thermal performance of the single wall although increased the condensation risk of the double (cavity) wall. As expected, the insulation layer reduced the thermal conductance of the wall, although the improvement in a summer scenario was considerably lower than in winter. The different performance observed between winter and summer steady-state conditions emphasized the importance of the heat and mass transfer coupling effect. Therefore, this work proves that effective retrofitting depends on materials, wall layouts and climate conditions. These experimental results provide essential knowledge about assessing the effects of common retrofitting solutions especially under hot-dry summer scenarios.</p
An online platform to unify and synchronise heritage architecture information
[EN] Traditionally, in heritage architecture, each discipline works independently, generating dispersed data. Heritage Building Information Modelling (HBIM) can provide benefits in managing heritage projects. However, the modelling task is laborious, BIM software tends to be complex, and historical databases are not synchronised with HBIM models. The aim of this research is to create an online work platform where interdisciplinary stakeholders can synchronise heritage information. Design Science Research (DSR) was the methodological approach adopted, consisting of designing an artefact and evaluating it iteratively. As a result, an innovative in-cloud system named BlMlegacy that connects the intrinsic HBIM database with heritage documentary databases was designed. BlMlegacy was used to manage a complete heritage registration project in a case study. The results were validated through a focus group with external professionals. The theoretical definition of the BlMlegacy platform structure is a contribution to knowledge as it could be used as a basis to develop new systems. BlMlegacy allows non-technical heritage stakeholders to collaborate effectively, which is a notable practical contribution.The authors would like to acknowledge the members of the research
project entitled: The Design of a Database, Management Model for the
Information and Knowledge of Architectural Heritage; HAR2013-41614-R;
and the members of the UPV and the University of Huddersfield that
have collaborated within the research.Jordán Palomar, I.; G-Valldecabres, J.; Tzortzopoulos, P.; Pellicer, E. (2020). An online platform to unify and synchronise heritage architecture information. Automation in Construction. 110:1-17. https://doi.org/10.1016/j.autcon.2019.103008S117110Migilinskas, D., Popov, V., Juocevicius, V., & Ustinovichius, L. (2013). The Benefits, Obstacles and Problems of Practical Bim Implementation. Procedia Engineering, 57, 767-774. doi:10.1016/j.proeng.2013.04.097Teo, M. M. M., & Loosemore, M. (2001). A theory of waste behaviour in the construction industry. Construction Management and Economics, 19(7), 741-751. doi:10.1080/01446190110067037Kempton, J. (2006). Can lean thinking apply to the repair and refurbishment of properties in the registered social landlord sector? Structural Survey, 24(3), 201-211. doi:10.1108/02630800610678850Murphy, M., McGovern, E., & Pavia, S. (2009). Historic building information modelling (HBIM). Structural Survey, 27(4), 311-327. doi:10.1108/02630800910985108Volk, R., Stengel, J., & Schultmann, F. (2014). Building Information Modeling (BIM) for existing buildings — Literature review and future needs. Automation in Construction, 38, 109-127. doi:10.1016/j.autcon.2013.10.023Quattrini, R., Malinverni, E. S., Clini, P., Nespeca, R., & Orlietti, E. (2015). FROM TLS TO HBIM. HIGH QUALITY SEMANTICALLY-AWARE 3D MODELING OF COMPLEX ARCHITECTURE. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XL-5/W4, 367-374. doi:10.5194/isprsarchives-xl-5-w4-367-2015Oreni, D., Brumana, R., Della Torre, S., Banfi, F., Barazzetti, L., & Previtali, M. (2014). Survey turned into HBIM: the restoration and the work involved concerning the Basilica di Collemaggio after the earthquake (L’Aquila). ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, II-5, 267-273. doi:10.5194/isprsannals-ii-5-267-2014Barazzetti, L., Banfi, F., Brumana, R., Gusmeroli, G., Previtali, M., & Schiantarelli, G. (2015). Cloud-to-BIM-to-FEM: Structural simulation with accurate historic BIM from laser scans. Simulation Modelling Practice and Theory, 57, 71-87. doi:10.1016/j.simpat.2015.06.004Green, A., & Dixon, J. (2016). Standing buildings and built heritage. Post-Medieval Archaeology, 50(1), 121-133. doi:10.1080/00794236.2016.1169492Ilter, D., & Ergen, E. (2015). BIM for building refurbishment and maintenance: current status and research directions. Structural Survey, 33(3), 228-256. doi:10.1108/ss-02-2015-0008Megahed, N. (2015). Towards a Theoretical Framework for HBIM Approach in Historic Preservation and Management. International Journal of Architectural Research: ArchNet-IJAR, 9(3), 130. doi:10.26687/archnet-ijar.v9i3.737Perng, Y.-H., Hsia, Y.-P., & Lu, H.-J. (2007). A Service Quality Improvement Dynamic Decision Support System for Refurbishment Contractors. Total Quality Management & Business Excellence, 18(7), 731-749. doi:10.1080/14783360701349716Du, J., Zou, Z., Shi, Y., & Zhao, D. (2018). Zero latency: Real-time synchronization of BIM data in virtual reality for collaborative decision-making. Automation in Construction, 85, 51-64. doi:10.1016/j.autcon.2017.10.009Li, C. Z., Xue, F., Li, X., Hong, J., & Shen, G. Q. (2018). An Internet of Things-enabled BIM platform for on-site assembly services in prefabricated construction. Automation in Construction, 89, 146-161. doi:10.1016/j.autcon.2018.01.001Grilo, A., & Jardim-Goncalves, R. (2010). Value proposition on interoperability of BIM and collaborative working environments. Automation in Construction, 19(5), 522-530. doi:10.1016/j.autcon.2009.11.003Grover, R., & Froese, T. M. (2016). Knowledge Management in Construction Using a SocioBIM Platform: A Case Study of AYO Smart Home Project. Procedia Engineering, 145, 1283-1290. doi:10.1016/j.proeng.2016.04.165Howell, S., Rezgui, Y., & Beach, T. (2017). Integrating building and urban semantics to empower smart water solutions. Automation in Construction, 81, 434-448. doi:10.1016/j.autcon.2017.02.004Jeong, W., Chang, S., Son, J., & Yi, J.-S. (2016). BIM-Integrated Construction Operation Simulation for Just-In-Time Production Management. Sustainability, 8(11), 1106. doi:10.3390/su8111106Lee, J., Park, Y.-J., Choi, C.-H., & Han, C.-H. (2017). BIM-assisted labor productivity measurement method for structural formwork. Automation in Construction, 84, 121-132. doi:10.1016/j.autcon.2017.08.009Holmström, J., Ketokivi, M., & Hameri, A.-P. (2009). Bridging Practice and Theory: A Design Science Approach. Decision Sciences, 40(1), 65-87. doi:10.1111/j.1540-5915.2008.00221.xPeffers, K., Tuunanen, T., Rothenberger, M. A., & Chatterjee, S. (2007). A Design Science Research Methodology for Information Systems Research. Journal of Management Information Systems, 24(3), 45-77. doi:10.2753/mis0742-1222240302Inyim, P., Rivera, J., & Zhu, Y. (2015). Integration of Building Information Modeling and Economic and Environmental Impact Analysis to Support Sustainable Building Design. Journal of Management in Engineering, 31(1). doi:10.1061/(asce)me.1943-5479.0000308Zhao, D., McCoy, A. P., Bulbul, T., Fiori, C., & Nikkhoo, P. (2015). Building Collaborative Construction Skills through BIM-integrated Learning Environment. International Journal of Construction Education and Research, 11(2), 97-120. doi:10.1080/15578771.2014.986251Gurevich, U., Sacks, R., & Shrestha, P. (2017). BIM adoption by public facility agencies: impacts on occupant value. Building Research & Information, 45(6), 610-630. doi:10.1080/09613218.2017.1289029Dainty, A., Leiringer, R., Fernie, S., & Harty, C. (2017). BIM and the small construction firm: a critical perspective. Building Research & Information, 45(6), 696-709. doi:10.1080/09613218.2017.129394
Protocol to manage heritage-building interventions using Heritage Building Information Modelling (HBIM)
[EN] The workflow in historic architecture projects presents problems related to the lack of clarity of processes, dispersion of information and the use of outdated tools. Different heritage organisations have showed interest in innovative methods to resolve those problems and improve cultural tourism for sustainable economic development. Building Information Modelling (BIM) has emerged as a suitable computerised system for improving heritage management. Its application to historic buildings is named Historic BIM (HBIM). HBIM literature highlights the need for further research in terms of the overall processes of heritage projects, its practical implementation and a need for better cultural documentation. This work uses Design Science Research to develop a protocol to improve the workflow in heritage interdisciplinary projects. Research techniques used include documentary analysis, semi-structured interviews and focus groups. HBIM is proposed as a virtual model that will hold heritage data and will articulate processes. As a result, a simple and visual HBIM protocol was developed and applied in a real case study. The protocol was named BIMlegacy and it is divided into eight phases: building registration, determine intervention options, develop design for intervention, planning the physical intervention, physical intervention, handover, maintenance and culture dissemination. It contemplates all the stakeholders involved.We would like to acknowledge the Spanish Ministry of Economy and Competitiveness for the support received to develop the project entitled: Design of a Database, Management Model for the Information and Knowledge of Architectural Heritage (HAR2013-41614-R), in kind support from the stakeholders involved. We would also like to thank the University of Huddersfield and the Universidad Politecnica de Valencia for their support of this research.Jordán-Palomar, I.; Tzortzopoulos, P.; G-Valldecabres, J.; Pellicer Armiñana, E. (2018). Protocol to manage heritage-building interventions using Heritage Building Information Modelling (HBIM). Sustainability. 10(4):1-19. https://doi.org/10.3390/su10030908S11910
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Automatic rule generation based on genetic programming for event correlation
The widespread adoption of autonomous intrusion detection technology is overwhelming current frameworks for network security management. Modern intrusion detection systems (IDSs) and intelligent agents are the most mentioned in literature and news, although other risks such as broad attacks (e.g. very widely spread in a distributed fashion like botnets), and their consequences on incident response management cannot be overlooked. Event correlation becomes then essential. Basically, security event correlation pulls together detection, prevention and reaction tasks by means of consolidating huge amounts of event data. Providing adaptation to unknown distributed attacks is a major requirement as well as their automatic identification. This positioning paper poses an optimization challenge in the design of such correlation engine and a number of directions for research. We present a novel approach for automatic generation of security event correlation rules based on Genetic Programming which has been already used at sensor level
Transmit Power Minimization for MIMO Systems of Exponential Average BER with Fixed Outage Probability
This document is the Accepted Manuscript version of the following article: Dian-Wu Yue, and Yichuang Sun, ‘Transmit Power Minimization for MIMO Systems of Exponential Average BER with Fixed Outage Probability’, Wireless Personal Communications, Vol. 90 (4): 1951-1970, first available online on 20 June 2016. Under embargo. Embargo end date: 20 June 2017. The final publication is available at Springer via https://link.springer.com/article/10.1007%2Fs11277-016-3432-4This paper is concerned with a wireless multiple-antenna system operating in multiple-input multiple-output (MIMO) fading channels with channel state information being known at both transmitter and receiver. By spatiotemporal subchannel selection and power control, it aims to minimize the average transmit power (ATP) of the MIMO system while achieving an exponential type of average bit error rate (BER) for each data stream. Under the constraints on each subchannel that individual outage probability and average BER are given, based on a traditional upper bound and a dynamic upper bound of Q function, two closed-form ATP expressions are derived, respectively, which can result in two different power allocation schemes. Numerical results are provided to validate the theoretical analysis, and show that the power allocation scheme with the dynamic upper bound can achieve more power savings than the one with the traditional upper bound.Peer reviewe
Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property Methods
“This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial & Engineering Chemistry Research copyright © American Chemical Society after peer review and technical editing by the publisher . To access the final and published work see Enterprise Ionic Liquids Database (ILUAM) for Use in Aspen ONE Programs Suite with COSMO-Based Property
Methods V. R. Ferro, C. Moya, D. Moreno, R. Santiago, J. de Riva, G. Pedrosa, M. Larriba, I. Diaz, and J. Palomar
Industrial & Engineering Chemistry Research 2018 57 (3), 980-989
DOI: 10.1021/acs.iecr.7b04031An enterprise database of pure ionic liquids (ILs) for its use in the Aspen ONE programs is presented. The database is identified as ILUAM, and the first version (ILUAM01) contains 100 ILs composed of 30 cations and 23 anions. The IL components were introduced in Aspen Properties as pseudocomponents using information from the computational COSMO-RS method and from experimental viscosity data. ILUAM database was created to be used along with the COSMOSAC property model implemented in Aspen Plus, allowing evaluating IL process performance without needing further experimental data. Some validation tests were carried out to demonstrate the successful incorporation of ILs in the Aspen Plus property system. Then, the performance of ILUAM01 database in thermodynamic property predictions of mixtures involving ILs and conventional chemical compounds was revised in terms of activity coefficients at infinite dilution and phase equilibrium data. The property description of pure ILs and IL mixtures with conventional chemical compounds using COSMO-based/Aspen Plus approach was found with the accuracy level required in the conceptual design of new processes. ILUAM database offers the opportunity of performing systematic evaluation of potential industrial applications of ILs and their competitiveness as alternative to conventional solvents.The authors are grateful to the Comunidad de Madrid (project S2013-
MAE-2800) and to the Ministerio de Economía y Competitividad of Spain (Project CTQ2014-52288-R) for financial support. M. Larriba also thanks Ministerio de Economía y Competitividad of Spain for awarding him a Juan de la Cierva-Formación Contract (Reference FJCI-2015-25343
Final State Interactions in Hadronic D decays
We show that the large corrections due to final state interactions (FSI) in
the D^+\to \pi^-\pi^+\pi^+, D^+_s\to \pi^-\pi^+\pi^+, and D^+\to K^-\pi^+\pi^+
decays can be accounted for by invoking scattering amplitudes in agreement with
those derived from phase shifts studies. In this way, broad/overlapping
resonances in S-waves are properly treated and the phase motions of the
transition amplitudes are driven by the corresponding scattering matrix
elements determined in many other experiments. This is an important step
forward in resolving the puzzle of the FSI in these decays. We also discuss why
the \sigma and \kappa resonances, hardly visible in scattering experiments, are
much more prominent and clearly visible in these decays without destroying the
agreement with the experimental \pi\pi and K\pi low energy S-wave phase shifts.Comment: 22 pages, 6 figures, 5 tables. Minor changes. We extend the discusion
when quoting a reference and we include a new one. Some typos are fixe
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