855 research outputs found
Empowering end-users in the energy transition: An exploration of products and services to support changes in household energy management
No full textCurrent discourse on smart grid deployment expects residential end users to play a more active role as co-providers in the electric power system. Their electricity consumption and production is considered a resource for balancing supply and demand in an electric power system with distributed generation. This means that, in addition to using energy efficiently, they, for example, have to adjust their consumption patterns to the production patterns of locally available and intermittent energy generation. This thesis explores how the technological and social contexts of smart grids can shape the role of residential end-users as co-providers in the electric power system. The main objective was to formulate implications for the development of products and services that support end-users in taking up a co-provider role. The research involved a literature review about currently applied smart grid technologies and field studies of two pilot projects in which households were equipped with smart energy technology: Energy Battle and PowerMatching City. Both cases concern the implementation of a product-service combination that was new for the household and that was aimed at enabling one or more aspects of co-providing end-user behavior. End-users’ experiences in using the implemented system were central to the research in each case. The research resulted in design implications within four themes: (1) Design of the user interface, (2) Design in relation to the social context at household and community level, (3) Integral design approach to address behavioral and technical aspects of smart energy system performance, and (4) Design of products and services as part of an experiential learning process for both developers and end-users.Design Engineering / Design for SustainabilityIndustrial Design Engineerin
WITHDRAWN: Z+(4430) as a cusp in D∗(2010)D¯1(2420)
No full textThis article has been withdrawn consistent with Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). The Publisher apologizes for any inconvenience this may cause
A feature of BESIII data for J/Ψ→γ(η′ππ) and comments on η(1405) and η(1475)
No full textAbstractThe X(1835) has been confirmed clearly in new BESIII data for J/Ψ→γ(η′ππ); the angular distribution of the photon is consistent with a pseudoscalar. This makes it a candidate for an ss¯ radial excitation of η′ and η(1440) (or one or both of η(1405) and η(1475)). However, a conspicuous feature of the BESIII data is the absence of evidence for η(1440)→η′ππ while it is well known that η(1440) appears in ηππ. Can these facts be reconciled? There is in fact a simple explanation. The channel η(1440)→ηππ may be explained by the two-step process η(1440)→[K⁎K¯]L=1 and [κK¯]L=0, followed by KK¯→a0(980)→ηπ. This process does not produce any significant η′π signal because of the Adler zero close to the η′π threshold. Some further comments are added on necessary points in fitting data on η(1440)
Comments on the σ and κ
No full textAbstractEvidence for the σ pole has been reported in production processes such as D+→π+π−π+; likewise evidence for the κ pole appears in D+→K−π+π+. Their effects in ππ and Kπ elastic scattering are much less conspicuous. However, consistent fits to both production data and elastic scattering may be obtained by including the Adler zero into an s-dependent width for each resonance. These zeros suppress strongly the effects of the σ and κ poles in elastic scattering; the zeros are absent from amplitudes for production data. With this prescription, data from ππ→ππ, Ke4 decays and CP violation in K0 decays give a σ pole position of (525±40)−i(247±25) MeV. A combined analysis with production data gives a better determination of (533±25)−i(249±25) MeV. The analysis of LASS data for Kπ elastic scattering, including the Adler zero, determines a κ pole at (722±60)−i(386±50) MeV.The Fourier transform of the matrix element for σ→ππ reveals a compact interaction region with RMS radius ∼0.4 fm
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