Search results for "Lua"
showing 10 items of 3286 documents
Technical and economical assessment of distributed electrochemical storages for load shifting applications: An Italian case study
2016
Time-of-use (TOU) energy cost management involves the use of energy storage systems (ESSs) by customers to reduce their electricity bills. The ESS is charged during off-peak time periods, when electricity energy prices are low, and discharged during times when on-peak energy prices are applied. This article addresses the question whether it is economically viable to install medium-scale distributed ESSs designed to lower the electricity cost for a customer-side application, assuming flexible electricity tariffs. The technical/economical evaluation is carried out referring to lithium-ion (Li-ion), sodium sulfur (NaS) and vanadium redox battery (VRB) technologies, performing a parametric anal…
Feasibility studies for water reuse projects: an economical approach
2006
Usually the methodologies used to analyse the feasibility of water reuse projects are focused on the internal costs. The aim of this paper is to show a methodology to assess the feasibility of a water reuse project taking into account not just the internal impact, but also the external impact (environmental and social, for example) and the opportunity cost derived from the project. Internal benefit is obtained from the difference between internal income and internal costs. Internal income is obtained by multiplying the selling price of reclaimed water and the volume obtained. Internal costs are made up of the sum of investment costs, operating costs, financial costs and taxes. While some of…
Assessing the in vitro optical quality of presbyopic solutions based on the axial modulation transfer function.
2016
Purpose To present a metric for assessing the in vitro optical quality of rotationally symmetrical optical elements based on volume calculation under the surface defined by the axial modulation transfer function (MTF). Setting University of Valencia, Valencia, Spain. Design Experimental study. Methods The metric volume under the axial MTF was used to assess the optical quality of 2 rotationally symmetrical multifocal intraocular lenses (IOLs) within various defocus intervals (0.50 diopter [D], 0.75 D, and 1.00 D) and at various spatial frequency intervals (7.5 cycles per degree [cpd], 15.0 cpd, and 30.0 cpd). Results The far focus of the bifocal IOL yielded higher volume values at all spati…
On the optimal design of multi-stage cascaded transistor amplifiers with noise, gain and mismatch constraints
2007
The problem of evaluating the optimal performances of cascaded, unbalanced, multi-stage transistor amplifiers is addressed. In particular, a theoretically rigorous approach is proposed for the determination of a family of Optimal Design Curves (ODC's) which express the best noise-gain tradeoff that can be achieved - at each frequency and device operating condition - when a simultaneous constraint on amplifier input VSWR is accounted for. Such curves can be used as a more meaningful starting point in practical amplifier design in place of the approximate calculations so far employed for target performance or optimization goals determination.
Investor Sentiment or Managerial Overconfidence: The Back Room of Acquisitions
2017
In this study, we investigate bidder performance (both in the short and the long term) in periods of high and low valuation market in response to announcements of acquisitions carried out by Spanish listed firms over the period 1991-2011. We provide evidence that bidder reaction to acquisitions, in both the short and the long term, is not consistent with the predictions of investor sentiment (optimism) after controlling for target type. However, our findings after controlling for bidder market-to-book ratio reveal under reaction in acquisitions of listed targets that is not independent of the market sentiment, since it is greater in hot periods. Finally, the results are not so consistent fo…
A Novel Multi-hop Broadcasting Method for VANETs Based on Autonomic Computing Paradigm
2014
One of the three best papers, Selected for the Annals of Telecommunications journal; International audience; Broadcasting is widely used in Vehicular Ad hoc Networks (VANETs) but it is hard to achieve efficiently since it depends on the network density, i.e. may cause network congestion if the protocols are not well designed. This paper introduces a novel Autonomic Dissemination Method (ADM) which delivers messages in accordance with given priority and density levels. The proposed approach is based on two steps: an offline optimization process and an online adaptation to the network characteristics. The aim is to make effective use of radio resources when there are many messages to send imu…
Évaluation scolaire et climat motivationnel : l'apport d'une analyse des interactions évaluatives orales à l'école élémentaire
2021
International audience
Intellectual Capital Measurement, Management, and Valuation
2021
At the present time one of the different methods of competitive advantages for businesses the—so-called soft values, i.e., intangible assets to face the new challenges. It is in this perspective that companies are changing their strategies and rethinking their organization, structures and processes in order to obtain a better detection and measurement of intangible assets.
Respondent Uncertainty and Ordering Effect on Willingness to Pay for Salt Marsh Conservation in the Brest Roadstead (France)
2017
International audience; This paper explores the potential link between the sensitivity of willingness to pay (WTP) to the order of presenting bid amounts in contingent valuation questions (ordering effect) and respondent uncertainty. The resource being valued is a public project to protect salt marshes against the spread of an invasive aquatic plant in the Brest roadstead (France). Valuation uncertainty is captured through a variant of payment card format where respondents are given the opportunity to report their WTP as either a single value (Option A) or an interval of values (Option B). The ordering effect is tested using both parametric models that ignore and control for the potential s…
le cas de l'université de Bourgogne
2017
International audience; Dans le cadre des réflexions sur le développement des centres de soutien à l'enseignement, cette communication s'intéresse aux relations administratives entre les équipes pédagogiques et un tel centre (le CIPE à l'université de Bourgogne) durant les évaluations obligatoires et systématiques d'EEE qui relèvent de ses missions. L'objectif est d'étudier les résultats de l'EEE au regard des relations administratives en intégrant des informations sur les équipes pédagogiques concernées et la nature du dispositif d'EEE choisi par elles. Plus précisément, cette étude est née d'une conception des personnels du CIPE selon laquelle lorsque des difficultés administratives exist…