On the Electromagnetic Properties of Matter in Collapse Models

We discuss the electromagnetic properties of both a charged free particle, and a charged particle bounded by an harmonic potential, within collapse models. By choosing a particularly simple, yet physically relevant, collapse model, and under only the dipole approximation, we are able to solve the equation of motion exactly. In this way, both the finite time and large time behavior can be analyzed accurately. We discovered new features, which did not appear in previous works on the same subject. Since, so far, the spontaneous photon emission process places the strongest upper bounds on the collapse parameters, our results call for a further analysis of this process for those atomic systems which can be employed in experimental tests of collapse models, as well as of quantum mechanics.Comment: 17 pages, LaTeX, updated version with minor change

Dynamical Reduction Models: present status and future developments

We review the major achievements of the dynamical reduction program, showing why and how it provides a unified, consistent description of physical phenomena, from the microscopic quantum domain to the macroscopic classical one. We discuss the difficulties in generalizing the existing models in order to comprise also relativistic quantum field theories. We point out possible future lines of research, ranging from mathematical physics to phenomenology.Comment: 12 pages. Contribution to the Proceedings of the "Third International Workshop DICE2006", Castello di Piombino (Tuscany), September 11-15, 2006. Minor changes mad

The quantum theory of measurement within dynamical reduction models

We analyze in mathematical detail, within the framework of the QMUPL model of spontaneous wave function collapse, the von Neumann measurement scheme for the measurement of a 1/2 spin particle. We prove that, according to the equation of the model: i) throughout the whole measurement process, the pointer of the measuring device is always perfectly well localized in space; ii) the probabilities for the possible outcomes are distributed in agreement with the Born probability rule; iii) at the end of the measurement the state of the microscopic system has collapsed to the eigenstate corresponding to the measured eigenvalue. This analysis shows rigorously how dynamical reduction models provide a consistent solution to the measurement problem of quantum mechanics.Comment: 24 pages, RevTeX. Minor changes mad

The use of circular economy practices in SMEs across the EU

This study explores the circular economy (CE) practices of Small and Medium Enterprises (SMEs) in the 28 European Union (EU) member states. Five measures of CE are studied, namely Re-planning the way water is used to minimize usage and maximize re-usage, Using renewable energy, Re-planning energy usage to minimize consumption, Minimizing waste by recycling or reusing waste or selling it to another firm, and Redesigning products and services to minimize the use of materials or using recycled materials. Multilevel ordinal probit models that control within- and between-variability across European Union countries are estimated. Results show that CE measures across EU countries are very heterogeneous. At the firm level, we find that firm size (number of employees and total turnover in 2015) and percentage of firms’ turnover invested in R&D in 2015 are significant in explaining within-country variations. The multilevel structure (between-country variability) accounts for 6.1%–15.1% of the total variability of CE measures. These results have implications for the design of framework policies at EU level given that the firms surveyed are SMEs, the segment in which these CE measures most need improved planning and implementation.info:eu-repo/semantics/acceptedVersio

Pellicle Ultrastructure of Some Euglena Species

SUMMARYThe pellicle of five species of Euglena, belonging to three different groups (Catilliferae, Radiatae and Serpentes), was studied by transmission electron microscopy, in order to see if pellicular morphology could be taken as a valuable character to differentiate the groups. The data demonstrate that pellicular ultrastructure is not constant within the groups, and can therefore be considered a differential character only at the level of species

Generalized cross-covariances and their estimation

Generalized cross-covariances describe the linear relationships between spatial variables observed at different locations. They are invariant under translation of the locations for any intrinsic processes, they determine the cokriging predictors without additional assumptions and they are unique up to linear functions. If the model is stationary, that is if the variograms are bounded, they correspond to the stationary cross-covariances. Under some symmetry condition they are equal to minus the usual cross-variogram. We present a method to estimate these generalized cross-covariances from data observed at arbitrary sampling locations. In particular we do not require that all variables are observed at the same points. For fitting a linear coregionalization model we combine this new method with a standard algorithm which ensures positive definite coregionalization matrices. We study the behavior of the method both by computing variances exactly and by simulating from various model

Market opportunities for social farms

Although social farming is seen as a successful and innovative sector, social farms face various challenges, among which the need to find additional income required to stay in business. However, assuming that social farm food is considered as having ethical attributes, the research aims at investigating to what extent consumers are conscious of some ethical concerns (problems related to social hardship, social equity, food quality etc.), and whether this will create market opportunities for social farm food. The study area is the province of Pordenone (Italy). The results indicate that conscious consumers could represent an effective market channel also for social farm food, a notable opportunity for farms to improve their socioeconomic performance

10/26/1990 - Marching Panthers Morgan Humphrey and Tina Kramer

“Misurare la soddisfazione” è la sfida di approfondite ricerche e l’obiettivo di molte strategie di marketing. L’assunto di base è che un consumatore soddisfatto tende a reiterare i suoi comportamenti d’acquisto, a parità di ogni altra condizione o vincolo. Tradizionalmente, la soddisfazione è stata misurata come l’esito di un raffronto positivo tra le attese sviluppate prima dell’acquisto e i risultati ottenuti con l’utilizzo del bene acquistato. Tuttavia, nelle società di oggi, con la prevalenza dei consumi simbolici su quelli materiali, la frammentazione delle richieste del mercato, la vicinanza in tempo reale alle comunità di clienti, il rapporto instaurato coi beni acquistati non è quasi mai solo razionale, ma assume i connotati di un’esperienza totalitaria, emotiva e coinvolgente. Questo lavoro parte dall’assunto che la soddisfazione derivi, piuttosto che dalla specifica performance del prodotto, dalla valutazione dell’intera esperienza di consumo, dal momento in cui il prodotto è scelto a quello in cui ci si disfa. Sulla base di un innovativo approccio, il Modello conoscenze-speranze, essa è vista come un incremento dello stock di benessere soggettivo, esito di un raffronto con quanto razionalmente atteso ed emotivamente sperato. In quest’ottica, la soddisfazione risulta connessa con gli aspetti delle esperienze legati alla curiosità, alla divergenza, alla capacità di comportarsi e relazionarsi e, al contempo, con gli aspetti più propriamente sensoriali, simbolici ed estetici del consumo, che fanno appello alle emozioni più profonde ed agli affetti delle persone. Il volume è articolato in quattro parti – a vantaggio di quanti, studiosi e operatori, desiderino misurare con validità scientifica e rigore la soddisfazione nei diversi ambiti di consumo. Nella prima, sono passati in rassegna i principali studi sulla soddisfazione, come base per una revisione critica del paradigma tradizionale realizzata con la proposizione del nuovo modello interpretativo. Nella seconda parte, è sviluppata la scala di soddisfazione derivante dalle esperienze di consumo, rispettivamente, in rapporto ai prodotti shopping, convenience, specialty e ai servizi. Nella terza parte, sono presentate delle applicazioni della scala in campo bancario, assicurativo e distributivo, oltre che in relazione ad un costrutto alternativo collegato, la customer delight, concludendo con una rassegna sistematica degli effetti comportamentali, positivi o negativi, e delle conseguenti strategie di marketing da parte delle imprese. La quarta parte, infine, fornisce una vasta appendice didattica contenente tutti i passaggi statistici, gli output e i comandi del software SPSS-PASW, per condurre le analisi contenute nel volume