University Cattaneo

Castellanza, Italy

University Cattaneo

Castellanza, Italy
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Nai Ruscone M.,University Cattaneo | Osmetti S.A.,Catholic University of the Sacred Heart
Advances in Intelligent Systems and Computing | Year: 2017

The aim of the work is to propose a new flexible way of modeling the dependence between the components of non-normal multivariate longitudinal-data by using the copula approach. The presence of longitudinal data is increasing in the scientific areas where several variables aremeasured over a sample of statistical units at different times, showing two types of dependence: between variables and across time. We propose to model jointly the dependence structure between the responses and the temporal structure of each processes by pair copula contruction (PCC). The use of the copula allows the relaxation of the assumption of multinormality that is typical of the usual model for multivariate longitudinal data. The use of PCC allows us to overcome the problem of the multivariate copulae used in the literature which suffer from rather inflexible structures in high dimension. The result is a newextremly flexible model for multivariate longitudinal data, which overcomes the problem of modeling simultaneous dependence between two ormore non-normal responses over time. The explanation of the methodology is accompanied by an example. © Springer International Publishing Switzerland 2017.

Colicchia C.,University Cattaneo | Dallari F.,University Cattaneo | Melacini M.,Polytechnic of Milan
Production Planning and Control | Year: 2010

Managing risk has emerged as an issue of critical importance for today's globalised supply chains. This article focuses on inbound supply risk in a global sourcing context, where increased distances between sources of supply and final markets add uncertainty to supply continuity through longer and more variable lead times. After an in-depth analysis of international supply process vulnerability, this article identifies a set of approaches for managing risk in order to enhance supply chain resilience. Then, a simulation-based framework for assessing the effectiveness of the proposed approaches was developed and applied on a real case. © 2010 Taylor & Francis.

Giordani A.,University of Milan | Mari L.,University Cattaneo
Measurement: Journal of the International Measurement Confederation | Year: 2012

An appropriate characterization of property types is an important topic for measurement science. On the basis of a set-theoretic model of evaluation and measurement processes, the paper introduces the operative concept of property evaluation type, and discusses how property types are related to, and in fact can be derived from, property evaluation types, by finally analyzing the consequences of these distinctions for the concepts of 'property' used in the International Vocabulary of Metrology - Basic and General Concepts and Associated Terms (VIM3). © 2011 Elsevier Ltd. All rights reserved.

Rebora G.,University Cattaneo | Turri M.,University of Milan
Research Policy | Year: 2013

In the UK the Research Assessment Exercise (RAE) is being replaced by the Research Excellence Framework (REF); similarly, in Italy the former Research Evaluation Exercise (VTR 2001-2003) has been revised and extended and a new cycle of assessment was activated in Autumn 2011 (VQR 2004-2010). The analysis of the development and the consequences of both British and Italian assessment exercises is carried out on the basis of three theoretical frameworks - new public management (NPM), neo-institutional sociology (NIS), and organisational control theory (OCT). This last framework is crucial because the control systems have an effective sense-making capacity and it also exposes a different awareness about control systems in the British and Italian experiences. © 2013 Elsevier B.V. All rights reserved.

Mari L.,University Cattaneo
Metrologia | Year: 2015

Since its first edition, published in 1984, the International Vocabulary of Metrology (VIM) has become a landmark for the language of measurement, and in its three editions it has evolved together with the evolution of measurement science and its applications. This paper discusses the fundamental features of the VIM as a concept system and proposes some highlights about the way in the VIM some basic and general concepts of measurement have changed their definitions in the last thirty years. © 2015 BIPM & IOP Publishing Ltd.

Manzini R.,University Cattaneo
2013 International Conference on Engineering, Technology and Innovation, ICE 2013 and IEEE International Technology Management Conference, ITMC 2013 | Year: 2013

Technology intelligence is becoming increasingly relevant in this economic crisis, as a managerial process that stimulates and supports radical innovation and the creation of new business. Technology scanning, i.e. learning about any technological development which could have an impact on the future (Mortara et al., 2008) is probably the most difficult type of technology intelligence process. At the moment, the literature on technology intelligence does not yet provide a model for technology scanning aimed at supporting radical innovation. The paper aims at filling this gap and proposes a theoretical model for technology scanning. The model is then applied and tested in an Italian company operating in the industrial machinery industry, in the context of radical innovation. The results of the application allows to discuss the applicability and generalization of the model, and give some suggestions for future research on the topic. © 2013 IEEE.

Mari L.,University Cattaneo | Giordani A.,Catholic University of the Sacred Heart
Metrologia | Year: 2012

The concept system around 'quantity' and 'quantity value' is fundamental for measurement science, but some very basic issues are still open on such concepts and their relation. This paper argues that quantity values are in fact individual quantities, and that a complementarity exists between measurands and quantity values. This proposal is grounded on the analysis of three basic 'equality' relations: (i) between quantities, (ii) between quantity values and (iii) between quantities and quantity values. A consistent characterization of such concepts is obtained, which is then generalized to 'property' and 'property value'. This analysis also throws some light on the elusive concept of magnitude. © 2012 BIPM & IOP Publishing Ltd.

Mari L.,University Cattaneo | Mencattini A.,University of Rome Tor Vergata
Journal of Physics: Conference Series | Year: 2013

The paper emphasizes the importance that fundamental concepts in measurement science are defined according to a structured strategy, which provides both a general, qualitative characterization and a specific, type-related, quantitative definition. As a significant case, the concept 'sensitivity' is discussed and a definition for it proposed. © Published under licence by IOP Publishing Ltd.

Mari L.,University Cattaneo
Measurement: Journal of the International Measurement Confederation | Year: 2013

Since in the scientific and technical literature multiple, sometimes incompatible, definitions of 'measurement' can be found, identifying a single conceptual framework is a significant target for measurement science, towards a generalized concept of measurement, in compliance with the notion of widely-defined measurement proposed by Ludwik Finkelstein. This paper introduces the subject with a structured review of some paradigmatic positions and then proposes to characterize measurement as an evaluation process able to produce objective and inter-subjective information on the measurand. A justification is given that this standpoint encompasses the evaluation of both physical and non-physical properties. © 2013 Elsevier Ltd.

Mari L.,University Cattaneo | Wilson M.,University of California at Berkeley
Measurement: Journal of the International Measurement Confederation | Year: 2014

In the interests of fostering an inter-disciplinary dialogue, increasing collaboration between "hard" and "soft" measurement scientists, and learning from one another, the paper develops an analytical discussion of common elements between metrology and psychometrics. A simple example of physical measurement is introduced according to the conceptualization and terminology of the International Vocabulary of Metrology (VIM), and then its structural analogy to a test using Guttman items is shown. On this ground the example is generalized so to include a probabilistic component, and this leads to the basic Rasch model. Some notes on the delicate issue of measurement validity conclude the paper, whose aim, in the long run, is a measurement-related shared concept system, and a terminology understandable in both physical and social sciences. © 2014 Elsevier Ltd. All rights reserved.

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