Search results for " methodology."
showing 10 items of 520 documents
Report relativo all'indagine qualitativa effettuata nel territorio del Calatino Sud-Simeto
2019
Il capitolo è il prodotto di una ricerca quali-quantitativa che ha messo in luce, per quanto riguarda l’area del Calatino Sud-Simeto, un’economia disaggregata e riorganizzata solo in base a dipendenze esterne (economia marginale), del tutto simile a quella descritta da Bagnasco in Le tre Italie (1977). Allo scopo di favorire forme di cooperazione e reti inter-istituzionali di natura locale, la ricerca evidenzia le strategie di potenziamento delle capabilities (Sen 2000) della cittadinanza straniera residente nel Calatino Sud-Simeto attraverso lo sguardo degli stakeholder istituzionali e informali del territorio di riferimento. A fronte di condizioni cristallizzate (Boudon 1998; Elster 1989)…
Measuring Tourist Satisfaction Through a Dual Approach: The 4Q Methodology
2018
Tourist satisfaction is one of the key factors in determining the success of a tourist destination, since it affects behavioural intentions, such as the willingness to revisit and recommend the destination. Therefore, much research has addressed the measuring of tourist satisfaction, either eliciting positive or negative evaluations of a holiday or destination. The spread between expected positive and negative characteristics can trigger a tourist experience. And the gap between expectations and perceptions will produce a feeling of satisfaction or dissatisfaction (Expectancy-Disconfirmation Paradigm, EDP). Under these conditions, this paper adopts a dual approach, considering tourist satis…
sj-pdf-1-smr-10.1177_00491241221092725 - Supplemental material for Improving Estimates Accuracy of Voter Transitions. Two New Algorithms for Ecologic…
2022
Supplemental material, sj-pdf-1-smr-10.1177_00491241221092725 for Improving Estimates Accuracy of Voter Transitions. Two New Algorithms for Ecological Inference Based on Linear Programming by Jose M. Pavía and Rafael Romero in Sociological Methods & Research
sj-pdf-1-smr-10.1177_00491241221092725 - Supplemental material for Improving Estimates Accuracy of Voter Transitions. Two New Algorithms for Ecologic…
2022
Supplemental material, sj-pdf-1-smr-10.1177_00491241221092725 for Improving Estimates Accuracy of Voter Transitions. Two New Algorithms for Ecological Inference Based on Linear Programming by Jose M. Pavía and Rafael Romero in Sociological Methods & Research
An Expert System for the Design of Agents
2007
The growing interest for the design and development of multi-agent systems has brought to the creation of a specific research area called Agent-Oriented Software Engineering (AOSE), specifically conceived for the development of complex systems. The development of such systems needs the support of appropriate tools that could help the designer in producing the design artefacts. We developed a tool called Metameth that may be used to define a new (agent-oriented) design process as well as to apply it. In this paper, we describe only a slice of this complex tool, specifically addressing the interaction with human actors (the designers). This subsystem is conceived as a collaborative multi-agen…
Near Infrared Spectroscopy Detection and Quantification of Herbal Medicines Adulterated with Sibutramine.
2015
There is an increasing demand for herbal medicines in weight loss treatment. Some synthetic chemicals, such as sibutramine (SB), have been detected as adulterants in herbal formulations. In this study, two strategies using near infrared (NIR) spectroscopy have been developed to evaluate potential adulteration of herbal medicines with SB: a qualitative screening approach and a quantitative methodology based on multivariate calibration. Samples were composed by products commercialized as herbal medicines, as well as by laboratory adulterated samples. Spectra were obtained in the range of 14,000-4000 per cm. Using PLS-DA, a correct classification of 100% was achieved for the external validatio…
Pedagoģija: Izglītības zinātnes un pedagoģija mūsdienu pasaulē
2004
Rakstu krājums sastāv no 4 daļām: 1. Vispārējās pedagoģijas uzdevumi jaunajos sabiedriskajos apstākļos. 2. Mācību priekšmetu metodikas aktuālas problēmas. 3. Literatūrzinātne un valodniecība. 4.Translatoloģija.
Correcting for non-ignorable missingness in smoking trends
2015
Data missing not at random (MNAR) is a major challenge in survey sampling. We propose an approach based on registry data to deal with non-ignorable missingness in health examination surveys. The approach relies on follow-up data available from administrative registers several years after the survey. For illustration we use data on smoking prevalence in Finnish National FINRISK study conducted in 1972-1997. The data consist of measured survey information including missingness indicators, register-based background information and register-based time-to-disease survival data. The parameters of missingness mechanism are estimable with these data although the original survey data are MNAR. The u…
Model-Assisted Estimation Through Random Forests in Finite Population Sampling
2021
In surveys, the interest lies in estimating finite population parameters such as population totals and means. In most surveys, some auxiliary information is available at the estimation stage. This information may be incorporated in the estimation procedures to increase their precision. In this article, we use random forests (RFs) to estimate the functional relationship between the survey variable and the auxiliary variables. In recent years, RFs have become attractive as National Statistical Offices have now access to a variety of data sources, potentially exhibiting a large number of observations on a large number of variables. We establish the theoretical properties of model-assisted proc…
Horvitz-Thompson estimators for functional data: asymptotic confidence bands and optimal allocation for stratified sampling
2009
When dealing with very large datasets of functional data, survey sampling approaches are useful in order to obtain estimators of simple functional quantities, without being obliged to store all the data. We propose here a Horvitz--Thompson estimator of the mean trajectory. In the context of a superpopulation framework, we prove under mild regularity conditions that we obtain uniformly consistent estimators of the mean function and of its variance function. With additional assumptions on the sampling design we state a functional Central Limit Theorem and deduce asymptotic confidence bands. Stratified sampling is studied in detail, and we also obtain a functional version of the usual optimal …