Search results for " SURVEY"
showing 10 items of 1260 documents
Trajectory tracking of underactuated underwater vehicles
2003
This paper deals with a control strategies for underactuated underwater vehicles whose target is the tracking of a space trajectory. A cascade control strategy is employed which brings to a control law consisting of: 1) a kinematic control law, derived from the vehicle kinematic model, which forces this model to track the reference trajectory; and 2) a dynamic control law which forces the system to track the reference signals given by the kinematic control law. Conditions for asymptotic tracking of the trajectory are given with reference to the standard dynamical model of the above vehicle. An observer of the marine current is also added in order to process the control law. Simulation tests…
ICMM-a maturity model for software inspections
2010
Software inspection is widely acknowledged as an important method in software engineering. However, there is a need to better understand how to implement and improve inspection practices. This paper introduces Inspection Capability Maturity Model (ICMM), which provides support for assessment and improvement of software inspection practices in a software organization. The model has been developed iteratively based on a comprehensive literature survey and experiences from eight case organizations. This paper includes a detailed description of the used followed research process, the structure of ICMM and the rationale for the defined criteria. Additionally, the role of this kind of model in in…
A strategic framework for firm networks in manufacturing industry: An empirical survey
2009
Firm networking is becoming more and more the most important competitive strength in nowadays competitive environment. Such an evidence is partially neglected by the classical strategic analysis of firms competitiveness which mainly looks at the firm strength and weakness not in relationship with its capacity to build competitive networks. For such a reason, in the last years, many theoretical approaches have stressed the importance of networks to gain competitive advantage. In this paper, the most significant theories on firm networking are reviewed and an innovative strategic framework that mainly underlies at firm networks organisation is proposed. Very briefly, it is argued that network…
Les pratiques pédagogiques des enseignants du secondaire: l'éclairage des comparaisons internationales
2017
International audience; L'objectif de cet article est de comparer, à l'appui des données de l'enquête internationale TALIS, les pratiques pédagogiques des enseignants du second degré de plusieurs systèmes éducatifs (France, Royaume-Uni, Corée du Sud et Finlande) et de proposer des modèles d'analyse de la structure de ces pratiques. Nous montrons qu'il existe une hétérogénéité des pratiques pédagogiques et que les différentes composantes des pratiques entretiennent entre elles des liens statistiquement forts, susceptibles de varier d'un système à l'autre.
What is socio-ecological research delivering? A literature survey across 25 international LTSER platforms
2018
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE [ADD1_IRSTEA]Systèmes aquatiques soumis à des pressions multiples; International audience; With an overarching goal of addressing global and regional sustainability challenges, Long Term Socio-Ecological Research Platforms (LTSER) aim to conduct place-based research, to collect and synthesize both environmental and socio-economic data, and to involve a broader stakeholder pool to set the research agenda. To date there have been few studies examining the output from LTSER platforms. In this study we enquire if the socio-ecological research from 25 self-selected LTSER platforms of the International Long-Term Ecological Research (ILTER) network has …
Modelling Inoculum Availability ofPlurivorosphaerella nawaein Persimmon Leaf Litter with Bayesian Beta Regression
2019
AbstractCircular leaf spot (CLS), caused byPlurivorosphaerella nawae, is a serious disease of persimmon (Diospyros kaki) inducing necrotic lesions on leaves, defoliation and fruit drop. Under Mediter-ranean conditions,P. nawaeforms pseudothecia in the leaf litter during winter and ascospores are released in spring infecting susceptible leaves. Persimmon growers are advised to apply fungicides for CLS control during the period of inoculum availability, which was defined based on ascospore counts under the microscope. A model of inoculum availability ofP. nawaewas developed and evaluated as an alternative to ascospore counts. Leaf litter samples were collected weekly in L’Alcúdia from 2010 to…
Questionnaires and simulations to assess daylighting in Italian university classrooms for IEQ and energy issues
2021
Abstract Results from the DAYKE-Italy project are presented. An investigation on daylighting in eight classrooms in five Italian universities was carried out through a combined approach: an ad-hoc survey administered to students to investigate how they perceive daylight in classroom, and numerical simulations (DIVA + ALFA) to calculate a set of objective metrics (daylight, circadian, and energy-related). A sample of 542 questionnaires was collected through two sessions and the subjective judgments were correlated to objective metrics. Results from descriptive and statistical analyses showed: (i) the correlation was significant for all daylight metrics: among them, average daylight factor an…
Two Half-Truths Make a Whole? On Bias in Self-Reports and Tracking Data
2019
The pervasive use of mobile information technologies brings new patterns of media usage, but also challenges to the measurement of media exposure. Researchers wishing to, for example, understand the nature of selective exposure on algorithmically driven platforms need to precisely attribute individuals’ exposure to specific content. Prior research has used tracking data to show that survey-based self-reports of media exposure are critically unreliable. So far, however, little effort has been invested into assessing the specific biases of tracking methods themselves. Using data from a multimethod study, we show that tracking data from mobile devices is linked to systematic distortions in sel…
A cross-country study of skills and unemployment flows
2021
AbstractUsing an international survey that directly assesses the cognitive skills of the adult population, I study the relation between skills and unemployment flows across 37 countries. Depending on the specifically assessed domain, I document that skills have an unconditional correlation with the log-risk-ratio of exiting to entering unemployment of 0.65–0.68 across the advanced and skill-abundant countries in the sample. The relation is remarkably robust and it is unlikely to be due to reverse causality. I do not find evidence that this positive relation extends to the seven relatively less advanced and less skill-abundant countries in the sample: Peru, Ecuador, Indonesia, Mexico, Chile,…
The practice of violence risk assessment in Spain
2015
Antecedentes. La valoración del riesgo de violencia es un requisito fundamental en la toma de decisiones profesionales que implican prevenir, intervenir o informar sobre la conducta de las personas. El uso de herramientas estructuradas de evaluación del riesgo de violencia ha mostrado mejoría en la precisión de las evaluaciones basadas exclusivamente en el juicio clínico o en la pericia de un experto en contextos psiquiátricos, penitenciarios y jurídicos.Objetivo. Este estudio presenta los resultados de la primera encuesta sobre las prácticas profesionales asociadas al uso de herramientas de evaluación del riesgo de violencia en España.Materiales y métodos. La información fue recogida media…