Search results for "NDT"
showing 10 items of 604 documents
A model to analyse algebraic tasks solved by students : a comparative study from Finland and Norway
2013
Masteroppgave i matematikkdidaktikk- Universitetet i Agder Participating in the international VIDEOMAT-project, which is accomplished by four universities from Finland, Norway, Sweden and California (USA), this master thesis has beenbased on a comparative study about the introduction of algebrain Finland and Norway. The focus of the present study has beento compare the way studentssolve algebraic tasks: theprocedures which they use while solving tasks and the mistakes they produce. Similarities and/or differences have beenidentified between those two countries. The empirical material for thisresearch has already been collected and it includes videotaped lessons, lesson graphsand students’ w…
Improving students’ mathematics self-efficacy: A systematic review of intervention studies
2022
Self-efficacy is an integral part of personal factors that contributes substantially to students' success in mathematics. This review draws on previous intervention studies to identify, describe, and expose underlying mechanisms of interventions that foster mathematics self-efficacy. The findings show that effective mathematics self-efficacy interventions can be categorized into three categories using their underlying mechanisms: those that directly manipulate sources of self-efficacy to foster the construct, and those that either embed self-efficacy features in teaching methods or in learning strategies. Specific examples of interventions that fall in each of these three categories are des…
Load mitigation method for wind turbines during emergency shutdowns
2021
Wind turbines experience countless shutdowns during their lifetimes. A shutdown is a transient process characterised by a pitch-to-feather manoeuvre of three blades. Such a pitch manoeuvre is often collective, open-loop, and can substantially slow the rotor speed within several seconds. However, undesirable structural responses may arise because of the imbalanced aerodynamic loads acting on the rotor. To address this issue, this paper proposes a method that actively adjusts the individual pitch rate of each blade during an emergency shutdown. This method is founded on a minimal intervention principle and uses the blade-root bending moment measurements as the only inputs. The control objecti…
Elaboración un instrumento para conocer las características de la banda sonora de la programación infantil de televisión
2014
Television is one of the most important elements in the construction of the musical and audible reality of children and teenagers. It offers a selected and edited version of a musical environment, with an indisputable level of communicative and patrimonial influence. This paper is part of a research project that sets out to know what children are listening to in children’s television programming, in a sample of Latin American television coverage. The general objective has been to establish the parameters of everyday listening experiences and to create an instrument which is able to determine the objective elements of listening environments through their most notable medium: the soundtrack o…
Redibujar la educación artística o rediseñar el papel educativo del dibujo.
2017
Ana Mae Barbosa, figura clave del panorama internacional de la educación en artes, fue presidenta de InSEA y mantiene una lucha constante por unificar esfuerzos promoviendo las artes en las políticas educativas. Su último libro se organiza mediante etapas históricas, ubicando personajes brasileños de inicios del siglo XX (Theodoro Braga, Cecília Meireles, Edgar Sussekind de Mendonça) imbricados con autores anglosajones (John Dewey, Viktor Lowenfeld, Marion Richardson, Herbert Read). A pesar del supuesto engranaje historicista, sus reflexiones nos acercan constantemente la actualidad. Consigue emocionar, y se ha equilibrado un ejercicio de memoria histórica con la necesaria reflexión crítica…
Well-posedness of Prandtl equations with non-compatible data
2013
In this paper we shall be concerned with Prandtl's equations with incompatible data, i.e. with initial data that, in general, do not fulfil the boundary conditions imposed on the solution. Under the hypothesis of analyticity in the streamwise variable, we shall prove that Prandtl's equations, on the half-plane or on the half-space, are well posed for a short time.
A comparative study on the dynamic response of three semisubmersible floating offshore wind turbines
2019
Abstract Currently, there is a great interest to globally develop offshore wind energy due to the greenhouse effect and energy crisis. Great efforts have been devoted to develop reliable floating offshore wind energy technology to exploit the wind energy resources in deep seas. This paper presents a comparative study of the dynamic response of three different semisubmersible floating wind turbine structures. All the three platforms support the same 5MW wind turbine. The platforms examined are: a V-shaped Semi, an OC4-DeepCwind Semi and a Braceless Semi at 200 m water depth. A dynamic analysis is carried out in order to calculate and compare the performance of these platforms. The comparison…
Sublime, corsetti, e ragtime. Woody Allen e Gustav Mahler
2022
L'articolo esamina la relazione tra la musica di Mahler e il cinema nel caso di Woody Allen. Come è noto, nei suoi film il regista statunitense mette in primo piano la musica in molti modi. Ad esempio in "Un'altra donna" (1988) la Sinfonia n. 4 gioca un importante ruolo intra-diegetico che va oltre la semplice funzione informativa relativa all'ambiente sociale della protagonista. La musica di Mahler compare anche in altri film, ma in prospettiva più ampia agisce da elemento focale nella poetica di Allen. Attraverso l'analisi di alcune scene, si approfondisce la natura del rapporto tra Allen e Mahler e in che senso tale rapporto costituisce un caso assolutamente positivo di "ricezione mahler…
Context-aware summary generation for Web pages
2009
General purpose search engines provide users with lists of retrieved documents in response to their queries. The common structure of list elements includes the title of a document, its URL, and small snippet from the text. Snippets are evidence of occurrences of query's keywords in the document. The length of each snippet is just a couple of lines. They cannot play a role of summaries of retrieved documents: In many cases, they are not indicative and users cannot judge on the relevancy of documents. In our approach we use ontology as context description and that ontology will be used to describe user's main interest with respect to wanted summary and help to select weighting of key words an…
Adopting XML for Large-Scale Information
2011
This book has presented many different ways to encode information in XML format and the purposes for doing so. In this concluding chapter we consider problems related to managing XML information assets and the methods available to address those problems. Approaches for persistently storing XML data can be divided into file storage and database storage, and the research community has been especially active in designing new solutions for XML databases. However, adoption of XML often means massive migration procedures from some legacy data into the XML format; examples of migration cases are given. While describing the problems related to adopting XML, we give examples of the kinds of data fo…