Search results for "Learning"
showing 10 items of 6669 documents
The impact of feature extraction on the performance of a classifier : kNN, Naïve Bayes and C4.5
2005
"The curse of dimensionality" is pertinent to many learning algorithms, and it denotes the drastic raise of computational complexity and the classification error in high dimensions. In this paper, different feature extraction techniques as means of (1) dimensionality reduction, and (2) constructive induction are analyzed with respect to the performance of a classifier. Three commonly used classifiers are taken for the analysis: kNN, Naïve Bayes and C4.5 decision tree. One of the main goals of this paper is to show the importance of the use of class information in feature extraction for classification and (in)appropriateness of random projection or conventional PCA to feature extraction for …
Improving Nearest Neighbor Based Multi-target Prediction Through Metric Learning
2017
The purpose of this work is to learn specific distance functions to be applied for multi-target regression problems using nearest neighbors. The idea of preserving the order relation between input and output vectors considering their corresponding distances is used along a maximal margin criterion to formulate a specific metric learning problem. Extensive experiments and the corresponding discussion try to put forward the advantages of the proposed algorithm that can be considered as a generalization of previously proposed approaches. Preliminary results suggest that this line of work can lead to very competitive algorithms with convenient properties.
La percezione dei docenti di insegnamento-apprendimento nel periodo emergenziale COVID-19: una ricerca nella Scuola Siciliana
2021
La didattica a distanza nel periodo di emergenza COVID-19 ha rappresentato una novità senza precedenti cui docenti e studenti non erano preparati. L’indagine sull'esperienza di 1364 insegnanti siciliani ha consentito di raccogliere informazioni sulle strategie organizzative e didattiche attivate, sulle criticità e sulla valutazione dell'efficacia didattica degli interventi effettuati. Sono state rilevate in modo sistematico le percezioni dei docenti relative all’autoregolazione e in particolare alla pianificazione, alle strategie di gestione delle informazioni, di correzione, e di valutazione. La ricerca nasce dal desiderio di accrescere la consapevolezza dei docenti. Conoscere gli effett…
Uno strumento di insegnamento e apprendimento riflessivo nella formazione degli insegnanti al tempo del Covid: lo storytelling digitale
2021
Tra le varie forme narrative, negli ultimi anni si sta diffondendo l’uso del cosiddetto “storytelling digitale”, ovvero uno strumento attraverso il quale lo studente può raccontarsi e ritrovare tutti gli elementi caratterizzanti un’esperienza didattica vissuta. Il contributo si propone l'obiettivo di valutare in termini di soddisfazione e percezione del proprio apprendimento, la ricaduta dell’esperienza narrativa da parte degli studenti universitari che hanno frequentato a distanza nel primo semestre dell’anno accademico 2020-21, il corso di Docimologia previsto al secondo anno (cattedra M-Z) del Corso di Studi in Scienze della Formazione Primaria, attraverso l’impiego dello storytelling di…
Educational innovations in Eastern countries. Final Conference of Erasmus + project Fostering Competencies Development in Belarusian Higher Education
2020
Erasmus + KA2 programme project “Fostering Competencies Development in Belarusian Higher Education – FOSTERC” consortium partners have met for the Final Conference in Minsk, Belarus, on the 6 th of December 2019. It was an exciting moment. “FOSTERC” consortium worked together since 2016, many meetings, trainings, common research and creative work have been implemented in a cooperative way. The final “FOSTERC” event has summarised transformations and novelties that have been created in Belarus higher education institutions during the last three years. This article shortly reviews some insights and solutions that have been discussed during the “FOSTERC” conference in Minsk.
The development of reflective learning in the context of health counselling and health promotion during nurse education.
2001
The development of reflective learning in the context of health counselling and health promotion during nurse education Aims and background. The purpose of this follow-up study was to describe the development of reflective learning of 16 student nurses in the context of health counselling and promotion during clinical training of a 3-year nursing education programme in two Finnish polytechnics. The first aim was to analyse the levels of reflectivity in the student nurses’ reflections on their videotaped counselling situations. The second aim was to explore the qualitative features of the reflective health counselling learning process in the context of health promotion. The theoretical backg…
Ecosistemas locales de aprendizaje ante la globalización tecnológica. Retos de los modelos educativos digitales pospandemia
2021
La educación frente a la covid-19 ha puesto en práctica una infinidad de respuestas, todas urgentes, tentativas, generadas por ensayo y por error, y todavía pendientes de validación. Para comprender mejor el impacto de estas respuestas, el presente artículo defiende, partiendo de la teoría de los ecosistemas de aprendizaje, la necesidad de investigar cómo han influido las tecnologías de ámbito global en la construcción de experiencias locales de aprendizaje. Además, pone de manifiesto la necesidad de estudiar qué tipo de apoyo tanto teórico como práctico se requiere para reconducir los posibles efectos nocivos de la introducción de la tecnología de emergencia. A tal efecto, se describen las…
2020
Critical evaluation skills when using online information are considered important in many research and education frameworks; critical thinking and information literacy are cited as key twenty-first century skills for students. Higher education may play a special role in promoting students' skills in critically evaluating (online) sources. Today, higher education students are more likely to use the Internet instead of offline sources such as textbooks when studying for exams. However, far from being a value-neutral, curated learning environment, the Internet poses various challenges, including a large amount of incomplete, contradictory, erroneous, and biased information. With low barriers t…
Evaluation of a Support Vector Machine Based Method for Crohn’s Disease Classification
2019
Crohn’s disease (CD) is a chronic, disabling inflammatory bowel disease that affects millions of people worldwide. CD diagnosis is a challenging issue that involves a combination of radiological, endoscopic, histological, and laboratory investigations. Medical imaging plays an important role in the clinical evaluation of CD. Enterography magnetic resonance imaging (E-MRI) has been proven to be a useful diagnostic tool for disease activity assessment. However, the manual classification process by expert radiologists is time-consuming and expensive. This paper proposes the evaluation of an automatic Support Vector Machine (SVM) based supervised learning method for CD classification. A real E-…
Inclusive education in Finland: present and future perspectives.
1994
The movement to integrate special education students into normal school classes started to develop in Finland in the 1960s. At the same time, the number of students labeled “special” in the Finnish comprehensive school system exploded from 2% to 17% of all school children. Presently, 84% of all special education placements are part-time placements. Special schools and special classes comprise 15% of all special education placements, while full inclusion is only 1% of all special education placements. Some factors affecting the current integration of special students and the development of integration are discussed.