29,363 research outputs found
Discontinuous Almost Automorphic Functions and Almost Automorphic Solutions of Differential Equations with Piecewise Constant Argument
In this article we introduce a class of discontinuous almost automorphic
functions which appears naturally in the study of almost automorphic solutions
of differential equations with piecewise constant argument. Their fundamental
properties are used to prove the almost automorphicity of bounded solutions of
a system of differential equations with piecewise constant argument. Due to the
strong discrete character of these equations, the existence of a unique
discrete almost automorphic solution of a non-autonomous almost automorphic
difference system is obtained, for which conditions of exponential dichotomy
and discrete Bi-almost automorphicity are fundamental
Modelling a layer for real-time management of interactions in web based distance learning
In the last few years, the University of Aveiro, Portugal, has been offering several distance learning courses
over the Web, using e-learning platforms.
Experience showed that different editions of a same course, using the same contents and structure, and having
similar target learners, had different success rates. What would be the reason for that?
A hypothesis was considered: The level of success could be directly related with the remote follow-up of the
learners’ participation in the courses; the best results usually occur when the follow-up is closer.
The existing e-learning platforms offer and the standardization works being developed by organizations and
consortiums like IMS (IMS Global Learning Consortium, Inc), ADL SCORM (Advanced Distributed Learning
Sherable Content Object Reference Model), IEEE LTSC LOM (Institute of Electrical and Electronic Engineers
Learning Technologies Standard Committee Learning Object Metadata), ARIADNE (ARIADNE Foundation
for the European Knowledge Pool), AICC CMI (Aviation Industry CBT Committee Computer Managed
Instruction), etc, don’t cover the course monitorization concerns mentioned. Those projects were focused on
aspects like contents and its delivery in the context of the execution of the courses’ activities. This is even
true in the SCORM project that doesn’t include any reference to the management of the e-learning processes.
Recently, in the context of the IMS Global Consortium, a new project designated IMS LD (Learning Design) is
under development, providing a framework for the description of learning units under a three level model. In
the most recently defined level, the C level, some functionalities related to notifications were proposed,
expressing similar concerns to the ones that triggered our research. However, the extent at which IMS LD
takes the functionalities is, from our point of view, not complete.
This article describes a proposal of a reference model and functionalities towards a specification of a layer for
real-time management of user interactions on LMSs, and its possible integration with the ADL SCORM
standard proposal. The paper includes a discussion of the management metadata model for the LMS
sub-system and how the integration of the management module under SCORM may be achieved
Enhancing web supported learning in higher education by adding a management layer to LMSs
There are many situations in the e-Learning experiences
that can compromise the success of the courses. Many
times simple reasons are great enough to motivate people
to abandon them. For example, if someone does not
execute a programmed activity inside the defined window
of time, it can compromise the rest of the course to that
person. In such situations it would be important that the
teacher knew about the situation in useful time, to be able
to take any corrective action.
Another example could be presented, involving the
professor and the learners. Let us assume that an activity
A2 is programmed to be executed by the learners and that
it depends on the previous knowledge of the result of the
evaluation of a work submitted by the learners to the
teacher (activity A1). If the teacher doesn’t inform the
learners about their classification in useful time, that can
compromise the execution of the activity A2.
It seems to be necessary to use mechanisms of automatic
management, in real time, of the envolvement of each
participant in a distance learning course using LMS
(Learning Management System). Such a functionality
allows the detection of deviations to the scheduled
activities planned for each actor. If it is the case, the
referred mechanism can initiate the process of sending
notifications to the relevant entities, enabling the
correction of these deviations.
Several organizations and consortiuns, involving the
industry, governmental institutions and universities, are
developing projects of standardization. It seemed
important to us to see how the referred aspects were
covered by those projects, and to perceive how it could be
possible to articulate our work with the ones that are
available from these organizations and consortiuns.
This article describes the work that the authors are
developing towards the specification of a layer for
real-time management of user interactions with LMSs,
during the operationalization of a course, and also
includes a management meta-data model, related to that
management layer
Effective action in DSR1 quantum field theory
We present the one-loop effective action of a quantum scalar field with DSR1
space-time symmetry as a sum over field modes. The effective action has real
and imaginary parts and manifest charge conjugation asymmetry, which provides
an alternative theoretical setting to the study of the particle-antiparticle
asymmetry in nature.Comment: 8 page
Ações voltadas em educação ambiental para crianças de quatro a oito anos em oficinas no projeto Rondon
Trabalho apresentado no II Congresso Nacional do PROJETO RONDON, realizado em Florianópolis, SC, no período de 23 a 25 de setembro de 2015 - Universidade Federal de Santa Catarina.A educação ambiental de forma contrária a educação tradicional, é uma educação coletiva, na qual seu conteúdo está na realidade socioambiental dos indivíduos ultrapassando os muros da escola (GUIMARÃES, 2007). À vista disso, o estímulo à percepção ambiental pelas crianças quanto às noções básicas de entendimento, respeito e cuidado com o meio ambiente torna-se fundamental. Apresentar as atividades realizadas em oficinas de educação ambiental com crianças de quatro a oito anos durante operação do Projeto Rondon. Tais atividades visaram despertar o interesse das crianças para os assuntos relacionados com o meio ambiente e, em especial com as florestas. As atividades desenvolveram-se durante a Operação Itacaiúnas do Projeto Rondon em julho de 2015 no município de Rondon do Pará, tendo foco a comunidade mais fragilizada socioeconomicamente. Realizaram-se quatro oficinas nomeadas: 1- “O Refúgio”, que tinha como objetivo fornecer a ideia das dificuldades que os animais enfrentam a se abrigarem frente ao desmatamento; 2 - “Boliche da Floresta” que objetivou ensinar sobre os componentes que constituem uma floresta; 3- “Se lixando” que trouxe informações referentes à redução, reutilização e reciclagem do lixo; 4- “Careca-cabeludo” que permitiu que as crianças acompanhassem o desenvolvimento de uma planta. As atividades realizaram-se de forma satisfatória apresentando grande aceitação pelas crianças. Foi interessante notar as diferenças estruturais e culturais da comunidade observada nas atividades, visto que foram planejadas numa realidade diferente da população local. Com isso, foi necessário, de forma geral, realizar alterações na metodologia das atividades para atender o tema nas adversidades locais. Como resultado da operação do Projeto Rondon em si, pode-se destacar um significativo crescimento pessoal, coletivo e profissional, fruto do impacto sociocultural e do trabalho em conjunto com a população local. No total foram envolvidas mais de 46 crianças tanto na zona urbana quanto na zona rural do município. Pode-se ressaltar a importância da educação ambiental como um processo contínuo na formação das crianças, pois, apesar das ações do projeto assumir um caráter pontual, o saber ambiental se solidifica num sentimento de pertencimento e corresponsabilidade frente aos diversos problemas ambientais observados cotidianamente
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