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This paper deals with the investigation of the solution of the time-fractional telegraph equation in higher dimensions with $\psi$-Hilfer fractional derivatives. By application of the Fourier and $\psi$-Laplace transforms the solution is derived in closed form in terms of bivariate Mittag-Leffler functions in the Fourier domain and in terms of convolution integrals involving Fox H-functions of two-variables in the space-time domain. A double series representation of the first fundamental solution is deduced for the case of odd dimension. The results derived here are of general nature since our fractional derivatives allow to interpolate between Riemann-Liouville and Caputo fractional derivatives and the use of an arbitrary positive monotone increasing function $\psi$ in the kernel allows to encompass most of the fractional derivatives in the literature. In the one dimensional case, we prove the conditions under which the first fundamental solution of our equation can be interpreted as a spatial probability density function evolving in time, generalizing the results of Orsingher and Beghin (2004). Some plots of the fundamental solutions for different fractional derivatives are presented and analysed, and particular cases are addressed to show the consistency of our results. info:eu-repo/semantics/acceptedVersion

In this work we present some new representations for the eigenfunctions of the time-fractional wave operator with the time-fractional derivative in the Caputo sense. info:eu-repo/semantics/publishedVersion

In this short paper, we consider a ψ-fractional Sturm-Liouville eigenvalue problem by using left ψ-Caputo and right ψ-Riemann-Liouville fractional derivatives. We study the main properties of the eigenfunctions and the eigenvalues of the associated fractional boundary problem. published

The goal in this study was to evaluate the production of sheep and forage silvopastoral systems ( SPS s ) with cashew trees, compar ed to the production on grass monoculture. The treatments consisted of three grazing systems: one Massai grass monoc ulture Panicum maximum cv Massai) (MONO), and two SPS s: intercrop of Massai grass + cashew tree Anacardium occidentale) (S M) and intercrop of grass Massai grass + Estilosantes Campo Grande ( Stylosanthes capitata × S. macrocephala ) + cashew tree SME) in a completely randomized split plot design with four replications. Made available in DSpace on 2022-06-29T18:19:21Z (GMT). No. of bitstreams: 1 ProductivityPerformanceSheepSilvopastoralJAS10.2022.pdf: 578832 bytes, checksum: 233ee1b1b8b1c6433ff912e47b00cf87 (MD5) Previous issue date: 2022

Made available in DSpace on 2021-07-09T02:19:24Z (GMT). No. of bitstreams: 1 Aguirre-Exp-Acarology.pdf: 1225791 bytes, checksum: 19a3df91170324d43694d6c355bbb6d1 (MD5) Previous issue date: 2021

This paper describes the challenges raised from the use of Unmanned Aerial Vehicles (UAVs) on the exploration of inhospitable places that present limitations and risks to humans; for instance, we describe the case of cave exploration. UAVs have emerged as an attractive alternative for performing this task in a safety and reliable manner. However, challenges regarding control management, accurate positioning and navigation, and reliable wireless connectivity need to be addressed in order to achieve effective solutions. Herein, we address those challenges and present possible solutions for enabling the use of UAVs in harsh environments.

Submitted by Maria Rodrigues (mrodrigues@ua.pt) on 2018-04-11T13:35:52Z No. of bitstreams: 1 fdc-08-06.pdf: 365570 bytes, checksum: ae2296001f1080d6833f022dc660417f (MD5) Approved for entry into archive by Diana Silva(dianasilva@ua.pt) on 2018-04-23T15:48:29Z (GMT) No. of bitstreams: 1 fdc-08-06.pdf: 365570 bytes, checksum: ae2296001f1080d6833f022dc660417f (MD5) Made available in DSpace on 2018-04-23T15:48:29Z (GMT). No. of bitstreams: 1 fdc-08-06.pdf: 365570 bytes, checksum: ae2296001f1080d6833f022dc660417f (MD5) Previous issue date: 2018

Avaliou-se o comportamento de ovinos Santa Inês na fase de terminação em sistema silvipastoril de capim-massai com cajueiro com ou sem estilosantes Campo Grande. Foi avaliada a massa de forragem, estrutura do pasto e os tempos de pastejo, ruminação, ócio, deslocamento, taxa de bocado dos animais e a frequência com que cada espécie foi pastejada. Apesar da maior massa de forragem total no pasto com estilosantes, massa de folhas verdes, incluindo a leguminosa, não diferiu entre os tratamentos. A presença da leguminosa modificou a estrutura do dossel, com elevação da altura e da proporção de colmo. O tempo de pastejo e a taxa de bocado não diferiram entre os tratamentos, uma vez que a oferta de folhas verdes foi semelhante entre os tratamentos (6,32% do PV). Apesar de no pasto com estilosantes a leguminosa contribuir com 23,43% da composição botânica, a reduzida relação folha:haste (0,37) não foi suficiente para influenciar no comportamento dos animais. Em sistema silvipastortil com cajueiro, apesar de provocar modificações na estrutura do capim-massai, a presença de estilosantes Campo Grande em 23% do pasto não é suficiente para modificar o comportamento de pastejo de ovinos em terminação.