Families of nested completely regular codes and distance-regular graphs

In this paper infinite families of linear binary nested completely regular codes are constructed. They have covering radius $\rho$ equal to $3$ or $4$, and are $1/2^i$-th parts, for $i\in\{1,\ldots,u\}$ of binary (respectively, extended binary) Hamming codes of length $n=2^m-1$ (respectively, $2^m$), where $m=2u$. In the usual way, i.e., as coset graphs, infinite families of embedded distance-regular coset graphs of diameter $D$ equal to $3$ or $4$ are constructed. In some cases, the constructed codes are also completely transitive codes and the corresponding coset graphs are distance-transitive

Extended Seismic Source Characterisation using Linear Programming Inversion in a Dual Formulation

A linear programming (LP) inversion method in a dual formulation was applied to reconstruct the kinematics of finite seismic ruptures. In a general setting, this approach can yield results from several data sets: strong ground motion, teleseismic waveforms or/and geodesic data (static deformation). The dual formulation involves the transformation of a normal solution space into an equivalent but reduced space: the dual space. The practical result of this transformation is a simpler inversion problem that is therefore faster to resolve, more stable and more robust. The developed algorithm includes a forward problem that calculates Green’s functions using a finite differences method with a 3D structure model. To evaluate the performance of this algorithm, we applied it to the reconstitution of a realistic slip distribution model from a data set synthesised using this model, i.e., the solution of the forward problem. Several other standard inversion approaches were applied to the same synthetic data for comparison

Optimized Multimode Interference Fiber Based Refractometer in A Reflective Interrogation Scheme

A fiber based refractometer in a reflective interrogation scheme is investigated and optimized. A thin gold film was deposited on the tip of a coreless fiber section, which is spliced with a single mode fiber. The coreless fiber is a multimode waveguide, and the observed effects are due to multimode interference. To investigate and optimize the structure, the multimode part of the sensor is built with 3 different lengths: 58 mm, 29 mm and 17 mm. We use a broadband light source ranging from 1475 nm to 1650 nm and we test the sensors with liquids of varying refractive indices, from 1.333 to 1.438. Our results show that for a fixed wavelength, the sensor sensitivity is independent of the multimode fiber length, but we observed a sensitivity increase of approximately 0.7 nm/RIU for a one-nanometer increase in wavelength

Lista dos Anelídeos (Annelida)

A diversidade das minhocas (Annelida) é aqui compilada, em adição aos grupos de animais terrestres listados em detalhe noutros capítulos deste livro (Platyhelminthes, Nematoda, Mollusca, Arthropoda, Chordata). Com base na recente lista de espécies animais terrestres da Europa, projecto “Fauna Europaea” (http:// www.faunaeur.org), listam-se 21 espécies de anelí deos terrestres. É apresentada a distribuição das espécies ou subespécies nas nove ilhas dos Açores, usando-se a seguinte simbologia: COR – Corvo; FLO – Flores; FAI – Faial; PIC – Pico; GRA – Graciosa; SJG – São Jorge; TER – Terceira; SMG – São Miguel; SMR – Santa Maria. Quando não se conhece a distribuição de uma espécie por ilha, indica-se apenas a sua presença nos Açores (AZ). Na maior parte dos casos tal deve-se a registos muito antigos ou então à indicação da ocorrência das espécies no arquipélago contida na “Fauna Europaea”, mas sem indicação da literatura de suporte.ABSTRACT: In addition to the terrestrial animal Phyla already listed in other chapters of this book (Platyhelminthes, Nematoda, Mollusca, Arthropoda, Chordata), here we compiled a preliminary species list of Annelida. Based on the recent list of European terrestrial species, project “Fauna Europaea” (http://www.faunaeur.org), 21 species of Annelida are listed. For the distribution of all species and subspecies in the nine Azorean islands we use the following abbreviations: COR – Corvo; FLO – Flores; FAI – Faial; PIC – Pico; GRA – Graciosa; SJG – São Jorge; TER – Terceira; SMG – São Miguel; SMR – Santa Maria. When no information concerning island occurrence was available only archipelago occurrence is given (AZ). In most cases it corresponds to old records, as well as to references to the Azores as found in “Fauna Europaea” with no indication to any literature supporting these findings

Estudo preliminar dos coleópteros (Insecta, Coleoptera) da Ilha das Flores.

IV Expedição Científica do Departamento de Biologia – Flores 1989.An account is given of the species of Coleoptera (Insecta, Coleoptera) collected during the "Flores 89 Scientific Expedition", in July 1989. A preliminary list of the species collected is given. Six species are reported as new for Flores and one for Corvo. A checklist of Coleoptera from Flores and Corvo is also given. We also point out the occurrence of each species on the other Azorean island and Macaronesian archipelagos, their zoogeographic distribution and the contributions of several authors over the last seven years