Response to the publication by Ueberall and Mueller-Schwefe

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Etograma de Parablennius sanguinolentus parvicornis (Valenciennes in Cuvier & Valenciennes, 1836) (Pisces: Blenniidae) dos Açores

No presente artigo concentramo-nos no etograma qualitativo de Parablennius sanguinolenrus parvicomis. O etograma inclui a descrição de cerca de quarenta padrões de comportamento ilustrados por desenhos baseados cm registos vídeo e fotografias. Os aspectos mais distinctivos do etograma, em contraste com outras espécies intertidais, são: i) a capacidade dos indivíduos para nadarem distâncias superiores a 1 metro sem contacto com o rundo. ii) a formação, pelo macho parental, de uma clareira em frente e à volta da entrada do ninho. iii) a incidência de padrões de comportamento com elevação do corpo em relação ao fundo (altamente conspícuo na natação sinal, mas também presente em muitas das actividades em que a natação é utilizada como modo de locomoção).ABSTRACT: This paper describes the ethogram of Parablennius sanguinolentus parvicomis. The ethogram includes the description of around forty patterns of behaviour illustrated by drawings mostly prepared from video recordings and photographs. The most distinctive features of the ethogram, by contrast with other common intertidal species, are: i) the capacity of the individuals to swim distances over 1 metre al one go, ii) the formation of a clearing in front of or around the nest entrance by the parental male, iii) the incidence of patterns or behaviour that elevate the body in relation to the bottom (highly conspicuous in signal swimming, but a150 present in all sets of activities in which swimming is used as a mode of locomotion)

Notas sobre os hábitos alimentares e comportamento predatório do mero, Epinephelus marginatus (Lowe, 1834) (Pisces: Serranidae) nos Açores

Entre 1992 e 1995, foram colhidos e examinados 57 exemplares de E. marginatus da ilha Terceira. Os seus comprimentos totais variaram entre 60 e 138 cm com duas categorias de tamanho. O coeficiente de vacuidade observado foi de 44,0% para exemplares de médio porte e 31,3% para grandes exemplares. As presas predominantes foram o polvo comum e peixes. Duas posturas de caça diferentes foram observadas e são descritas.ABSTRACT: Between 1992 and 1995, 57 individuals of E. marginatus were collected near Terceira Island. Their sizes ranged from 60 to 138 cm, total length, with two size categories. Stomach contents were analysed. Vacuity coefficient was 44,0% for medium size specimens and 31,3% for large specimens. Octopus and fishes were the dominant prey. Two different hunting postures were also observed and described

Você Conhece Esta Síndrome?

POEMS syndrome is a unique clinical entity, the diagnosis of which is made when polyneuropathy and monoclonal gammopathy occur together, associated with other changes such as organomegaly, endocrinopathy, skin changes and papilledema. Cutaneous manifestations are heterogeneous, with diffuse cutaneous hyperpigmentation, hemangiomas and hypertrichosis occurring more frequently. We report the case of a 65- year-old female patient with this syndrome, diagnosed after 15 years of disabling peripheral neuropathy

A Low-Voltage CMOS Buffer for RF Applications Based on a Fully-Differential Voltage-Combiner

Part 20: Electronics: RF ApplicationsInternational audienceThis paper presents a new CMOS buffer circuit topology for radio-frequency (RF) applications based on a fully-differential voltage-combiner circuit, capable of operating at low-voltage. The proposed circuit uses a combination of common-source (CS) and common-drain (CD) devices. The simulation results show good levels of linearity and bandwidth. To improve total harmonic distortion (THD) a source degeneration technique is used. The proposed circuit has been designed in a 130nm logic CMOS technology and it achieves a simulated gain of 1.54 dB, a bandwidth of 1.14 GHz for a total power dissipation of 13.34 mW, when driving an RF active probe (with 0.8 pF in parallel with 200 kΩ)

Electromagnetic radiation reaction and energy extraction from black holes: The tail term cannot be ignored

We study electromagnetic radiation reaction in curved space and the dynamics of radiating charged particles. The equation of motion for such particles is the DeWitt-Brehme equation, and it contains a particularly complicated, non-local, tail term. It has been claimed that the tail term can be neglected in certain magnetized black hole spacetimes, and that radiation reaction may then lead to energy extraction ("orbital widening") in the absence of an ergoregion. We show that such claims are incorrect, at least in the Newtonian limit: the tail term can never be neglected consistently in the relevant scenarios, and when it is included the reported energy extraction no longer occurs. Thus, previous results are called into question by our work.Comment: 7 pages, 1 figure. v2: minor changes, references added, matches final published version in PR

Duas novas ocorrências de Ziphiidae (Cetacea) nos Açores e actualização da lista de espécies de cetáceos

Os arrojamentos ocorridos em 1989, dum zífio, Ziphius cavirostris G. Cuvier, 1823, na ilha de Santa Maria, e duma baleia de bico-de-Gervais, Mesoplodon europaeus (Gervais, 1855) na ilha do Faial, representam os primeiros registos destas espécies paro o Arquipélago dos Açores. As medidas externas dos dois espécimes e a craniometria de M. europaeus são apresentadas. Fornece-se também uma lista actualizada das 22 espécies de cetáceos registados para as águas dos Açores, embora a presença de 3 delas seja actualmente duvidosa.ABSTRACT: Two standings in 1989 of a Cuvier’s Beaked Whale, Ziphius cavirostris G. Cuvier, 1823, on the Island of Santa Maria, and of a Gervais’ Beaked Whale, Mesoplodon europaeus (Gervais, 1855), on the Island of Faial, represent the first records of these species in the Azores archipelago. Body measurements of both specimens and the skull biometry of M. europaeus are presented. An updated checklist or 22 cetaceans recorded from the Azorean waters is also presented, although the presences of 3 of them are actually dubious