241 research outputs found
Manuel de Parasitologie Vétérinaire du Chien et du Chat, de Marco Genchi, Giorgio Traldi, Claudio Genchi. Traduction et adaptation : Mario Cervone. MED’COM Editeur (2019)
No full textDupouy-Camet Jean. Manuel de Parasitologie Vétérinaire du Chien et du Chat, de Marco Genchi, Giorgio Traldi, Claudio Genchi. Traduction et adaptation : Mario Cervone. MED’COM Editeur (2019). In: Bulletin de l'Académie Vétérinaire de France tome 172, 2019. p. 186
Systems Design of MARIO: Stand-alone 16U CubeSat from Earth to Mars
No full textMars Atmospheric Radiation Imaging Orbiter (MARIO) is a 16U stand-alone CubeSat mission that shall escape Earth, perform autonomous deep-space cruise, achieve ballistic capture, and enter an operational orbit at Mars to perform thermal radiation imaging. This work focuses on the systems design of MARIO. The design of combined chemical—-electric propulsion systems, comprising FLP-106 based green chemical monopropellant thruster and the iodine-fueled RF ion thruster, for hybrid high-thrust--low-thrust Earth--Mars transfer is presented. Reflectarrays along with high-gain antennas are utilised to establish long-distance low-bandwidth X-band communication link with the Earth. Electrical power system design is pursued to provide steady power to the system during the transfer and science operations phases. A novel autonomous navigation strategy is proposed which includes horizon-based optical navigation near target bodies and deep-space line-of-sight navigation for accurate state estimation for autonomous operations. Details regarding on-board processing, attitude determination, and thermal control are delineated. Feasible budgets for mass and communications link are obtained. The structural composition of MARIO is detailed
Dialogues on Architecture
No full textDialogues on Architecture is a series of dialogues between researchers and practitioners, who are embracing the intellectual model of high technology and are involved in its advancement and application in architecture. Dialogue #4 focuses on the technology transfer between on-and off-Earth research and its impact on society, and in particular on industry and education. The dialogue takes place between Henriette Bier (HB), Paul Chan (PC), Advenit Makaya (AM), and Angelo Cervone (AC).History, Form & AestheticsDesign & Construction ManagementSpace Systems Egineerin
On the electronic states of macrocycles of the extended porphyrin family and their coordination compounds
No full textThe electronic absorption spectra of Ni, Zn and Mg hemiporphyrazine derivatives are presented and discussed together with theoretical results obtained by INDO/S computations. The absorption spectra of all the metal derivatives show marked red shifts of the lowest energy absorption bands with respect to those of the metal free hemiporphyrazine. The possible explanation that in metal derivatives low lying excited states with a fully conjugated π electron system are present is supported by theoretical computations
Prévalence des parasites digestifs avant et pendant la chimiothérapie anticancéreuse chez des chiens atteints de lymphome multicentrique
No full textEn médecine humaine, l’administration de molécules anticancéreuses représente un facteur de risque pour le développement d’infections opportunistes d’origine bactérienne, mycosique ou parasitaire. Parmi les parasites digestifs, Strongyloides stercoralis, Cryptosporidium spp, Cystoisospora spp et Blastocystis hominis sont les parasites les plus fréquemment rencontrés chez des patients traités par chimiothérapie anticancéreuse (ChA). En médecine vétérinaire, seuls des rapports de cas ont été publiés concernant les infestations parasitaires chez des chiens ou chats recevant un traitement anticancéreux ou immunomodulateur. Le but de cette étude était d’investiguer la prévalence et les espèces parasitaires chez des chiens atteints de lymphome multicentrique (LM) et traités par ChA
On the electronic states of the extended porphyrin family
No full textThe ground and lower excited electronic singlet and triplet states of eight macrocycles resulting from porphyrin by replacing pyrroles with pyridines or indoles and the meso methines by nitrogens (the extended porphyrin family) have been treated by Skala's version of the CNDO/S method in view of providing systematic reference computational data. The results are especially useful for comparisons capable of throwing light on the structure-property relations that make some of those macrocycles especially active for energy and electron transfer. A brief discussion is given. The uniqueness of porphyrin stands out clearly, but some of its features may be strictly related to the biochemical environment of heme groups, so that other macrocycles of the family might be better suited for technological applications simulating the in vivo behavior of porphyrin derivatives. Hints concerning the effect of coordination to metal atoms are given, pending the completion of a parallel study on some metal complexes of the family. A few novel experimental results from our laboratories are mentioned in the discussion
The Radiation Environment and effects analysis of the LUMIO Mission
No full textThe Earth-Moon system is constantly bombarded by meteoroids of different size and impact speed. Observation of the impacts on the Moon can enable thorough characterization of the Lunar meteoroid flux, which is similar to that of the Earth. While Earth-based Lunar observations are restricted by weather, geometric and illumination conditions, a Lunar-based observation campaign can improve the detection rate and, when observing the Lunar far side, complement in both space and time the observations taken from Earth. The Lunar Meteoroid Impact Observer (LUMIO), one of the two winning concepts of the ESA SysNova Lunar CubeSats for Exploration challenge, is a mission designed to observe, quantify, and characterize the micro-meteoroid impacts on the Lunar far side. It is based on a 12U CubeSat that carries the LUMIO-Cam, a custom-designed optical instrument capable of detecting light flashes in the visible spectrum. The spacecraft is placed on a halo orbit about the Earth–Moon L2 point, where permanent full-disk observation of the Lunar far side can be performed with excellent quality, given the absence of Earth background noise. After passing Phase 0 and an independent feasibility study in the ESA Concurrent Design Facility, the mission has successfully completed its Phase A in March 2021. Although the Phase 0 design of the LUMIO spacecraft was assessed as feasible by the ESA CDF study, a number of critical issues were identified, which have been tackled by the Phase A design. The paper presents the outcome of this Phase A design effort for the LUMIO spacecraft. Particularly relevant changes or updates in the spacecraft design include: a consolidated design of the LUMIO-Cam, with longer baffle for straylight protection; a set of ADCS sensors and actuators with increased redundancy; a combination of Direct-to-Earth communication and inter-satellite link with a mothership in Lunar orbit; use of Earth ranging to complement and validate the current innovative autonomous navigation strategy based on optical observations of the Moon by means of the LUMIO-Cam; re-assessment of the COTS components selection for the power and propulsion systems.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Space Systems Egineerin
Poetics of the incarnation: Middle English writing and the leap of love
No full textThe Gospel of John describes the Incarnation of Christ as the Word made flesh -an intriguing phrase that uses the logic of metaphor but is not traditionally understood as merely symbolic. Thus the conceptual puzzle of the Incarnation also draws attention to language and form: what is the Word; how is it related to language; how can the Word become flesh? Such theological questions haunt the material imagery engaged by medieval writers, the structural forms that give their writing shape, and even their ideas about language itself. In Poetics of the Incarnation, Cristina Maria Cervone examines the work of fourteenth-century writers who, rather than approaching the mystery of the Incarnation through affective identification with the Passion, elected to ponder the intellectual implications of the Incarnation in poetical and rhetorical forms. Cervone argues that a poetics of the Incarnation becomes the grounds for working through the philosophical and theological implications of language, at a point in time when Middle English was emerging as a legitimate, if contested, medium for theological expression. In brief lyrics and complex narratives, late medieval English writers including William Langland, Julian of Norwich, Walter Hilton, and the anonymous author of the Charters of Christ took the relationship between God and humanity as a jumping-off point for their meditations on the nature of language and thought, the elision between the concrete and the abstract, the complex relationship between acting and being, the work done by poetry itself in and through time, and the meaning latent within poetical forms. Where Passion-devoted writing would focus on the vulnerability and suffering of the fleshly body, these texts took imaginative leaps, such as when they depict the body of Christ as a lily or the written word. Their Incarnational poetics repeatedly call attention to the fact that, in theology as in poetics, form matters
Internal and External Parasitic Infections of Pet Reptiles in Italy
No full textIn captive reptiles, parasites may represent a serious health and management problem and may include zoonotic species. In the present study, prevalence of ecto and endoparasitic infections and associated main clinical signs were evaluated in pet reptiles living in Italy. To these aims, faecal samples collected from 120 captive reptiles of 27 different species, including 63 household pet and 57 pet store reptiles, were analysed macroscopically and microscopically for the isolation and identification of endoparasites. All animals, the terrariums and water containers were examined also for ectoparasite arthropods. Recovered arthropods were preserved in 80% ethanol and microscopically identified. Data were statistically analysed. Overall, about 72.5% of examined animals were found positive with prevalence rates of 45% and of 27.5% for endo and ectoparasites, respectively. Pet shop animals were more frequently infected by endoparasites, while ectoparasites were more prevalent in household animals. Isolated endoparasites included protozoa (Entamoeba sp., Balantidium sp., Isospora jaracimrmani and Caryospora corallae) and nematodes (ascarids, pinworms and strongylid nematodes), while ectoparasites included the mites Ophionyssus natricis, Hirstiella stamii and Hirstiella diolii and the tick Amblyomma latum. This study is the first report of H. stamii, H. diolii and A. latum in Italy.
Results showed that pathogenic and potential zoonotic parasites are common among pet reptiles and highlight the role of veterinarians for the control of pet reptile parasitic diseases and the prevention of introducing exotic reptile parasitic specie
Modular impulsive green monopropellant propulsion system (Mimps-g): For cubesats in leo and to the moon
No full textGreen propellants are currently considered as enabling technology that is revolutionizing the development of high-performance space propulsion, especially for small-sized spacecraft. Modern space missions, either in LEO or interplanetary, require relatively high-thrust and impulsive capabilities to provide better control on the spacecraft, and to overcome the growing challenges, particularly related to overcrowded LEOs, and to modern space application orbital maneuver requirements. Green monopropellants are gaining momentum in the design and development of small and modular liquid propulsion systems, especially for CubeSats, due to their favorable thermophysical properties and relatively high performance when compared to gaseous propellants, and perhaps simpler management when compared to bipropellants. Accordingly, a novel high-thrust modular impulsive green monopropellant propulsion system with a micro electric pump feed cycle is proposed. MIMPS-G500mN is designed to be capable of delivering 0.5 N thrust and offers theoretical total impulse ITot from 850 to 1350 N s per 1U and >3000 N s per 2U depending on the burnt monopropellant, which makes it a candidate for various LEO satellites as well as future Moon missions. Green monopropellant ASCENT (formerly AF-M315E), as well as HAN and ADN-based alternatives (i.e., HNP225 and LMP-103S) were proposed in the preliminary design and system analysis. The article will present state-of-the-art green monopropellants in the (EIL) Energetic Ionic Liquid class and a trade-off study for proposed propellants. System analysis and design of MIMPS-G500mN will be discussed in detail, and the article will conclude with a market survey on small satellites green monopropellant propulsion systems and commercial off-the-shelf thrusters.</p
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