196,104 research outputs found
A replacement name for Pelophila Dörjes, 1968 (Xenacoelomorpha: Acoela, Convolutidae)
No full textThe following replacement name in Acoela (Xenacoelomorpha, Acoelomorpha) is proposed: Acoelopelophila Ceccolini & Cianferoni nom. nov. pro Pelophila Dörjes, 1968 nec Dejean, 1821. Further, the following new combination is also established: Acoelopelophila lutheri (Westblad, 1946) comb. nov.
urn:lsid:zoobank.org:pub:61A35F11-E912-474F-B7BB-2D2AF9911F39Se ha detectado un homónimo más moderno entre los Acoela (Xenacoelomorpha, Acoelomorpha) y se propone el siguiente nombre sustitutivo: Acoelopelophila Ceccolini & Cianferoni nom. nov. pro Pelophila Dörjes, 1968 nec Dejean, 1821. Se da también la siguiente nueva combinación: Acoelopelophila lutheri (Westblad, 1946) comb. nov
Monte Carlo simulation of the dose deposited into GAFCHROMIC® film by X-rays produced by the electron beam of PFMA-3
No full textThe electron beam emitted backward by Plasma Focus devices is being investigated as a radiation source for IORT (Intra-Operative Radiation Therapy) applications. A Plasma Focus device is being developed to this aim, to be utilized as an X-ray source. The electron beam is driven to impinge on a 50 μm brass foil, where conversion X-rays are generated. Monte Carlo simulations of the X-ray emission have been conducted with MCNPX, with the purpose of estimating penetration in and dose to human tissue. The electron spectrum had been determined experimentally and is used in the present work as input to the simulations. X-ray emission both from bremsstrahlung and from characteristic lines is predicted. The spectrum is found to be comprised of two components: one peaked at 10 keV and one centred around 50 keV. Doses to film determined from the present simulations are compared to experimental values obtained in a previous work by the authors: the results are found in very good agreement
The effect of x-ray scattering by water in the irradiation of cell cultures for the dosimetric characterization of a new prototype of IORT (Intra-Operative Radiation Therapy) device: Monte Carlo simulation and experimental validation
No full textThe electron beam emitted backward by plasma focus devices is being considered as a radiation source for Intra-Operative Radiation Therapy (IORT) applications. Radiobiological investigations have been conducted to assess the potential of this new prototype of IORT device. A standard x-ray beam, ISO-H60, was used for comparison, irradiating cell cultures in a holder filled with an aqueous solution. The influence of scattering by the culture water and by the walls of the holder was investigated to determine their influence on the dose delivered to the cell culture. MCNPX simulations were run and experimental measurements conducted. The effect of scattering by the holder was found to be negligible; scattering by the culture water was determined to give an increase in dose of the order of 10%.Health Phys. 105(4):000-000; 2013 © 2013 Health Physics Society
A range-based method to calibrate a magnetic spectrometer measuring the energy spectrum of the backward electron beam of a plasma focus
No full textThe electron beam emitted from the back of plasma focus devices is being studied as a radiation source for intraoperative radiation therapy applications. A plasma focus device is being developed for this purpose, and there is a need for characterizing its electron beam, particularly, insofar as the energy spectrum is concerned. The instrument used is a magnetic spectrometer. To calibrate this spectrometer, a procedure relying on the energy-range relation in Mylar R has been devised and applied. By measuring the transmission through increasing thicknesses of the material, electron energies could be assessed and compared to the spectrometer readings. Thus, the original calibration of the instrument has been extended to higher energies and also to better accuracy. Methods and results are presented
Il futuro di un Museo Universitario dal suo passato
No full textÈ in atto una riorganizzazione del Museo Gemma 1786 dell’Università di Modena e Reggio Emilia dedicato alle scienze della terra in previsione di una sua prossima sistemazione in una sede universitaria diversa dall’attuale. In questa prospettiva, si è offerta l’opportunità di avviare una lettura approfondita e critica delle collezioni storiche che compongono il Museo Universitario, come da tempo non era stata affrontata. La ricerca, tuttora in corso, ha cominciato ad investigare il patrimonio più antico del museo, le cui origini sono legate alle vicende settecentesche della Famiglia Estense; ed è proseguita nei principali archivi storici della città di Modena per analizzare i rapporti fra la storia del museo e l’evoluzione culturale e sociale della città. Queste azioni a carattere interdisciplinare e interistituzionale hanno permesso il riconoscimento di una cultura originale del patrimonio del Museo Universitario che, come primo risultato, ha trasformato in bene tangibile la prima importante donazione che nel 1819 la Famiglia Estense fece a quello che in origine era il Museo di Storia Naturale dell’Università di Modena. La consapevolezza di una propria autorevolezza culturale all’interno della realtà locale sta portando il Museo Universitario Gemma 1786 a rinnovare la propria missione e a creare nuove sinergie e prospettive di collaborazione
The effect of scattering by water on the irradiation of cell cultures for the dosimetric characterization of a new prototype of IORT (Intra-Operative Radiation Therapy) device: Monte Carlo simulation and experimental validation
No full textThe electron beam emitted backward by Plasma Focus devices is being considered as a radiation source for IORT applications. Radiobiological investigations have been conducted to assess the potential of this new prototype of IORT device. A standard Xray beam ISO-H60 was used for comparison, irradiating cell cultures in a holder filled with an aqueous solution. The influence of scattering by the culture water and by the walls of the holder was investigated to determine its influence on the dose delivered to the cell culture. MCNPX simulations were run and experimental measurements conducted. The effect of scattering by the holder was found to be negligible; scattering by the culture water was determined to give an increase in dose of the order of 10%
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Hydrometra stagnorum
No full textHydrometra stagnorum (Linnaeus, 1758) Material examined. Tzanata, stream, ca. 90 m a.s.l., 38.15069° N 20.73826° E (WGS 84; uncertainty = 100 m), 23.VII.2018, F. Cianferoni, F. Graziani, F. Ceccolini leg., 4 ♂♂, 1 ♀ brach., CFCF; Kateleios, stream, 35 m a.s.l., 38.07759° N 20.75291° E (WGS84; uncertainty = 15 m), 25.VII.2018, F. Cianferoni, F. Graziani, F. Ceccolini leg., 3 ♂♂, 3 ♀♀ brach., CFCF; Agios Nikolaos, Limni (= lake) Avithos, 290 m a.s.l., 38.17134° N 20.71032° E (WGS84; uncertainty = 10 m), 26.VII.2018, F. Cianferoni, F. Graziani, F. Ceccolini leg., 1 ♂, 3 ♀♀, 2 V instar nymphs, CFCF; Poros, Vohinas stream, residual pond, 2 m a.s.l., 38.15157° N 20.77317° E (WGS84; uncertainty = 10 m), 26.VII.2018, F. Cianferoni, F. Ceccolini, F. Graziani leg., 2 ♂♂, 2 ♀♀, CFCF. General distribution. This is a Turano-Europeo-Mediterranean species, also reaching northern Europe (see Andersen 1995, Kanyukova 2006). Remarks. This is the first record of this species from Cephalonia.Published as part of Cianferoni, Fabio, 2019, Review of the aquatic Hemiptera from Cephalonia, with a checklist for the Ionian Islands, Greece (Heteroptera: Gerromorpha, Nepomorpha, Leptopodomorpha) in Zootaxa 4576 (1), DOI: 10.11646/zootaxa.4576.1.2, http://zenodo.org/record/262465
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