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"Petit, Michael"
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Methodology for an experimental drift velocity determination using a μTPC. Example in a 700mbar 95%He+5%CO2 mixture
The micro-irradiation, neutron metrology and dosimetry laboratory of the Institute for Radiological Protection and Nuclear Safety (IRSN) is a National Metrological Institute associated laboratory, is in charge of the neutron fluence distribution references and produces neutron reference fields.The laboratory is developing a primary neutron-detector based on the use of Time Projection Chamber technology. This detector, called µTPC, can use different types of gas over a range of precise pressures. The analysis of μTPC data requires the determination of both the energy and the track direction of the recoil particles. The drift velocity in the gas is a key data point for analysis. Based on several experimental measurements performed using the µTPC with monoenergetic neutron fields, a direct methodology to determine the drift velocity can be proposed. These results are compared with those found using theoretical drift velocity from the Magboltz simulation.
Conference Proceeding
Jessica Jones. 3, Return of the Purple Man
Jessica Jones is many things: private investigator, defender, survivor, mother. But when the most terrifying villain she's ever faced come back into her life, Jessica finds herself reliving her worst nightmare. The only thing worse than being stalked by the evil incarnate that is the Purple Man... is being stalked by the evil incarnate that is the Purple Man when you have a small child! As Killgrave finds new ways to torment his former pawn, he wreaks havoc across the Marvel Universe. But what curious thing does he want from Jessica this time? Never in the history of Marvel Comics has a horror so true and all-encompassing found its way to the door of one of our heroes. How can Jessica Jones and her family possibly survive it?
Book
Google and the Culture of Search
What did you do before Google?
The rise of Google as the dominant Internet search provider reflects a generationally-inflected notion that everything that matters is now on the Web, and should, in the moral sense of the verb, be accessible through search. In this theoretically nuanced study of search technology's broader implications for knowledge production and social relations, the authors shed light on a culture of search in which our increasing reliance on search engines influences not only the way we navigate, classify, and evaluate Web content, but also how we think about ourselves and the world around us, online and off.
Ken Hillis, Michael Petit, and Kylie Jarrett seek to understand the ascendancy of search and its naturalization by historicizing and contextualizing Google's dominance of the search industry, and suggest that the contemporary culture of search is inextricably bound up with a metaphysical longing to manage, order, and categorize all knowledge. Calling upon this nexus between political economy and metaphysics, Google and the Culture of Search explores what is at stake for an increasingly networked culture in which search technology is a site of knowledge and power.
eBook
Jessica Jones. 2, The secrets of Maria Hill
\"Jessica Jones is back where she belongs... taking on cases as Alias Investigations! But as the most dangerous book on the stands digs even deeper into the new mysteries of the Marvel Universe, Jessica has uncovered a truly startling secret. Is this case too hot for even her? Will it shatter everything she has built for herself? Can she put the pieces of her life back together... or is it already too late?\"--Amazon.com.
Book
Characterization and use of Stilbene scintillator for neutron metrology and spectrometry from 100 keV to 22 MeV
Stilbene scintillators have now the capability to extend the neutron energy measurement from 100 keV to 1 MeV. To be used as spectrometers, scintillators have to be characterized in entire energy range covered. For the photon characterization, usual calibration source determined the calibration and the resolution function. To do the photon matrix, MCNP PTRAC simulations were done between 59 keV up to 7 MeV. Using MCNP PTRAC allows the calculation of the photon response matrix from the tracking detail of the electron energy deposition in the crystal, including the effect of the Aluminum protection around. Resolution and sensibility obtained from gamma sources are applied later to the calculated photon matrix. For neutron characterization, Time-Of-Flight measurements on white neutron spectra were realized. However, the fluence reference on these spectra begins at 1 MeV. So, the shape of the response function was measured using stilbene scintillators on 100 keV1 MeV decade. After, the monoenergetic neutron reference of AMANDE facility was used to give neutron fluence normalization below 1 MeV. This method could characterize these scintillators for neutron energy from 100 keV up to 22 MeV.
Journal Article
The Defenders. Vol. 1, Diamonds are forever
Daredevil! Luke Cage! Jessica Jones! Iron Fist! Individually, these four heroes have been on the front lines of the battle to keep the streets of the city safe and secure! But now, with a deadly enemy from the dim past making a major move to unite the underworld, they will need to become more - they will need to become DEFENDERS!
Book
Investigation of the neutron-gamma ray discrimination performance at low neutron energy of a solution-grown stilbene scintillator
The results of experiments performed with a Ø25 x 25 mm solution-grown stilbene crystal in mono-energetic neutron fields in the 80-to-230 keV energy range are presented. The goal of the measurements, performed at the AMANDE facility, was to explore the capabilities of this organic scintillator to measure neutrons at the lowest possible energy with good pulse shape discrimination (PSD). The time of flight (TOF) technique was used in order to help with the neutron-gamma discrimination. The data are collected via a programmable digital acquisition (DAQ) system CAEN DT7530 using the software CoMPASS with the charge comparison method (CCM). The data are analysed using post-processing codes developed in the ROOT environment. The results show that the stilbene detector has discrimination capabilities for energies as low as 80 keV.
Journal Article
Ultimate comics. Spider-Man. Vol. 1
When a life-changing accident leaves Miles Morales with super powers, he assumes the identity of Spider-Man, learning about his power and responsibility from Spider-Woman.
Book
Modulation of CYP3a expression and activity in mice models of type 1 and type 2 diabetes
CYP3A4, the most abundant cytochrome P450 enzyme in the human liver and small intestine, is responsible for the metabolism of about 50% of all marketed drugs. Numerous pathophysiological factors, such as diabetes and obesity, were shown to affect CYP3A activity. Evidences suggest that drug disposition is altered in type 1 (T1D) and type 2 diabetes (T2D). The objective was to evaluate the effect of T1D and T2D on hepatic and intestinal CYP3a drug‐metabolizing activity/expression in mice. Hepatic and intestinal microsomes were prepared from streptozotocin‐induced T1D, db/db T2D and control mice. Domperidone was selected as a probe substrate for CYP3a and formation of five of its metabolites was evaluated using high performance liquid chromatography. Hepatic CYP3a protein and mRNA expression were assessed by Western blot and reverse‐transcription quantitative polymerase chain reaction respectively. Hepatic microsomal CYP3a activity was significantly increased in both T1D and T2D groups versus control group. Intestinal CYP3a activity was also significantly increased in both T1D and T2D groups. Moreover, significant increases of both hepatic CYP3a mRNAs and protein expression were observed in both T1D and T2D groups versus control group. Additional experiments with testosterone further validated the increased activity of CYP3a under the effect of both T1D and T2D. Although differences exist in the pathophysiological insults associated with T1D and T2D, our results suggest that these two distinct diseases may have the same modulating effect on the regulation of CYP3a, ultimately leading to variability in drug response, ranging from lack of effect to life‐threatening toxicity. e00082
Journal Article