Search results for "CONSTRUCTION"

Determination of Cochlear Duct Length With 3D Versus Two-dimensional Methods: A Retrospective Clinical Study of Imaging by Computed Tomography and Co…

2021

BACKGROUND The aim of this study was to compare three different methods for measurement of cochlear duct length (CDL) in the clinical setting for two different imaging modalities, namely computed tomography (CT) and cone-beam computed tomography (CBCT). PATIENTS AND METHODS One hundred temporal bone data sets (CT: n=50; CBCT: n=50) of non-malformed cochleae were retrospectively analyzed using three different CDL estimation techniques: 3D curved multiplanar reconstruction (cMPR), 2D cMPR and the A-value formula. RESULTS The data sets belonged to 60 patients (34 males, 26 females; mean age=50.28±18.58 years). For both imaging modalities, application of the 3D cMPR estimation technique led to …

“Deconstruction” in the Framework of Traditional Methodical Hermeneutics

1986

(1986). “Deconstruction” in the Framework of Traditional Methodical Hermeneutics. Journal of the British Society for Phenomenology: Vol. 17, No. 3, pp. 275-288.

THE WORD ZHEN貞 IN THE BOOK OF CHANGES: DECONSTRUCTION APPROACH

2020

Charge reconstruction in large-area photomultipliers

2018

Large-area PhotoMultiplier Tubes (PMT) allow to efficiently instrument Liquid Scintillator (LS) neutrino detectors, where large target masses are pivotal to compensate for neutrinos' extremely elusive nature. Depending on the detector light yield, several scintillation photons stemming from the same neutrino interaction are likely to hit a single PMT in a few tens/hundreds of nanoseconds, resulting in several photoelectrons (PEs) to pile-up at the PMT anode. In such scenario, the signal generated by each PE is entangled to the others, and an accurate PMT charge reconstruction becomes challenging. This manuscript describes an experimental method able to address the PMT charge reconstruction …

Time imaging reconstruction for the PANDA Barrel DIRC

2020

The innovative Barrel DIRC (Detection of Internally Reflected Cherenkov light) counter will provide hadronic particle identification (PID) in the central region of the PANDA experiment at the new Facility for Antiproton and Ion Research (FAIR), Darmstadt, Germany. This detector is designed to separate charged pions and kaons with at least 3 standard deviations for momenta up to 3.5 GeV/c, covering the polar angle range of 22$^{\circ}$-140$^{\circ}$. An array of microchannel plate photomultiplier tubes is used to detect the location and arrival time of the Cherenkov photons with a position resolution of 2 mm and time precision of about 100 ps. The time imaging reconstruction has been develop…

Inclusion of Inter Crystal Scatter data in PET

2012

In PET, as the spatial resolution of the measurement system is increased, multiple interactions of a single photon may be separately measured and such events are often removed from the data used in image reconstruction. While for some PET imaging tasks this effect is unimportant, for primate, brain and high-spatial-resolution imaging where sensitivity is important, such Inter Crystal Scattering (ICS) events may constitute a large fraction of the measured data. On-the-fly list-mode image reconstruction is generally required in order to use all the information provided by ICS. Simulated One-Pass List-mode image reconstruction is used in this investigation to study the inclusion of ICS informa…

Sensitivity recovery for the AX-PET prototype using inter-crystal scattering events

2014

The development of novel detection devices and systems such as the AX-positron emission tomography (PET) demonstrator often introduce or increase the measurement of atypical coincidence events such as inter-crystal scattering (ICS). In more standard systems, ICS events often go undetected and the small measured fraction may be ignored. As the measured quantity of such events in the data increases, so too does the importance of considering them during image reconstruction. Generally, treatment of ICS events will attempt to determine which of the possible candidate lines of response (LoRs) correctly determine the annihilation photon trajectory. However, methods of assessment often have low su…

Domain-specific intensifying constructions and/in weather-related proverbs. A case study based on Dutch dialects in Flanders.

2021

International audience; [Introduction] There are few things so rigorously present in human consciousness and communication as the subject of the weather. Nevertheless, both in formal (weather forecasts) and informal contexts (daily conversations), this “weather discourse” remains understudied within linguistics (Liégeois 2019). This kind of discourse (Koch & Oesterreicher 1985), however, appears very interesting to different constructionist approaches (Gautier 2018), such as frame semantics and (cognitive) construction grammar. [Research question] In this context, this proposal looks from a constructionist perspective into what could be called “weather sayings” in the dialects of Flanders; …

Le continuum lexique-grammaire en genre spécialisé à partir de corpus maison

2017

International audience; [Problématique et objectifs] La proposition, qui s’inscrit dans l’axe 5 de l’appel « Corpus, études contrastives et traduction » vise à interroger l’apport des corpus spécialisés maison (Loock 2016a, b) pour la mise au jour, pour la traduction professionnelle et la formation de traducteurs, des patrons lexico-grammaticaux inhérents à des moules textuels (Gautier 2009) hautement contraints, en langue(s) traduite(s). On discutera en particulier, à la suite de Kübler/Gledhill (2016 : 75), l’idée selon laquelle l’interrogation systématique de corpus homogènes permet d’aboutir à une représentation holistique vérifiée des interactions entre lexique et grammaire, surtout qu…

Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air

2020

[EN] Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, we investigate this dependence in air for light of wavelengths 260 nm and 450 nm using two complementary methods. We find that PTFE reflectance for thicknesses from 5 mm to 10 mm ranges from 92.5% to 94.5% at 450 nm, and from 90.0% to 92.0% at 260 nm We also see that the reflectance of PIFE of a given thickness can vary by as much as 2.7% within the same piece of material. Finally, we show that placing a specular reflector behind the PTFE can recover the loss of reflectan…