7 research outputs found
De la fouille à la vitrine : le statut de la céramique archéologique dans le cadre muséal
No full textExaminant les choix de conservation-restauration pour la céramique archéologique dans le cadre muséal, l'auteur tente de déterminer les liens entre l’attribution d’un statut et le niveau de réintégration proposé. L’étude et le traitement d’un dépôt chypriote auront pour but de faire valoir la reconnaissance de leurs valeurs plutôt que de déterminer le statut, favorisant leur compréhension et leur communication au public.Investigating the status of museum's archaeological ceramics and historical conservation’s choices regarding the level of reintegration for the museum display, the author propose a methodological recognition of these non-artworks artifacts’ values in the actual study and conservation process for a better understanding and communication of their historical and cultural complexity through exhibitions
A propos de deux méthodes d'ajustement de modèles mathématiques non linéaires
No full textpeer reviewe
The Magotteaux Mill((R))
No full textMany laboratory studies are completed each year exploring the flotation response of old and new ore sources. Most pay little attention to the impact grinding media has on down stream processing or even attempt to match the laboratory grinding chemistry to comparable plant data. The Magotteaux Mill ®, described in this paper, allows the user to measure, monitor and control the pulp chemical conditions during grinding. This ultimately means that it is now possible to prepare ore samples in the laboratory that have the same properties as those in the plant (i.e. particle size distribution and pulp chemistry). © 2004 Elsevier Ltd. All rights reserved
Safety of the Combination of PERC and YEARS Rules in Patients With Low Clinical Probability of Pulmonary Embolism: A Retrospective Analysis of Two Large European Cohorts
No full textBACKGROUND: This study aimed to determine the failure rate of a combination of the PERC and the YEARS rules for the diagnosis of pulmonary embolism (PE) in the emergency department (ED).
METHODS: We performed a retrospective analysis of two European cohorts of emergency patients with low gestalt clinical probability of PE (PROPER and PERCEPIC). All patients we included were managed using a conventional strategy (D-dimer test, followed, if positive, by computed tomographic pulmonary angiogram (CTPA). We tested a diagnostic strategy that combined PERC and YEARS to rule out PE. The primary endpoint was a thromboembolic event diagnosed in the ED or at 3-months follow-up. Secondary endpoints included a thromboembolic event at baseline in the ED and a CTPA in the ED. Ninety-five percent confidence intervals (CIs) of proportions were calculated with the use of Wilson\u27s continuity correction.
RESULTS: We analyzed 1,951 patients (mean ± SD age = 47 ± 18 years, 56% women) with an overall proportion of patients with PE of 3.5%. Both PERC and YEARS strategies were associated with 11 missed PE in the ED: failure rate 0.57 (95% CI = 0.32-1.02). At 3-month follow-up, the overall failure rate was 0.83% (95% CI = 0.51-1.35). Among the 503 patients who underwent a CTPA (26%), the use of the PERC-YEARS combination would have ruled out PE without CTPA in 249 patients (50% [95%CI = 45%-54%], absolute reduction 13% (95% CI = 11%-14%]).
CONCLUSION: The combination of PERC then YEARS was associated with a low risk of PE diagnostic failure and would have resulted in a relative reduction of almost half of CTPA
Modeling of immune life history and body growth: the role of antigen burden
No full textIn this paper, a recently developed mathematical model of age related changes in population of peripheral T cells (Romanyukha, Yashin, 2003) is used to describe ontogenetic changes of the immune system. The treatise is based on the assumption of linear dependence of antigen load from basal metabolic rate, which, in turn, depends on body mass following the allometric relationship – 3/4 power scaling law (Kleiber, 1932; West, Brown, 2005). Energy cost of antigen burden, i.e. the energy needed to produce and maintain immune cells plus the energy loss due to infectious diseases, is estimated and used as a measure of the immune system effectiveness. The dependence of optimal resource allocation from the parameters of antigen load is studied.
Triaging acute pulmonary embolism for home treatment by Hestia or simplified PESI criteria: the HOME-PE randomized trial
No full textAIMS: The aim of this study is to compare the Hestia rule vs. the simplified Pulmonary Embolism Severity Index (sPESI) for triaging patients with acute pulmonary embolism (PE) for home treatment. METHODS AND RESULTS: Normotensive patients with PE of 26 hospitals from France, Belgium, the Netherlands, and Switzerland were randomized to either triaging with Hestia or sPESI. They were designated for home treatment if the triaging tool was negative and if the physician-in-charge, taking into account the patient's opinion, did not consider that hospitalization was required. The main outcomes were the 30-day composite of recurrent venous thrombo-embolism, major bleeding or all-cause death (non-inferiority analysis with 2.5% absolute risk difference as margin), and the rate of patients discharged home within 24 h after randomization (NCT02811237). From January 2017 through July 2019, 1975 patients were included. In the per-protocol population, the primary outcome occurred in 3.82% (34/891) in the Hestia arm and 3.57% (32/896) in the sPESI arm (P = 0.004 for non-inferiority). In the intention-to-treat population, 38.4% of the Hestia patients (378/984) were treated at home vs. 36.6% (361/986) of the sPESI patients (P = 0.41 for superiority), with a 30-day composite outcome rate of 1.33% (5/375) and 1.11% (4/359), respectively. No recurrent or fatal PE occurred in either home treatment arm. CONCLUSIONS: For triaging PE patients, the strategy based on the Hestia rule and the strategy based on sPESI had similar safety and effectiveness. With either tool complemented by the overruling of the physician-in-charge, more than a third of patients were treated at home with a low incidence of complications.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
The Statistical Analysis about Variation in the Stock Market
No full textThe key objective of this paper is to investigate patterns in the German Stock Exchange which allows to make predictions about stock price behaviour. To find these patterns, the stock price data is classified and divided into different segments, by making use of Signal Processing, to be more specific, the Moving Average Filter. The methodology is developed on MATLAB with the company Continental AG, which is part of the DAX. The time period examined is 1998 to 2018 on a daily base. The analysis shows that there are patterns in the stock market and that it can be divided into segments.El objetivo clave de este trabajo es investigar patrones en la bolsa alemana el cual nos permite hacer predicciones del comportamiento de los precios del mercado. Para encontrar estos patrones, los precios están clasificados y divididos en diferentes segmentos usando el método Signal Processing, más especifico el Moving Average Filter. La metodología está desarrollada en MATLAB con los datos de la empresa Continental AG, la cual es parte del DAX. La muestra corresponde a 20 años comprendidos entre 1998 y 2018 con periodos diarios. El análisis muestra que hay patrones en el mercado y que se puede dividir en segmentos de comportamiento similar.A thesis submitted in fulfilment of the requirements for award of Master of Business Administration (M. Sc.) Double Degree To the European University Viadrina And Universidad Nacional de Colombia.Maestrí
