11,835 research outputs found

    XMM-Newton observations of SNR 1987A. II. The still increasing X-ray light curve and the properties of Fe K lines

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    Aims. We report on the recent observations of the supernova remnant SNR 1987A in the Large Magellanic Cloud with XMM-Newton. Carefully monitoring the evolution of the X-ray light curve allows to probe the complex circumstellar medium structure observed around the supernova progenitor star. Methods. We analyse all XMM-Newton observations of SNR 1987A from January 2007 to December 2011, using data from the EPIC-pn camera. Spectra from all epochs are extracted and analysed in a homogeneous way. Using a multi-shock model to fit the spectra across the 0.2-10 keV band we measure soft and hard X-ray fluxes with high accuracy. In the hard X-ray band we examine the presence and properties of Fe K ines. Our findings are interpreted in the framework of a hydrodynamics-based model. Results. The soft X-ray flux of SNR 1987A continuously increased in the recent years. Although the light curve shows a mild flattening, there is no sudden break as reported in an earlier work, a picture echoed by a revision of the Chandra light curve. We therefore conclude that material in the equatorial ring and out-of-plane HII regions are still being swept-up. We estimate the thickness of the equatorial ring to be at least 4.5x10^16 cm (0.0146 pc). This lower limit will increase as long as the soft X-ray flux has not reached a turn-over. We detect a broad Fe K line in all spectra from 2007 to 2011. The widths and centroid energies of the lines indicate the presence of a collection of iron ionisation stages. Thermal emission from the hydrodynamic model does not reproduce the low-energy part of the line (6.4-6.5 keV), suggesting that fluorescence from neutral and/or low ionisation Fe might be present.Comment: 4 pages, 3 figures, 2 tables. Accepted for publication in Astronomy and Astrophysic

    Da Montepulciano a Mylapore

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    Il lavoro, prendendo le mosse da un libro recentemente uscito in Italia su Roberto De Nobili (1577-1656), discute aspetti problematici della sua figura, in particolare per ci\uf2 che riguarda il rapporto fra tradizione religiosa indiana, conosciuta dal missionario gesuita anche grazie all'apprendimento del sanscrito, del tutto straordinario per l'epoca, e verit\ue0 evangelica

    Cronaca di etimologia sanscrita. Parte II

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    Con la presente Cronaca (qui la sua II parte) si intendono presentare informazioni bibliografiche recenti su una serie di problemi etimologici relativi al lessico sanscrito, particolarmente vedico, corredando, all'occasione, le informazioni di una riinnovata discussione dei problemi stessi. Lo scopo principale \ue8 quello di fornire un supplemento all'Etymologisches W\uf6rterbuch des Altindoarischen di M. Mayrhofer (gli ultimi Nachtr\ue4ge und Verbesserungen sono del 1999-2000), e con ci\uf2 quindi uno strumento di lavoro simile, se pur pi\uf9 modesto nei suoi propositi, alle Chroniques d'\ue9tymologie grecque/latine pubblicate nella "Revue de Philologie, de Litt\ue9rature et d'Histoire Anciennes", che sono state finora basate sui dizionari etimologici di Chantraine e, risp., Ernout-Meillet. In stretta connessione con l'etimologia sono presi in considerazione anche problemi connessi con l'interpretazione dei testi vedici e con la ricostruzione di realia culturali. Il presente numero include lemmi da \ue1pa a \ue1yas- e un supplemento al numero precedente. Vi hanno altres\uec collaborato R. Ronzitti, M. Salvatori. di D. Maggi sono la premessa dal tit. In memoria [di M. Mayrhofer] e le voci ak\u16bp\u101r\u101-, \ue1tri-, \ue1dhvan-, \ue1napta-, \ue1nas-, anum\u101na-, anuvy\u101khy\u101na-, an\u16bp\ue1-, \ue1pa, apac\uedt-, ap\ue1d-, apapitv\ue1-, \ue1pas-, apasalav\ued, ap\u101n\ue1-, ap\u101m\u101rg\ue1-, ap\u101lamb\ue1-, ap\u101l\u101\u301-, \ue1pi, apikak\u1e63\ue1-, ap\u12bcy\ue0-, ap\u16brv\ue1-, apt\ufar-, \ue1pnav\u101na-, \ue1pnas-, ab\u12b\u1e63\u1e6dak\u101-, \ue1bda-, abhak\u1e63ya-, \ue1bhaya-, abh\u101va-, abh\ued, abhic\u101r\ue1-, abhidharma-, abhipitv\ue1-, abhipram\ufar-, abhivla\u1e45g\ue1-, abhi\u301\u15basti-, abhi\u1e63ek\ue1-, abh\u12bl\u12b-, abhr\ue1-, \ue1mati-, \ue1matra-, amant\ufa-, AMI, am\ufa-, amr\u325\u301ta-, amn\ue1s, ambaka-, \ue1mbara-, amla-, AY1, ay- (~ i-), \ue1ya-, \ue1yas-. Abstract: With this Report (here the n\ub0 2) we present recent bibliographical information and, occasionally, renewed discussion about a series of etymological problems of Sanskrit, particularly Vedic, lexicon. Our principal aim is to supplement the Etymologisches W\uf6rterbuch des Altindoarischen by M. Mayrhofer (last Nachtr\ue4ge und Verbesserungen 1999-2000). So with our Report we would like to provide a tool similar, even though more modest in its proposals, to the Chroniques d\u2019\ue9tymologie grecque and latine published in the \u201cRevue de Philologie, de Litt\ue9rature et d\u2019Histoire Anciennes\u201d \u2013 whose points of reference were at the starting, in their turn, the etymological dictionaries respectively by Chantraine et Ernout-Meillet. In close connexion with etymology we will also consider problems related to the interpretation of Vedic texts and the reconstruction of cultural realia. The present number includes lexems from \ue1pa to \ue1yas-, along with a supplement to n\ub0 1. R. Ronzitti is the author of the entries \ue1cch\u101, \ue1dri-, apadh\u101 \u301, ap\u16bp\ue1-, \ue1pr\u101yu-, apsar\ue1s-, apsuj\uedt-, \ue1bhva-, \ue1mbhas-2, ambhr\u325\u1e47\ue1-2 (entirely); apasalav\ued, ap\u101l\u101 \u301-, apikak\u1e63 \ue1-, apt\ufar-, \ue1pnas-, abhipitv\ue1-, abhr\ue1-, \ue1matra-, amn\ue1s (partially, with D. Maggi); ambar\u12b\ub4\u1e63 a-, AY2 (partially, with M. Salvatori); M. Salvatori of the entry \ue1patya- (entirely); ambar\u12b\ub4\u1e63 a-, AY2 (partially, with R. Ronzitti); D. Maggi of the entries as mentioned before and of the remaining ones

    Cronaca di etimologia sanscrita. Parte I

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    Con la presente Cronaca (qui la sua I parte) si intendono presentare informazioni bibliografiche recenti su una serie di problemi etimologici relativi al lessico sanscrito, particolarmente vedico, corredando, all'occasione, le informazioni di una riinnovata discussione dei problemi stessi. Lo scopo principale \ue8 quello di fornire un supplemento all'Etymologisches W\uf6rterbuch des Altindoarischen di M. Mayrhofer (gli ultimi Nachtr\ue4ge und Verbesserungen sono del 1999-2000), e con ci\uf2 quindi uno strumento di lavoro simile, se pur pi\uf9 modesto nei suoi propositi, alle Chroniques d'\ue9tymologie grecque/latine pubblicate nella "Revue de Philologie, de Litt\ue9rature et d'Histoire Anciennes", che sono state finora basate sui dizionari etimologici di Chantraine e, risp., Ernout-Meillet. In stretta connessione con l'etimologia sono presi in considerazione anche problemi connessi con l'interpretazione dei testi vedici e con la ricostruzione di realia culturali. Il presente numero include lemmi da a- a \ue1p-

    El patrimonio eclesiastico del Arzobispado de La Plata

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    Las manifestaciones de religiosidad, concretadas en edificaciones arquitectónicas (templos), esculturas, óleos, retablos, imágenes en alto relieve, vasos sagrados, ornamentos, música sacra, libros incunables y un sinfín de obras de arte, tienen tanto de valor artístico - histórico como de gran valor pastoral- espiritual, válidos para el acercamiento entre los hombres y hacia Dios. Las iglesias, capillas y oratorios de la Arquidiócesis de La Plata forman parte de este bagaje. Estas se construyeron a través de un lapso de tiempo no muy amplio, lo que nos llega a nuestros días se realizó fundamentalmente durante principios del siglo XIX y del XX, son escasos los testimonios del siglo XVIII

    The course of cancer related fatigue up to ten years in early breast cancer patients. What impact in clinical practice?

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    Little is known about the cancer related fatigue (CRF) along cancer course and risk factors that could predict CRF development and persistence in breast cancer (BC) survivors. This prospective study detected incidence, timing of onset, duration of CRF, impact on QoL and psychological distress. Seventy-eight early BC patients, undergoing chemotherapy (CT) followed or not by hormonal therapy were assessed for QoL and psychological distress by EORTC QLQC30 and HADs questionnaires. Fatigue was investigated with mix methods, structured interview and psychometric measures. A qualitative analysis was added to assess the behavioral pattern of CRF. Low fatigue levels were identified after surgery (9%), increasing during (49%) and at the end of CT (47%), maintaining after 1 year (31%) and declining up to ten years of follow-up. Prevalence of CRF was higher at the end of CT and lower at follow-up. At the end and after 1 and 2 years from CT, persistence of CRF was associated to anxiety in 20%, 11% and 5% and to depression in 15%, 10% and 5% respectively. A relationship between CRF and psychological distress was observed; patients presenting depression and anxiety before CT were at higher risk for fatigue onset at a later period. A relationship between fatigue and QoL was noted at the end of CT. Our study shows the fatigue timely trend in early BC patients from surgery, CT and follow-up. Identification of biological, psychological, social predictor factors related to fatigue could be helpful for early interventions in patients at higher risk of developing fatigue

    XMM-Newton study of 30 Dor C and a newly identified MCSNR J0536-6913 in the Large Magellanic Cloud

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    Aims: We present a study of the superbubble (SB) 30 Dor C and the newly identified MCSNR J0536-6913 in the LMC. Methods: All available XMM-Newton data (exposure times of 420 ks EPIC-pn, 556 ks EPIC-MOS1, 614 ks EPIC-MOS2) were used to characterise the thermal X-ray emission in the region. An analysis of the non-thermal X-rays is also presented and discussed in the context of emission mechanisms previously suggested in the literature. These data are supplemented by X-ray data from Chandra, optical data from the MCELS, and radio data from ATCA and MOST. Results: The brightest thermal emission was found to be associated with a new supernova remnant, MCSNR J0536-6913. X-ray spectral analysis of MCSNR J0536-6913 suggested an ejecta-dominated remnant with lines of O, Ne, Mg, and Si, and a total 0.3-10 keV luminosity of ~8E+34 erg/s. Based on derived ejecta abundance ratios, we determined the mass of the stellar progenitor to be either ~18 M_sun or as high as >40 M_sun, though the spectral fits were subject to assumptions (e.g., uniform temperature and well-mixed ejecta). The thermal emission from the SB exhibited enrichment by alpha-process elements, evidence for a recent core-collapse SNR interaction with the SB shell. We detected non-thermal X-ray emission throughout 30 Dor C, with the brightest regions being highly correlated with the H-alpha and radio shells. We created a non-thermal spectral energy distribution for the north-eastern shell of 30 Dor C which was best-fit with an exponentially cut-off synchrotron model. Conclusions: Thermal X-ray emission from 30 Dor C is very complex, consisting of a large scale SB emission at the eastern shell wall with the brightest emission due to MCSNR J0536-6913. The fact that the non-thermal spectral energy distribution of the SB shell was observed to roll-off is further evidence that the non-thermal X-rays from 30 Dor C are synchrotron in origin.Comment: 22 pages, 21 figures, accepted for publication in Astronomy and Astrophysic

    Interestingness of traces in declarative process mining: The janus LTLPf Approach

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    Declarative process mining is the set of techniques aimed at extracting behavioural constraints from event logs. These constraints are inherently of a reactive nature, in that their activation restricts the occurrence of other activities. In this way, they are prone to the principle of ex falso quod libet: they can be satisfied even when not activated. As a consequence, constraints can be mined that are hardly interesting to users or even potentially misleading. In this paper, we build on the observation that users typically read and write temporal constraints as if-statements with an explicit indication of the activation condition. Our approach is called Janus, because it permits the specification and verification of reactive constraints that, upon activation, look forward into the future and backwards into the past of a trace. Reactive constraints are expressed using Linear-time Temporal Logic with Past on Finite Traces (LTLp f). To mine them out of event logs, we devise a time bi-directional valuation technique based on triplets of automata operating in an on-line fashion. Our solution proves efficient, being at most quadratic w.r.t. trace length, and effective in recognising interestingness of discovered constraints

    Enhancing declarative process models with DMN decision logic

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    Modeling dynamic, human-centric, non-standardized and knowledge-intensive business processes with imperative process modeling approaches is very challenging. Declarative process modeling approaches are more appropriate for these processes, as they offer the run-time flexibility typically required in these cases. However, by means of a realistic healthcare process that falls in the aforementioned category, we demonstrate in this paper that current declarative approaches do not incorporate all the details needed. More specifically, they lack a way to model decision logic, which is important when attempting to fully capture these processes. We propose a new declarative language, Declare-R-DMN, which combines the declarative process modeling language Declare-R with the newly adopted OMG standard Decision Model and Notation. Aside from supporting the functionality of both languages, Declare-R-DMN also creates bridges between them. We will show that using this language results in process models that encapsulate much more knowledge, while still offering the same flexibility
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