Histoire et Sources des Mondes Antiques

We propose a microparticle localization scheme in digital holography. Most conventional digital holography methods are based on Fresnel transform and present several problems such as twin-image noise, border effects, and other effects. To avoid these difficulties, we propose an inverse-problem approach, which yields the optimal particle set that best models the observed hologram image. We resolve this global optimization problem by conventional particle detection followed by a local refinement for each particle. Results for both simulated and real digital holograms show strong improvement in the localization of the particles, particularly along the depth dimension. In our simulations, the position precision is > or =1 microm rms. Our results also show that the localization precision does not deteriorate for particles near the edge of the field of view.

In this book, an international team of experts draws upon a rich range of Latin and Greek texts to explore the roles played by individuals at ports in activities and institutions that were central to the maritime commerce of the Roman Mediterranean. In particular, they focus upon some of the interpretative issues that arise in dealing with this kind of epigraphic evidence, the archaeological contexts of the texts, social institutions and social groups in ports, legal issues relating to harbours, case studies relating to specific ports, and mercantile connections and shippers. While much attention is inevitably focused upon the richer epigraphic collections of Ostia and Ephesos, the papers draw upon inscriptions from a very wide range of ports across the Mediterranean. The volume will be invaluable for all scholars and students of Roman history.

Localization and energy efficiency is very important for UAVs. In this work, we propose a new mechanism for data routing based on localization in GPS-denied or GPS-challenged areas. The proposed mechanism relies on a weighted centroid localization technique, where the position of unknown UAV nodes are calculated using fuzzy logic. The UAV nodes are organized into clusters. The proposed localization algorithm first localizes the UAVs, then elects the next cluster head in order to minimize the energy consumption of the whole network and consequently increase its lifetime. Evaluation of the proposal shows that it is more efficient than the existing solutions in terms of energy consumption, localization accuracy, localization time, and data transmission.

We propose a microparticle detection scheme in digital holography. In our inverse problem approach, we estimate the optimal particles set that best models the observed hologram image. Such a method can deal with data that have missing pixels. By considering the camera as a truncated version of a wider sensor, it becomes possible to detect particles even out of the camera field of view. We tested the performance of our algorithm against simulated and experimental data for diluted particle conditions. With real data, our algorithm can detect particles far from the detector edges in a working area as large as 16 times the camera field of view. A study based on simulated data shows that, compared with classical methods, our algorithm greatly improves the precision of the estimated particle positions and radii. This precision does not depend on the particle's size or location (i.e., whether inside or outside the detector field of view).

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The Fourier modal method (FMM), often also referred to as rigorous coupled-wave analysis (RCWA), is known to suffer from numerical instabilities when applied to low-loss metallic gratings under TM incidence. This problem has so far been attributed to the imperfect conditioning of the matrices to be diagonalized. The present analysis based on a modal vision reveals that the so-called instabilities are true features of the solution of the mathematical problem of a binary metal grating dealt with by truncated Fourier representation of Maxwell's equations. The extreme sensitivity of this solution to the optogeometrical parameters is the result of the excitation, propagation, coupling, interference, and resonance of a finite number of very slow propagating spurious modes. An astute management of these modes permits a complete and safe removal of the numerical instabilities at the price of an arbitrarily small and controllable reduction in accuracy as compared with the referenced true-mode method.

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The potential of in-line digital holography to locate and measure the size of particles distributed throughout a volume (in one shot) has been established. These measurements are fundamental for the study of particle trajectories in fluid flow. The most important issues in digital holography today are poor depth positioning accuracy, transverse field-of-view limitations, border artifacts and computational burdens. We recently suggested an 'inverse problem' approach to address some of these issues for the processing of particle digital holograms. The described algorithm improves axial positioning accuracy, gives particle diameters with sub-micrometer accuracy, eliminates border effects and increases the size of the studied volume. This approach for processing particle holograms pushes back some classical constraints. For example, the Nyquist criterion is no longer a restriction for the recording step and the studied volume is no longer confined to the field of view delimited by the sensor borders. In this paper we present a review of the limitations commonly found in digital holography. We then discuss the benefits of the 'inverse problem' approach and the influence of some experimental parameters in this framework.

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Objective: Ascending thoracic aortic aneurysm (aTAA) is a major cause of human deaths. Despite important recent progress to better understand its pathogenesis and development, the role played by deranged hemodynamics on aTAA risk of rupture is still partially unknown. Our aim was to develop and apply a novel methodology to assess the correlation between aTAA rupture risk and hemodynamic biomarkers combining for the first time in vivo, in vitro, and in silico analyses. Methods: Computational fluid dynamic analyses were performed and validated on ten patients using patient-specific data derived from CT scan and four-dimensional MRI. Systolic wall shear stress, time-averaged wall shear stress (TAWSS), flow eccentricity (Floweccentricity), and helicity intensity (h2) were assessed. A bulge inflation test was carried out in vitro on the ten aTAA samples resected during surgical repair. The biomechanical and rupture properties of these samples were derived: the burst pressure, the physiological tangent elastic modulus (Ephysio), the Cauchy stress at rupture (σrupt), the rupture stretch (λrupt), and the rupture stretch criterion (Υstretch). Statistical analysis was performed to determine correlation between all variables. Results: Statistically highly significant (pruptand the TAWSS (r = 0.867 and p = 0.001) was found. Conclusion: This study shows that relatively low TAWSS significantly correlates with reduced rupture properties in aTAAs. Significance: Understanding the pathogenesis of aTAA remains crucial to reduce morbidity and mortality. Our aim is to establish possible correlations between aTAA rupture risk and hemodynamic biomarkers by combining for the first time in vivo, in vitro, and in silico analyses.

Abstract The ancient Egyptians mummified animals as part of cultic activity from the Late Period into the Roman era (7th century BC to the 4th century AD). Necropolises have provided millions of animal mummies, reflecting the religious fervor of Egyptians with regard to sacred animal cults during this period. Despite the number of sites containing mummies, and the number of mummies themselves, surprisingly little is known with regard to the nuances in the dating of the cults’ popularity and activities. As part of a multidisciplinary project, we have conducted a series of radiocarbon dates based on a group of animal mummies from the collection of the Musée des Confluences in Lyon, France. Thus, 63 specimens of animal mummies and their wrappings were analyzed to provide a range of dates for this practice. Results show that some correlations can be made between the popularity of particular species and the time period in which they were mummified. Monkeys and goats appear to have been among the first mummified species (from 800 BC), while antelopes appear to be a later addition to the corpus (30 BC to 4th century AD), thereby reflecting changes in thought processes, religious beliefs, and economic imperatives over time.

La question du stockage, telle que les sources écrites et archéologiques permettent de l’analyser pour l’Antiquité, est centrale dans notre compréhension des économies antiques. Le stockage apparaît au cœur d’une double problématique dans l’étude de l’approvisionnement : celle de l’organisation du commerce et plus particulièrement du commerce de transit d’une part, celle de la spéculation d’autre part. Les résultats obtenus au cours de ce programme ANR « Entrepôts et lieux de stockage du monde gréco-romain antique » permettent de dresser ici, pour le monde grec, un premier bilan, à travers l’étude des évolutions du vocabulaire, des structures archéologiques et des pratiques marchandes. Ces observations conduisent à une interrogation sur l’influence exercée par les pratiques romaines sur l’organisation des circuits commerciaux grecs.

The functionalization of spherical superparamagnetic iron oxide nanoparticles (SPION) of 10 nm with a linear monophosphonate (L1) and also PEGylated mono-phosphonated dendrons of growing generation (D2-G1, -G2 and -G3) yielded dendritic nano-objects of 15 to 30 nm in size, stable in physiological media and showing both renal and hepatobiliary elimination. The grafting of the different molecules has been confirmed by IR spectroscopy and elemental analysis. The colloidal stability of functionalized NS10 has been evaluated in water and in different physiological media. All functionalized NS10 were stable over a long period of time and displayed a mean hydrodynamic diameter smaller than 50 nm whatever the molecule architecture or dendron generation. Only the NS10@L1 showed less stability in biological media at high ionic concentration. NMRD profiles and relaxivity measurements highlighted the influence of the molecule architecture on the water diffusion close to the magnetic core thus influencing the relaxation properties at low magnetic field. Coupling of a fluorescent dye on the functionalized NS10 allowed investigating their biodistribution and highlighting urinary and hepato-biliary eliminations.

Abstract As a geographical term, Thessalia was used with a wide variety of meanings in Antiquity.¹ In the narrow sense it designated simply the four tetrades of the Thessalian Confederacy (Pelasgiotis, Hestiaiotis, Thessaliotis and Phthiotis (Arist. fr. 497, Rose; Andron (FGrHist 10) fr. 16a)); whereas in a broader sense it came to include areas such as Ainis, which supplied the Thessalian Confederacy of the Roman era with at least one strategos (cf. IG ix.2 p. xxv; see also infra on Strabo’s conception of the region).

Helly Bruno. La convention de Basaidai. In: Bulletin de correspondance hellénique. Volume 94, livraison 1, 1970. pp. 161-189.

This chapter contains section titled: The Principal Cults The Sacralized Structure of Daily Life The Manufacturing of Heroes for the City: The Dead Lacedaemonians Conclusion

J.‑Chr. Couvenhes, H.-L. Fernoux (éds)

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An ancient Egyptian crocodile mummy (MHNL 90001591, Musée des Confluences, Lyon, France) dating to the Roman period and discovered at Kom Ombo (Upper Egypt) was analysed through synchrotron multiscale microtomography. Using this advanced technology, the virtual autopsy of the animal was carried out without affecting the bones, flesh, balms and linen bandages. The technique allows for the precise analysis of the specimen's bones and tissue, enabling us to establish the cause of death and the last meal(s) of the animal. From these data, we can conclude that this crocodile was hunted while living in the wild. This is the first evidence for this mode of obtaining animals to produce mummies. With this case study, it is apparent that the praxis related to the mummification of animals in ancient Egypt are more diverse than the current Egyptological reconstruction of that phenomenon.