La Chine et les routes de la soie

I. Une carte de la route de la Soie du XVIe siècle découverte récemment au Japon En 2002, un musée japonais a vendu une peinture de ses réserves à peu près inconnue des spécialistes. Ce rouleau horizontal, large de 59 cm et long de 30,12 m, est peint sur soie. Endommagé partiellement à l’endroit où se trouvent habituellement un titre et des colophons, il avait été identifié par les conservateurs du musée comme une peinture de paysage des Qing (1644-1911). Pourtant, une étiquette était collée ..

Human Ecology, Process Philosophy and the Global Ecological Crisis

This paper argues that human ecology, based on process philosophy and challenging scientific materialism, is required to effectively confront the global ecological crisis now facing us

X-Ray Constraints on the Hot Gaseous Corona of Edge-on Late-type Galaxies in Virgo

We present a systematic study of the putative hot gas corona around late-type galaxies (LTGs) residing in the Virgo cluster, based on archival Chandra observations. Our sample consists of 21 nearly edge-on galaxies representing a star formation rate (SFR) range of ($0.2-3\rm~M_\odot~yr^{-1}$) a stellar mass ($M_*$) range of $(0.2-10) \times 10^{10}\rm~M_{\odot}$, the majority of which have not been explored with high-sensitivity X-ray observations so far. Significant extraplanar diffuse X-ray (0.5-2 keV) emission is detected in only three LTGs, which are also the three galaxies with the highest SFR. A stacking analysis is performed for the remaining galaxies without individual detection, dividing the whole sample into two subsets based on SFR, stellar mass, or specific SFR. Only the high-SFR bin yields a significant detection, which has a value of $L\rm_X \sim3\times10^{38}\rm~erg~s^{-1}$ per galaxy. The stacked extraplanar X-ray signals of the Virgo LTGs are consistent with the empirical $L\rm_X - SFR$ and $L\rm_X - M_*$ relations found among highly inclined disk galaxies in the field, but appear to be systematically lower than that of a comparison sample of simulated cluster star-formation galaxies identified from the Illustris-TNG100 simulation. The apparent paucity of hot gas coronae in the sampled Virgo LTGs might be understood as the net outcome of the long-lasting effect of ram pressure stripping exerted by the hot intra-cluster medium and in-disk star-forming activity acting on shorter timescales. A better understanding of the roles of environmental effects in regulating the hot gas content of cluster galaxies invites sensitive X-ray observations for a large galaxy sample.Comment: 18 pages, 7 figures. Accepted for publication in ApJ. Comments welcom

Zheng He's voyages to Hormuz: the archaeological evidence

The imperially sponsored maritime expeditions led by Zheng He in the early fifteenth century AD projected Ming Chinese power as far as Java, Sri Lanka and the East African coast. The Indian Ocean voyages are well documented in Chinese and Islamic historical accounts and by the nautical charts of Zheng He's journeys. Less clear has been the exact location of ancient Hormuz, the destination of Zheng He's voyages in the Persian Gulf. Recent re-analysis of ceramics from coastal southern Iran provides a solution. Archaeological evidence for Ming ceramics on present-day Hormuz Island and jewellery and gemstones of Iranian origin in southern China suggest that ancient Hormuz and Hormuz Island are one and the same

A Chinese Porcelain Jar Associated with Marco Polo: A Discussion from an Archaeological Perspective

As the first European to claim that he travelled to China and back, Marco Polo is a celebrated traveller who described the multicultural society of Eurasia in the thirteenth to fourteenth centuries ad. However, his famed account, the Travels of Marco Polo, contains many unsolved mysteries which have generated discussion among historians, while an archaeological approach has been even less convincing because the material that may link to Marco Polo is very rare. A recent re-analysis of Chinese ceramics from a wide geographical area ranging from southern China to the Indian Ocean provides some archaeological support: it suggests that a Chinese porcelain jar housed in the Treasury of San Marco in Venice dates to the era of Marco Polo and is associated with his journey to China

The normalized integral changes of the relevant time-related urinary marked metabolites induced by CR treatment.

<p>The normalized integral changes of the relevant time-related urinary marked metabolites induced by CR treatment.</p

Multivariate analysis of urine samples of pre-treatment, after 14 days of treatment and after 7 days of recovery.

<p>A, OPLS-DA score plot, B, OPLS-DA loadings s-plot.</p