MINERO‐PETROGRAPHIC STUDY OF COOKING WARE AND POMPEIAN RED WARE (ROSSO POMPEIANO) FROM CUMA (SOUTHERN ITALY)

Excavations carried out in Cuma by the Centre Jean Bérard archaeologists have uncovered a large quantity of pottery. This study is focused on cooking ware and on internal red‐slip cookware, also known as Pompeian Red Ware (Rosso Pompeiano), dated from the first century bc to the first century ad . A comparison with the minero‐petrographic composition of beach sands collected along the Bay of Naples coastline highlights the provenance of the temper from the Somma‐Vesuvius area, marked by leucite‐bearing scoriae and garnet. Petrochemical analyses allow us to distinguish two main groups of pottery characterized by different technological options based on the amount of temper and on the type of clay. X‐ray diffraction and scanning electron microscope data demonstrate improved accuracy in the production of Rosso Pompeiano, especially with regard to firing control, which was in a prevailing oxidizing atmosphere and in a narrow thermal range, between about 800 and 900°C.     

A NEW DATE FOR THE NEANDERTHALS FROM EL SIDRÓN CAVE (ASTURIAS,NORTHERN SPAIN)*

Torres et al. (2010 ) published a series of radiocarbon, AAR, ESR and OSL dates from the site of El Sidrón, northern Spain, which is notable for the discovery of the partial remains of 12 Neanderthals. Whilst the non‐radiocarbon methods suggested an age beyond 32 600–46 300 years, direct radiocarbon dates on the human fossils were inconsistent, ranging between 10 000 and 50 000 bp . This study uses the ultrafiltration pre‐treatment protocol to obtain a date of 48 400 ± 3200 bp (OxA‐21 776) on a bone fragment and confirm the antiquity of the Neanderthal assemblage. Moreover, it demonstrates the comparability of the ultrafiltration and ninhydrin bone radiocarbon pre‐treatment protocols, and highlights the need for appropriate screening methods where valuable collections with poor biomolecular preservation are sampled for collagen extraction.     

Stress‐induced temperature variations in groundwater of the Monferrato area (north‐western Italy)

Although characterized by low seismicity, the Monferrato area of north‐western Italy was affected by earthquakes, of magnitude M5.1 and M4.8, in 2000 and 2001. At the same time, marked changes were recorded in water temperature and chemistry in several wells within the epicentral area. In May 2004, an automatic network for the continuous monitoring of groundwater was installed in selected wells to study the phenomenon. Here, we report on data collected during a 3‐year period of groundwater monitoring. During the first year, episodes of water heating (by up to 20°C) were observed in one monitored well. The temporal analysis of the seismic activity recorded in the area revealed as almost all seismic events occurred during the period of elevated water temperatures. The similar timing of earthquakes and groundwater‐temperature anomalies suggests that both may be triggered by the same processes acting in the crust.     

A GEOLOGICAL PERSPECTIVE ON THE USE OF Pb ISOTOPES IN ARCHAEOMETRY

Lead isotope ratios in ore bodies and magmatic rocks depend in a complex way on several a priori independent parameters, including the geological age of the tectonic province in which the ores and magmas formed and its U/Pb (μ) and Th/U (κ) ratios, two very sensitive parameters characteristic of metal sources. All these parameters are entangled in hard‐to‐read Pb isotopic ratios. With respect to the commonly used fingerprinting techniques, which rely on the comparison of raw isotope ratios, the main motivation for the present work is to provide a method for making geologically and geochemically educated guesses about metal provenance even in the absence of isotopic data on reference ores. It shows how to unscramble a geological model age and μ and κ information from isotopic measurements. This approach brings to light a new organization of the Pb isotope database and an untapped wealth of information that can be used for provenance studies and other archaeometric purposes. We provide expressions with which to calculate these parameters and, using literature data, demonstrate how Pb isotopes in ores and magmas define clear zones in the silver‐rich provinces of the Central Andes. We further show how the geological model age and μ and κ values fingerprint production areas in 16th–18th century silver coins minted in Mexico and South America. Finally, we use Pb isotopes to illustrate how the Reconquista of the Emirate of Granada (1482–91) and the seizure of the Betic silver mines are reflected in the silver coins of the Catholic Monarchs.     

OUT-OF-PLANE SEISMIC RESISTANCE OF MASONRY WALLS

Seismic vulnerability of unreinforced masonry buildings is studied by means of simplified out-of-plane collapse mechanisms that take into account connections with transversal walls. According to experimental evidence, the analysis assumes that failure is reached with a rigid body motion of a part of the facade that falls down. Two classes of mechanism are examined: the overturning of the facade due either to a vertical crack at the connection or a diagonal crack on the transversal wall, both defined resorting to a simple model of masonry fabric, viewed as a regular assembly of rigid blocks and elastic plastic joints with friction but no cohesion. The use of simplified mechanisms give rise to an explicit evaluation of the seismic resistance to changes in the geometry and in the masonry fabrics, that could be used by practising engineers. This formulation is developed for both static horizontal actions and ground velocity peak, in the belief that the latter probably gives a better approximation of seismic action, while also providing, by comparison with the results of static forces, an estimate of the behaviour factor for unreinforced masonry. Eventually, the analytical forecasts are compared with numerical results obtained by means of the distinct element method.     

Mission without end? Peacekeeping in the African political marketplace

Since the mid-1990s the UN, in tandem with major western powers, has embarked upon an ambitious effort of peace support operations in Africa. The results of what we may call the 'Annan experiment' are not yet in. But there are good reasons to fear that, in many African countries, such peace operations have defend normative outcomes that are beyond realistic expectation, so that they can never hope to 'succeed'. This article examines the political and economic functioning of fragile African states using the lens of a 'political marketplace' in which local elites seek to obtain the highest reward for their loyalty, over short time horizons, within patrimonial systems. In such systems, political institutions are incapable of managing confect, which means that standard peacemaking efforts and peacekeeping operations do not align with domestic possibilities for settlement. To the contrary, external engagements can so distort domestic political markets that they obstruct national political bargaining and result in an open-ended commitment to peacekeeping in countries such as the Democratic Republic of Congo and Sudan.     

The Responsibility to Protect and the problem of military intervention

The Responsibility to Protect (R2P) has come a long way in a relatively short space of time. From inauspicious beginnings, the principle was endorsed by the General Assembly in 2005 and unanimously reaffirmed by the Security Council in 2006 (Resolution 1674). However, the principle remains hotly contested primarily because of its association with humanitarian intervention and the pervasive belief that its principal aim is to create a pathway for the legitimization of unilateral military intervention. This article sets forth the argument that a deepening consensus on R2P is dependent on its dissociation from the politics of humanitarian intervention and suggests that one way of doing this is by abandoning the search for criteria for decision‐making about the use of force, one of the centre pieces of the International Commission on Intervention and State Sovereignty 2001 report that coined the phrase R2P. Criteria were never likely to win international support, the article maintains, and were less likely to improve decision‐making on how best to respond to major humanitarian crises. Nevertheless, R2P can make an important contribution to thinking about the problem of military intervention by mitigating potential ‘moral hazards’, overcoming the tendency of international actors to focus exclusively on military methods and giving impetus to efforts to operationalize protection in the field.     

逆光摄影

漫步于乡间小径或钢筋丛林,不管烈日当头或是夕阳西下,旅途中,只要有一抹光线迎向你,按下快门,此刻的心绪便跃然纸上。逆光,是上天赐予的诸多光线形式中的神来之笔,它能让天地绚丽,又能让万物充满神秘之惑。     

TOMBS FOR THE DEAD,MONUMENTS TO ETERNITY: THE DELIBERATE DESTRUCTION OF MEGALITHIC GRAVES BY FIRE IN THE INTERIOR HIGHLANDS OF IBERIA (SORIA PROVINCE,SPAIN)

An interpretation of the features surrounding the complex and deliberate closure ritual in several collective Middle Neolithic tombs of the Ambrona Valley (Soria) is offered, where fire and quicklime played a major role in the rituals. The problems involved in the excavation and the understanding of this complex burial evidence are examined. The roles they might have played in the context of the important social and economic transformations of the local Neolithic groups around the end of the fourth millennium cal BC are also analysed. It is argued that the burial rituals tried to reinforce group solidarity at a time when the community was beginning to fragment, as the economic systems began to yield a surplus production whose management would have altered political structures.     

A late pre-Islamic burial at al-Khatt, U.A.E.

Gravegoods comprising local and imported pottery together with iron arrowheads were 'rescued'from a burial at al-Khatt, U.A.E., in 1993. Their relation to the chronology established at Mleiha suggests that they date from the late 3rd to early 2nd centuries BC, a period as yet little known in the Emirate of Ras al-Khaimah.