Ceramics play a central role in the debates around the relationship between the Viru and the Moche. A recent model considers Negative and Moche-decorated ceramics produced by potters affiliated with the elites to be the cultural markers of the Viru and Moche populations, respectively. Due to the similarity of Viru and Moche plain-wares and the presence of Castillo Decorated ceramics in Viru and Moche contexts, this model sees both types of ceramics as domestic traditions, produced by independent potters and sharing a common technique. The research we present here supports this recent model by reconsidering the social and cultural meaning associated with these ceramic types: it uses a novel approach for South America of reconstructing the chaîne opératoire by studying the traces visible on ceramics at a macroscopic and microscopic scale. The study demonstrates how these potters used their own traditions to produce decorated and undecorated ceramics. Furthermore, we found that Castillo Decorated is a type produced only by Viru potters, and we argue that its presence in Moche contexts is evidence of the numerous exchanges maintained by these two populations.

Sai Island, in the Nile in northern Sudan, has a series of settlement sites spanning the entire period from the eighth millennium BC through to the Eighteenth Dynasty of the Egyptian New Kingdom. This long sequence provides an excellent opportunity to study continuity and discontinuity in long-term pottery traditions. Ceramics from the varying cultural phases of the occupation reflect changing dynamics between broader regional social identities, notably Kerma to the south and Egypt to the north. Combining studies of petrography with trace element composition and chaîne opératoire analysis, the authors present the first diachronic study of ceramic manufacture throughout the extended cultural history of Nubia, highlighting the varying manifestations of change and continuity.

The analyses of work traces in the shell objects found in the offerings of the Great Temple of Tenochtitlan, by scanning electron microscopy (SEM), has allowed to find an important group of objects made locally in Tenochtitlan. These shell pieces have been found in the constructive stages IVb to VII (1469-1520). Recently, another groups of objects have been found that present different work traces and that seems to be foreign productions. In this paper this new data will be presented and it will be discuss the possible origin of the objects.

Tamtoc is a very important archaeological site in San Luis Potosi, in the Central region of Mexico. The pre-Hispanic Huastec culture developed in this site (900-1100 A.D.). During the archaeological excavations, a large amount of lithic artifacts were recovered from burials and offerings. Among them, pieces of semitransparent crystalline objects of color blue, green, yellow and white and green stone pieces were discovered in one of the most important ceremonial precinct, inside a water reservoir of the monument 32 “The Priestess”. The aim of this work is to measure the composition of the artifacts for provenance study and to establish the manufacturing technique and tools used to produce them. For material analysis, a combined analysis involving X-ray Fluorescence (XRF) and Raman spectroscopy was applied. The main elements as well as some traces can be measured by XRF while the mineral identification can be established by Raman. The results indicate that most of the pieces are calcite with traces of rare elements.

On the other hand, experimental archaeology using a well established methodology of optical and electron microscopy examination of the manufacturing traces was applied. From this technological study the specific use of tools and materials were established for this site.

The work demonstrates a new approach to design of a level of intelligent control of robotic systems. The analytical model results in operational decisions. The structure of these decisions make them readily available to be implemented as an expert system. The approach is applied to a case study of mobile supervisory robots. The model presented here was motivated by manufacturing robotic systems and a type of autonomous robots that collect information at different sites for safety and other control purposes. The robot actions are directly affected by the obta~ned data. At each site the amount of available information (and thus the correctness of the robot decision) can be increased if the robot keeps collecting data at that site for a longer period of t~me. This means a delay in reacting and in reaching next site and accordingly, a decrease in the general amount of robot's information on the whole system.

The method of finding an economic amount of information collected by a robot at each site is based on the theory of controlled discrete event stochastic systems developed in our earlier works. This theory combines he basic concepts of discrete event control extended to stochastic systems with some aspects of information economics.

Although immunisation protocols for a wide variety of parasitic diseases have been developed, it is often questioned why these do not always reach the market. In this review information about the regulations and procedures that apply to licensing the production and marketing of medicinal preparations, especially parasite vaccines, is presented. These general regulations specify issues on product (quality, safety, efficacy and potency) and production (facilities and consistency). Vaccine developers and manufacturers have to comply with these regulations, which may involve years of research and development. Moreover, where the manufacturer claims specific features of the product, these claims have to be corroborated by (experimental) data. A series of principles has been used to develop vaccines against parasite infections varying from the use of (attenuated) live vaccines to killed vaccines and subunit vaccines. The implications of some specific regulatory issues associated with these approaches are discussed.

This article deals with the consumption and marketing of textiles in some Castilian areas during the first decades of the 17th century. The study uses a new documentary source: the 1618 inquiry. Part one describes the main characteristics of this documentary source. The second part analyzes textiles sales according to the fibre the different fabrics were made of. The third part presents some notes on the typology of the textiles sold in the country. This allows us to describe the marketing areas of two highly representative products of the Castilian woollen industry: the Segovian and Andalusian cloth. Finally, in the fourth and last part we have estimated the consumption of textile fabrics by household. This analysis has also been completed with a study of the terms of trade between grain and some textile fabrics between 1614 and 1616. The results support the hypothesis of a higher consumption of textile products in Andalusia than in Old Castile at the beginning of the 17th century.