In the present paper, a new improved expression for -ray detection efficiency of Ge(Li) detectors,
, is given. It is represented as a continuous function of x (viz. E–1) with a maximum and decreases very rapidly to a small positive value as -ray energy, E, drops to 40 keV or lower, but slowly as E rises to 1.7 MeV or higher. Since it can well represent the whole physical process of the -ray detection, this expression may be one of the simplest and most precise representations, for
at the present time.
The article attempts
to identify the possible origins of the iconography of a scene depicting Osiris
in TT 65, the late Ramesside tomb of Imiseba. Revealing an apparent dependence
on representations of the ruling king in Theban tombs of the early Eighteenth
Dynasty, an analysis is presented of these, most particularly of that of the
vizier Useramun (TT 131). Consequently, it also offers an argument in favour of
considering the Middle Kingdom tomb TT 60 as providing the eventual model for
the early Thutmoside scenes.
Marcus Aurelius saved the Roman army in the Barbaricum in the war against the Germans (during the Marcomannic wars) around 172 AD. He followed the various pagan and Christian versions of the lightning and rain miracles. During his work he collected the antique and medieval sources concerning the miracles from the beginning of the 3rd century (Tertullian) to the 14th century. The author examined the possible (and heavily disputed) date of the events and their representations in the Column of Marcus Aurelius.
The author describes the late Copper Age finds that were recovered during the digging of a cellar at Vác, among them an amphora, which was decorated with a realistic cattle head. According to the ornaments and the shape, the vessel can be dated from the middle phase of the Boleráz group and it stands without analogues among the zoomorphic representations of the Baden culture. Its uniqueness underlines that it was prepared not with a profane purpose: it must have had a specific role, it perhaps contained corn offering. The cattle head representation is also linked with the important role the animal played in the life of the Baden population.
Regarding the Mithras cult, Pannonia had an exceptional status in the Roman Empire. This unique status was connected with the huge numbers of military forces stationed there. Numerous inscriptions and altars give evidence that Pannonia had an uncommon sensitivity for religions; this is why some local characteristics and relief-versions could be made, for example: dadophores with pelta shields, and unique dedicational forms which are mostly known in Pannonia, and perhaps spread from there to other parts of the Empire. In my paper, I want to show the connections between Mithras and Sol on their Pannonian representations.
Authors:R. Figueroa, D. Caro, A. Vargas, A. Gordon, and V. Poblete
A methodology of comparison is presented as a way to determine the origin of ceramic fragments proceeding from clays and archaeological sites of the 9th Region of Chile, analyzed through X-ray fluorescence (XRF) spectroscopy. Net areas of peak of sample spectra, are analysed using the graphic polygonal method, developed previously.1,2 Criterions of comparison have been defined as a way to determine similarity degrees and proceeding places. Polygonal representations used are triangles, squares, pentagons and hexagons; the similarity grading among samples is defined. Results are compared with clay samples and sand removing effects on fragments are also defined.
This brief description of cyclic activation analysis includes both a theoretical interpretation, by way of graphical representations
and experimental considerations, for the determination of the concentration of elements by measurement of short-lived isotopes.
Particular attention is given to the effect of sample transfer and the half-life of the background matrix. The use of a Ge(Li)
detector and a low energy photon detector of intrinsic Ge, are also summarily discussed based on the experience of the authors'
work in biological and environmental samples and the establishment of rapid, routine, multielemental and instrumental techniques.
Jia and Nathanson  give a simple and explicit construction of minimal asymptotic bases of orderh for everyh=2. They constructed minimal asymptotic bases from partition of N by means of powers of 2. In this paper, we extend the results of that paper to asymptotic bases constructed from partitions of N by means ofg-adic representations forg=2. Corollary 3 shows that given partition N=W0?W1?...?Wh-1 such that eachWi contains infinitely many pairs of consecutive integers we can construct a minimal asymptotic bases of orderh in infinitely many way.
An approach to optimization of research based on the theory of experiment and scientometrics is proposed. Research is treated as an experiment aimed at attainment of optimal conditions. The following successive phases of optimization have been singled out: selection of optimisation parameters and factors, carrying out the experiment, and processing and interpreting the results obtained. Methods of multidimensional classification and screening are recommended for selection of optimization parameters and factors. Evolutionary operation representations are used at the optimization stage. Problems of optimization research should be tackled in centres of scientific information where data on advances made in various scientific fields are accumulated.
The Informetrics Research Group (CERESI/CNRS) was recently created by the Mission for Scientific and Technical Information and Communication of the CNRS. CERESI's goal is to study the impact of computer supported information exchanges on the social processes underlying the construction of scientific knowledge. A better understanding of this impact should help in designing and building scientific and technical information management systems. In this paper, we will focus on one aspect of our work: mapping science and technology in order to build dynamic representations of science and technology.