scholarly journals New information on the restoration-construction works at the site of rock art Tomskaya Pisanitsa in the late 1960s – mid-1970s

2018 ◽  
Author(s):  
Konstantin Kononchuk ◽  
◽  
Anna  Pokrovskaya ◽  
Keyword(s):  
Rock Art ◽  
New Information ◽  
Construction Works

scholarly journals El abrigo de Melgar : nuevas apreciaciones cronológicas sobre las pinturas esquemáticas del núcleo de Quesada (Jaén)

1999 ◽  
Author(s):  
Manuel Gabriel López Payer ◽  
Miguel Soria Lerma
Keyword(s):  
Iberian Peninsula ◽  
Rock Art ◽  
Mountain Range ◽  
Copper Age ◽  
Rock Shelter ◽  
New Information ◽  
Península Ibérica

En este artículo se presenta el Abrigo del Melgar (Sierra de Quesada), el cual contiene una serie de pinturas que aportan nuevos datos con relación a la cronología y el significado del arte rupestre esquemático del Sudeste de la Península Ibérica. Se sitúa la realización de estas representaciones en la Edad del Cobre, y se intenta precisar la cronología de la estación dentro del núcleo de Quesada.This article concerns the Melgar rock shelter (Quesada Mountain Range), which contains a series oí paintings that provides new Information about the chronology and meaning of schematic rock art in the Southeast of the Iberian Península. The achievement of these pictures it's dated in the Copper Age, and the chronology of the station has been tried to fix within the Quesada group.

A Quantitative Analysis of Superimpositions in the Rock Art of the Coso Range, California

1979 ◽  
Vol 44 (3) ◽  
pp. 546-556 ◽  
Author(s):  
Klaus F. Wellmann
Keyword(s):  
Quantitative Analysis ◽  
Rock Art ◽  
New Information ◽  
Subject Categories ◽  
High Incidence ◽  
Visual Support ◽  
Design Motifs ◽  
Game Animals

All superimpositions encountered in a sample of 106 panels of proto-Shoshonean petroglyphs in the Coso Range (T22S-R40E). California, were quantitatively analyzed. The relative numbers of superimpositions in three of the nine subject categories (patterned-body anthropomorphs, other humans, and boat-shaped sheep) were higher than expected. Some designs (other humans, boat-shaped sheep, medicine bags) formed the overlying elements significantly more often, and others (patterned-body anthropomorphs, other elements) were seen more frequently as underlying subjects. Boat-shaped sheep and patterned-body humans constituted the most commonly encountered pairs of motifs linked in superimpositions; the high incidence of this particular linkage provides visual support for the postulated occurrence of a late intensification of ritual activities designed to help increase the supply of game animals. The data also contribute some new information about the possible iconographic roles of two controversial design motifs, the “shields” and the “medicine bags.”

Drawing Upon the Past: Temporal Ontology and Mythological Ideology in South-central Californian Rock Art

2013 ◽  
Vol 23 (3) ◽  
pp. 373-394 ◽  
Author(s):  
David W. Robinson
Keyword(s):  
Rock Art ◽  
Narrative Structure ◽  
Relational Ontology ◽  
Central California ◽  
Temporal Ontology ◽  
The Past ◽  
South Central ◽  
New Information ◽  
Indigenous Society

The increasing influence of New Animism is providing useful ways of interpreting rock art as well as ways to move beyond generalizing models based upon Cartesian principles. However, the increasing attention to animism runs the risk of simply replacing one generalization with another. To avoid the pitfalls of generalization, this article sets out to explore the ways in which relational ontology may have been communicated throughout indigenous society in a specific case study from south-central California. To do this requires adopting a ‘third space’ approach (Porr & Bell 2011) to detail the didactic and pedagogical narrative roles of rock art and mythology in south-central California. Paraphrasing Bird-David (2006), the goal is to understand how an animistic epistemology is enacted into an institutionalized way of knowing. To do this, I look closely at new information on rock-art chronology in conjunction with mythological narratives. It is suggested that the vibrant pictographs of the region drew upon ontological notions of the past embodied at specific places in the landscape and that the narrative structure of myth helps inform our understanding of the narrative structure of rock-art composition. This provides an appreciation of indigenous perceptions of time, which in turn shows that mythology was a template for human institutions while explaining rock art as another ontological institution that was part-and-parcel of relational ideologies associated with ‘delayed-return’ complex societies of south-central California.

scholarly journals On the Methodology of Studying Palimpsests in Rock Art: The Case of the Shalabolino Rock Art Site, Krasnoyarsk Territory

2019 ◽  
Vol 47 (2) ◽  
pp. 93-102
Author(s):  
L. V. Zotkina
Keyword(s):  
High Resolution ◽  
Rock Art ◽  
Three Dimensional ◽  
Macro Level ◽  
New Approach ◽  
Relative Chronology ◽  
New Information ◽  
Minusinsk Basin

This paper addresses the main problems in assessing the stratigraphy of superimpositions in rock art. When a petroglyph is overlain by one or several others, this may provide important information not only about single images but also about entire stylistic traditions. Existing methods used for evaluating the relative chronology of the parts of petroglyphic palimpsests are discussed, and a new approach is proposed, combining high-resolution three-dimensional visualization at the macro-level with traceological analysis. We focus on the characteristics of the pecked surface in the area outside the palimpsest and that in the overlap zone. The comparison of these parts makes it possible to reveal the traceologically informative features in the palimpsest areas, indicating the sequence of superimposed petroglyphs. This approach is instantiated by the analysis of one of the palimpsests in the Shalabolino rock gallery, the Krasnoyarsk Territory. Images representing various stylistic traditions are found in complicated stratigraphic relations. The sequence of three main fi gures (bear, bull, and elk) in this multilayered composition has been reconstructed. The results of the analysis cannot be used as an argument for attributing these petroglyphs to vastly different chronological periods. Rather, they provide new information relevant to the debate around the age of the Angara and Minusinsk petroglyphic styles in the Minusinsk Basin.

Lattice Imaging of Twin, Lath and α/Martensite Boundaries in Duplex Low Carbon Steels

1977 ◽  
Vol 35 ◽  
pp. 118-119
Author(s):  
J. Y. Koo ◽  
G. Thomas
Keyword(s):  
High Resolution Electron Microscopy ◽  
Ferrite Matrix ◽  
Carbon Steels ◽  
Bright Field Image ◽  
Low Carbon ◽  
Lattice Imaging ◽  
Bright Field ◽  
Lattice Image ◽  
New Information ◽  
Resolution Electron

High resolution electron microscopy has been shown to give new information on defects(1) and phase transformations in solids (2,3). In a continuing program of lattice fringe imaging of alloys, we have applied this technique to the martensitic transformation in steels in order to characterize the atomic environments near twin, lath and αmartensite boundaries. This paper describes current progress in this program.Figures A and B show lattice image and conventional bright field image of the same area of a duplex Fe/2Si/0.1C steel described elsewhere(4). The microstructure consists of internally twinned martensite (M) embedded in a ferrite matrix (F). Use of the 2-beam tilted illumination technique incorporating a twin reflection produced {110} fringes across the microtwins.

Stereo Electron Microscopy Applied to High Resolution Freeze-Etch Replicas

1970 ◽  
Vol 28 ◽  
pp. 306-307
Author(s):  
L. Andrew Staehelin
Keyword(s):  
Electron Microscopy ◽  
Plastic Deformation ◽  
High Resolution ◽  
Smooth Surfaces ◽  
Small Particles ◽  
Membrane Surfaces ◽  
Wide Acceptance ◽  
New Information ◽  
Number Of Particles ◽  
Small Holes

Freeze-etched membranes usually appear as relatively smooth surfaces covered with numerous small particles and a few small holes (Fig. 1). In 1966 Branton (1“) suggested that these surfaces represent split inner mem¬brane faces and not true external membrane surfaces. His theory has now gained wide acceptance partly due to new information obtained from double replicas of freeze-cleaved specimens (2,3) and from freeze-etch experi¬ments with surface labeled membranes (4). While theses studies have fur¬ther substantiated the basic idea of membrane splitting and have shown clearly which membrane faces are complementary to each other, they have left the question open, why the replicated membrane faces usually exhibit con¬siderably fewer holes than particles. According to Branton's theory the number of holes should on the average equal the number of particles. The absence of these holes can be explained in either of two ways: a) it is possible that no holes are formed during the cleaving process e.g. due to plastic deformation (5); b) holes may arise during the cleaving process but remain undetected because of inadequate replication and microscope techniques.

Trial production of γ-type energy filtering TEM

1995 ◽  
Vol 53 ◽  
pp. 604-605
Author(s):  
Y. Taniguchi ◽  
E. Nakazawa ◽  
S. Taya
Keyword(s):  
Magnetic Energy ◽  
Electron Optics ◽  
Electron Microscopic ◽  
Mass Spectrometers ◽  
Ion Optics ◽  
Energy Filtering ◽  
New Information ◽  
New Type ◽  
Fringing Fields

Imaging energy filters can add new information to electron microscopic images with respect to energy-axis, so-called electron spectroscopic imaging (ESI). Recently, many good results have been reported using this imaging technique. ESI also allows high-contrast observation of unstained biological samples, becoming a trend of the field of morphology. We manufactured a new type of energy filter as a trial production. This energy filter consists of two magnets, and we call γ-filter since the trajectory of electrons shows ‘γ’-shape inside the filter. We evaluated the new energyγ-filter TEM with the γ-filter.Figure 1 shows schematic view of the electron optics of the γ-type energy filter. For the determination of the electron-optics of the γ-type energy filter, we used the TRIO (Third Order Ion Optics) program which has been developed for the design of high resolution mass spectrometers. The TRIO takes the extended fringing fields (EFF) into consideration. EFF makes it difficult to design magnetic energy filters with magnetic sector fields.

Principles of Low-Vacuum SEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1304-1305
Author(s):  
Klaus-Ruediger Peters
Keyword(s):  
New Technologies ◽  
High Vacuum ◽  
Optical Microscope ◽  
Specimen Surface ◽  
Electrical Field ◽  
Gaseous Environment ◽  
New Information ◽  
Gas Molecules ◽  
New Interactions ◽  
Gas Pressures

Only recently it became possible to expand scanning electron microscopy to low vacuum and atmospheric pressure through the introduction of several new technologies. In principle, only the specimen is provided with a controlled gaseous environment while the optical microscope column is kept at high vacuum. In the specimen chamber, the gas can generate new interactions with i) the probe electrons, ii) the specimen surface, and iii) the specimen-specific signal electrons. The results of these interactions yield new information about specimen surfaces not accessible to conventional high vacuum SEM. Several microscope types are available differing from each other by the maximum available gas pressure and the types of signals which can be used for investigation of specimen properties.Electrical non-conductors can be easily imaged despite charge accumulations at and beneath their surface. At high gas pressures between 10-2 and 2 torr, gas molecules are ionized in the electrical field between the specimen surface and the surrounding microscope parts through signal electrons and, to a certain extent, probe electrons. The gas provides a stable ion flux for a surface charge equalization if sufficient gas ions are provided.

Modern TEM systems architecture

1986 ◽  
Vol 44 ◽  
pp. 602-605
Author(s):  
U. Gross ◽  
P. Hagemann
Keyword(s):  
Electron Microscope ◽  
Information Gathering ◽  
Systems Architecture ◽  
Control Functions ◽  
Transmission Electron ◽  
New Information ◽  
Comprehensive Information ◽  
Scanning Transmission ◽  
Diffraction Patterns ◽  
Analytical Equipment

By addition of analytical equipment, scanning transmission accessories and data processing equipment the basic transmission electron microscope (TEM) has evolved into a comprehensive information gathering system. This extension has led to increased complexity of the instrument as compared with the straightforward imaging microscope, since in general new information capacity has required the addition of new control hardware. The increased operational complexity is reflected in a proliferation of knobs and buttons.In the conventional electron microscope design the operating panel of the instrument has distinct control elements to alter optical conditions of the microscope column in different modes. As a consequence a multiplicity of control functions has been inevitable. Examples of this are the three pairs of focus and magnification controls needed for TEM imaging, diffraction patterns, and STEM images.

X-ray microprobe for materials science

1994 ◽  
Vol 52 ◽  
pp. 56-57
Author(s):  
G.E. Ice
Keyword(s):  
Crystallographic Orientation ◽  
Local Structure ◽  
Materials Science ◽  
Chemical Information ◽  
X Ray Diffraction ◽  
Ray Optics ◽  
X Ray ◽  
Novel Materials ◽  
New Information ◽  
Elemental Sensitivity

The increasing availability of synchrotron x-ray sources has stimulated the development of advanced hard x-ray (E≥5 keV) microprobes. With new x-ray optics these microprobes can achieve micron and submicron spatial resolutions. The inherent elemental and crystallographic sensitivity of an x-ray microprobe and its inherently nondestructive and penetrating nature will have important applications to materials science. For example, x-ray fluorescent microanalysis of materials can reveal elemental distributions with greater sensitivity than alternative nondestructive probes. In materials, segregation and nonuniform distributions are the rule rather than the exception. Common interfaces to whichsegregation occurs are surfaces, grain and precipitate boundaries, dislocations, and surfaces formed by defects such as vacancy and interstitial configurations. In addition to chemical information, an x-ray diffraction microprobe can reveal the local structure of a material by detecting its phase, crystallographic orientation and strain.Demonstration experiments have already exploited the penetrating nature of an x-ray microprobe and its inherent elemental sensitivity to provide new information about elemental distributions in novel materials.

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