scholarly journals Patterns of Style, Diversity, and Similarity in Middle Orinoco Rock Art Assemblages

Arts ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 48 ◽  
Author(s):  
Philip Riris ◽  
José Oliver
Keyword(s):  
Spatial Distribution ◽  
Literature Review ◽  
South America ◽  
River Basin ◽  
Field Survey ◽  
Rock Art ◽  
Orinoco River

The area encompassed by the Orinoco river basin is home to some of the largest and most diverse rock art sites in lowland South America. In this paper, we aim to formally describe the spatial distribution and stylistic attributes of rock engravings and paintings on both banks of the Orinoco, centred on the Átures Rapids. Drawing on an exhaustive literature review and four years of field survey, we identify salient aspects of this corpus by investigating patterns of diversity and similarity. Based on a stylistic classification of Middle Orinoco rock art, this permits us to discuss potential links, as well as notable discontinuities, within the assemblage and possibly further afield. We consider the theoretical implications of our work for the study of pre-Columbian art and conclude with some suggestions for advances in methods for achieving the goal of deriving broader syntheses.

Chemical stratigraphy of the Paran� lavas (South America): classification of magma types and their spatial distribution

1992 ◽  
Vol 55 (1-2) ◽  
pp. 119-139 ◽  
Author(s):  
David W Peate ◽  
Chris J Hawkesworth ◽  
Marta S M Mantovani
Keyword(s):  
Spatial Distribution ◽  
South America

Results of Forest Fuel Spatial Distribution Mapping for Fire Simulation Purposes – Case Study

2014 ◽  
Vol 1001 ◽  
pp. 356-361 ◽  
Author(s):  
Andrea Majlingová ◽  
Maros Sedliak ◽  
Ján Tuček
Keyword(s):  
Spatial Distribution ◽  
Modeling And Simulation ◽  
Input Data ◽  
Field Survey ◽  
Volume Distribution ◽  
Forest Fuel ◽  
Spatial Analyst ◽  
Distribution Mapping

In the paper we introduce an approach of mapping of surface forest fuel spatial distribution using the results of field survey and functions and tools of the ArcGIS environment. The analysis was provided for the Stare Hory locality, which was affected by a forest fire in April 2011. For classification of the surface forest fuel we used the terrain curvature features. Totally we identified 4 basic classes of terrain morphology (ridges and valleys with a low and high curvature). For those classes we did the field survey oriented to the investigation of the forest fuel volume in t.ha-1. To quantify the surface forest fuel volume as precisely as possible we established 21 test plots in the field. Using the tools of Spatial Analyst in ArcGIS we produced the map of surface forest fuel volume distribution in the locality of Stare Hory. Results of such analyses are required as input data to the fire modeling and simulation processes in Farsite and FlamMap environments.

New records of Ephemeroptera from the Colombian Orinoco river basin of the Meta department

2017 ◽  
Vol 43 (2) ◽  
pp. 271
Author(s):  
Luis Gonzalo Salinas-Jiménez ◽  
José Ismael Rojas-Peña ◽  
Diana Paola Osorio-Ramírez ◽  
Clara Inés Caro-Caro
Keyword(s):  
River Basin ◽  
New Records ◽  
Andean Region ◽  
Orinoco River ◽  
First Time

There is extensive research of the Ephemeroptera communities taxonomy and ecology in the Andean region of Colombia. However, other regions such as the Orinoquia have been insufficiently studied. From this region, in the Meta department, four species have been registered: Varipes lasiobrachius Lugo-Ortiz & McCafferty, Coryphorus aquilus Peters, Miroculis (Atroari) colombiensis Savage & Peters and Tricorythopsis rondoniensis (Dias, Cruz & Ferreira). The main objective of this study is to report for the first time for this region the species: Mayobaetis ellenae (Mayo), Hydrosmylodon primanus (Eaton), Haplohyphes baritu Domínguez, Camelobaetidus edmundsi Dominique, Mathuriau & Thomas and Nanomis galera Lugo-Ortiz & McCafferty.

Revision of the Phyllachoraceae (Ascomycota) on hosts in the angiosperm family, Proteaceae

2001 ◽  
Vol 14 (2) ◽  
pp. 283 ◽  
Author(s):  
Ceridwen A. Pearce ◽  
Paul Reddell ◽  
Kevin D. Hyde
Keyword(s):  
Literature Review ◽  
South America ◽  
Herbarium Material

A literature review yielded seven Australian taxa within the Phyllachoraceae recorded from hosts in the angiosperm family Proteaceae, with three taxa from overseas. New collections and herbarium material were examined by using traditional microscopic characters. Seven new Australian taxa were identified. These include Phyllachora banksiae subsp. westaustraliensis on Banksia speciosa, Phyllachora tjapukiensis on Darlingia darlingiana, Phyllachora kylei on Dryandra spp., Phyllachora amplexicaulii on Hakea amplexicaulis, Phyllachora grevilleae subsp. clelandii on Hakea clavata and H. vittata, Phyllachora hakeicola subsp. cuttacuttae on Hakea arborescens and Phyllachora hakeicola subsp. tasmaniensis on Hakea lissosperma. We now recognise nine species, four subspecies and one variety within the Phyllachoraceae on Proteaceae in Australia, and Phyllachora rhopalina var. rhopalina and P. rhopalina var. macrospora from South America. In this paper, these taxa are described and illustrated by using interference contrast micrographs. A key to all known species of Phyllachoraceae on hosts in the Proteaceae is provided.

scholarly journals Mapping the spatial distribution of global 137Cs fallout in soils of South America as a baseline for Earth Science studies

2021 ◽  
Vol 214 ◽  
pp. 103542
Author(s):  
Pierre-Alexis Chaboche ◽  
Nicolas P.A. Saby ◽  
J. Patrick Laceby ◽  
Jean P.G. Minella ◽  
Tales Tiecher ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
South America ◽  
Science Studies ◽  
Earth Science ◽  
137Cs Fallout

The conservation of migratory fishes in the second largest river basin of South America depends on the creation of new protected areas

2021 ◽  
Author(s):  
Dayani Bailly ◽  
Valéria Flavia Batista‐Silva ◽  
Fernanda A. Silva Cassemiro ◽  
Priscila Lemes ◽  
Weferson Junio Graça ◽  
...  
Keyword(s):  
South America ◽  
Protected Areas ◽  
River Basin ◽  
The Creation ◽  
Migratory Fishes

scholarly journals Dry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Index

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 155
Author(s):  
Anita Drumond ◽  
Milica Stojanovic ◽  
Raquel Nieto ◽  
Luis Gimeno ◽  
Margarida L. R. Liberato ◽  
...  
Keyword(s):  
South America ◽  
Potential Evapotranspiration ◽  
Monthly Precipitation ◽  
Economic Activities ◽  
Central Brazil ◽  
Moisture Analysis ◽  
Dry Conditions ◽  
Wet Climate ◽  
Climate Events

A large part of the population and the economic activities of South America are located in eastern regions of the continent, where extreme climate events are a recurrent phenomenon. This study identifies and characterizes the dry and wet climate periods at domain-scale occurring over the eastern South America (ESA) during 1980–2018 through the multi-scalar Standardized Precipitation–Evapotranspiration Index (SPEI). For this study, the spatial extent of ESA was defined according to a Lagrangian approach for moisture analysis. It consists of the major continental sink of the moisture transported from the South Atlantic Ocean throughout the year, comprising the Amazonia, central Brazil, and the southeastern continental areas. The SPEI for 1, 3, 6, and 12 months of accumulation was calculated using monthly precipitation and potential evapotranspiration time series averaged on ESA. The analysis of the climate periods followed two different approaches: classification of the monthly SPEI values as mild, moderate, severe, and extreme; the computation of the events and their respective parameters (duration, severity, intensity, and peak). The results indicate that wet periods prevailed in the 1990s and 2000s, while dry conditions predominated in the 2010s, when the longest and more severe dry events have been identified at the four scales.

scholarly journals Artificial Intelligence, 3D Documentation, and Rock Art—Approaching and Reflecting on the Automation of Identification and Classification of Rock Art Images

2021 ◽  
Author(s):  
Christian Horn ◽  
Oscar Ivarsson ◽  
Cecilia Lindhé ◽  
Rich Potter ◽  
Ashely Green ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Bronze Age ◽  
Data Augmentation ◽  
Rock Art ◽  
Training Data ◽  
Future Research ◽  
Rock Surface ◽  
Southern Scandinavia ◽  
Bounding Boxes

AbstractRock art carvings, which are best described as petroglyphs, were produced by removing parts of the rock surface to create a negative relief. This tradition was particularly strong during the Nordic Bronze Age (1700–550 BC) in southern Scandinavia with over 20,000 boats and thousands of humans, animals, wagons, etc. This vivid and highly engaging material provides quantitative data of high potential to understand Bronze Age social structures and ideologies. The ability to provide the technically best possible documentation and to automate identification and classification of images would help to take full advantage of the research potential of petroglyphs in southern Scandinavia and elsewhere. We, therefore, attempted to train a model that locates and classifies image objects using faster region-based convolutional neural network (Faster-RCNN) based on data produced by a novel method to improve visualizing the content of 3D documentations. A newly created layer of 3D rock art documentation provides the best data currently available and has reduced inscribed bias compared to older methods. Several models were trained based on input images annotated with bounding boxes produced with different parameters to find the best solution. The data included 4305 individual images in 408 scans of rock art sites. To enhance the models and enrich the training data, we used data augmentation and transfer learning. The successful models perform exceptionally well on boats and circles, as well as with human figures and wheels. This work was an interdisciplinary undertaking which led to important reflections about archaeology, digital humanities, and artificial intelligence. The reflections and the success represented by the trained models open novel avenues for future research on rock art.

scholarly journals A CONTROL LIST FOR THE SYSTEMATIC IDENTIFICATION OF DISTURBANCE FACTORS

2021 ◽  
Vol 1 ◽  
pp. 51-60
Author(s):  
Peter Welzbacher ◽  
Gunnar Vorwerk-Handing ◽  
Eckhard Kirchner
Keyword(s):  
Literature Review ◽  
Product Development ◽  
Model Theory ◽  
Development Process ◽  
Product Development Process ◽  
Key Factors ◽  
Starting Point ◽  
Disturbance Factor ◽  
Systematic Identification

AbstractThe importance of considering disturbance factors in the product development process is often emphasized as one of the key factors to a functional and secure product. However, there is only a small number of tools to support the developer in the identification of disturbance factors and none of them yet ensures that the majority of occurring disturbance factors is considered. Thus, it is the aim of this contribution to provide a tool in form of a control list for the systematic identification of disturbance factors. At the beginning of this contribution, the terms “disturbance factor” and “uncertainty” are defined based on a literature review and different approaches for the classification of uncertainty are presented. Subsequently, the fundamentals of multipole based model theory are outlined. Moreover, a first approach in terms of a control list for a systematic identification of disturbance factors is discussed. Based on the discussed approach and taking the identified weaknesses as a starting point, a control list is presented that combines the existing basic concept of the control list with the fundamentals of multipole based model theory.

Sign in / Sign up

Export Citation Format

Share Document