1,721,093 research outputs found
US Major Cities NDVI Summer Exposure Tracts 2000, 2010 and 2019
No full textNormalized difference vegetation index (NDVI) was derived from Landsat satellite imagery captured every 16 days at a 30 m resolution downloaded from Google Earth Engine (GEE) between April and September for each of the three distinct time points (2000, 2010, and 2019) at the census tract level for metropolitan statistical areas containing a city with >500,000 residents (n = 37). The temporal range from April to September was used to identify the overall maximum greenness of an area and to minimize the amount of tracts missing NDVI due to cloud cover. We selected images with the least amount of cloud cover during the time period and all tracts within the study area were assigned a mean NDVI value using GEE
Colonisation de l'arrière-pays: La migration Gibraltarienne en Andalousie
No full textLand or lack of it, has always been a key problem for Gibraltar and its inhabitants. Physically constrained by the Rock, and lacking any appreciable hinterland the people of British Gibraltar have always sought in nearby Spain, a place with space.Fil: Lane, Kevin John. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto de las Culturas. Universidad de Buenos Aires. Instituto de las Culturas; Argentin
Peru's ancient water systems can help protect communities from shortages caused by climate change
Full text linkWater is essential for human life, but in many parts of the world water supplies are under threat from more extreme, less predictable weather conditions due to climate change. Nowhere is this clearer than in the Peruvian Andes, where rising temperatures and receding glaciers forewarn of imminent water scarcity for the communities that live there.Throwing money and resources into engineering projects does not always guarantee success when trying to combat the effects of climate change and protect vulnerable communities. But the marriage of ancient and modern technologies offers promising solutions to the threat of water scarcity in Peru, and places like it all across the world.Fil: Conlon, Susan. University of Bristol; Reino UnidoFil: Lane, Kevin John. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Arqueología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Colonisation de l'arrière-pays: La migration Gibraltarienne en Andalousie
No full textFil: Lane, Kevin John. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad de Buenos Aires. Instituto de las Culturas; ArgentinaLand or lack of it, has always been a key problem for Gibraltar and its inhabitants. Physically constrained by the Rock, and lacking any appreciable hinterland the people of British Gibraltar have always sought in nearby Spain, a place with space.Lane, K. J. (2022). Colonisation de l'arrière-pays: La migration Gibraltarienne en Andalousie. En G. Ledegen, P. Fernández Sobrino y V. Thouroude (Eds.), L'Encyclopédie des migrants: Regards croisés sur un objet artistique, pp. 193-197. Francia: L'Harmattan
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Pounding the ground for the thunder god: Sounding platforms in the Prehispanic Andes (CE 1000–1532)
No full textFil: Lane, Kevin John. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad de Buenos Aires. Instituto de las Culturas; ArgentinaThe past is silent, or mostly so, yet sound can open a window to this same past. Early Spanish colonial ethnohistoric sources from the Andes are littered with references to indigenous dancing and music as an accompaniment to ritual and feasts. Recent archaeological research in the upper Ica Drainage on the late Prehispanic (CE 1000–1532) site of Viejo Sangayaico has revealed an open-air platform potentially prepared as a type of sprung or ‘sounding’ dancefloor which produces a deep percussion-like sound when stepped upon. I interpret this feature as a sounding platform for stomp dancing. The larger site’s association to veneration of Andean lightning and thunder deity suggests that dancing at this location might have been in part attuned to this supernatural entity. Wider ethnohistoric evidence provide a potential parallel into understanding what type of activities were practiced on this platform and site.Kevin L. J. (2023). Pounding the ground for the thunder god: Sounding platforms in the Prehispanic Andes (CE 1000–1532). Journal of Anthropological Archaeology, 71, 101515
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Engineering Resilience to Water Stress in the Late Prehispanic North-Central Andean Highlands (~600–1200 BP)
Full text linkThe Andes are defined by human struggles to provide for, and control, water. Nowhere is this challenge more apparent than in the unglaciated western mountain range Cordillera Negra of the Andes where rain runoff provides the only natural source of water for herding and farming economies. Based on over 20 years of systematic field surveys and taking a political ecology and resilience theory focus, this article evaluates how the Prehispanic North-Central highlands Huaylas ethnic group transformed the landscape of the Andes through the largescale construction of complex hydraulic engineering works in the Cordillera Negra of the Ancash Province, North-Central Peru. It is likely that construction of these engineered landscapes commenced during the Middle Horizon (AD 600–1000), reaching their apogee under the Late Intermediate Period (Huaylas group, AD 1000–1450) and Inca (AD 1450–1532) period, before falling into disuse during the early Spanish colony (AD 1532–1615) through a combination of disease, depopulation, and disruption. Persistent water stress in the western Pacific-facing Andean cordillera was ameliorated through the construction of interlinked dams and reservoirs controlling the water, soil, and wetlands. The modern study of these systems provides useful case-studies for infrastructure rehabilitation potentially providing low-cost, though technologically complex, solutions to modern water security.Fil: Lane, Kevin John. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto de las Culturas. Universidad de Buenos Aires. Instituto de las Culturas; Argentin
- …
