scholarly journals Fine-grained, spatio-temporal datasets measuring 200 years of land development in the United States

Author(s):  
Johannes H. Uhl ◽  
Stefan Leyk ◽  
Caitlin M. McShane ◽  
Anna E. Braswell ◽  
Dylan S. Connor ◽  
...  

Abstract. The collection, processing and analysis of remote sensing data since the early 1970s has rapidly improved our understanding of change on the Earth’s surface. While satellite-based earth observation has proven to be of vast scientific value, these data are typically confined to recent decades of observation and often lack important thematic detail. Here, we advance in this arena by constructing new spatially-explicit settlement data for the United States that extend back to the early nineteenth century, and is consistently enumerated at fine spatial and temporal granularity (i.e., 250 m spatial, and 5 a temporal resolution). We create these time series using a large, novel building stock database to extract and map retrospective, fine-grained spatial distributions of built-up properties in the conterminous United States from 1810 to 2015. From our data extraction, we analyse and publish a series of gridded geospatial datasets that enable novel retrospective historical analysis of the built environment at unprecedented spatial and temporal resolution. The datasets are available at https://dataverse.harvard.edu/dataverse/hisdacus (Uhl and Leyk, 2020a, b, c, d).

2021 ◽  
Vol 13 (1) ◽  
pp. 119-153
Author(s):  
Johannes H. Uhl ◽  
Stefan Leyk ◽  
Caitlin M. McShane ◽  
Anna E. Braswell ◽  
Dylan S. Connor ◽  
...  

Abstract. The collection, processing, and analysis of remote sensing data since the early 1970s has rapidly improved our understanding of change on the Earth's surface. While satellite-based Earth observation has proven to be of vast scientific value, these data are typically confined to recent decades of observation and often lack important thematic detail. Here, we advance in this arena by constructing new spatially explicit settlement data for the United States that extend back to the early 19th century and are consistently enumerated at fine spatial and temporal granularity (i.e. 250 m spatial and 5-year temporal resolution). We create these time series using a large, novel building-stock database to extract and map retrospective, fine-grained spatial distributions of built-up properties in the conterminous United States from 1810 to 2015. From our data extraction, we analyse and publish a series of gridded geospatial datasets that enable novel retrospective historical analysis of the built environment at an unprecedented spatial and temporal resolution. The datasets are part of the Historical Settlement Data Compilation for the United States (https://dataverse.harvard.edu/dataverse/hisdacus, last access: 25 January 2021) and are available at https://doi.org/10.7910/DVN/YSWMDR (Uhl and Leyk, 2020a), https://doi.org/10.7910/DVN/SJ213V (Uhl and Leyk, 2020b), and https://doi.org/10.7910/DVN/J6CYUJ (Uhl and Leyk, 2020c).


1989 ◽  
Vol 16 (2) ◽  
pp. 119-153 ◽  
Author(s):  
Sarah Auman Reed

This paper examines the magnitude of the reporting bias inherent in the historical cost accounting of a firm's physical capital. Reported depreciation data pertaining to U.S. Steel Corporation (currently USX) between 1939 and 1987 are compared with standardized historical cost figures and replacement cost estimates. The findings suggest that replacement cost depreciation would have provided more information about U.S. Steel's ability to maintain its productive capacity than historical cost depreciation did. Thus, this analysis provides an illustration of one of the primary arguments for replacement cost accounting.


2010 ◽  
Vol 34 (2) ◽  
pp. 113-128
Author(s):  
Michael E. Harkin

This article examines the first decades of the field of ethnohistory as it developed in the United States. It participated in the general rapprochement between history and anthropology of mid-twentieth-century social science. However, unlike parallel developments in Europe and in other research areas, ethnohistory specifically arose out of the study of American Indian communities in the era of the Indian Claims Commission. Thus ethnohistory developed from a pragmatic rather than a theoretical orientation, with practitioners testifying both in favor of and against claims. Methodology was flexible, with both documentary sources and ethnographic methods employed to the degree that each was feasible. One way that ethnohistory was innovative was the degree to which women played prominent roles in its development. By the end of the first decade, the field was becoming broader and more willing to engage both theoretical and ethical issues raised by the foundational work. In particular, the geographic scope began to reach well beyond North America, especially to Latin America, where archival resources and the opportunities for ethnographic research were plentiful, but also to areas such as Melanesia, where recent European contact allowed researchers to observe the early postcontact period directly and to address the associated theoretical questions with greater authority. Ethnohistory is thus an important example of a field of study that grew organically without an overarching figure or conscious plan but that nevertheless came to engage central issues in cultural and historical analysis.


2020 ◽  
Vol 52 ◽  
pp. 127-146
Author(s):  
KRISTINA F. NIELSEN

Abstract (Spanish/English)Forjando el Aztecanismo: Nacionalismo Musical Mexicano del Siglo XX en el siglo XXI en Los ÁngelesHoy en día, un creciente número de músicos mexico-americanos en los Estados Unidos tocan instrumentos indígenas mesoamericanos y réplicas arqueológicas, lo que se conoce como “Música Azteca.” En este artículo, doy a conocer cómo los músicos contemporáneos de Los Ángeles, California, recurren a los legados de la investigación musical nacionalista mexicana e integran modelos antropológicos y arqueológicos aplicados. Al combinar el trabajo de campo etnográfico con el análisis histórico, sugiero que los marcos musicales y culturales que alguna vez sirvieron para unir al México pos-revolucionario han adquirido una nuevo significado para contrarrestar la desaparición del legado indígena mexicano en los Estados Unidos.Today a growing number of Mexican-American musicians in the United States perform on Indigenous Mesoamerican instruments and archaeological replicas in what is widely referred to as “Aztec music.” In this article, I explore how contemporary musicians in Los Angeles, California, draw on legacies of Mexican nationalist music research and integrate applied anthropological and archeological models. Pairing ethnographic fieldwork with historical analysis, I suggest that musical and cultural frameworks that once served to unite post-revolutionary Mexico have gained new significance in countering Mexican Indigenous erasure in the United States.


1986 ◽  
Vol 38 (4) ◽  
pp. 626-645 ◽  
Author(s):  
Gene M. Lyons

Aside from language, students of international relations in the United States and Great Britain have several things in common: parallel developments in the emergence of international relations as a field of study after World War I, and more recent efforts to broaden the field by drawing security issues and changes in the international political economy under the broad umbrella of “international studies.” But a review of four recent books edited by British scholars demonstrates that there is also a “distance” between British and American scholarship. Compared with dominant trends in the United States, the former, though hardly monolithic and producing a rich and varied literature, is still very much attached to historical analysis and the concept of an “international society” that derives from the period in modern history in which Britain played a more prominent role in international politics. Because trends in scholarship do, in fact, reflect national political experience, the need continues for transnational cooperation among scholars in the quest for strong theories in international relations.


2021 ◽  
Author(s):  
◽  
Jane Marie Niemeyer

A historical analysis of precipitation using 72 years of data from Midwest stations focuses on the implications of climate change for agricultural interests. The number of precipitation events, consecutive days of precipitation, and a Fourier transformation on precipitation are included. Although increased precipitation can be of benefit in agricultural production resulting in yield benefits in the Midwest, excessive rainfall events lead to runoff, which does not improve soil water content and plant available water. To examine the beneficial nature of rainfall events in the Midwest, rainfall retention is estimated using the United States Department of Agriculture Soil Conservation Service (USDA-NRCS/SCS) method. This method can be described briefly as an empirical formula estimating the soil's ability to store water and the amount of runoff. It was found that not only has rainfall increased but so have the number of rainfall days and the number of consecutive days of rainfall. To appricultural focus, spring and fall rainfall days were also found to increase implying that farmers may have fewer days to complete fieldwork in the current climate. With increasing precipitation, the potential for runoff also increases, losing valuable water needed for crops and contributing to lost nutrients in the soil.


2019 ◽  
Author(s):  
Chris Kenyon ◽  
Jolein Laumen ◽  
Dorien Van Den Bossche ◽  
Christophe Van Dijck

Abstract Background Does the emergence of antimicrobial resistance in Neisseria gonorrhoeae include the erasure of highly susceptible strains or does it merely involve a stretching of the MIC distribution? If it was the former this would be important to know as it would increase the probability that the loss of susceptibility is irreversible.Methods We conducted a historical analysis based on a literature review of changes of N. gonorrhoeae MIC distribution over the past 75 years for 3 antimicrobials (benzylpenicillin, ceftriaxone and azithromycin) in five countries (Denmark, Japan, South Africa, the United Kingdom and the United States).Results Changes in MIC distribution were most marked for benzylpenicillin and showed evidence of a right shifting of MIC distribution that was associated with a reduction/elimination of susceptible strains in all countries. In the case of ceftriaxone and azithromycin, where only more recent data was available, right shifting was also found in all countries but the extent of right shifting varied and the evidence for the elimination of susceptible strains was more mixed.Conclusions The finding of right shifting of MIC distribution combined with reduction/elimination of susceptible strains is concerning since it suggests that this shifting may not be reversible. Since excess antimicrobial consumption is likely to be responsible for this right shifting, this insight provides additional impetus to promote antimicrobial stewardship.


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