scholarly journals A Google Earth Database of Central American Volcanic Vents

2017 ◽  
Author(s):  
Michael J. Carr
Keyword(s):  
Central America ◽  
Research Funding ◽  
Cloud Forest ◽  
Google Earth ◽  
Central American ◽  
Annual Rainfall ◽  
High Quality ◽  
Time Pattern ◽  
Volcanic Deposits

Satellite imagery in Google Earth reveals 807 volcanic vents for Central America. Most of these have already been recognized. In fact, previous catalogs include many volcanoes that are not obvious in Google Earth and they are not included here. Furthermore, 47 large but deeply eroded volcanoes are not included because they appear very old. On the other hand, many young vents may be obscured in areas of low quality imagery or in areas of dense cloud forest. High quality Google Earth coverage keeps expanding so this catalog can be improved with time. Lidar imagery would greatly improve vent detection. A significant problem with any list of volcanic features is determining the appropriate cutoff age. Topographic expression is the only available criterion for estimating age for most of the vents and this criterion is highly flawed because of differences in volcanic deposits, weathering, annual rainfall and other factors. Ideally, 40Ar/39Ar ages would be available for most of the volcanoes and the revealed space-time pattern of volcanic activity would allow improved hazard estimates as well as a deeper understanding of the causes and controls of volcanism. Instead, the database is a necessary step toward: a) recognizing important volcanological problems that can attract geochronological research funding and b) encouraging a long-term campaign for determining the temporal development of Central American volcanism. The database is intended as a draft to be used and improved, not a fixed list.

UNICEF in Central America

1960 ◽  
Vol 329 (1) ◽  
pp. 69-77
Author(s):  
Alice C. Shaffer
Keyword(s):  
United Nations ◽  
Central America ◽  
International Organizations ◽  
Central American ◽  
The World ◽  
Working Together ◽  
Integrated Programs ◽  
Regional Basis ◽  
The United Nations

Central America has been one of the pioneer areas for the United Nations Children's Fund assisted pro grams. When the United Nations Children's Fund, under a broadened mandate from the United Nations, shifted the emphasis of its aid from emergency to long term and from war-torn countries to those economically less developed, Cen tral American governments immediately requested its assist ance to strengthen and extend services to children and mothers. As one of the first areas in the world to aim at the eradication of malaria and to have engaged in an inten sive campaign against malnutrition on a regional basis, the Central American experiences in these fields have become known, watched, and studied by people from many countries. Against this background, international and bilateral organi zations are working together with governments as they broaden the scope and the extent of their programs. Ten years of co-operative action have highlighted the need for train ing of personnel, both professional and auxiliary. This period has also made clear the value of more integrated programs with wider collaboration both within the ministries of government and between the international organizations.

scholarly journals An Analysis of Long-Term Rainfall Trends and Variability in the Uttarakhand Himalaya Using Google Earth Engine

2020 ◽  
Vol 12 (4) ◽  
pp. 709 ◽  
Author(s):  
Abhishek Banerjee ◽  
Ruishan Chen ◽  
Michael E. Meadows ◽  
R.B. Singh ◽  
Suraj Mal ◽  
...  
Keyword(s):  
River Basin ◽  
Temporal Trends ◽  
Google Earth ◽  
Monthly Rainfall ◽  
Annual Rainfall ◽  
Google Earth Engine ◽  
Spatio Temporal ◽  
Uttarakhand Himalaya ◽  
Rainy Days

This paper analyses the spatio-temporal trends and variability in annual, seasonal, and monthly rainfall with corresponding rainy days in Bhilangana river basin, Uttarakhand Himalaya, based on stations and two gridded products. Station-based monthly rainfall and rainy days data were obtained from the India Meteorological Department (IMD) for the period from 1983 to 2008 and applied, along with two daily rainfall gridded products to establish temporal changes and spatial associations in the study area. Due to the lack of more recent ground station rainfall measurements for the basin, gridded data were then used to establish monthly rainfall spatio-temporal trends for the period 2009 to 2018. The study shows all surface observatories in the catchment experienced an annual decreasing trend in rainfall over the 1983 to 2008 period, averaging 15.75 mm per decade. Analysis of at the monthly and seasonal trend showed reduced rainfall for August and during monsoon season as a whole (10.13 and 11.38 mm per decade, respectively); maximum changes were observed in both monsoon and winter months. Gridded rainfall data were obtained from the Climate Hazard Infrared Group Precipitation Station (CHIRPS) and Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks-Climate Data Record (PERSIANN-CDR). By combining the big data analytical potential of Google Earth Engine (GEE), we compare spatial patterns and temporal trends in observational and modelled precipitation and demonstrate that remote sensing products can reliably be used in inaccessible areas where observational data are scarce and/or temporally incomplete. CHIRPS reanalysis data indicate that there are in fact three significantly distinct annual rainfall periods in the basin, viz. phase 1: 1983 to 1997 (relatively high annual rainfall); phase 2: 1998 to 2008 (drought); phase 3: 2009 to 2018 (return to relatively high annual rainfall again). By comparison, PERSIANN-CDR data show reduced annual and winter precipitation, but no significant changes during the monsoon and pre-monsoon seasons from 1983 to 2008. The major conclusions of this study are that rainfall modelled using CHIRPS corresponds well with the observational record in confirming the decreased annual and seasonal rainfall, averaging 10.9 and 7.9 mm per decade respectively between 1983 and 2008, although there is a trend (albeit not statistically significant) to higher rainfall after the marked dry period between 1998 and 2008. Long-term variability in rainfall in the Bhilangana river basin has had critical impacts on the environment arising from water scarcity in this mountainous region.

Mothers’ socialisation goals and evaluations of desirable and undesirable everyday situations in two diverse cultural groups

2002 ◽  
Vol 26 (3) ◽  
pp. 248-258 ◽  
Author(s):  
Birgit Leyendecker ◽  
Michael E. Lamb ◽  
Robin L. Harwood ◽  
Axel Schölmerich
Keyword(s):  
United States ◽  
Central America ◽  
The United States ◽  
Central American ◽  
Cultural Groups ◽  
Cultural Constructs ◽  
Group Variation ◽  
Infant Behaviour

Long-term socialisation goals and evaluations of infant behaviour in a variety of everyday contexts were studied among 45 mothers who had immigrated from Central America to the United States, and 41 mothers from European American backgrounds. In accord with expectations based on broad cultural constructs, mothers from Central America emphasised long-term socialisation goals related to Proper Demeanour. In addition, when describing and evaluating everyday situations, they were likely to attribute the desirability or undesirability of these situations to the child's own appropriate and cooperative behaviour, and were likely to highlight mutual enjoyment when describing preferred play situations. In contrast, Euro-American mothers emphasised long-term socialisation goals related to Self-Maximisation, and when describing undesirable everyday situations, stressed the role of external factors not under the child's control, presumably to preserve the child's self-esteem. However, it was also found that the Central American mothers endorse selected aspects of individualism related to promoting their children's economic and personal potential in the United States. These findings point not only to the multidimensional nature of individualism, but also to the heterogeneity of beliefs among Latino populations. The importance of studying within-group variation with regard to the individualism/sociocentrism construct is highlighted.

Phylogeny and zoogeography of the New World terrestrial amphipods (landhoppers) (Crustacea: Amphipoda; Talitridae)

1991 ◽  
Vol 69 (4) ◽  
pp. 1104-1116 ◽  
Author(s):  
Dorothy Lindeman
Keyword(s):  
Phylogenetic Analysis ◽  
Salt Marsh ◽  
Central America ◽  
Short Distance ◽  
New World ◽  
Cloud Forest ◽  
Central American ◽  
The Caribbean ◽  
Wet Forests ◽  
Tectonic Movements

A phylogenetic analysis of the known New World tropical landhoppers (terrestrial amphipods) tests the hypothesis that the landhoppers of México, Jamaica, and Central America are derived monophyletically from local beach flea ancestors (of the Tethorchestia group). The results indicate that Cerrorchestia is derived directly from an ancestor of Chelorchestia, a palustral (salt marsh) taxon, and that Caribitroides shares an ancestor with Chelorchestia. The derivation of landhoppers from beach fleas is not supported. The zoogeography of New World landhoppers is explained by a combination of Caribbean tectonic movements and short-distance rafting dispersal. Caribitroides is believed to have evolved in México, with dispersal to Jamaica, as the Caribbean plate moved northeast past México. Cerrorchestia is believed to have evolved in Costa Rica – Panama as a relatively recent offshoot of the Chelorchestia group. Central American landhoppers are found almost exclusively in highland cloud forest and in the wet forests to the windward of these highlands, down to the minimum altitude at which sufficiently wet conditions are maintained.

scholarly journals Evaluating the bio-hydrological impact of a cloud forest in Central America using a semi-distributed water balance model

2013 ◽  
Vol 61 (1) ◽  
pp. 9-20b ◽  
Author(s):  
Luis A. Caballero ◽  
Zachary M. Easton ◽  
Brian K. Richards ◽  
Tammo S. Steenhuis
Keyword(s):  
Water Balance ◽  
Central America ◽  
Forest Cover ◽  
Cloud Forest ◽  
Water Balance Model ◽  
Population Pressure ◽  
Balance Model ◽  
Annual Rainfall ◽  
Management Decision ◽  
Model Parameters

Abstract Water scarcity poses a major threat to food security and human health in Central America and is increasingly recognized as a pressing regional issues caused primarily by deforestation and population pressure. Tools that can reliably simulate the major components of the water balance with the limited data available and needed to drive management decision and protect water supplies in this region. Four adjacent forested headwater catchments in La Tigra National Park, Honduras, ranging in size from 70 to 635 ha were instrumented and discharge measured over a one year period. A semi-distributed water balance model was developed to characterize the bio-hydrology of the four catchments, one of which is primarily cloud forest cover. The water balance model simulated daily stream discharges well, with Nash Sutcliffe model efficiency (E) values ranging from 0.67 to 0.90. Analysis of calibrated model parameters showed that despite all watersheds having similar geologic substrata, the bio-hydrological response the cloud forest indicated less plantavailable water in the root zone and greater groundwater recharge than the non cloud forest cover catchments. This resulted in watershed discharge on a per area basis four times greater from the cloud forest than the other watersheds despite only relatively minor differences in annual rainfall. These results highlight the importance of biological factors (cloud forests in this case) for sustained provision of clean, potable water, and the need to protect the cloud forest areas from destruction, particularly in the populated areas of Central America.

ANALYSIS OF ABDOMINAL TYPHOID INCIDENCE IN THE SOUTH REGION OF THE KYRGYZ REPUBLIC

2020 ◽  
pp. 43-48
Author(s):  
Zakirova J.S. ◽  
Nadirbekova R.A. ◽  
Zholdoshev S.T.
Keyword(s):  
Drinking Water ◽  
Typhoid Fever ◽  
Risk Groups ◽  
The Body ◽  
Kyrgyz Republic ◽  
Radiation Factor ◽  
High Quality ◽  
Two Generations ◽  
Immunological Deficiency

The article analyze the long-term morbidity, spread of typhoid fever in the southern regions of the Kyrgyz republic, and remains a permanent epidemic focus in the Jalal-Abad region, where against the low availability of the population to high-quality drinking water, an additional factor on the body for more than two generations and radiation factor, which we confirmed by the spread among the inhabitants of Mailuu-Suu of nosological forms of the syndrome of immunological deficiency, as a predictor of risk groups for infectious diseases, including typhoid fever.

Marginalization, Assimilation, and Resurgence: Indigenous People in Central America since Independence

2020 ◽  
Author(s):  
Wolfgang Gabbert
Keyword(s):  
Central America ◽  
Indigenous People ◽  
Cultural Difference ◽  
Indigenous Population ◽  
Active Role ◽  
Central American ◽  
Colonial Rule ◽  
Access To Education ◽  
Land Loss ◽  
Agricultural Export

While the end of colonial rule brought formal equality it did not end discrimination and marginalization of the indigenous population in independent Central America. Many suffered land loss and proletarianization in the emerging agricultural export economy. However, indigenous people were not mere victims of exploitation, displacement, and ladinization but played an often active role in Central American politics. Participation in the market economy and access to education fostered stratification within the indigenous population. The emergence of well-off and educated Indians and changes in international politics promoting multiculturalism contributed to the emergence of indigenous movements in recent decades. While some progress has been made concerning the recognition of cultural difference and autonomy, land rights are still a much disputed issue.

One-step synthesis of high-quality vanadium disulfide quantum dots for long-term lysosome-targetable imaging

2021 ◽  
pp. 130544
Author(s):  
Dan Yang ◽  
Liwen Chen ◽  
Le Wang ◽  
Zhongjie Cui ◽  
Zhuoqi Wen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Quality ◽  
One Step

scholarly journals Lyell, the Geikies and Croll's observations on terrestrial glacial sediments and landforms

2021 ◽  
pp. 1-14
Author(s):  
James ROSE
Keyword(s):  
Climate Change ◽  
High Quality ◽  
Glacial Sediments ◽  
Direct Observations ◽  
The Social ◽  
The Status ◽  
Social And Physical Environment ◽  
Glacial Landforms

ABSTRACT Within the context of the work and achievements of James Croll, this paper reviews the records of direct observations of glacial landforms and sediments made by Charles Lyell, Archibald and James Geikie and James Croll himself, in order to evaluate their contributions to the sciences of glacial geology and Quaternary environmental change. The paper outlines the social and physical environment of Croll's youth and contrasts this with the status and experiences of Lyell and the Geikies. It also outlines the character and role of the ‘Glasgow School’ of geologists, who stimulated Croll's interest into the causes of climate change and directed his focus to the glacial and ‘interglacial’ deposits of central Scotland. Contributions are outlined in chronological order, drawing attention to: (i) Lyell's high-quality observations and interpretations of glacial features in Glen Clova and Strathmore and his subsequent rejection of the glacial theory in favour of processes attributed to floating icebergs; (ii) the significant impact of Archibald Geikie's 1863 paper on the ‘glacial drift of Scotland’, which firmly established the land-ice theory; (iii) the fact that, despite James Croll's inherent dislike of geology and fieldwork, he provided high-quality descriptions and interpretations of the landforms and sediments of central Scotland in order to test his theory of climate change; and (iv) the great communication skills of James Geikie, enhanced by contacts and evidence from around the world. It is concluded that whilst direct observations of glacial landforms and sediments were critical to the long-term development of the study of glaciation, the acceptance of this theory was dependent also upon the skills, personality and status of the Geikies and Croll, who developed and promoted the concepts. Sadly, the subsequent rejection of the land-ice concept by Lyell resulted in the same factors challenging the acceptance of the glacial theory.

Exploring ethno-racial policy for the Garinagu in Central America: making the case for Black Indigeneity

2020 ◽  
pp. 117718012097900
Author(s):  
Sheryl Felecia Means
Keyword(s):  
Central America ◽  
Cultural Policy ◽  
Policy Making ◽  
Water Rights ◽  
Central American ◽  
Language Attrition ◽  
Political Autonomy ◽  
Collective Rights ◽  
Land And Water Rights ◽  
Racial Policy

Across the Central American region, several groups received political autonomy by the end of the 20th century. By granting autonomy to these groups, countries like Nicaragua acknowledged certain populations as members of distinct ethnic groups. This was not the case for every country or group in the region, and the lack of effective ethno-racial policy-making considerations across Central America has led to language attrition, loss of land and water rights, and commodification of historic communities. This article focuses on Honduras and Belize as unique sites of ethno-racial and socio-cultural policy making, group identity making and unmaking, and group rights for the Garinagu. Specifically, this work forwards a re-examination of national ethno-racial policy and a critical assessment of political models based on ethno-cultural collective rights intended to combat racial discrimination.

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