scholarly journals Spatial and multi-temporal analysis of deforestation and quantification of the remnant forests on Porto Rico Island, Paraná, Brazil

1999 ◽  
Vol 42 (1) ◽  
Author(s):  
João Batista Campos
Keyword(s):  
Social Transformation ◽  
Forest Cover ◽  
Temporal Analysis ◽  
The State ◽  
Aerial Photographs ◽  
Conservation Units ◽  
Land Occupation ◽  
Serra Do Mar ◽  
Multi Temporal ◽  
Colonization Process

The process of land occupation by the state of Paraná practically decimated its forests. Presently, only 7% from a total area of 83.41% is covered by forests. Most of them are now concentrated in the "Serra do Mar" and in the Iguaçu National Park. With regard to forest cover the most critical region is situated in the northwestern of the state with less than 1% of its area covered by forest. This restricted area mainly consists of conservation units and the islands of the high Paraná River floodplain. The present study consists of a spatial and multi-temporal analysis of deforestation and the quantification of the remnant forests on Porto Rico island (22º45'S; 53º15'W), which have their occupation history linked to the colonization process of the region. Historical aerial photographs of this region were used and the relationship of deforestation with the process of colonization and social transformation of the region is discussed.

scholarly journals MULTI-TEMPORAL ANALYSIS OF WWII RECONNAISSANCE PHOTOS

2016 ◽  
Vol XLI-B8 ◽  
pp. 973-978
Author(s):  
P. Meixner ◽  
M. Eckstein
Keyword(s):  
Czech Republic ◽  
Temporal Analysis ◽  
Aerial Photographs ◽  
Adjacent Area ◽  
Unexploded Ordnance ◽  
Aerial Photo ◽  
Multi Temporal ◽  
Occupied Territories ◽  
The Impact ◽  
Open Cast

There are millions of aerial photographs from the period of the Second Wold War available in the Allied archives, obtained by aerial photo reconnaissance, covering most of today’s European countries. They are spanning the time from 1938 until the end of the war and even beyond. Photo reconnaissance provided intelligence information for the Allied headquarters and accompanied the bombing offensive against the German homeland and the occupied territories. <br><br> One of the initial principal targets in Bohemia were the synthetized fuel works STW AG (Sudetenländische Treibstoffwerke AG) in Zaluzi (formerly Maltheuren) near Most (formerly Brück), Czech Republic. The STW AG synthetized fuel plant was not only subject to bombing raids, but a subject to quite intensive photo reconnaissance, too - long before the start of the bombing campaign. With a multi-temporal analysis of the available imagery from international archives we will demonstrate the factory build-up during 1942 and 1943, the effects of the bombing raids in 1944 and the struggle to keep the plant working in the last year of the war. Furthermore we would like to show the impact the bombings have today, in form of potential unexploded ordnance in the adjacent area of the open cast mines.

scholarly journals Morphological Changes Detection of a Large Earthflow Using Archived Images, LiDAR-Derived DTM, and UAV-Based Remote Sensing

2020 ◽  
Vol 13 (1) ◽  
pp. 120
Author(s):  
Massimo Conforti ◽  
Michele Mercuri ◽  
Luigi Borrelli
Keyword(s):  
Morphological Changes ◽  
Source Area ◽  
Temporal Analysis ◽  
Earth Satellite ◽  
Google Earth ◽  
Aerial Photographs ◽  
Temporal Data ◽  
Transport Zone ◽  
Multi Temporal ◽  
System Data

In mountainous landscapes, where strongly deformed pelitic sediments outcrop, earthflows can dominate denudation processes and landscape evolution. This paper investigated geological and geomorphological features and space-time evolution over a 65-year time span (1954–2019) of a large earthflow, representative of wide sectors of the Apennine chain of southern Italy. The landslide, with a maximum length of 1.85 × 103 m, affects an area of 4.21 × 105 m2 and exhibits two source zones: a narrow and elongated transport zone and a lobate accumulation zone. Spatial and temporal morphological changes of the earthflow were assessed, comparing multi-source and multi-temporal data (aerial photographs, Google Earth satellite images, Light Detection and Ranging (LiDAR) and Unmanned Aerial Vehicles (UAV) system data). Geomorphic changes, quantified using Digital Terrain Models (DTMs) of differences, highlighted an extensive lowering of the topographic surface in the source area and a significant uplift at the landslide toe. Moreover, the multi-temporal analysis showed a high increase of landslide surface (more than 66%) during the last 65 years. The volumetric analyses showed that different sectors of the earthflow were active at different times, with different rates of topographic change. Overall, the used approach highlighted the great potentiality of the integration of multi-source and multi-temporal data for the diachronic reconstruction of morphological landslide evolution.

scholarly journals MULTI-TEMPORAL ANALYSIS OF WWII RECONNAISSANCE PHOTOS

2016 ◽  
Vol XLI-B8 ◽  
pp. 973-978 ◽  
Author(s):  
P. Meixner ◽  
M. Eckstein
Keyword(s):  
Czech Republic ◽  
Temporal Analysis ◽  
Aerial Photographs ◽  
Adjacent Area ◽  
Unexploded Ordnance ◽  
Aerial Photo ◽  
Multi Temporal ◽  
Occupied Territories ◽  
The Impact ◽  
Open Cast

There are millions of aerial photographs from the period of the Second Wold War available in the Allied archives, obtained by aerial photo reconnaissance, covering most of today’s European countries. They are spanning the time from 1938 until the end of the war and even beyond. Photo reconnaissance provided intelligence information for the Allied headquarters and accompanied the bombing offensive against the German homeland and the occupied territories. &lt;br&gt;&lt;br&gt; One of the initial principal targets in Bohemia were the synthetized fuel works STW AG (Sudetenländische Treibstoffwerke AG) in Zaluzi (formerly Maltheuren) near Most (formerly Brück), Czech Republic. The STW AG synthetized fuel plant was not only subject to bombing raids, but a subject to quite intensive photo reconnaissance, too - long before the start of the bombing campaign. With a multi-temporal analysis of the available imagery from international archives we will demonstrate the factory build-up during 1942 and 1943, the effects of the bombing raids in 1944 and the struggle to keep the plant working in the last year of the war. Furthermore we would like to show the impact the bombings have today, in form of potential unexploded ordnance in the adjacent area of the open cast mines.

scholarly journals Análise multitemporal do uso do solo da microbacia do Rio Sarandi no Sudoeste do estado do Paraná, Brasil utilizando imagens LANDSAT/TM

2018 ◽  
Vol 40 ◽  
pp. 43
Author(s):  
Clóvis Cechim Júnior ◽  
Mara Rubia Silva
Keyword(s):  
Land Use ◽  
Forest Cover ◽  
Temporal Analysis ◽  
Landsat Tm ◽  
Spectral Information ◽  
Southern Brazil ◽  
Family Farms ◽  
Enhancement Technique ◽  
Agricultural Potential ◽  
Multi Temporal

The evaluation of the changes a particular location undergoes over several years may be carried out with the analysis of images in different periods of time. The objective of this study was to carry out the multi-temporal analysis of the land use on the Sarandi River watershed that has predominance of family farms and high agricultural potential and is located in the Southwest mesoregion of the state of Paraná, Southern Brazil. To verify the changes of land use in the basin was necessary to apply the linear image enhancement technique to improve spectral information and facilitate images interpretation. The classification method used was supervised as the Bhattacharya classifier, on LANDSAT/TM satellite’s images, from 1985 to 2010. The data were processed by SPRING and the results showed along these 25 years a 0.40% decline in forest cover, with decrease in grazing areas in a ratio of 4.21% and around 6.64% for exposed soil and a increase of 10.52% in agriculture, 0.62% in urban area and 0.11% in water blade. The evaluation of the accuracy of the mappings generated was made using as reference the images LANDSA/TM, IK ranged between (97.2 98.7%) and EG medium was 98% which indicates the efficiency of the classifier.

Influence of Forest Cover on the State of the Ground Water Table

1953 ◽  
Vol 17 (1) ◽  
pp. 65-67 ◽  
Author(s):  
S. A. Wilde ◽  
E. C. Steinbrenner ◽  
R. S. Pierce ◽  
R. C. Dosen ◽  
D. T. Pronin
Keyword(s):  
Ground Water ◽  
Water Table ◽  
Forest Cover ◽  
The State ◽  
Ground Water Table

scholarly journals Crustacea, Isopoda, Oniscidea Latreille, 1802: new continent record and distribution extension in Brazil

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 217 ◽  
Author(s):  
Mariana Juventina Magrini ◽  
Paula Beatriz Araujo ◽  
Marcio Uehara-Prado
Keyword(s):  
Rio Grande ◽  
Sao Paulo ◽  
The State ◽  
Southeastern Brazil ◽  
Pitfall Traps ◽  
São Paulo ◽  
Undescribed Species ◽  
Rio Grande Do Sul ◽  
Serra Do Mar ◽  
First Time

Terrestrial Isopods were sampled in four protected Atlantic Forest areas located in Serra do Mar, state of São Paulo, southeastern Brazil. A total of 2,217 individuals of six species (Atlantoscia sp., Benthana werneri, Pseudodiploexochus tabularis, Pudeoniscus obscurus, Styloniscus spinosus and Trichorhina sp.) were captured in pitfall traps. The exotic species S. spinosus is recorded for the first time for the Americas. Another introduced species, P. tabularis, previously recorded only from the state of Rio Grande do Sul, had its geographic distribution extended to the state of São Paulo. The most abundant isopods in this study belong to an undescribed species of Atlantoscia.

scholarly journals Users roles identification on online crowdsourced Q&A platforms and encyclopedias: a survey

2021 ◽  
Author(s):  
Akrati Saxena ◽  
Harita Reddy
Keyword(s):  
Network Analysis ◽  
Knowledge Sharing ◽  
Informal Learning ◽  
Social Roles ◽  
Online Discussion ◽  
State Of The Art ◽  
Temporal Analysis ◽  
The State ◽  
Open Research ◽  
Research Questions

AbstractOnline informal learning and knowledge-sharing platforms, such as Stack Exchange, Reddit, and Wikipedia have been a great source of learning. Millions of people access these websites to ask questions, answer the questions, view answers, or check facts. However, one interesting question that has always attracted the researchers is if all the users share equally on these portals, and if not then how the contribution varies across users, and how it is distributed? Do different users focus on different kinds of activities and play specific roles? In this work, we present a survey of users’ social roles that have been identified on online discussion and Q&A platforms including Usenet newsgroups, Reddit, Stack Exchange, and MOOC forums, as well as on crowdsourced encyclopedias, such as Wikipedia, and Baidu Baike, where users interact with each other through talk pages. We discuss the state of the art on capturing the variety of users roles through different methods including the construction of user network, analysis of content posted by users, temporal analysis of user activity, posting frequency, and so on. We also discuss the available datasets and APIs to collect the data from these platforms for further research. The survey is concluded with open research questions.

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