The role of the prediction stategies for the reliable transformation beetween two geodetic reference systems

2021 ◽  
Author(s):  
Dionysia - Georgia Perperidou ◽  
Georgios Moschopoulos ◽  
Dimitrios Ampatzidis ◽  
Antonios Mouratidis ◽  
Alexandros Tsimerikas
Keyword(s):  
Reference System ◽  
Prediction Models ◽  
Geodetic Reference System ◽  
Reference Systems ◽  
Deterministic Approach ◽  
Systematic Effects ◽  
Common Problems ◽  
Old Greek

<p>One of he most common problems of the daily surveying/geodetic/cartographic practice is reliable transformation between two geodetic reference systems. There are plenty of well-known transformation’s models (e.g. 3D Helmert transdformation, 2D silimilarity transformaton, etc) applied for this purpose. Transformation scope is to optimally absorb the systematic inconsistencies of geodetic reference systems. In many cases, the pure deterministic approach is not sufficient, as the geodetic reference systems contain systematic effects, that are not successfully eliminated or reduced. Hence, a more sophiscticated methodology should be implemented, in order to enhance transformation’s accuracy. In this paper a case study is presented, including testing of  different deterministic transformation models between the old Greek Datum and the new official 1987 Hellenic Geodetic Reference System The estimated residuals do not fullfill the present needs of accuracy, thus we further implement some specified prediction models. The final outcome reads an improvement of the transformation between these two geodetic reference systems.</p>

scholarly journals THE VALIDATION OF THE TRANSFORMATION BETWEEN AN OLD GEODETIC REFERENCE FRAME AND A MODERN REFERENCE FRAME, BY USING EXTERNAL SPACE TECHNIQUES SITES: THE CASE STUDY OF THE HELLENIC GEODETIC REFERENCE SYSTEM OF 1987

2017 ◽  
Vol 23 (3) ◽  
pp. 434-444 ◽  
Author(s):  
Ioannis D. Doukas ◽  
Dimitrios Ampatzidis ◽  
Vassileios Kampouris
Keyword(s):  
Reference Frame ◽  
Reference Frames ◽  
Dynamic Change ◽  
Geodetic Reference System ◽  
Bias Estimation ◽  
Rigorous Approach ◽  
Systematic Effects ◽  
Tectonic Motion ◽  
Geodetic Reference Frame

Abstract: Many of the old geodetic reference frames which realized in the previous decades using classical observations carry biases. These biases are mainly caused due to the problematic observations and/or the tectonic motion. That is the case of the official Greek geodetic reference frame which consists of classical and satellite observations. Herein, we present a rigorous approach of the reconstruction of the Greek official reference frame based on the modern geodetic reference frames and their ability to express the spatial position and the dynamic change of the stations. We applied the rigorous approach to ninety stations located in Greece and we compare it with the officially accepted procedure. We found a consistency at 59.4cm between the rigorous and the officially accepted approaches, respectively. The associated mean bias estimation was estimated at 51.4 cm, indicating the resistance of a rather large amount of systematic effects. In addition, the observed discrepancies between the two approaches show great inhomogeneity all over the country.

The role of multiplicity in a cult: A case study

1987 ◽  
Author(s):  
William A. Worrall ◽  
Ann W. Stockman

Endangered Butterflies and their Non-Native Host Plants: Examining Shifting Values of Belonging in Restoration

2019 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Robert M. Anderson ◽  
Amy M. Lambert
Keyword(s):  
Ecological Restoration ◽  
Native Species ◽  
Puget Sound ◽  
A Value ◽  
The Social ◽  
Remote Island ◽  
Scientific Truth ◽  
Native Host

The island marble butterfly (Euchloe ausonides insulanus), thought to be extinct throughout the 20th century until re-discovered on a single remote island in Puget Sound in 1998, has become the focus of a concerted protection effort to prevent its extinction. However, efforts to “restore” island marble habitat conflict with efforts to “restore” the prairie ecosystem where it lives, because of the butterfly’s use of a non-native “weedy” host plant. Through a case study of the island marble project, we examine the practice of ecological restoration as the enactment of particular norms that define which species are understood to belong in the place being restored. We contextualize this case study within ongoing debates over the value of “native” species, indicative of deep-seated uncertainties and anxieties about the role of human intervention to alter or manage landscapes and ecosystems, in the time commonly described as the “Anthropocene.” We interpret the question of “what plants and animals belong in a particular place?” as not a question of scientific truth, but a value-laden construct of environmental management in practice, and we argue for deeper reflexivity on the part of environmental scientists and managers about the social values that inform ecological restoration.

Role of International Monetary Fund in the Economic Development: A Case Study of India

2012 ◽  
Vol 3 (6) ◽  
pp. 91-95
Author(s):  
A. K. Mahto A. K. Mahto ◽  
Keyword(s):  
Economic Development ◽  
International Monetary Fund

Role Of Measurable Indicators In Evidence-Informed Policy Making –Romanian Case Study

2019 ◽  
Author(s):  
Maria Elena Bozdog
Keyword(s):  
Policy Making

Drama in Education Reaching Beyond the “Art Form or Teaching Tool” Dichotomy

2018 ◽  
Vol 5 (3) ◽  
pp. 70-77
Author(s):  
Irina Lešnik
Keyword(s):  
Elementary Education ◽  
Social Issues ◽  
Drama In Education ◽  
History Curriculum ◽  
Art Form ◽  
Creative Solutions ◽  
Theatre Pedagogy ◽  
Emotional Level

Abstract In the following article we try to re-evaluate, the place drama occupies in contemporary elementary education. By limiting the role of drama to literature studies and theatre productions, we lose a greater potential Theatre Pedagogy has to offer to a much broader educational spectrum. The participatory practices of Theatre and Drama in Education (TiE, DiE) promote active learning, based on a most organic children’s activity - play. While students co-create the fictional world of drama, teacher's guidance is crucial in setting new challenges, encouraging students to find creative solutions and reflect on often-complex social issues. Because of its art component, drama challenges the participants on a cognitive as well as emotional level, becoming a truly transformational experience. As such, Drama in Education is especially useful when approaching sensitive and controversial topics. This thesis is presented on a case study observing Year 6 students at St’ Michael’s CE Academy in Birmingham, UK, using Drama in Education method as part of History curriculum.

THE ROLE OF EDUCATION ON DISASTER PREPAREDNESS CASE STUDY OF 2012 INDIAN OCEAN EARTHQUAKES ON THAILAND’S

2018 ◽  
Author(s):  
Raya Muttarak ◽  
Wiraporn Pothisiri
Keyword(s):  
Indian Ocean ◽  
Emergency Preparedness ◽  
Disaster Preparedness ◽  
Formal Education ◽  
Disaster Experience ◽  
Individual Household ◽  
The Indian Ocean ◽  
The Individual

In this paper we investigate how well residents of the Andaman coast in Phang Nga province, Thailand, are prepared for earthquakes and tsunami. It is hypothesized that formal education can promote disaster preparedness because education enhances individual cognitive and learning skills, as well as access to information. A survey was conducted of 557 households in the areas that received tsunami warnings following the Indian Ocean earthquakes on 11 April 2012. Interviews were carried out during the period of numerous aftershocks, which put residents in the region on high alert. The respondents were asked what emergency preparedness measures they had taken following the 11 April earthquakes. Using the partial proportional odds model, the paper investigates determinants of personal disaster preparedness measured as the number of preparedness actions taken. Controlling for village effects, we find that formal education, measured at the individual, household, and community levels, has a positive relationship with taking preparedness measures. For the survey group without past disaster experience, the education level of household members is positively related to disaster preparedness. The findings also show that disaster related training is most effective for individuals with high educational attainment. Furthermore, living in a community with a higher proportion of women who have at least a secondary education increases the likelihood of disaster preparedness. In conclusion, we found that formal education can increase disaster preparedness and reduce vulnerability to natural hazards.

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