Satellite-based phenology products and in-situ pollen dynamics: A comparative assessment

2022 ◽  
Vol 204 ◽  
pp. 111937
Author(s):  
Linze Li ◽  
Dalai Hao ◽  
Xuecao Li ◽  
Min Chen ◽  
Yuyu Zhou ◽  
...  
2017 ◽  
Vol 154 ◽  
pp. 198-206 ◽  
Author(s):  
Ioannis A. Atsonios ◽  
Ioannis D. Mandilaras ◽  
Dimos A. Kontogeorgos ◽  
Maria A. Founti

Author(s):  
H. A. P. Audu ◽  
M. Y. Tijjani

This study carried out the comparative evaluation of the accuracy of elevation differences determined from two Geomatics instruments and techniques in part of University of Benin, Ugbowo Campus. Reconnaissance survey was carried out and the two Geomatics instruments (Total station instrument and the Automatic level instrument) used for this study were tested and found to be in good working conditions. In line with the survey regulation, the position of the control stations (UB GPS101and UB GPS102) where the survey commenced were checked for disturbance and the obtained angular and linear measurements proved that the control stations were in situ. The perimeter traversing, using the total station instrument, with closed traverse technique and the perimeter levelling using the trigonometric levelling method and the level instrument with flying level both commenced from the GPS control stations and terminated at the same control stations. The known coordinates of UB GPS102, when compared with those determined with the total station instrument, have some millimetres differences. The difference in the elevation of the GPS control station and the elevation determined for the same control station with the total station instrument was in millimetre. These values were within the specified and acceptable accuracy limits. The accuracy of the tertiary traverse survey, which has satisfied the allowable accuracy limits for tertiary traverse survey, was 1: 41,428.043. The allowable accuracy for third order levelling for the study area was 26mm. Their computed accuracies using the total station and level instruments were 21mm and 13mm respectively. Although the elevations determined from the two Geomatics instruments met the standard accuracy limits for tertiary levelling, the accuracy of the elevations obtained with the level instrument is higher than those obtained with the total station instrument. These results are in conformity with the findings of some researchers on the related subject matter.


2019 ◽  
Vol 75 (3) ◽  
pp. 7-20
Author(s):  
Imane Djebbour ◽  
Ratiba Wided BIARA

The question of adaptive reuse offers a harmony between physical character and functional of historical buildings. It becomes an effective strategy in order to enhance its sustainability and revitalize the overall appearance of the city. The interaction between the decision of reuse and sustainability aims only to find a balance between the project and sustainable development criteria. It mainly relies on the constant evaluation of historical building’s sustainability. In the case of Tlemcen city, the event “Tlemcen capital of the Islamic culture” has been a chance for the reuse of monuments in museums in order to endure over time. This document aims to examine how sustainability changes from a monument to another to identify issues affecting the sustainability of reused monuments. Based on an empirical approach, the document makes a comparative assessment of the six monuments reused as museums in Tlemcen city, which has a qualitative study based mainly on 80 semi-directive interviews with the three samples of the population; heritage specialists, managers and ordinary citizens. The research also began with a document analysis to review the changes brought by historical stratification also an in-situ observation that provides an opportunity to analyze monuments in the field. Finally, the quantitative evaluation was carried out using an evaluation grid containing an evaluation scale and the set of indicators obtained from the interview conducted. The results obtained from this study reveal that sustainability varies from case to another depending on the primary characteristics of the monument that directly affects the sustainability’s score of each criterion that influences the adaptive reuse process. Indeed, the new "museum" function installed does not ensureby itself a unified sustainability of the studied monuments. 


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