HF propagation in tropical region; Nigerian airspace, a case study

2003 ◽  
Author(s):  
B.A. Akinribido
Keyword(s):  
Tropical Region ◽  
Hf Propagation

scholarly journals A Numerical Study on Mitigation Strategies of Urban Heat Islands in a Tropical Megacity: A Case Study in Kaohsiung City, Taiwan

2020 ◽  
Vol 12 (10) ◽  
pp. 3952 ◽  
Author(s):  
Jou-Man Huang ◽  
Liang-Chun Chen
Keyword(s):  
Thermal Environment ◽  
Numerical Study ◽  
Mitigation Strategies ◽  
Comfort Level ◽  
Tropical Region ◽  
Permeable Pavement ◽  
Coverage Ratio ◽  
Urban Heat ◽  
Cooling Effects

In recent years, with the rapid increase in global warming and urbanization, urban heat island effects (UHI) have become an important environmental issue. Taiwan is no exception, with previous studies demonstrating serious UHIs in megacities. Although existing UHI research has utilized computer simulations to analyze improvement scenarios, there are few cooling strategy studies in actual blocks of Taiwan. Therefore, this study selected a block of a megacity in a tropical region of Taiwan as a case study by ENVI-met. Five improvement strategies were tested and compared to the current situation (B0): (1) Case C1 changed to permeable pavement, (2) Case C2 increased the green coverage ratio (GCR) of the street to 60%, (3) Case C3 changed to permeable pavement and increased the GCR in the street to 60%, (4) Case C4 changed to permeable pavement, increased the GCR in the street to 60%, and increased the GCR in the parks to 80%, and (5) Case C5 changed to permeable pavement, increased GCR in the street to 60% and parks to 80%, and set the GCR on the roof of public buildings to 100%. The results showed that the average temperature of the current thermal environment is 36.0 °C, with the comfort level described as very hot. Among the five improvement schemes, C5 had the greatest effect, cooling the area by an average of 2.00 °C. Further analysis of the relationship between the different GCRs of streets (SGCR) and the cooling effects revealed that for every 10% increase in the SGCR, the temperature of the pedestrian layer was reduced by 0.15 °C.

Identifying high potential zones of gold mineralization in a sub-tropical region using Landsat-8 and ASTER remote sensing data: A case study of the Ngoura-Colomines goldfield, eastern Cameroon

2020 ◽  
Vol 122 ◽  
pp. 103530 ◽  
Author(s):  
Jonas Didero Takodjou Wambo ◽  
Amin Beiranvand Pour ◽  
Sylvestre Ganno ◽  
Paul D. Asimow ◽  
Basem Zoheir ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Gold Mineralization ◽  
Remote Sensing Data ◽  
High Potential ◽  
Tropical Region ◽  
Landsat 8 ◽  
Sensing Data ◽  
Eastern Cameroon

Simulation of river plume behaviors in a tropical region: Case study of the Upper Gulf of Thailand

2018 ◽  
Vol 153 ◽  
pp. 16-29 ◽  
Author(s):  
Xiaojie Yu ◽  
Xinyu Guo ◽  
Akihiko Morimoto ◽  
Anukul Buranapratheprat
Keyword(s):  
River Plume ◽  
Tropical Region ◽  
Gulf Of Thailand ◽  
Upper Gulf Of Thailand

Structural lineament mapping in a sub-tropical region using Landsat-8/SRTM data: a case study of Deng-Deng area in Eastern Cameroon

2021 ◽  
Vol 14 (23) ◽  
Author(s):  
Donald Hermann Fossi ◽  
Habib Dadjo Djomo ◽  
Jonas Didero Takodjou Wambo ◽  
Sylvestre Ganno ◽  
Amin Beiranvand Pour ◽  
...  
Keyword(s):  
Tropical Region ◽  
Landsat 8 ◽  
Srtm Data ◽  
Eastern Cameroon

Human Outdoor Thermal Comfort Assessment in a Tropical Region: A Case Study

2019 ◽  
Vol 3 (1) ◽  
pp. 29-42 ◽  
Author(s):  
Christian A. Njoku ◽  
Mojolaoluwa T. Daramola
Keyword(s):  
Thermal Comfort ◽  
Outdoor Thermal Comfort ◽  
Tropical Region
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