Pub Date : 2024-06-03DOI: 10.11648/j.ajrs.20241201.14
N. Shimoi, Yu Yamauchi, Kazuhisa Nakasho
The use of thermography as a nondestructive evaluation technique is increasingly popular for maintaining concrete structures. Most inspections merely evaluate the locations and shapes of defects on surfaces. To address this shortcoming, it proposes an inspection method and preventive work using a coating-type resin sensor combined with an infrared camera. No method has been developed to assess the depth of defects. In this approach, infrared-reactive resin is applied. Thermographic images of the target area are captured sequentially. Temperature curves obtained at each pixel during the cooling process are analyzed using Fourier transform to differentiate defect states in various parts of the temperature distribution. The temperature change is found to be correlated with the defect size. Approximately 5% aluminum powder is mixed into the applied gel resin. Because of its specific gravity, it tends to concentrate in areas damaged by compression failure or to float. This report discusses technologies related to identification of defects and measuring their size in infrared-reactive resin, with examination of the effectiveness of measures to prevent scattering and collapse of defects caused by structural degradation. A concentric loading test on reinforced concrete columns confined by gel resin ties is described herein. Test variables include concrete compressive strength of 232–244 N/mm2, both below and above the equipment hole that caused the defect, and to measure the relation, a comparison with test specimens that are free of defects.
{"title":"Infrared–Resin Crack Measurement and Preventive Work Technology for Maintenance","authors":"N. Shimoi, Yu Yamauchi, Kazuhisa Nakasho","doi":"10.11648/j.ajrs.20241201.14","DOIUrl":"https://doi.org/10.11648/j.ajrs.20241201.14","url":null,"abstract":"The use of thermography as a nondestructive evaluation technique is increasingly popular for maintaining concrete structures. Most inspections merely evaluate the locations and shapes of defects on surfaces. To address this shortcoming, it proposes an inspection method and preventive work using a coating-type resin sensor combined with an infrared camera. No method has been developed to assess the depth of defects. In this approach, infrared-reactive resin is applied. Thermographic images of the target area are captured sequentially. Temperature curves obtained at each pixel during the cooling process are analyzed using Fourier transform to differentiate defect states in various parts of the temperature distribution. The temperature change is found to be correlated with the defect size. Approximately 5% aluminum powder is mixed into the applied gel resin. Because of its specific gravity, it tends to concentrate in areas damaged by compression failure or to float. This report discusses technologies related to identification of defects and measuring their size in infrared-reactive resin, with examination of the effectiveness of measures to prevent scattering and collapse of defects caused by structural degradation. A concentric loading test on reinforced concrete columns confined by gel resin ties is described herein. Test variables include concrete compressive strength of 232–244 N/mm<sup>2</sup>, both below and above the equipment hole that caused the defect, and to measure the relation, a comparison with test specimens that are free of defects.\u0000","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"129 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141388671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-29DOI: 10.11648/j.ajrs.20231102.13
Reem Yaqoub Yousif Ahmed Abdalla, Aseela Al Moalla, Mohamed Ateeg, Marwa Hossny, Shaher Bano Mirza, F. Ridouane
{"title":"Effect of Anthropogenic Activities on the Presence of Nitrogen Dioxide (NO<sub>2</sub>) Through Remote Sensing and Ground Based Observations over Emirate of Fujairah, UAE","authors":"Reem Yaqoub Yousif Ahmed Abdalla, Aseela Al Moalla, Mohamed Ateeg, Marwa Hossny, Shaher Bano Mirza, F. Ridouane","doi":"10.11648/j.ajrs.20231102.13","DOIUrl":"https://doi.org/10.11648/j.ajrs.20231102.13","url":null,"abstract":"","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139213317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Extracting information of mangroves at different tide levels from remote sensing images is challenging. In this study, we investigated the use of multiple features for mangrove information extraction, including spectral features, vegetation indices (NDVI, NIMI)
{"title":"Mangrove Information Extraction and Precision Analysis Based on Multi-Feature Combination","authors":"Mingli Zhou, Angying Xu, Chengming Yang, Lifeng Liang","doi":"10.11648/j.ajrs.20231102.12","DOIUrl":"https://doi.org/10.11648/j.ajrs.20231102.12","url":null,"abstract":": Extracting information of mangroves at different tide levels from remote sensing images is challenging. In this study, we investigated the use of multiple features for mangrove information extraction, including spectral features, vegetation indices (NDVI, NIMI)","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124207407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-17DOI: 10.11648/j.ajrs.20231102.11
Manar Ahmed Mohammed Alblooshi, Sirajul Huda Kalathingal, Shaher Bano Mirza, Fouad Lamghari Ridouane
{"title":"Assessment and Classification of Cloud Coverage Using K-Means Clustering Algorithm for the Sentinel-3 LST Data: A Case Study in the Fujairah Region","authors":"Manar Ahmed Mohammed Alblooshi, Sirajul Huda Kalathingal, Shaher Bano Mirza, Fouad Lamghari Ridouane","doi":"10.11648/j.ajrs.20231102.11","DOIUrl":"https://doi.org/10.11648/j.ajrs.20231102.11","url":null,"abstract":"","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"405 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116111280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-09DOI: 10.11648/j.ajrs.20231101.12
Meriem Zammel, Najla Allani
: In the past years, architectural heritage was represented and described through 2D plans, sections, perspective drawings, pictures, and texts. But, in the last decades, with the development of digital tools such as 3D scanner laser and photogrammetry, new technologies have been introduced in the digital survey of architectural heritage and 3D modelling. In this regard, we noticed that students, architects
{"title":"A Pedagogical Approach Using Digitalization and Heritage Building Information Modelling (HBIM) for a New Practice in Architecture and Archaeology","authors":"Meriem Zammel, Najla Allani","doi":"10.11648/j.ajrs.20231101.12","DOIUrl":"https://doi.org/10.11648/j.ajrs.20231101.12","url":null,"abstract":": In the past years, architectural heritage was represented and described through 2D plans, sections, perspective drawings, pictures, and texts. But, in the last decades, with the development of digital tools such as 3D scanner laser and photogrammetry, new technologies have been introduced in the digital survey of architectural heritage and 3D modelling. In this regard, we noticed that students, architects","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128061309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-24DOI: 10.11648/j.ajrs.20231101.11
Wendafiraw Abdisa Gemmechis, Abiyot Legesse Tura
{"title":"Modeling Land Use Land Cover Using Cellular Automata - Markov Chain: A Case of Belete Gera Regional Forest Priority Area, South Western Ethiopia","authors":"Wendafiraw Abdisa Gemmechis, Abiyot Legesse Tura","doi":"10.11648/j.ajrs.20231101.11","DOIUrl":"https://doi.org/10.11648/j.ajrs.20231101.11","url":null,"abstract":"","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125910799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-10DOI: 10.11648/j.ajrs.20221002.12
Winfred Mbinya Manetu, John Momanyi Mironga, Jackob Haywood Ondiko
{"title":"Remote Sensing for Land Resources: A Review on Satellites, Data Availability and Applications","authors":"Winfred Mbinya Manetu, John Momanyi Mironga, Jackob Haywood Ondiko","doi":"10.11648/j.ajrs.20221002.12","DOIUrl":"https://doi.org/10.11648/j.ajrs.20221002.12","url":null,"abstract":"","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125356633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-05DOI: 10.11648/J.AJRS.20210902.11
Gayatri Dwivedi, Pragati Singh, A. Singh, R. Upadhyay
Floods are an intense and frequent disaster happening in numerous portions of the world. Flood is a excess of water that submerges surroundings that is normally dry. It is the sever problem in Ganga Sub Basin - Ghaghra Confluence to Gomti Confluence of Uttar Pradesh. Near real time mapping of inundated areas is very important for figuring out the flood extent, deployment of emergency reaction teams, and evaluation of damages and casualties. In this thesis work, a real time flood mapping and monitoring online WEB based application using Sentinel-1 time-series data has been developed on Google Earth Engine (GEE) platform. The SAR Data has Capability to see through the cloud and during the flood the major problem with optical data is, it can not see through the cloud. In this thesis work the SAR data has been used to identify the inundated pixels before and during flood to identify the extent and calamities due to flood. Flood is a hazardous natural phenomenon which severely affect lives, goods and services. Monitoring of flood affected area becomes compulsory for emergency responses but due to damage of network and risk for lives in going such areas it becomes a very typical task. Google Earth Engine (GEE) is an open-source cloud based online platform which reduces this problem. In this thesis work the GEE platform has been used for Near-Real time flood mapping in the study area. The GEE based app “FLOOD MONITORING SYSTEM: GANGA SUB BASIN – GHAGHRA CONFLUENCE TO GOMTI CONFLUENCE” has been developed for Near-Real time flood Mapping.
{"title":"Google Earth Engine Based Approach for Assessment and Management of Flood in Ganga Sub Basin – Ghaghra Confluence to Gomti Confluence","authors":"Gayatri Dwivedi, Pragati Singh, A. Singh, R. Upadhyay","doi":"10.11648/J.AJRS.20210902.11","DOIUrl":"https://doi.org/10.11648/J.AJRS.20210902.11","url":null,"abstract":"Floods are an intense and frequent disaster happening in numerous portions of the world. Flood is a excess of water that submerges surroundings that is normally dry. It is the sever problem in Ganga Sub Basin - Ghaghra Confluence to Gomti Confluence of Uttar Pradesh. Near real time mapping of inundated areas is very important for figuring out the flood extent, deployment of emergency reaction teams, and evaluation of damages and casualties. In this thesis work, a real time flood mapping and monitoring online WEB based application using Sentinel-1 time-series data has been developed on Google Earth Engine (GEE) platform. The SAR Data has Capability to see through the cloud and during the flood the major problem with optical data is, it can not see through the cloud. In this thesis work the SAR data has been used to identify the inundated pixels before and during flood to identify the extent and calamities due to flood. Flood is a hazardous natural phenomenon which severely affect lives, goods and services. Monitoring of flood affected area becomes compulsory for emergency responses but due to damage of network and risk for lives in going such areas it becomes a very typical task. Google Earth Engine (GEE) is an open-source cloud based online platform which reduces this problem. In this thesis work the GEE platform has been used for Near-Real time flood mapping in the study area. The GEE based app “FLOOD MONITORING SYSTEM: GANGA SUB BASIN – GHAGHRA CONFLUENCE TO GOMTI CONFLUENCE” has been developed for Near-Real time flood Mapping.","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125269697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-08DOI: 10.11648/J.AJRS.20210901.17
Tankie Quinta Shegwe, Wirsiy Destain Yungsi, Sirri Erika Suh, Tchana Christian Brice, Aloysious Kohtem Lebga, Takem Mbi Bienvenu Magloire, C. Ngouanet
Man has greatly influenced the environment through his different activities, technology and dynamism. These modifications are land use/land cover changes. This research describes and analyses the implication of land use dynamics on resources in the Sabga-Bamunka area over time and space from 1980 to 2020. Remote sensing techniques and Geographic Information System were used in describing and analysing land use/cover changes in the Sabga-Bamunka area. Primary data was obtained through field observation in order to confirm observation on satellite imageries. Land use maps were produced using GIS software. Maps were generated to show changes in land use/land cover which were transposed into table and bar graphs to show the magnitude of changes. The analysis of static land use maps of 1980, 2010 and 2020 all showed that there are significant changes observed on forest cover, farmland, grazing land and settlement area. The findings revealed that the study area has experienced a drastic change in land use/land cover during the last forty years. The study area is characterised with decrease in grassland areas, forest and increase in settlement and farmland due to the increasing population which are the main triggering force of land use/land cover changes that has led to the reduction in vegetal cover. Forest decreased from 6 568 hectares (26%) in 1980 to 2 842 hectares (10%) in 2020 indicating a magnitude change of -3726 (-29%) and grass land decreased from 16 434 hectares (64%) in 1980 to 14 585 hectares (53%) in 2020 that is a magnitude change of -1849 (-14%). These decreases gave way to settlements and farmland. Therefore, a reduction in the excessive consumption of fuel wood, the practice of eco-forestry, raising of awareness and a dialogue plate-form are amongst the measures recommended to reduce land use/land cover change in the study area.
{"title":"Land Use / Land Cover Change in the Western Highlands of Cameroon: Case of the Sabga-Bamunka Area (1980-2020)","authors":"Tankie Quinta Shegwe, Wirsiy Destain Yungsi, Sirri Erika Suh, Tchana Christian Brice, Aloysious Kohtem Lebga, Takem Mbi Bienvenu Magloire, C. Ngouanet","doi":"10.11648/J.AJRS.20210901.17","DOIUrl":"https://doi.org/10.11648/J.AJRS.20210901.17","url":null,"abstract":"Man has greatly influenced the environment through his different activities, technology and dynamism. These modifications are land use/land cover changes. This research describes and analyses the implication of land use dynamics on resources in the Sabga-Bamunka area over time and space from 1980 to 2020. Remote sensing techniques and Geographic Information System were used in describing and analysing land use/cover changes in the Sabga-Bamunka area. Primary data was obtained through field observation in order to confirm observation on satellite imageries. Land use maps were produced using GIS software. Maps were generated to show changes in land use/land cover which were transposed into table and bar graphs to show the magnitude of changes. The analysis of static land use maps of 1980, 2010 and 2020 all showed that there are significant changes observed on forest cover, farmland, grazing land and settlement area. The findings revealed that the study area has experienced a drastic change in land use/land cover during the last forty years. The study area is characterised with decrease in grassland areas, forest and increase in settlement and farmland due to the increasing population which are the main triggering force of land use/land cover changes that has led to the reduction in vegetal cover. Forest decreased from 6 568 hectares (26%) in 1980 to 2 842 hectares (10%) in 2020 indicating a magnitude change of -3726 (-29%) and grass land decreased from 16 434 hectares (64%) in 1980 to 14 585 hectares (53%) in 2020 that is a magnitude change of -1849 (-14%). These decreases gave way to settlements and farmland. Therefore, a reduction in the excessive consumption of fuel wood, the practice of eco-forestry, raising of awareness and a dialogue plate-form are amongst the measures recommended to reduce land use/land cover change in the study area.","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"194 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134274651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-26DOI: 10.11648/J.AJRS.20210901.16
R. Ndiaye, Bouna Ndiaye, V. Traoré, A. Diaw
This study aims to understand factors that are causing the malfunction of the garbage collection system in the municipality of Ngor. To achieve this goal, we have adopted a methodological approach that focuses essentially on three components: (i) the investigation of 1/4 of Ngor's concessions through observation, interviews, questionnaires and documentation for collect socio-economic data; (ii) GPS surveys and mapping of the study area using GIS techniques and tools based on satellite images; (iii) analysis of collected information based on descriptive statistics. The results obtained reveal a bad garbage collection, which is at the origin of the insalubrities, the development of flies, mosquitoes and rodents having repercussions on the frame of life of the populations. It is also at the origin of the narrow streets, thus making access to neighborhoods difficult; this leads people to dispose of garbage in the open air or on the beach and in the evacuation channels, to the detriment of environmental concerns. This study has clearly highlighted deficiencies of human nature in the system of collection of household garbage in the municipality of Ngor. These results should provide the municipal authorities with a basis for thinking about the reformulation of their system of governance of such garbage and their political will to definitively solve the problem.
{"title":"Household Solid Waste, a Challenge of Urban Sanitation: Case of Ngor Municipality (Dakar, Senegal)","authors":"R. Ndiaye, Bouna Ndiaye, V. Traoré, A. Diaw","doi":"10.11648/J.AJRS.20210901.16","DOIUrl":"https://doi.org/10.11648/J.AJRS.20210901.16","url":null,"abstract":"This study aims to understand factors that are causing the malfunction of the garbage collection system in the municipality of Ngor. To achieve this goal, we have adopted a methodological approach that focuses essentially on three components: (i) the investigation of 1/4 of Ngor's concessions through observation, interviews, questionnaires and documentation for collect socio-economic data; (ii) GPS surveys and mapping of the study area using GIS techniques and tools based on satellite images; (iii) analysis of collected information based on descriptive statistics. The results obtained reveal a bad garbage collection, which is at the origin of the insalubrities, the development of flies, mosquitoes and rodents having repercussions on the frame of life of the populations. It is also at the origin of the narrow streets, thus making access to neighborhoods difficult; this leads people to dispose of garbage in the open air or on the beach and in the evacuation channels, to the detriment of environmental concerns. This study has clearly highlighted deficiencies of human nature in the system of collection of household garbage in the municipality of Ngor. These results should provide the municipal authorities with a basis for thinking about the reformulation of their system of governance of such garbage and their political will to definitively solve the problem.","PeriodicalId":417484,"journal":{"name":"American Journal of Remote Sensing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130043416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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