![SHANGHAI, CHINA - MAY 4, 2021 - The 18.03-meter-high freedom GUNDAM standing statue on the square attracts many people to visit, Shanghai, China on May 4, 2021. (Photo by Finn / Costfoto/Sipa USA Stock Photo - Alamy SHANGHAI, CHINA - MAY 4, 2021 - The 18.03-meter-high freedom GUNDAM standing statue on the square attracts many people to visit, Shanghai, China on May 4, 2021. (Photo by Finn / Costfoto/Sipa USA Stock Photo - Alamy](https://c8.alamy.com/comp/2FKWX2N/shanghai-china-may-4-2021-the-1803-meter-high-freedom-gundam-standing-statue-on-the-square-attracts-many-people-to-visit-shanghai-china-on-may-4-2021-photo-by-finn-costfotosipa-usa-2FKWX2N.jpg)
SHANGHAI, CHINA - MAY 4, 2021 - The 18.03-meter-high freedom GUNDAM standing statue on the square attracts many people to visit, Shanghai, China on May 4, 2021. (Photo by Finn / Costfoto/Sipa USA Stock Photo - Alamy
![Sensors | Free Full-Text | A Novel Sensor Based on a Single-Pixel Microwave Radiometer for Warm Object Counting: Concept Validation and IoT Perspectives Sensors | Free Full-Text | A Novel Sensor Based on a Single-Pixel Microwave Radiometer for Warm Object Counting: Concept Validation and IoT Perspectives](https://www.mdpi.com/sensors/sensors-17-01388/article_deploy/html/images/sensors-17-01388-g015.png)
Sensors | Free Full-Text | A Novel Sensor Based on a Single-Pixel Microwave Radiometer for Warm Object Counting: Concept Validation and IoT Perspectives
![Picture from [30]: example of 5 standing people (adults) per square... | Download Scientific Diagram Picture from [30]: example of 5 standing people (adults) per square... | Download Scientific Diagram](https://www.researchgate.net/publication/317594832/figure/fig14/AS:613941923291151@1523386569291/Picture-from-30-example-of-5-standing-people-adults-per-square-meter-red-box-top_Q320.jpg)
Picture from [30]: example of 5 standing people (adults) per square... | Download Scientific Diagram
![Umar Farooq on Twitter: "Some pictures of the #Maltepe crowd, and the area that appears occupied. Take total square meters occupied and multiply by how many people you think are standing in Umar Farooq on Twitter: "Some pictures of the #Maltepe crowd, and the area that appears occupied. Take total square meters occupied and multiply by how many people you think are standing in](https://pbs.twimg.com/media/DgYT1dkWsAEhoWT.jpg)
Umar Farooq on Twitter: "Some pictures of the #Maltepe crowd, and the area that appears occupied. Take total square meters occupied and multiply by how many people you think are standing in
![Strict crowd limits set for Beijing Lunar New Year celebrations in wake of Shanghai crush | South China Morning Post Strict crowd limits set for Beijing Lunar New Year celebrations in wake of Shanghai crush | South China Morning Post](https://www.scmp.com/sites/default/files/2015/02/13/two-metre-graphic.jpg)
Strict crowd limits set for Beijing Lunar New Year celebrations in wake of Shanghai crush | South China Morning Post
![SHANGHAI, CHINA - MAY 4, 2021 - The 18.03-meter-high freedom GUNDAM standing statue on the square attracts many people to visit, Shanghai, China on May 4, 2021. (Photo by Finn / Costfoto/Sipa USA Stock Photo - Alamy SHANGHAI, CHINA - MAY 4, 2021 - The 18.03-meter-high freedom GUNDAM standing statue on the square attracts many people to visit, Shanghai, China on May 4, 2021. (Photo by Finn / Costfoto/Sipa USA Stock Photo - Alamy](https://c8.alamy.com/comp/2FKWX3C/shanghai-china-may-4-2021-the-1803-meter-high-freedom-gundam-standing-statue-on-the-square-attracts-many-people-to-visit-shanghai-china-on-may-4-2021-photo-by-finn-costfotosipa-usa-2FKWX3C.jpg)