# Quantification and Analysis of Group Sentiment in Electromagnetic Radiation Public Opinion Events
## 3 EMR Public Sentiment Analysis System Design
### Public Sentiment Analysis of EMR  
#### 3.2.1 Establishing the Link Between EMR and Social Emotions  
EMR is the transfer of momentum and energy through space in the form of waves, generated by the interaction of electric and magnetic fields. The interplay of these fields creates electromagnetic waves, which propagate into the air, forming EMR [28]. EMFs disturb immune function through the stimulation of various allergic and inflammatory responses, as well as effects on tissue repair processes. Such disturbances increase the risk of various diseases, including cancer. These and EMFs' effects on other biological processes (e.g., DNA damage, neurological effects, etc.) are now widely reported to occur at exposure levels significantly below most current national and international safety limits [27]. As these research findings have emerged, public awareness of risks and rights has grown, leading to more frequent advocacy and rights protection movements. The dangers associated with EMR not only cause public health concerns and panic, but also significantly impact public opinion and emotions. This, in turn, can hinder the development of new infrastructure and technological innovation in the digital economy. These \"NIMBY events\" are highly sensitive, easily triggering collective emotional reactions, with negative emotions spreading quickly and potentially leading to public opinion crises online. Given these characteristics, this study aims to establish a method for quantifying social group emotions related to electromagnetic radiation. By thoroughly analyzing the characteristics of network public opinion in such events, this study seeks to propose effective strategies for relevant departments to manage network public opinion related to electromagnetic radiation. This approach aims to prevent conflicts between the public and project developers, thus avoiding losses for both parties.  
\begin{table}
\begin{tabular}{c c c} \hline \hline \multicolumn{2}{c}{**Number of Posts with Positive Emotions Related to the Topic (Number)**} & **Number of Posts with Negative Emotions Related to the Topic (Number)** \\ \hline
**keyword-based** & 4 & 6 \\
**semantic-based** & 8 & 7 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Positive or negative number of topic-related posts in the top ten emotional-value rankings.  
Group emotion arises when individuals are influenced by verbal or non-verbal cues from others, leading to emotional contagion and the spread of a unified outward emotion. These emotions can be positive, negative, or neutral. Collective emotions driven by the NIMBY effect occur when the public fears that a project will negatively impact their health and environment, infringing on their rights, leading to strong opposition and even collective protests. In the resulting network public opinion events, netizens express their attitudes toward EMR through words or emoticons. The emotions conveyed by these words and symbols spread online, allowing readers to perceive the individual's emotional stance, understand their view of the event, and subsequently express their own emotions. This study aims to design and construct a multi-level emotion transmission chain to accurately simulate the spread of emotions under the NIMBY effect and quantify collective emotions based on these characteristics.