# Internet of Things for Sensing: A Case Study in the Healthcare System
## 6 Results and Discussion  
This section describes the simulation results obtained during the experiment. Firstly, we examine the CFR obtained for five human activities such as sitting on a chair, walking around the room, push-ups, squatting, and sleep episodes due to ND, as shown in Figure 2. \begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{**(a) Accuracy of SVM Used for Sleep Attack Detection—With Microwave Absorbing Material**} & & & & & & & & & & \\ \hline \multicolumn{1}{c}{**Kernel**} & & & & & & & & & & & & \\ \hline \multicolumn{1}{c}{**Function**} & **S** & **a** & **b** & **c** & **d** & **e** & **a** & **b** & **c** & **d** & **e** \\ \hline \multirow{3}{*}{**Linear**} & 40 & 98.75 & 78.25 & 90.50 & 98.25 & 65.00 & 97.00 & 75.25 & 94.75 & 98.50 & 84.00 \\  & 80 & 98.25 & 77.25 & 91.75 & 98.00 & 65.50 & 98.75 & 78.25 & 95.25 & 98.75 & 87.00 \\  & 120 & 98.25 & 76.50 & 90.00 & 98.00 & 66.25 & 99.00 & 78.00 & 95.50 & 99.00 & 89.75 \\ \hline \multirow{3}{*}{**Polynomial**} & 40 & 98.50 & 69.25 & 89.50 & 95.00 & 80.50 & 95.50 & 81.75 & 90.50 & 98.50 & 89.75 \\  & 80 & 99.50 & 71.50 & 87.75 & 95.00 & 85.25 & 98.00 & 87.75 & 92.25 & 98.50 & 92.00 \\  & 120 & 99.00 & 74.25 & 88.50 & 99.00 & 87.75 & 98.50 & 84.75 & 95.25 & 98.50 & 92.75 \\ \hline \multirow{3}{*}{**RBF**} & 40 & 98.25 & 74.75 & 89.50 & 98.00 & 84.00 & 98.25 & 78.75 & 92.50 & 99.50 & 88.50 \\  & 80 & 98.25 & 74.50 & 89.00 & 98.25 & 86.25 & 98.25 & 83.25 & 95.00 & 99.25 & 91.00 \\  & 120 & 98.25 & 88.00 & 88.50 & 98.00 & 87.25 & 98.75 & 84.50 & 96.00 & 99.25 & 91.25 \\ \hline \hline \multicolumn{1}{c}{**(b) Accuracy of SVM Used for Sleep Attack Detection—Without Microwave Absorbing Material**} & & & & & & & & & & \\ \hline \multicolumn{1}{c}{**Kernel**} & & & & & & & & & & & \\ \hline \multicolumn{1}{c}{**Function**} & **S** & **a** & **b** & **c** & **d** & **e** & **a** & **b** & **c** & **d** & **e** \\ \hline \multirow{3}{*}{**Linear**} & 40 & 91.65 & 74.19 & 85.50 & 96.80 & 60.00 & 91.50 & 73.13 & 91.98 & 96.52 & 82.22 \\  & 80 & 93.11 & 74.87 & 86.55 & 96.14 & 61.43 & 92.04 & 74.91 & 92.11 & 96.61 & 84.74 \\  & 120 & 95.55 & 74.71 & 87.52 & 96.00 & 62.31 & 91.95 & 75.11 & 97.50 & 97.43 & 88.75 \\ \hline \multirow{3}{*}{**Polynomial**} & 40 & 92.75 & 66.14 & 88.82 & 96.61 & 77.52 & 92.50 & 79.81 & 88.00 & 96.19 & 81.12 \\  & 80 & 94.28 & 66.50 & 89.85 & 91.21 & 79.52 & 94.42 & 79.90 & 89.13 & 95.93 & 89.54 \\  & 120 & 94.96 & 70.13 & 88.89 & 97.11 & 83.81 & 96.62 & 80.01 & 91.72 & 97.09 & 88.75 \\ \hline \multirow{3}{*}{**RBF**} & 40 & 96.69 & 71.11 & 90.10 & 98.21 & 80.14 & 97.15 & 76.75 & 90.80 & 95.31 & 85.77 \\  & 80 & 96.11 & 71.32 & 90.32 & 98.71 & 80.85 & 97.95 & 80.94 & 91.84 & 95.54 & 90.64 \\ \cline{1-1}  & 120 & 96.25 & 74.43 & 90.51 & 98.28 & 81.25 & 97.75 & 81.74 & 92.56 & 96.33 & 88.91 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Accuracy of SVM used for sleep attack detection (%). Figure 2: Channel frequency response (CFR) data obtained for five different human activities, different colors in the figures indicate variances of amplitude information of different frequencies. Figure 2 describes the CFR data for various human activities, transitioning from one activity to another over a period of time. We analyze each human activity that has induced a particular CFR pattern. For example, when the subject was sitting on a chair, the corresponding amplitude information against 30 frequencies is almost stationary, as evident in Figure 2a, but as the person started walking, the wireless medium constantly got disturbed, and as a result, the CFR data also changed, as in Figure 2b. On the other hand, slight variances in amplitude information against the 30 frequencies can be observed in Figure 2c when the subject was performing push-ups on the ground. Figure 2e describes the results of squatting. When the person experienced sleep episodes, due to which no large-scale movement was observed within wireless range, the amplitude information remained stationary.