# Internet of Things and Its Applications: A Comprehensive Survey
## 5 IoT Applications
### Smart City Applications  
The use of IoT has been expanded for applications of the smart city. [PERSON] et al. [113] proposed a SenSquare structural design focused on observing consumer tests of current data flows for the smart city through a mobile sensing crowd. The presented facility structure utilized the data mining categorization process to evaluate the possibility of the proposed approach. However, the data quality and users' privacy were not measured; thus, the scalability cannot be endorsed. [PERSON] et al. [114] introduced a software design for a particular numerical forensics experimental prototype. Their work investigates the forensics approach for assessing the conventional rules and manufacturing procedures. It helps to support collecting, inquiry, evaluation, and recording in an IoT numerical forensics finding application. In order to assess the proposed approach, three IoT application situations involving wearable devices, the smart home, and the smart city were studied. It introduced a model that may be able to evaluate the range of forensics data of an adjustable IoT environment. However, the proposed model does not consider security protocols, but appears to be advantageous for making the process more useful and secure. [PERSON] et al. [115] presented various applications that have been developed and applied, founded on a program called IoTalk, which is based on a locale-based IoT system. It is based on four different applications, i.e., (1) dog tracking, (2) an emergency, (3) PM2.5 checking, and (4) collecting information. First, the movements of dogs on campus are monitored. Second, the police are notified in the case of an emergency. Third, PM2.5 is checked by several sensors. Fourth, a robot containing various sensors is employed to collect the building information. It introduces a mechanism to find the location through insertion, which helps to create a system for position determination \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Reference** & **Focus Area** & **Application** & **Protocol** & **Device** \\ \hline \multirow{3}{*}{[106]} & Monitor and control many & \multirow{3}{*}{Henhouse system} & \multirow{3}{*}{MAC Protocol} & \multirow{3}{*}{Smart devices} \\  & environmental factors of & & & \\  & hehnouses in chicken farms & & & \\ \hline \multirow{3}{*}{[107]} & \multirow{3}{*}{IoT ecological monitoring system} & A prototype for wild & \multirow{3}{*}{-} & Wireless sensor \\  & vegetation environment & & & network \\ \hline \multirow{3}{*}{[108]} & The revival of a rural hydrological/ & Link located in Tasik & LoRaWAN & Cellular BS and \\  & water monitoring system & & Chini & TCP/IP & PC \\ \hline \multirow{3}{*}{[109]} & Design and modeling of a sensible & \multirow{3}{*}{Smart home} & \multirow{3}{*}{RFID} & Smart home \\  & home automation system & & & system \\ \hline \multirow{3}{*}{[110]} & A model for smart disaster & \multirow{3}{*}{Smart cities} & \multirow{3}{*}{-} & \multirow{3}{*}{-} \\  & management using ICT & & & \\ \hline \multirow{3}{*}{[111]} & Identify critical challenges in & \multirow{3}{*}{Department of \multirow{3}{*}{-}} & \multirow{3}{*}{-} & \multirow{3}{*}{-} \\  & ozone mitigation & Environment Malaysia & & \\ \hline \multirow{3}{*}{[112]} & Development of a Greenhouse & \multirow{3}{*}{Remote area} & \multirow{3}{*}{-} & NetDuino 3 \\  & Gases monitoring system & & & WIFI \\ \hline \hline \end{tabular}
\end{table} 
Table 4: IoT environmental applications. that enhances the stability of the energy efficiency and accurate tracking. [PERSON] et al. [116] created an emulator named IoT-Sim, whose main objective is to deliver and strengthen big data managing simulations through IoT. It is built on Cloudsim through the use of MapReduce in cloud computing practice. This study evaluates and assists IoT applications in real cloud computing environments and is a stimulating mission as it is a significant challenge to parallel the cost of management of a large scale of data centers with active configuration supplies.