## 4 Evaluation of System Presentation and Efficacy  
### System Presentation  
As mentioned above, the proposed system includes three basic and important tourism-related agents: the PHI agent, the RI agent, and the BS agent. On the basis of the development and practice of the Dr. What-Info system, this proposed system is expected to develop from the relevant practical technologies of mobile devices with the support of the powerful information agent system CEOntoIAS, at the back end, by referring to the UAI-based LOD access technology, as mentioned above in collaboration with GPS location interception, and with the support of appropriate link open information and domain ontology, in order to compare and intercept appropriate location service  
Figure 5: Three subsystem architectures and their functions: (**a**) personal health information monitoring and consulting agent; (**b**) restaurant information consultation and sharing agent; and (**c**) beverage safety consultation agent. GPS: global positioning system, UAI: universal application interface, APP: Application. information to effectively improve the quality of the system's mobile information regarding monitoring and recommendation. The PHI agent [34] is used by Sony SWR50 to transfer the users' walking steps back to the system front-end APP, and then graphically display the information through the APP. The current system can display the number of steps taken in the last seven days, the average number of steps per day, the amount of calories burned today, and the number of steps taken. When the user's activity on the day is lower than the target value, the user can click the \"Recommendation\" button, and then, click \"Related Knowledge\" and \"Personal Data\" to switch to the selected page for the corresponding information service, as shown in Figure 6.  
The information about quality restaurants and their corresponding parking lots, as recommended by the RI agent [35], is based on St. John's University GPS, as shown in Figure 7a,b, respectively. The corresponding webpage of the click on each line of the lower part of the above webpage is shown in Figure 7c, through which users can obtain all relevant information in advance. Finally, if users choose a destination, the system will automatically navigate and present the destination, as shown in Figure 7d. All the above bulk information recommendations are the greatest contributions of the extended exploration of this study. Figure 6: System screen display of the personal health information (PHI) agent: (**a**) system starting screen; (**b**) display of the recommendation screen at the corresponding Google map; (**c**) display of the related knowledge—BMI: Body Mass Index; and (**d**) display of the personal data—editing page. As mentioned above, the BS Agent [36] has two kinds of query modes--automatic scanning and manual query, as shown in Figure 8. When the user clicks the \"I want to scan\" button to enter the scanning page, and then presses the \"Scan\" button to focus on the desired QR/barcode, the system will display the decoded result on the screen and provide corresponding and appropriate information based on the system database. If the user clicks the query button of the additive, a more detailed information query action can be performed; if the user has further need, they can press the \"Help needed\" button to seek appropriate emergency assistance. When the user enters the emergency assistance function, the system provides a map of local police and fire stations in the case of New Taipei City, which includes current positioning information. As a result, the users can seek nearby help, and directly dial the phone to make an emergency rescue. In addition, when the user clicks the button of \"Manual Query\" on the homepage of the system, the user can manually activate the query keyword function. Finally, the official website of the Ministry of Health and Welfare is also provided on the homepage of the system, which is convenient for users to query.