When using a gas stove to cook, the food or oil in the pot or pan may catch fire because of an excessively high temperature. In addition, people may be uncertain as to whether they have turned off the gas stove before leaving home and therefore feel compelled to return home to check. To solve these problems, this study has developed a smart kitchen fire prevention system that possesses the following devices and functions. (1) Sensors are installed above the stove top. When they detect flames, high temperature, or a gas leak, they immediately activate the gas shutoff device to turn off the gas supply. (2) The alarm produces a loud sound and flashes to warn the residents. (3) The Line reporting system sends Line messages to notify the residents and the community management center, and the main entrance door is automatically unlocked to allow relevant personnel to enter the house to deal with the accident. (4) An Internet protocol camera is installed in the kitchen to enable the residents to monitor the gas stove on their mobile phones. If they find the gas stove is still turned on, they can activate the gas shutoff device to shut off the gas supply from their phones. The system developed in this study can effectively reduce the loss that results from a kitchen fire.

The applications of remote sensing technology and aerial photography using unmanned aerial vehicles (UAVs) have facilitated the development of large-scale land environmentmonitoring technology. When design units are involved in water and soil conservation projects, engineering personnel must take valuable instruments to valleys and streams for mapping purposes; however, obtaining effective and accurate worksite information is challenging. In this study, a remote-controlled helicopter equipped with a digital camera was used to take photographs of riverside slopes that are unreachable by land. Three-dimensional (3D) models of rivers and mountain slopes were constructed through software computation. The results of this study thus provide references for design projects and show how inaccessibility problems, caused by factors such as a difficult terrain, can be solved, thereby avoiding disasters that can occur when surveying dangerous areas. The method effectively saves labor and time to ensure that hillside-related projects can be completed on schedule.