Abstract: The present invention is for a system and method for determining the proximity of a mobile device to a location without the use of a satellite based or other location awareness system, nor a stationary beacon of any kind. Instead, the mobile device monitors radio frequency broadcast identification codes from nearby mobile devices, and determines if the set of detected identification codes is sufficiently similar to a weighted set of identification codes attributed to specified location. If the calculation of similarity meets the confidence conditions of the system, notification is made that the customer or visitor has arrived. The invention utilizes a combination of confidence interval computation, machine learning, and fault tolerance mechanisms to optimize the success of correctly detecting that the device is near the relevant location.

Abstract: The present invention relates to a system for protecting underground utilities and preventing damages which can be easily manufactured, carried, installed, and removed, and can minimize breakage of underground utilities and danger of an accident due to the breakage, by transmitting direct warning through light or sound in response to pressure applied over a predetermined level, or by transmitting a dangerous situation to an underground utilities management server.

Abstract: A method for monitoring and controlling a household appliance is provided. The method has the steps of: monitoring and sampling the power of the household appliance to obtain a first standby power range; monitoring and sampling the power of the household appliance to obtain a set of first real-time power data; calculating a first standby confidence level based on the number of times that the first real-time power data fall within the first standby power range; and determining that the household appliance is in a standby state if the first standby confidence level is greater than or equal to a standby confidence level threshold.