How to monitor the distance from smartphones?
Best insight from top research papers
To monitor the distance from smartphones, various methods have been proposed in the literature. One approach involves using the smartphones' microphones and speakers to emit and record audio signals, allowing the calculation of sound propagation delay and distance . Another method utilizes Time of Flight of near-ultrasound signals to measure distance between multiple phones, providing real-time alerts for social distancing . Proximity detection can also be achieved by analyzing Wi-Fi signals using data mining techniques, estimating the distance between individuals . Additionally, a mobile application can utilize the front camera to estimate the distance between the phone and the user, providing warnings to maintain a safe distance and prevent ocular health issues . These methods offer different approaches to monitor distance from smartphones, catering to various needs and applications.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
| The paper describes a platform called Comm2Sense that uses data mining techniques applied to Wi-Fi RSSI to estimate the distance between smartphones and detect proximity among users. | |
24 Aug 2015 14 Citations | The paper presents a mobile application that uses the front camera to estimate the distance between the smartphone and the user. When the distance is too short, the system alerts the user. |
Open access•Posted Content | The paper presents a method to measure the distance between smartphones using Time of Flight of near-ultrasound signals, without requiring additional hardware or manual calibration. |
31 Aug 2022 | The paper presents a method for measuring the distance between smartphones using their microphones and speakers to calculate sound propagation delay. |
09 Jun 2022 | The paper presents an approach to monitor the distance between smartphones using their microphones and speakers to emit and record audio signals, without the need for clock time synchronization. |
Related Questions
How to monitore female athletes?4 answersFemale athletes can be monitored using various tools and methods. Monitoring internal load can be done through questionnaires, perceived exertion rating, and heart rate measures. External load can be monitored using GPS tracking and TRIMP. Additionally, monitoring the menstrual cycle is crucial for providing a complete picture of an athlete's health. Screening tools, such as questionnaires and interviews, can be used to obtain medical and family history and identify any pre-existing conditions or risks. Monitoring day-to-day physical, physiological, and psychological changes across the menstrual cycle can provide insight into menstrual health and identify any potential issues. It is important to tailor the screening and monitoring tools to the individual due to the large variability in the menstrual cycle and the use of hormonal contraceptives. Overall, monitoring methods should be individualized, inexpensive, easily implemented, and sustainable for youth populations.
How to monitor exposure?4 answersExposure monitoring can be done through various methods such as sampling and analysis of different sample types, including airborne pollutants and dermal exposure. Monitoring units equipped with air quality sensors can generate particle data about particles in the environment and transmit it to a remote computing unit for analysis. Media exposure can be monitored by reporting impressions and instructing client devices to send requests to different internet domains. Risk assessment methods and exposure monitoring approaches need to be enhanced to be more inclusive of environmental justice (EJ) community involvement and representative of EJ community exposures. Monitoring the focusing deflection value of an exposure device can be achieved by measuring the side wall angles of a pattern on a wafer and comparing them to a specific relational expression.
How can mobile applications be used to improve traffic monitoring systems?4 answersMobile applications can be used to improve traffic monitoring systems in several ways. Firstly, they can utilize the built-in capabilities of mobile devices, such as Wi-Fi, 3G/4G/LTE, and Bluetooth, to gather data from multiple sources and support real-time decision making. Secondly, mobile crowd sensing technology allows users to participate in data collection by using their mobile devices, enabling the monitoring of traffic conditions, crowd levels, and quality of public transport systems. Additionally, mobile applications can be used to present the content of traffic control systems, providing users with real-time information and assisting in reducing the negative environmental impact of the transport system. Furthermore, the low computational cost of mobile device algorithms allows for the centralized collection of a massive number of traffic measurements, improving the accuracy of traffic monitoring systems. Overall, mobile applications offer a powerful tool for improving traffic monitoring systems by leveraging the capabilities of mobile devices and involving users in data collection.
What are the different ways to track phone activity?5 answersThere are several ways to track phone activity. One method involves using the built-in accelerometers in smartphones to quantify patient activities and movements. This approach utilizes a hidden Markov model (HMM) that tracks changes in both activities and phone locations, improving tracking accuracy compared to a static classifier alone. Another method involves scanning for pre-connected devices in a vehicle and recording usage data of both the vehicle and the handheld device. This data is then uploaded to a cloud and can be viewed by authorized users. Additionally, a portable communication device can track device communication activity and location using a SIM card and a device-activity SIM application toolkit (SAT) application. The device-activity data is stored and uploaded to a remote server accessible via the internet. Finally, an activity recording system can detect user motion and record it as main data, with supplementary data from a mobile terminal used to fill in missing periods in the main data.
What are the best ways to monitor blood glucose levels?5 answersContinuous glucose monitoring (CGM) is considered the most desirable way to monitor blood glucose levels. CGM allows for real-time, continuous monitoring of glucose levels, providing more accurate and precise results compared to traditional methods. Wearable and implantable biosensors have become popular for monitoring blood sugar levels in real time. These biosensors can detect glucose levels in different biofluids such as tissue fluid, sweat, tears, and saliva. Non-invasive techniques, such as infrared spectroscopy and NIR spectroscopy, have also been explored for glucose monitoring without the need for pricking the skin. Invasive methods, although more accurate, are invasive, painful, and time-consuming. Point-of-care devices have been developed to simplify glucose detection and monitoring, offering self-detection and monitoring capabilities. Overall, the best ways to monitor blood glucose levels include continuous glucose monitoring, wearable and implantable biosensors, non-invasive techniques, and point-of-care devices.
Which device is used by police to track cell phones?7 answers