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Water Sci Technol. 2021 Jul;84(2):469-483. doi: 10.2166/wst.2021.236. ABSTRACT Color images taken by a smartphone camera were used to estimate the rate of advanced photo-oxidation reaction of Direct Red 23 (DR23) azo dye as a model organic pollutant. The red, green, blue color coordinates were tested to quantify the dye. Images of the reaction mixture were...
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BMJ Case Rep. 2021 Jul 26;14(7):e245377. doi: 10.1136/bcr-2021-245377. NO ABSTRACT PMID:34312144 | DOI:10.1136/bcr-2021-245377
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Sensors (Basel). 2021 Jul 20;21(14):4931. doi: 10.3390/s21144931. ABSTRACT Conventional lung auscultation is essential in the management of respiratory diseases. However, detecting adventitious sounds outside medical facilities remains challenging. We assessed the feasibility of lung auscultation using the smartphone built-in microphone in real-world clinical practice. We recruited 134 patients (median[interquartile range] 16[11-22.25]y; 54% male; 31% cystic...
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Sensors (Basel). 2021 Jul 13;21(14):4773. doi: 10.3390/s21144773. ABSTRACT Spatial co-location detection is the task of inferring the co-location of two or more objects in the geographic space. Mobile devices, especially a smartphone, are commonly employed to accomplish this task with the human object. Previous work focused on analyzing mobile GPS data to accomplish this task....
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Sensors (Basel). 2021 Jul 15;21(14):4839. doi: 10.3390/s21144839. ABSTRACT In this work we performed a comparison between two different approaches to track a person in indoor environments using a locating system based on BLE technology with a smartphone and a smartwatch as monitoring devices. To do so, we provide the system architecture we designed and describe...
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Sensors (Basel). 2021 Jul 14;21(14):4807. doi: 10.3390/s21144807. ABSTRACT Smartphone location recognition aims to identify the location of a smartphone on a user in specific actions such as talking or texting. This task is critical for accurate indoor navigation using pedestrian dead reckoning. Usually, for that task, a supervised network is trained on a set of...
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Sensors (Basel). 2021 Jul 13;21(14):4787. doi: 10.3390/s21144787. ABSTRACT Human activity recognition aims to classify the user activity in various applications like healthcare, gesture recognition and indoor navigation. In the latter, smartphone location recognition is gaining more attention as it enhances indoor positioning accuracy. Commonly the smartphone’s inertial sensor readings are used as input to a...
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Sensors (Basel). 2021 Jul 13;21(14):4776. doi: 10.3390/s21144776. ABSTRACT Touchscreens have been studied and developed for a long time to provide user-friendly and intuitive interfaces on displays. This paper describes the touchscreen technologies in four categories of resistive, capacitive, acoustic wave, and optical methods. Then, it addresses the main studies of SNR improvement and stylus support...
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Sensors (Basel). 2021 Jul 7;21(14):4664. doi: 10.3390/s21144664. ABSTRACT In this work, we propose a Bluetooth low energy (BLE) beacon-based algorithm to enable remote measurement of the social behavior of the participants of an observational Autism Spectrum Disorder (ASD) clinical trial (NCT03611075). We have developed a mobile application for a smartphone and a smartwatch to collect...
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Sensors (Basel). 2021 Jul 13;21(14):4770. doi: 10.3390/s21144770. ABSTRACT Assessment of health and physical function using smartphones (mHealth) has enormous potential due to the ubiquity of smartphones and their potential to provide low cost, scalable access to care as well as frequent, objective measurements, outside of clinical environments. Validation of the algorithms and outcome measures used...
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