Enhancing Water Safety: Exploring Recent Technological Approaches for Drowning Detection

Drowning poses a significant threat, resulting in unexpected injuries and fatalities. To promote water sports activities, it is crucial to develop surveillance systems that enhance safety around pools and waterways. This paper presents an overview of recent advancements in drowning detection, with a specific focus on image processing and sensor-based methods. Furthermore, the potential of artificial intelligence (AI), machine learning algorithms (MLAs), and robotics technology in this field is explored. The review examines the technological challenges, benefits, and drawbacks associated with these approaches. The findings reveal that image processing and sensor-based technologies are the most effective approaches for drowning detection systems. However, the image-processing approach requires substantial resources and sophisticated MLAs, making it costly and complex to implement. Conversely, sensor-based approaches offer practical, cost-effective, and widely applicable solutions for drowning detection. These approaches involve data transmission from the swimmer's condition to the processing unit through sensing technology, utilising both wired and wireless communication channels. This paper explores the recent developments in drowning detection systems while considering costs, complexity, and practicality in selecting and implementing such systems. The assessment of various technological approaches contributes to ongoing efforts aimed at improving water safety and reducing the risks associated with drowning incidents.

Development of an Ultra-Sensitive and Flexible Piezoresistive Flow Sensor Using Vertical Graphene Nanosheets

This paper suggests development of a flexible, lightweight, and ultra-sensitive piezoresistive flow sensor based on vertical graphene nanosheets (VGNs) with a mazelike structure. The sensor was thoroughly characterized for steady-state and oscillatory water flow monitoring applications. The results demonstrated a high sensitivity (103.91 mV (mm/s)^-1) and a very low-velocity detection threshold (1.127 mm s^-1) in steady-state flow monitoring. As one of many potential applications, we demonstrated that the proposed VGNs/PDMS flow sensor can closely mimic the vestibular hair cell sensors housed inside the semicircular canals (SCCs). As a proof of concept, magnetic resonance imaging of the human inner ear was conducted to measure the dimensions of the SCCs and to develop a 3D printed lateral semicircular canal (LSCC). The sensor was embedded into the artificial LSCC and tested for various physiological movements. The obtained results indicate that the flow sensor is able to distinguish minute changes in the rotational axis physical geometry, frequency, and amplitude. The success of this study paves the way for extending this technology not only to vestibular organ prosthesis but also to other applications such as blood/urine flow monitoring, intravenous therapy (IV), water leakage monitoring, and unmanned underwater robots through incorporation of the appropriate packaging of devices.

Quis custodiet ipsos custodes? An audit of records of involuntary detention

OBJECTIVES

To determine the appropriateness and utility of the certificates issued under the New South Wales Mental Health Act (MHA) and compliance with the requirements of the MHA. The analysis also compares MHA documentation by different groups of health professionals and police.

METHODS

The MHA certificates associated with 100 consecutive involuntary Emergency Department presentations were audited.

RESULTS

Considerable variability exists between professional groups in the level of detail, appropriateness, clinical utility and compliance of MHA certificates. Over 10% of Schedule 1s failed to meet the requirements of the MHA, potentially invalidating the involuntary detention of these patients. Information provided by police was typically superior in informing initial risk assessment and emergency management.

CONCLUSIONS

A number of patients are presently being detained under incomplete MHA certificates. Educational initiatives that aim to improve awareness of the MHA's requirements, and the potential uses of the information contained in MHA certificates, could encourage professionals to complete these certificates in a more appropriate and clinically useful manner.