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—Obstructive sleep apnea (OSA) is a common disorder in which individuals stop breathing during their sleep. Most of sleep apnea cases are currently undiagnosed because of expenses and practicality limitations of overnight polysomnography (PSG) at sleep labs, where an expert human observer is needed to work over night. New techniques for sleep apnea(More)
Due to high restrictions in wireless sensor networks, where the resources are limited, clustering protocols for routing organization have been proposed in much research for increasing system throughput, decreasing system delay and saving energy. Even these algorithms have proposed some levels of security, but because of their dynamic nature of(More)
Wireless sensor networks are facing many challenges such as the limited resource in processing power, storage and energy. The limited energy resource is one of the main challenges facing the security in such networks. This paper aims to improve the current security mechanisms in wireless sensor networks as well as reducing power consumption. LEACH protocol(More)
Due to the high speed of internet and advances in technology, people are becoming more worried about information being hacked by attackers. Recently, many algorithms of steganography and data hiding have been proposed. Steganography is a process of embedding the secret information inside the host medium (text, audio, image and video). Concurrently, many of(More)
Robust paradigms are a necessity, particularly for emerging wireless sensor network (WSN) applications. The lack of robust and efficient paradigms causes a reduction in the provision of quality of service (QoS) and additional energy consumption. In this paper, we introduce modular energy-efficient and robust paradigms that involve two archetypes: (1) the(More)
Recently, Wireless Sensor Networks (WSNs) have emerged to provide a variety of important applications with low cost sensors. The task of the sensors is to collect data and send it to the sink node which delivers the data to a task manager. However, these sensors have limited power and thus limited lifetime. Another important consideration in WSNs is the(More)
This paper introduces the design, implementation, and performance analysis of the scalable and mobility-aware hybrid protocol named boarder node medium access control (BN-MAC) for wireless sensor networks (WSNs), which leverages the characteristics of scheduled and contention-based MAC protocols. Like contention-based MAC protocols, BN-MAC achieves high(More)