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Peng Jiang, Yang Feng, Feng Wu
This study addresses the optimization of node redeployment coverage in underwater wireless sensor networks. Given that nodes could easily become invalid under a poor environment and the large scale of underwater wireless sensor networks, an underwater sensor network redeployment algorithm was developed based on wolf search. This study is to apply the wolf search algorithm combined with crowded degree control in the deployment of underwater wireless sensor networks. The proposed algorithm uses nodes to ensure coverage of the events, and it avoids the prematurity of the nodes...
October 21, 2016: Sensors
Encheng Xin, Yong Ju, Haiwen Yuan
A space charge density wireless measurement system based on the idea of distributed measurement is proposed for collecting and monitoring the space charge density in an ultra-high-voltage direct-current (UHVDC) environment. The proposed system architecture is composed of a number of wireless nodes connected with space charge density sensors and a base station. The space charge density sensor based on atmospheric ion counter method is elaborated and developed, and the ARM microprocessor and Zigbee radio frequency module are applied...
October 20, 2016: Sensors
Sofía Aparicio, María I Martínez-Garrido, Javier Ranz, Rafael Fort, Miguel Ángel G Izquierdo
This paper provides a performance evaluation of tree and mesh routing topologies of wireless sensor networks (WSNs) in a cultural heritage site. The historical site selected was San Juan Bautista church in Talamanca de Jarama (Madrid, Spain). We report the preliminary analysis required to study the effects of heating in this historical location using WSNs to monitor the temperature and humidity conditions during periods of weeks. To test which routing topology was better for this kind of application, the WSNs were first deployed on the upper floor of the CAEND institute in Arganda del Rey simulating the church deployment, but in the former scenario there was no direct line of sight between the WSN elements...
October 19, 2016: Sensors
Ali Fatih Demir, Qammer Abbasi, Zekeriyya Esat Ankarali, Akram Alomainy, Khalid Qaraqe, Erchin Serpedin, Huseyin Arslan
In vivo wireless body area networks (WBANs) and their associated technologies are shaping the future of healthcare by providing continuous health monitoring and noninvasive surgical capabilities, in addition to remote diagnostic and treatment of diseases. To fully exploit the potential of such devices, it is necessary to characterize the communication channel which will help to build reliable and high-performance communication systems. This paper presents an in vivo wireless communication channel characterization for male torso both numerically and experimentally (on a human cadaver) considering various organs at 915 MHz and 2...
October 19, 2016: IEEE Journal of Biomedical and Health Informatics
Matthieu O Pasquet, Matthieu Tihy, Aurélie Gourgeon, Marco N Pompili, Bill P Godsil, Clément Léna, Guillaume P Dugué
While miniature inertial sensors offer a promising means for precisely detecting, quantifying and classifying animal behaviors, versatile inertial sensing devices adapted for small, freely-moving laboratory animals are still lacking. We developed a standalone and cost-effective platform for performing high-rate wireless inertial measurements of head movements in rats. Our system is designed to enable real-time bidirectional communication between the headborne inertial sensing device and third party systems, which can be used for precise data timestamping and low-latency motion-triggered applications...
October 21, 2016: Scientific Reports
Antonietta Stango, Kamya Yekeh Yazdandoost, Francesco Negro, Dario Farina
Wireless implanted devices can be used to interface patients with disabilities with the aim of restoring impaired motor functions. Implanted devices that record and transmit electromyographic (EMG) signals have been applied for the control of active prostheses. This simulation study investigates the propagation losses and the absorption rate of a wireless radio frequency link for in-to-on body communication in the medical implant communication service (MICS) frequency band to control myoelectric upper limb prostheses...
2016: PloS One
Lisa M Quintiliani, Devin M Mann, Marissa Puputti, Emily Quinn, Deborah J Bowen
BACKGROUND: Health behavior and weight management interventions for cancer survivors have the potential to prevent future cancer recurrence and improve long-term health; however, their translation can be limited if the intervention is complex and involves high participant burden. Mobile health (mHealth) offers a delivery modality to integrate interventions into daily life routines. OBJECTIVE: The objective of this study was to evaluate the effects of a one-group trial with a pre-post evaluation design on engagement (use and acceptability), physiological (weight), behavioral (diet and physical activity), and other secondary outcomes...
January 2016: JMIR Cancer
Joel E Abbott, Roger L Sur
The aim of this paper was to evaluate the current technology and designs of flexible ureterorenoscopes. We will review contemporary fiberoptic and digital ureteroscopes, including a discussion on ureteroscope damage and repair, and lastly present the projected future of flexible ureterorenoscopy. Ureterorenoscopy has evolved dramatically over the past several decades, which has led to landscape reshaping of stone disease treatment and upper tract pathology. Advancements in tip control, miniaturization of scopes, introduction of a digital chip on the tip, disposable devices to augment surgery, surgical experience/familiarity and most recently single use scopes are all independent factors that have increased flexible ureterorenoscopy adoption and success...
October 19, 2016: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
Christine M Eisenhauer, Patricia A Hageman, Sheri Rowland, Betsy J Becker, Susan A Barnason, Carol H Pullen
OBJECTIVE: To examine rural men's use and perceptions of mobile and wireless devices to self-monitor eating and physical activity (mHealth). DESIGN AND SAMPLE: Men in this 3-week pilot study used FitBit One(®) to log daily food intake and monitor activity. A companion application (app) allowed activity monitoring of fellow participants. Health-related text messages were received 1-3 times daily. A purposive sample of 12 rural men (ages 40-67) was recruited by community leaders...
October 18, 2016: Public Health Nursing
Hao Chen, Xiaoyun Xie, Wanneng Shu, Naixue Xiong
With the rapid growth of wireless sensor applications, the user interfaces and configurations of smart homes have become so complicated and inflexible that users usually have to spend a great amount of time studying them and adapting to their expected operation. In order to improve user experience, a weighted hybrid recommender system based on a Kalman Filter model is proposed to predict what users might want to do next, especially when users are located in a smart home with an enhanced living environment. Specifically, a weight hybridization method was introduced, which combines contextual collaborative filter and the contextual content-based recommendations...
October 15, 2016: Sensors
Duo Sheng, Min-Rong Hong
This paper presents an all-digital low-power oscillator for reference clocks in wireless body area network (WBAN) applications. The proposed on-chip complementary metal-oxide-semiconductor (CMOS) oscillator provides low-frequency clock signals with low power consumption, high delay resolution, and low circuit complexity. The cascade-stage structure of the proposed design simultaneously achieves high resolution and a wide frequency range. The proposed hysteresis delay cell further reduces the power consumption and hardware costs by 92...
October 14, 2016: Sensors
Hongjun Li, Hao Yin, Xiangwu Gong, Feihong Dong, Baoquan Ren, Yuanzhi He, Jingchao Wang
This paper investigates the performance of integrated wireless sensor and multibeam satellite networks (IWSMSNs) under terrestrial interference. The IWSMSNs constitute sensor nodes (SNs), satellite sinks (SSs), multibeam satellite and remote monitoring hosts (RMHs). The multibeam satellite covers multiple beams and multiple SSs in each beam. The SSs can be directly used as SNs to transmit sensing data to RMHs via the satellite, and they can also be used to collect the sensing data from other SNs to transmit to the RMHs...
October 14, 2016: Sensors
Boyang Li, Yifan Jiang, Jingxuan Sun, Lingfeng Cai, Chih-Yung Wen
In the development of beyond-line-of-sight (BLOS) Unmanned Aerial Vehicle (UAV) systems, communication between the UAVs and the ground control station (GCS) is of critical importance. The commonly used economical wireless modules are restricted by the short communication range and are easily blocked by obstacles. The use of a communication relay system provides a practical way to solve these problems, improving the performance of UAV communication in BLOS and cross-obstacle operations. In this study, a communication relay system, in which a quadrotor was used to relay radio communication for another quadrotor was developed and tested...
October 13, 2016: Sensors
Jianhang Liu, Wenbin Zhang, Qi Wang, Shibao Li, Haihua Chen, Xuerong Cui, Yi Sun
Cooperative downloading is one of the effective methods to improve the amount of downloaded data in vehicular ad hoc networking (VANET). However, the poor channel quality and short encounter time bring about a high packet loss rate, which decreases transmission efficiency and fails to satisfy the requirement of high quality of service (QoS) for some applications. Digital fountain code (DFC) can be utilized in the field of wireless communication to increase transmission efficiency. For cooperative forwarding, however, processing delay from frequent coding and decoding as well as single feedback mechanism using DFC cannot adapt to the environment of VANET...
October 12, 2016: Sensors
Meihua Jin, Ji-Young Jung, Jung-Ryun Lee
With the arrival of the era of Internet of Things (IoT), Wi-Fi Direct is becoming an emerging wireless technology that allows one to communicate through a direct connection between the mobile devices anytime, anywhere. In Wi-Fi Direct-based IoT networks, all devices are categorized by group of owner (GO) and client. Since portability is emphasized in Wi-Fi Direct devices, it is essential to control the energy consumption of a device very efficiently. In order to avoid unnecessary power consumed by GO, Wi-Fi Direct standard defines two power-saving methods: Opportunistic and Notice of Absence (NoA) power-saving methods...
October 12, 2016: Sensors
Steven Steinhubl
Despite having the basic tools necessary to appropriately identify and manage individuals with hypertension for over half a century it remains the single greatest contributing risk factor to morbidity and mortality worldwide today. Since diagnosis and effective treatment availability are not issues, this major failing in care can be attributed to inadequate systems of care: systems that have led to only <20% of hypertensive individuals globally having their blood pressure adequately controlled. Even in the US, where it is one of the most common reasons for a primary care visit, and with over $42...
September 2016: Journal of Hypertension
Jing Zhang, Lei Sun, Yu Liu, Hongyi Wang, Ningling Sun, Jia Yu, Yao He, Sijin Yan, Puhong Zhang
OBJECTIVE: To evaluate the feasibility and acceptability of a mobile device based electronical data capture (mEDC) system applied in one randomized clinical trial (RCT). DESIGN AND METHOD: The mEDC, an android smartphone-based application, was developed to support real-time data capture, project management and quality control in a multicenter randomized double-blinded parallel controlled pharmaceutical trial. Four user interfaces are shown in Figure 1. The RCT is to evaluate the efficacy of telmisartan (40mg) and hydrochlorothiazide (25mg) monotherapy in high sodium intake patients with mild to moderate hypertension in 14 hospitals, including one baseline survey and three follow-ups...
September 2016: Journal of Hypertension
Seung Woo Park
Rapid progress of mobile information technologies such as wearable sensors, wireless communication, and world-wide use of smartphone cause digital health innovations. In the field of hypertension, wearable blood pressure (BP) monitoring and its wireless transfer to anywhere through smartphone, mobile smartphone apps, and cuffless blood pressure monitoring system are expected to change the way of diagnosis and management of hypertension. Home BP monitoring would be easier and wireless data transfer to health care providers would be common...
September 2016: Journal of Hypertension
Jarkko Harju, Antti Vehkaoja, Ville Lindroos, Pekka Kumpulainen, Sasu Liuhanen, Arvi Yli-Hankala, Niku Oksala
Alterations in arterial blood oxygen saturation, heart rate (HR), and respiratory rate (RR) are strongly associated with intra-hospital cardiac arrests and resuscitations. A wireless, easy-to-use, and comfortable method for monitoring these important clinical signs would be highly useful. We investigated whether the Nellcor™ OxiMask MAX-FAST forehead sensor could provide data for vital sign measurements when located at the distal forearm instead of its intended location at the forehead to provide improved comfortability and easy placement...
October 17, 2016: Journal of Clinical Monitoring and Computing
Panca Dewi Pamungkasari, Yukitoshi Sanada
Time domain cyclic-selective mapping (TDC-SLM) reduces the peak-to-average power ratio (PAPR) in OFDM systems while the amounts of cyclic shifts are required to recover the transmitted signal in a receiver. One of the critical issues of the SLM scheme is sending the side information (SI) which reduces the throughputs in wireless OFDM systems. The proposed scheme implements delayed correlation and matched filtering (DC-MF) to estimate the amounts of the cyclic shifts in the receiver. In the proposed scheme, the DC-MF is placed after the frequency domain equalization (FDE) to improve the accuracy of cyclic shift estimation...
2016: International Scholarly Research Notices
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