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https://www.readbyqxmd.com/read/28212328/differential-characteristics-based-iterative-multiuser-detection-for-wireless-sensor-networks
#1
Xiaoguang Chen, Xu Jiang, Zhilu Wu, Shufeng Zhuang
High throughput, low latency and reliable communication has always been a hot topic for wireless sensor networks (WSNs) in various applications. Multiuser detection is widely used to suppress the bad effect of multiple access interference in WSNs. In this paper, a novel multiuser detection method based on differential characteristics is proposed to suppress multiple access interference. The proposed iterative receive method consists of three stages. Firstly, a differential characteristics function is presented based on the optimal multiuser detection decision function; then on the basis of differential characteristics, a preliminary threshold detection is utilized to find the potential wrongly received bits; after that an error bit corrector is employed to correct the wrong bits...
February 16, 2017: Sensors
https://www.readbyqxmd.com/read/28212322/detection-of-salmonella-typhimurium-on-spinach-using-phage-based-magnetoelastic-biosensors
#2
Fengen Wang, Shin Horikawa, Jiajia Hu, Howard C Wikle, I-Hsuan Chen, Songtao Du, Yuzhe Liu, Bryan A Chin
Phage-based magnetoelastic (ME) biosensors have been studied as an in-situ, real-time, wireless, direct detection method of foodborne pathogens in recent years. This paper investigates an ME biosensor method for the detection of Salmonella Typhimurium on fresh spinach leaves. A procedure to obtain a concentrated suspension of Salmonella from contaminated spinach leaves is described that is based on methods outlined in the U.S. FDA Bacteriological Analytical Manual for the detection of Salmonella on leafy green vegetables...
February 16, 2017: Sensors
https://www.readbyqxmd.com/read/28212281/energy-based-acoustic-source-localization-methods-a-survey
#3
Wei Meng, Wendong Xiao
Energy-based source localization is an important problem in wireless sensor networks (WSNs), which has been studied actively in the literature. Numerous localization algorithms, e.g., maximum likelihood estimation (MLE) and nonlinear-least-squares (NLS) methods, have been reported. In the literature, there are relevant review papers for localization in WSNs, e.g., for distance-based localization. However, not much work related to energy-based source localization is covered in the existing review papers. Energy-based methods are proposed and specially designed for a WSN due to its limited sensor capabilities...
February 15, 2017: Sensors
https://www.readbyqxmd.com/read/28212152/an-update-on-small-bowel-endoscopy
#4
Hey-Long Ching, Mark E McAlindon, Reena Sidhu
PURPOSE OF REVIEW: The breakthrough success of capsule endoscopy and device-assisted enteroscopy has inspired researchers to test and push the boundary of these technologies. The authors herein summarize the latest and most significant studies with clinical impact. RECENT FINDINGS: Competing capsule endoscopy models have enriched the platform of this wireless device. The role of capsule endoscopy in Crohn's disease is expanding as we learn more of the significance of disease distribution and response to treatment...
February 15, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28212096/system-level-design-of-a-64-channel-low-power-neural-spike-recording-sensor
#5
Manuel Delgado-Restituto, Alberto Rodriguez-Perez, Angela Darie, Cristina Soto-Sanchez, Eduardo Fernandez-Jover, Angel Rodriguez-Vazquez
This paper reports an integrated 64-channel neural spike recording sensor, together with all the circuitry to process and configure the channels, process the neural data, transmit via a wireless link the information and receive the required instructions. Neural signals are acquired, filtered, digitized and compressed in the channels. Additionally, each channel implements an auto-calibration algorithm which individually configures the transfer characteristics of the recording site. The system has two transmission modes; in one case the information captured by the channels is sent as uncompressed raw data; in the other, feature vectors extracted from the detected neural spikes are released...
February 13, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28212074/a-review-of-in-body-biotelemetry-devices-implantables-ingestibles-and-injectables
#6
Asimina Kiourti, Konstantina S Nikita
: We present a review of wireless medical devices that are placed inside the human body to realize many and different sensing and/or stimulating functionalities. METHODS: A critical literature review analysis is conducted focusing on three types of in-body medical devices, i.e., a) devices that are implanted inside the human body (implantables), b) devices that are ingested like regular pills (ingestibles), and c) devices that are injected into the human body via needles (injectables)...
February 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28211858/another-advance-in-wireless-optogenetics
#7
Ellen P Neff
No abstract text is available yet for this article.
February 17, 2017: Lab Animal
https://www.readbyqxmd.com/read/28210974/mobile-health-mhealth-technology-for-the-management-of-hypertension-and-hyperlipidemia-slow-start-but-loads-of-potential
#8
REVIEW
Hasan Rehman, Ayeesha K Kamal, Pamela B Morris, Saleem Sayani, Anwar T Merchant, Salim S Virani
PURPOSE OF REVIEW: Hypertension and hyperlipidemia represent two major risk factors for atherosclerotic cardiovascular disease. Mobile health or mHealth is defined as the use of mobile phone and wireless technologies to support the achievement of health objectives. Management of hypertension, and to some extent hyperlipidemia, has often employed mHealth interventions given lower cost and greater patient engagement compared to traditional methods. These interventions include the use of text messaging, wireless devices, and mobile phone applications...
March 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28208815/a-continuous-object-boundary-detection-and-tracking-scheme-for-failure-prone-sensor-networks
#9
Sajida Imran, Young-Bae Ko
In wireless sensor networks, detection and tracking of continuous natured objects is more challenging owing to their unique characteristics such as uneven expansion and contraction. A continuous object is usually spread over a large area, and, therefore, a substantial number of sensor nodes are needed to detect the object. Nodes communicate with each other as well as with the sink to exchange control messages and report their detection status. The sink performs computations on the received data to estimate the object boundary...
February 13, 2017: Sensors
https://www.readbyqxmd.com/read/28208760/mdaral-a-multi-radio-version-for-the-daral-routing-algorithm
#10
Francisco José Estévez, José María Castillo-Secilla, Jesús González, Joaquín Olivares, Peter Glösekötter
Smart Cities are called to change the daily life of human beings. This concept permits improving the efficiency of our cities in several areas such as the use of water, energy consumption, waste treatment, and mobility both for people as well as vehicles throughout the city. This represents an interconnected scenario in which thousands of embedded devices need to work in a collaborative way both for sensing and modifying the environment properly. Under this scenario, the majority of devices will use wireless protocols for communicating among them, representing a challenge for optimizing the use of the electromagnetic spectrum...
February 9, 2017: Sensors
https://www.readbyqxmd.com/read/28208709/human-exposure-to-electromagnetic-fields-from-parallel-wireless-power-transfer-systems
#11
Feng Wen, Xueliang Huang
The scenario of multiple wireless power transfer (WPT) systems working closely, synchronously or asynchronously with phase difference often occurs in power supply for household appliances and electric vehicles in parking lots. Magnetic field leakage from the WPT systems is also varied due to unpredictable asynchronous working conditions. In this study, the magnetic field leakage from parallel WPT systems working with phase difference is predicted, and the induced electric field and specific absorption rate (SAR) in a human body standing in the vicinity are also evaluated...
February 8, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28208672/assessing-human-activity-in-elderly-people-using-non-intrusive-load-monitoring
#12
José M Alcalá, Jesús Ureña, Álvaro Hernández, David Gualda
The ageing of the population, and their increasing wish of living independently, are motivating the development of welfare and healthcare models. Existing approaches based on the direct heath-monitoring using body sensor networks (BSN) are precise and accurate. Nonetheless, their intrusiveness causes non-acceptance. New approaches seek the indirect monitoring through monitoring activities of daily living (ADLs), which proves to be a suitable solution. ADL monitoring systems use many heterogeneous sensors, are less intrusive, and are less expensive than BSN, however, the deployment and maintenance of wireless sensor networks (WSN) prevent them from a widespread acceptance...
February 11, 2017: Sensors
https://www.readbyqxmd.com/read/28208633/compact-planar-ultrawideband-antennas-with-3-5-5-2-5-8-ghz-triple-band-notched-characteristics-for-internet-of-things-applications
#13
Jian Dong, Qianqian Li, Lianwen Deng
Ultrawideband (UWB) antennas, as core devices in high-speed wireless communication, are widely applied to mobile handsets, wireless sensor networks, and Internet of Things (IoT). A compact printed monopole antenna for UWB applications with triple band-notched characteristics is proposed in this paper. The antenna has a very compact size of 10 x 16 mm2 and is composed of a square slotted radiation patch and a narrow rectangular ground plane on the back of the substrate. First, by etching a pair of inverted T-shaped slots at the bottom of the radiation patch, one notched band at 5-6 GHz for rejecting the Wireless Local Area Network (WLAN) is generated...
February 10, 2017: Sensors
https://www.readbyqxmd.com/read/28208369/traffic-congestion-and-the-lifetime-of-networks-with-moving-nodes
#14
Xianxia Yang, Jie Li, Cunlai Pu, Meichen Yan, Rajput Ramiz Sharafat, Jian Yang, Konstantinos Gakis, Panos M Pardalos
For many power-limited networks, such as wireless sensor networks and mobile ad hoc networks, maximizing the network lifetime is the first concern in the related designing and maintaining activities. We study the network lifetime from the perspective of network science. In our model, nodes are initially assigned a fixed amount of energy moving in a square area and consume the energy when delivering packets. We obtain four different traffic regimes: no, slow, fast, and absolute congestion regimes, which are basically dependent on the packet generation rate...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28205144/recommended-best-practices-for-process-monitoring-instrumentation-in-pharmaceutical-freeze-drying-2017
#15
Steven Nail, Serguei Tchessalov, Evgenyi Shalaev, Arnab Ganguly, Ernesto Renzi, Frank Dimarco, Lindsay Wegiel, Steven Ferris, William Kessler, Michael Pikal, Greg Sacha, Alina Alexeenko, T N Thompson, Cindy Reiter, James Searles, Paul Coiteux
Recommended best practices in monitoring of product status during pharmaceutical freeze drying are presented, focusing on methods that apply to both laboratory and production scale. With respect to product temperature measurement, sources of uncertainty associated with any type of measurement probe are discussed, as well as important differences between the two most common types of temperature-measuring instruments-thermocouples and resistance temperature detectors (RTD). Two types of pressure transducers are discussed-thermal conductivity-type gauges and capacitance manometers, with the Pirani gauge being the thermal conductivity-type gauge of choice...
February 15, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28199321/quasistatic-cavity-resonance-for-ubiquitous-wireless-power-transfer
#16
Matthew J Chabalko, Mohsen Shahmohammadi, Alanson P Sample
Wireless power delivery has the potential to seamlessly power our electrical devices as easily as data is transmitted through the air. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and un-aided charging. We introduce quasistatic cavity resonance (QSCR), which can enable purpose-built structures, such as cabinets, rooms, and warehouses, to generate quasistatic magnetic fields that safely deliver kilowatts of power to mobile receivers contained nearly anywhere within...
2017: PloS One
https://www.readbyqxmd.com/read/28198059/gigahertz-electromagnetic-structures-via-direct-ink-writing-for-radio-frequency-oscillator-and-transmitter-applications
#17
Nanjia Zhou, Chengye Liu, Jennifer A Lewis, Donhee Ham
Radio-frequency (RF) electronics, which combine passive electromagnetic devices and active transistors to generate and process gigahertz (GHz) signals, provide a critical basis of ever-pervasive wireless networks. While transistors are best realized by top-down fabrication, relatively larger electromagnetic passives are within the reach of printing techniques. Here, direct writing of viscoelastic silver-nanoparticle inks is used to produce a broad array of RF passives operating up to 45 GHz. These include lumped devices such as inductors and capacitors, and wave-based devices such as transmission lines, their resonant networks, and antennas...
February 15, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28195836/understanding-nurses-strategies-to-handle-un-wanted-nurse-calls-a-resilience-perspective
#18
Joakim Klemets, Tor Erik Evjemo
Nurse calls in a hospital can constitute either positive or negative (wanted or unwanted) interruptions depending on various factors. This study aims to understand nurses' strategies in facilitating the reception of wanted nurse calls and the restriction of unwanted nurse calls. Applying a resilience engineering perspective, nurses' performance variability is investigated as a basis to design appropriate computer support to enhance efficiency and patient safety. A qualitative case study was conducted for a period of 4 years with focus on nurses' use of a wireless nurse call system at a Norwegian university hospital...
February 13, 2017: Computers, Informatics, Nursing: CIN
https://www.readbyqxmd.com/read/28192504/compact-circularly-polarized-truncated-square-ring-slot-antenna-with-suppressed-higher-resonances
#19
Mursyidul Idzam Sabran, Sharul Kamal Abdul Rahim, Chee Yen Leow, Ping Jack Soh, Beng Wah Chew, Guy A E Vandenbosch
This paper presents a compact circularly polarized (CP) antenna with an integrated higher order harmonic rejection filter. The proposed design operates within the ISM band of 2.32 GHz- 2.63 GHz and is suitable for example for wireless power transfer applications. Asymmetrical truncated edges on a square ring create a defected ground structure to excite the CP property, simultaneously realizing compactness. It offers a 50.5% reduced patch area compared to a conventional design. Novel stubs and slot shapes are integrated in the transmission line to reduce higher (up to the third) order harmonics...
2017: PloS One
https://www.readbyqxmd.com/read/28191324/effect-of-logarithmic-and-linear-frequency-scales-on-parametric-modelling-of-tissue-dielectric-data
#20
Saqib Salahuddin, Emily Porter, Paul M Meaney, Martin O'Halloran
The dielectric properties of biological tissues have been studied widely over the past half-century. These properties are used in a vast array of applications, from determining the safety of wireless telecommunication devices to the design and optimisation of medical devices. The frequency-dependent dielectric properties are represented in closed-form parametric models, such as the Cole-Cole model, for use in numerical simulations which examine the interaction of electromagnetic (EM) fields with the human body...
February 2017: Biomedical Physics & Engineering Express
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