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https://www.readbyqxmd.com/read/28930146/co%C3%A2-sensing-characteristics-of-a-la%C3%A2-o%C3%A2-sno%C3%A2-stacked-structure-with-micromachined-hotplates
#1
Tatsuya Iwata, Kyosuke Matsuda, Kazuhiro Takahashi, Kazuaki Sawada
Demand for the detection of carbon dioxide (CO 2 ) is increasing in various fields, including air-quality monitoring, healthcare, and agriculture. On the other hand, smart gas sensors, in which micromachined gas sensors are integrated with driving circuits, are desirable toward the development of the society of the internet of things. In this study, micromachined hotplate-based CO 2 sensors were fabricated and their characteristics were investigated. The sensors have La 2 O 3 /SnO 2 stacked layers as a sensing material and Pt interdigitated electrodes...
September 20, 2017: Sensors
https://www.readbyqxmd.com/read/28925967/enabling-large-scale-iot-based-services-through-elastic-publish-subscribe
#2
Sergio Vavassori, Javier Soriano, Rafael Fernández
In this paper, we report an algorithm that is designed to leverage the cloud as infrastructure to support Internet of Things (IoT) by elastically scaling in/out so that IoT-based service users never stop receiving sensors' data. This algorithm is able to provide an uninterrupted service to end users even during the scaling operation since its internal state repartitioning is transparent for publishers or subscribers; its scaling operation is time-bounded and depends only on the dimension of the state partitions to be transmitted to the different nodes...
September 19, 2017: Sensors
https://www.readbyqxmd.com/read/28895914/a-24-ghz-front-end-integrated-on-a-multilayer-cellulose-based-substrate-for-doppler-radar-sensors
#3
Federico Alimenti, Valentina Palazzi, Chiara Mariotti, Marco Virili, Giulia Orecchini, Stefania Bonafoni, Luca Roselli, Paolo Mezzanotte
This paper presents a miniaturized Doppler radar that can be used as a motion sensor for low-cost Internet of things (IoT) applications. For the first time, a radar front-end and its antenna are integrated on a multilayer cellulose-based substrate, built-up by alternating paper, glue and metal layers. The circuit exploits a distributed microstrip structure that is realized using a copper adhesive laminate, so as to obtain a low-loss conductor. The radar operates at 24 GHz and transmits 5 mW of power. The antenna has a gain of 7...
September 12, 2017: Sensors
https://www.readbyqxmd.com/read/28892103/internet-of-things-sensing-without-power
#4
Vladimir A Aksyuk
No abstract text is available yet for this article.
September 11, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28891928/high-performance-wireless-ammonia-gas-sensors-based-on-reduced-graphene-oxide-and-nano-silver-ink-hybrid-material-loaded-on-a-patch-antenna
#5
Bian Wu, Xingfei Zhang, Beiju Huang, Yutong Zhao, Chuantong Cheng, Hongda Chen
Reduced graphene oxide (rGO) has been studied as a resistive ammonia gas sensor at room temperature. The sensitive hybrid material composed of rGO and nano-silver ink (Ag-ink) was loaded on a microstrip patch antenna to realize high-performance wireless ammonia sensors. The material was investigated using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Firstly, interdigital electrodes (IDEs) printed on the polyethylene terephthalate (PET) by direct printing were employed to measure the variation of resistance of the sensitive material with the ammonia concentration...
September 9, 2017: Sensors
https://www.readbyqxmd.com/read/28891295/localized-surface-plasmon-resonance-mediated-charge-trapping-detrapping-for-core-shell-nanorod-based-optical-memory-cells
#6
Li Zhou, Su-Ting Han, Shiwei Shu, Jiaqing Zhuang, Yan Yan, Qi-Jun Sun, Ye Zhou, V A L Roy
For following the trend of miniaturization as per Moore's law, increasing efforts have been made to develop single devices with versatile functionalities for Internet of Things (IoT). In this work, organic optical memory devices with excellent dual optoelectronic functionality including light sensing and data storage have been proposed. The Au@Ag core-shell nanorods (NRs)-based memory device exhibits large memory window up to 19.7 V due to the well-controlled morphology of Au@Ag NRs with optimum size and concentration...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28891294/low-power-consumption-gas-sensor-created-from-silicon-nanowires-tio2-core-shell-heterojunctions
#7
Dong Liu, Leimiao Lin, Qiaofen Chen, Hongzhi Zhou, Jianmin Wu
Silicon nanowires/TiO2 (SiNWs/TiO2) array with core-shell nanostructure was created by sol-gel and drop-casting methods. The hybrid material displayed excellent sensing performance for CH4 detection at room temperature. The chemiresistor sensor has a linear response towards CH4 gas in 30 ~ 120 ppm range with a detection limit of 20 ppm, which is well below most of CH4 sensors reported before. The enhanced gas sensing performance at room temperature was attributed to the creation of heterojunctions that form a depletion layer at the interface of SiNWs and TiO2 layer...
September 11, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28885186/high-speed-true-random-number-generation-based-on-paired-memristors-for-security-electronics
#8
Teng Zhang, Minghui Yin, Changmin Xu, Xiayan Lu, Xinhao Sun, Yuchao Yang, Ru Huang
True random number generator (TRNG) is a critical component in hardware security that is increasingly important in the era of mobile computing and Internet of Things. Here we demonstrate a TRNG using intrinsic variation of memristors as a natural source of entropy that is otherwise undesirable in most applications. The random bits were produced by cyclically switching a pair of tantalum oxide based memristors and comparing their resistance values in the off state, taking advantage of the more pronounced resistance variation compared with that in the on state...
September 8, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28880252/bmrc-a-bitmap-based-maximum-range-counting-approach-for-temporal-data-in-sensor-monitoring-networks
#9
Bin Cao, Wangyuan Chen, Ying Shen, Chenyu Hou, Jung Yoon Kim, Lifeng Yu
Due to the rapid development of the Internet of Things (IoT), many feasible deployments of sensor monitoring networks have been made to capture the events in physical world, such as human diseases, weather disasters and traffic accidents, which generate large-scale temporal data. Generally, the certain time interval that results in the highest incidence of a severe event has significance for society. For example, there exists an interval that covers the maximum number of people who have the same unusual symptoms, and knowing this interval can help doctors to locate the reason behind this phenomenon...
September 7, 2017: Sensors
https://www.readbyqxmd.com/read/28880227/providing-personalized-energy-management-and-awareness-services-for-energy-efficiency-in-smart-buildings
#10
Eleni Fotopoulou, Anastasios Zafeiropoulos, Fernando Terroso-Sáenz, Umutcan Şimşek, Aurora González-Vidal, George Tsiolis, Panagiotis Gouvas, Paris Liapis, Anna Fensel, Antonio Skarmeta
Considering that the largest part of end-use energy consumption worldwide is associated with the buildings sector, there is an inherent need for the conceptualization, specification, implementation, and instantiation of novel solutions in smart buildings, able to achieve significant reductions in energy consumption through the adoption of energy efficient techniques and the active engagement of the occupants. Towards the design of such solutions, the identification of the main energy consuming factors, trends, and patterns, along with the appropriate modeling and understanding of the occupants' behavior and the potential for the adoption of environmentally-friendly lifestyle changes have to be realized...
September 7, 2017: Sensors
https://www.readbyqxmd.com/read/28878437/randomized-controlled-trial-for-assessment-of-internet-of-things-system-to-guide-intensive-glucose-control-in-diabetes-outpatients-nagoya-health-navigator-study-protocol
#11
Takeshi Onoue, Motomitsu Goto, Tomoko Kobayashi, Takashi Tominaga, Masahiko Ando, Hiroyuki Honda, Yasuko Yoshida, Takahiro Tosaki, Hisashi Yokoi, Sawako Kato, Shoichi Maruyama, Hiroshi Arima
The Internet of Things (IoT) allows collecting vast amounts of health-relevant data such as daily activity, body weight (BW), and blood pressure (BP) automatically. The use of IoT devices to monitor diabetic patients has been studied, but could not evaluate IoT-dependent effects because health data were not measured in control groups. This multicenter, open-label, randomized, parallel group study will compare the impact of intensive health guidance using IoT and conventional medical guidance on glucose control...
August 2017: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/28876901/flexible-graphene-based-wearable-gas-and-chemical-sensors
#12
Eric Singh, M Meyyappan, Hari S Nalwa
Wearable electronics is expected to be one of the most active research areas in the next decade, therefore, nanomaterials possessing high carrier mobility, optical transparency, mechanical robustness and flexibility, light-weight, and environmental stability will be in immense demand. Graphene is one of the nanomaterials that fulfill all these requirements, along with other inherently unique properties and convenience to fabricate into different morphological nanostructures, from atomically thin single layers to nanoribbons...
September 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28873815/an-innovative-speech-based-user-interface-for-smarthomes-and-iot-solutions-to-help-people-with-speech-and-motor-disabilities
#13
Massimiliano Malavasi, Enrico Turri, Jose Joaquin Atria, Heidi Christensen, Ricard Marxer, Lorenzo Desideri, Andre Coy, Fabio Tamburini, Phil Green
A better use of the increasing functional capabilities of home automation systems and Internet of Things (IoT) devices to support the needs of users with disability, is the subject of a research project currently conducted by Area Ausili (Assistive Technology Area), a department of Polo Tecnologico Regionale Corte Roncati of the Local Health Trust of Bologna (Italy), in collaboration with AIAS Ausilioteca Assistive Technology (AT) Team. The main aim of the project is to develop experimental low cost systems for environmental control through simplified and accessible user interfaces...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28873781/wireless-as-enabler-of-innovation-in-21
#14
Eddie Ball, Athanasios Vasileiadis
This paper overviews new and emerging wireless technologies that could positively impact on the lives of the elderly or disabled, as Social Care users of Assistive Technology (AT) for 'independent living'. Novel Internet of Things (IoT) radio systems and wireless locating systems being researched at The University of Sheffield are discussed in the context of Social Care technology use-cases.
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28869540/secure-communications-in-ciot-networks-with-a-wireless-energy-harvesting-untrusted-relay
#15
Hequn Hu, Zhenzhen Gao, Xuewen Liao, Victor C M Leung
The Internet of Things (IoT) represents a bright prospect that a variety of common appliances can connect to one another, as well as with the rest of the Internet, to vastly improve our lives. Unique communication and security challenges have been brought out by the limited hardware, low-complexity, and severe energy constraints of IoT devices. In addition, a severe spectrum scarcity problem has also been stimulated by the use of a large number of IoT devices. In this paper, cognitive IoT (CIoT) is considered where an IoT network works as the secondary system using underlay spectrum sharing...
September 4, 2017: Sensors
https://www.readbyqxmd.com/read/28869508/an-effective-semantic-event-matching-system-in-the-internet-of-things-iot-environment
#16
Noura Alhakbani, Mohammed Mehedi Hassan, Mourad Ykhlef
IoT sensors use the publish/subscribe model for communication to benefit from its decoupled nature with respect to space, time, and synchronization. Because of the heterogeneity of communicating parties, semantic decoupling is added as a fourth dimension. The added semantic decoupling complicates the matching process and reduces its efficiency. Our proposed algorithm clusters subscriptions and events according to topic and performs the matching process within these clusters, which increases the throughput by reducing the matching time from the range of 16-18 ms to 2-4 ms...
September 2, 2017: Sensors
https://www.readbyqxmd.com/read/28862675/prediction-based-energy-saving-mechanism-in-3gpp-nb-iot-networks
#17
Jinseong Lee, Jaiyong Lee
The current expansion of the Internet of things (IoT) demands improved communication platforms that support a wide area with low energy consumption. The 3rd Generation Partnership Project introduced narrowband IoT (NB-IoT) as IoT communication solutions. NB-IoT devices should be available for over 10 years without requiring a battery replacement. Thus, a low energy consumption is essential for the successful deployment of this technology. Given that a high amount of energy is consumed for radio transmission by the power amplifier, reducing the uplink transmission time is key to ensure a long lifespan of an IoT device...
September 1, 2017: Sensors
https://www.readbyqxmd.com/read/28859008/leveraging-the-internet-of-things-to-transform-care-delivery
#18
Joyce Sensmeier
No abstract text is available yet for this article.
October 2017: Nursing Administration Quarterly
https://www.readbyqxmd.com/read/28858243/cooperation-techniques-between-lte-in-unlicensed-spectrum-and-wi-fi-towards-fair-spectral-efficiency
#19
Vasilis Maglogiannis, Dries Naudts, Adnan Shahid, Spilios Giannoulis, Eric Laermans, Ingrid Moerman
On the road towards 5G, a proliferation of Heterogeneous Networks (HetNets) is expected. Sensor networks are of great importance in this new wireless era, as they allow interaction with the environment. Additionally, the establishment of the Internet of Things (IoT) has incredibly increased the number of interconnected devices and consequently the already massive wirelessly transmitted traffic. The exponential growth of wireless traffic is pushing the wireless community to investigate solutions that maximally exploit the available spectrum...
August 31, 2017: Sensors
https://www.readbyqxmd.com/read/28846608/conditional-variational-autoencoder-for-prediction-and-feature-recovery-applied-to-intrusion-detection-in-iot
#20
Manuel Lopez-Martin, Belen Carro, Antonio Sanchez-Esguevillas, Jaime Lloret
The purpose of a Network Intrusion Detection System is to detect intrusive, malicious activities or policy violations in a host or host's network. In current networks, such systems are becoming more important as the number and variety of attacks increase along with the volume and sensitiveness of the information exchanged. This is of particular interest to Internet of Things networks, where an intrusion detection system will be critical as its economic importance continues to grow, making it the focus of future intrusion attacks...
August 26, 2017: Sensors
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