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https://www.readbyqxmd.com/read/28927004/large-electrocaloric-effect-in-lead-free-ba0-85ca0-15-zr0-1ti0-9-o%C3%A2-ceramics-prepared-via-citrate-route
#1
Jing Shi, Rongfeng Zhu, Xing Liu, Bijun Fang, Ningyi Yuan, Jianning Ding, Haosu Luo
The 1 wt % Li-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O₃ (BCZT-Li) ceramics prepared by the citrate method exhibit improved phase purity, densification and electrical properties, which provide prospective possibility to develop high-performance electrocaloric materials. The electrocaloric effect was evaluated by phenomenological method, and the BCZT-Li ceramics present large electrocaloric temperature change ∆T, especially large electrocaloric responsibility ξ = ∆Tmax/∆Emax, which can be comparable to the largest values reported in the lead-free piezoelectric ceramics...
September 18, 2017: Materials
https://www.readbyqxmd.com/read/28926989/tech-savvy-beef-cattle-how-heifers-respond-to-moving-virtual-fence-lines
#2
Dana L M Campbell, Jim M Lea, William J Farrer, Sally J Haynes, Caroline Lee
Global Positioning System (GPS)-based virtual fences offer the potential to improve the management of grazing animals. Prototype collar devices utilising patented virtual fencing algorithms were placed on six Angus heifers in a 6.15 hectare paddock. After a "no fence" period, sequential, shifting virtual fences restricted the animals to 40%, 60%, and 80% of the paddock area widthways and 50% lengthways across 22 days. Audio cues signaled the virtual boundary, and were paired with electrical stimuli if the animals continued forward into the boundary...
September 18, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/28926957/combining-a-multi-agent-system-and-communication-middleware-for-smart-home-control-a-universal-control-platform-architecture
#3
Song Zheng, Qi Zhang, Rong Zheng, Bi-Qin Huang, Yi-Lin Song, Xin-Chu Chen
In recent years, the smart home field has gained wide attention for its broad application prospects. However, families using smart home systems must usually adopt various heterogeneous smart devices, including sensors and devices, which makes it more difficult to manage and control their home system. How to design a unified control platform to deal with the collaborative control problem of heterogeneous smart devices is one of the greatest challenges in the current smart home field. The main contribution of this paper is to propose a universal smart home control platform architecture (IAPhome) based on a multi-agent system and communication middleware, which shows significant adaptability and advantages in many aspects, including heterogeneous devices connectivity, collaborative control, human-computer interaction and user self-management...
September 16, 2017: Sensors
https://www.readbyqxmd.com/read/28926952/medium-access-control-protocols-for-cognitive-radio-ad-hoc-networks-a-survey
#4
REVIEW
Mahdi Zareei, A K M Muzahidul Islam, Sabariah Baharun, Cesar Vargas-Rosales, Leyre Azpilicueta, Nafees Mansoor
New wireless network paradigms will demand higher spectrum use and availability to cope with emerging data-hungry devices. Traditional static spectrum allocation policies cause spectrum scarcity, and new paradigms such as Cognitive Radio (CR) and new protocols and techniques need to be developed in order to have efficient spectrum usage. Medium Access Control (MAC) protocols are accountable for recognizing free spectrum, scheduling available resources and coordinating the coexistence of heterogeneous systems and users...
September 16, 2017: Sensors
https://www.readbyqxmd.com/read/28926864/-thermochemotherapy-with-mitomycin-c-an-update-on-alternative-treatment-strategies-in-non-muscleinvasive-bladder-cancer
#5
Frank Christoph, Frank König, Stefan Lebentrau, Simon Blaschke, Uwe-Bernd Liehr, Martin Schostak
Bladder cancer is the second most common urological malignant disease. There are various treatment strategies which, depending on tumor stage and grade, can minimize recurrence and lower progression rate. Alternative treatment modalities of instillation therapy after failure with first line Mitomycin C or BCG do exist and have become a point of interest, especially in times of shortage of agents such as BCG.This article aims to give an overview of the current existing thermotherapeutic treatment options (electroinductive and electroconductive)...
September 19, 2017: Aktuelle Urologie
https://www.readbyqxmd.com/read/28926855/a-comparison-of-the-efficacy-of-once-daily-fluticasone-furoate-vilanterole-with-twice-daily-fluticasone-propionate-salmeterol-in-elderly-asthmatics
#6
Yoshihisa Ishiura, Masaki Fujimura, Yasutaka Shiba, Noriyuki Ohkura, Johsuke Hara, Miki Abo, Kazuo Kasahara
Background Asthma in the elderly population has been focused because it affects quality of life and results in a higher hospitalization rate and mortality. Fluticasone furoate (FF)/vilanterole (VI) is a novel inhaled corticosteroids (ICS)/long-acting β2 agonist (LABA) combination being developed for once-daily administration for asthma with greater anti-inflammatory activity and longer duration of bronchidilation. The Ellipta(TM) dry powder inhaler (DPI) has also been available as a new device with high levels of satisfaction and preference...
September 19, 2017: Drug Research
https://www.readbyqxmd.com/read/28926828/are-all-amplitude-integrated-electroencephalogram-systems-equal
#7
Tobias Werther, Monika Olischar, Gunnar Naulaers, Philipp Deindl, Katrin Klebermass-Schrehof, Nathan Stevenson
BACKGROUND: Filter and peak detection algorithms implemented in amplitude-integrated electroencephalogram (aEEG) systems are not standardized. New aEEG systems are continuously enriching the market and clinicians are faced with different aEEG devices whose tracings may vary. OBJECTIVES: The aim of this work was to determine the role of different aEEG systems on quantitative measurements of the aEEG. METHODS: In this observational study, a single-channel aEEG recording (Olympic CFM 6000) with corresponding EEG signal was obtained from 32 infants at a gestational age of 36-44 weeks...
September 20, 2017: Neonatology
https://www.readbyqxmd.com/read/28926723/porous-wo3-graphene-polyester-textile-electrode-materials-with-enhanced-electrochemical-performance-for-flexible-solid-state-supercapacitors
#8
Li-Na Jin, Ping Liu, Chun Jin, Jia-Nan Zhang, Shao-Wei Bian
In this work, a flexible and porous WO3/grapheme/polyester (WO3/G/PT) textile electrode was successfully prepared by in situ growing WO3 on the fiber surface inside G/PT composite fabrics. The unique electrode structure facilitates to enhance the energy storage performance because the 3D conductive network constructed by the G/PT increase the electron transportation rate, nanotructured WO3 exposed enhanced electrochemically active surface area and the hierarchically porous structure improved the electrolyte ion diffusion rate...
September 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28926715/optical-forging-of-graphene-into-three-dimensional-shapes
#9
Andreas Johansson, Pasi Myllyperkiö, Pekka Koskinen, Jukka Aumanen, Juha Tapio Koivistoinen, Hung-Chieh Tsai, Chia-Hao Chen, Lo-Yueh Chang, Vesa-Matti Hiltunen, Jyrki Manninen, Wei-Yen Woon, Mika Pettersson
Atomically thin materials, such as graphene, are the ultimate building blocks for nanoscale devices. But although their synthesis and handling today are routine, all efforts thus far have been restricted to flat natural geometries, since the means to control their three-dimensional (3D) morphology has remained elusive. Here we show that, just as a blacksmith uses a hammer to forge a metal sheet into 3D shapes, a pulsed laser beam can forge graphene sheet into controlled 3D shapes in the nanoscale. The forging mechanism is based on laser-induced local expansion of graphene, as confirmed by computer simulations using thin sheet elasticity theory...
September 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28926691/cobalt-porphyrin-thiazyl-radical-coordination-polymers-towards-metal-organic-electronics
#10
Delia A Haynes, Laura J van Laeren, Orde Q Munro
Herein we delineate an unusual one-dimensional coordination polymer (CP), 3, prepared from S = ½ Co(TPP), 1, (TPP = 5,10,15,20-tetraphenylporphyrin dianion) and S = ½ 4-(4'-pyridyl)-1,2,3,5-dithiadiazolyl (py-DTDA) radical, 2. The atypically long S-S distance for CP 3 (2.12 Å) reflects fractional electron transfer from the formally Co(II) ion into the antibonding π-SOMO of the metal-bound py-DTDA bridging ligand. The bonding in solid CP 3 involves non-integer redox states in a resonance hybrid repeat unit best formulated as [Co(TPP)](0...
September 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28926685/nir-absorbing-metal-free-organic-porphyrin-and-phthalocyanine-dyes-for-panchromatic-dscs
#11
Phillip Brogdon, Hammad Cheema, Jared Heath Delcamp
Dye-sensitized solar cells (DSCs) are a promising source of renewable energy. However, power conversion efficiency (PCE) of devices has been limited largely by the difficulty of producing electricity using photons from the near-infrared (NIR) spectral region. Metal-free organic sensitizers frequently employ strong electron donating or withdrawing moieties to tune the optical band gap to allow the absorption of lower energy wavelengths in charge transfer systems while porphyrins and phthalocyanines use substituents to shift the Soret and Q bands toward lower energy absorption...
September 19, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28926626/do-privacy-and-security-regulations-need-a-status-update-perspectives-from-an-intergenerational-survey
#12
Stacey Pereira, Jill Oliver Robinson, Hayley A Peoples, Amanda M Gutierrez, Mary A Majumder, Amy L McGuire, Mark A Rothstein
BACKGROUND: The importance of health privacy protections in the era of the "Facebook Generation" has been called into question. The ease with which younger people share personal information about themselves has led to the assumption that they are less concerned than older generations about the privacy of their information, including health information. We explored whether survey respondents' views toward health privacy suggest that efforts to strengthen privacy protections as health information is moved online are unnecessary...
2017: PloS One
https://www.readbyqxmd.com/read/28926613/human-in-the-loop-bayesian-optimization-of-wearable-device-parameters
#13
Myunghee Kim, Ye Ding, Philippe Malcolm, Jozefien Speeckaert, Christoper J Siviy, Conor J Walsh, Scott Kuindersma
The increasing capabilities of exoskeletons and powered prosthetics for walking assistance have paved the way for more sophisticated and individualized control strategies. In response to this opportunity, recent work on human-in-the-loop optimization has considered the problem of automatically tuning control parameters based on realtime physiological measurements. However, the common use of metabolic cost as a performance metric creates significant experimental challenges due to its long measurement times and low signal-to-noise ratio...
2017: PloS One
https://www.readbyqxmd.com/read/28926362/validation-of-the-pangao-pg-800a36-automatic-wrist-blood-pressure-monitor-according-to-the-european-society-of-hypertension-and-the-british-hypertension-society-protocols
#14
Hairong Zhao, Weichang Qiao, Rui Zhang, Peng Cui, Fanglin Hou, Wenli Zhang
OBJECTIVE: The aim of this study was to validate the PG-800A36 automatic wrist blood pressure monitor according to the European Society of Hypertension International Protocol (ESH-IP) revision 2010 and the British Hypertension Society (BHS) protocols. PARTICIPANTS AND METHODS: A total of 33 participants were initially included on the basis of the ESH-IP, followed by examination of 85 participants according to the BHS protocol. The procedures and analysis methods of the protocols were followed precisely with left arm/wrist sequential measurements by two trained observers using a mercury sphygmomanometer and one supervisor using the device...
September 18, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28926325/-epidemiology-of-internet-use-by-an-adolescent-population-and-its-relation-with-sleep-habits
#15
Carla Ferreira, Helena Ferreira, Maria João Vieira, Mónica Costeira, Liliana Branco, Ângela Dias, Liliana Macedo
INTRODUCTION: In the last decades, the great technological development increased Internet popularity, emerging the concern about its overuse. The objectives of this study were to assess and characterize Internet use in adolescence, determine Internet addiction and clarify its association with sleep disorders and excessive daytime sleepiness. MATERIAL AND METHODS: It was performed an observational, cross sectional and community-based study. The target were students attending 7th and 8th grades, to whom was applied an online self-report questionnaire to assess sociodemographic features, Internet use, Internet dependence, sleep characteristics and excessive daytime sleepiness...
August 31, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28926270/an-ultra-thin-nanoporous-membrane-evaporator
#16
Zhengmao Lu, Kyle L Wilke, Daniel John Preston, Ikuya Kinefuchi, Elizabeth F Chang-Davidson, Evelyn N Wang
Evaporation is a ubiquitous phenomenon found in nature and widely used in industry. Yet fundamental understanding of interfacial transport during evaporation remains limited to date owing to the difficulty of characterizing the heat and mass transfer at the interface, especially at high heat fluxes ( > 100 W/cm(2)). In this work, we elucidated evaporation into an air ambient with an ultra-thin (≈ 200 nm thick) nanoporous (≈ 130 nm pore diameter) membrane. With our evaporator design, we accurately monitored the temperature of the liquid-vapor interface, reduced the thermal-fluidic transport resistance and mitigated the clogging risk associated with contamination...
September 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28926228/facile-synthesis-of-unique-cellulose-triacetate-based-flexible-and-high-performance-gel-polymer-electrolyte-for-lithium-ion-batteries
#17
Trupti Nirmale, Indrapal Karbhal, Ramchandra S Kalubarme, Manjusha V Shelke, Anjani J Varma, Bharat Bhanudas Kale
Lithium ion batteries (LIBs) with polymer based electrolytes have attracted huge attention due to the possibility of fabricating intrinsically safer and flexible devices. However, economical and eco-friendly sustainable technology is an oncoming challenge to fulfill the ever increasing demand. To circumvent this issue, we have developed gel polymer electrolyte (GPE) based on renewable polymers like cellulose triacetate (CTA) and poly (polyethylene glycol methacrylate) p(PEGMA) by using a photo polymerization technique...
September 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28926227/vertically-stacked-and-self-encapsulated-van-der-waals-heterojunction-diodes-using-two-dimensional-layered-semiconductors
#18
Jinshui Miao, Zhihao Xu, Li Qing, Arthur Bowman, Suoming Zhang, Weida Hu, Zhixian Zhou, Chuan Wang
Van der Waals heterojunctions using 2D semiconducting materials could overcome the defect issues included by lattice mismatch in conventional epitaxially-grown heterojunctions with bulk materials and could enable a much wider palette for choice of materials and more sophisticated device design. Such 2D heterojunction devices are of great interest for important functional devices such as diodes, bipolar junction transistors, light-emitting diodes, and photodetectors. In this paper, we demonstrate a truly vertical p-n heterojunction diode built from 2D semiconductors (MoS2 and BP) and compare its performance against conventional lateral 2D heterojunction devices...
September 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28926076/electronic-imitation-of-behavioral-and-psychological-synaptic-activities-using-tiox-al2o3-based-memristor-devices
#19
Writam Banerjee, Qi Liu, Hangbing Lv, Shibing Long, Ming Liu
Seeking an effective electronic synapse to emulate biological synaptic behavior is fundamental for building brain-inspired computers. An emerging two-terminal memristor, in which the conductance can be gradually modulated by external electrical stimuli, is widely considered as the strongest competitor of the electronic synapse. Here, we show the capability of TiOx/Al2O3-based memristor devices to imitate synaptic behaviors. Along with analog resistive switching performances, the devices replicate the bio-synapse behaviors of potentiation/depression, short-term-plasticity, and long-term-potentiation, which show that TiOx/Al2O3-based memristors may be useful as electronic synapses...
September 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28926045/fluorite-type-coordination-compound-as-iodide-ion-conductor-crystal-structure-and-ionic-conductivity
#20
Xin Chen, Chen Xue, Shao-Xian Liu, Jian-Lan Liu, Zhi-Yuan Yao, Xiao-Ming Ren
The solid state electrolytes show a wide range of practical applications in a variety of all-solid-state electrochemical devices, and it is highly in demand to explore new types of solid state electrolyte materials. In this study, we have designed and prepared a fluorite-type coordination compound, [Mn(en)3]I2, which has been characterized by microanalysis for C, H and N elements, infrared spectrum in the wavenumber range of 4000-400 cm(-1), thermogravimetric analysis and differential scanning calorimetry. The single crystal X-ray diffraction revealed that the bigger size [Mn(en)3](2+) cations build three-dimensional network in the crystal of [Mn(en)3]I2 and the smaller size iodide ions occupy the tetrahedral or octahedral cavities surrounded by the [Mn(en)3](2+) cations, featuring as the fluorite-type compound...
September 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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