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https://www.readbyqxmd.com/read/28629165/a-cost-effective-vehicle-localization-solution-using-an-interacting-multiple-model-unscented-kalman-filters-imm-ukf-algorithm-and-grey-neural-network
#1
Qimin Xu, Xu Li, Ching-Yao Chan
In this paper, we propose a cost-effective localization solution for land vehicles, which can simultaneously adapt to the uncertain noise of inertial sensors and bridge Global Positioning System (GPS) outages. First, three Unscented Kalman filters (UKFs) with different noise covariances are introduced into the framework of Interacting Multiple Model (IMM) algorithm to form the proposed IMM-based UKF, termed as IMM-UKF. The IMM algorithm can provide a soft switching among the three UKFs and therefore adapt to different noise characteristics...
June 18, 2017: Sensors
https://www.readbyqxmd.com/read/28629144/n%C3%A2-%C2%BA-gaas-augeni-au-thermocouple-type-rf-mems-power-sensors-based-on-dual-thermal-flow-paths-in-gaas-mmic
#2
Zhiqiang Zhang, Xiaoping Liao
To achieve radio frequency (RF) power detection, gain control, and circuit protection, this paper presents n⁺ GaAs/AuGeNi-Au thermocouple-type RF microelectromechanical system (MEMS) power sensors based on dual thermal flow paths. The sensors utilize a conversion principle of RF power-heat-voltage, where a thermovoltage is obtained as the RF power changes. To improve the heat transfer efficiency and the sensitivity, structures of two heat conduction paths are designed: one in which a thermal slug of Au is placed between two load resistors and hot junctions of the thermocouples, and one in which a back cavity is fabricated by the MEMS technology to form a substrate membrane underneath the resistors and the hot junctions...
June 17, 2017: Sensors
https://www.readbyqxmd.com/read/28623777/method-for-lateral-force-calibration-in-atomic-force-microscope-using-mems-microforce-sensor
#3
Cezary Dziekoński, Wojciech Dera, Dariusz M Jarząbek
In this paper we present a simple and direct method for the lateral force calibration constant determination. Our procedure does not require any knowledge about material or geometrical parameters of an investigated cantilever. We apply a commercially available microforce sensor with advanced electronics for direct measurement of the friction force applied by the cantilever's tip to a flat surface of the microforce sensor measuring beam. Due to the third law of dynamics, the friction force of the equal value tilts the AFM cantilever...
June 14, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28623755/effects-of-adjunctive-lacosamide-on-mood-and-quality-of-life-in-patients-with-epilepsy
#4
Luba Nakhutina, Saroj D Kunnakkat, Madeleine Coleman, Catherine Lushbough, Vanessa Arnedo, Nirali Soni, Arthur C Grant
We examined the effects of adjunctive lacosamide (LCM) on mood and quality of life (QOL) in adult patients with partial-onset seizures in a prospective, controlled, single-blind study. Patients in whom LCM was added to their AED regimen for clinical indications comprised the LCM group (n=18), while the control group (n=32) comprised patients on ≥2 AEDs with anticipated stable dosing for the duration of the study. Profile of Mood States (POMS) and QOLIE-89 were used to assess mood and QOL at enrollment and 12-16weeks later...
June 14, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28614337/dual-axis-optical-coherence-tomography-for-deep-tissue-imaging
#5
Yang Zhao, Will J Eldridge, Jason R Maher, Sanghoon Kim, Michael Crose, Mohamed Ibrahim, Howard Levinson, Adam Wax
We have developed dual-axis optical coherence tomography (DA-OCT) which enables deep tissue imaging by using a novel off-axis illumination/detection configuration. DA-OCT offers a 100-fold speed increase compared with its predecessor, multispectral multiple-scattering low coherence interferometry (ms2/LCI), by using a new beam scanning mechanism based on a microelectro-mechanical system (MEMS) mirror. The data acquisition scheme was altered to take advantage of this scanning speed, producing tomographic images at a rate of 4 frames (B-scans) per second...
June 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28612081/betting-on-transitivity-in-probabilistic-causal-chains
#6
Dennis Hebbelmann, Momme von Sydow
Causal reasoning is crucial to people's decision making in probabilistic environments. It may rely directly on data about covariation between variables (correspondence) or on inferences based on reasonable constraints if larger causal models are constructed based on local relations (coherence). For causal chains an often assumed constraint is transitivity. For probabilistic causal relations, mismatches between such transitive inferences and direct empirical evidence may lead to distortions of empirical evidence...
June 13, 2017: Cognitive Processing
https://www.readbyqxmd.com/read/28605170/pharmacokinetics-based-adherence-measures-for-antiretroviral-therapy-in-hiv-infected-kenyan-children
#7
Wanzhu Tu, Winstone M Nyandiko, Hai Liu, James E Slaven, Michael L Scanlon, Samuel O Ayaya, Rachel C Vreeman
BACKGROUND: Traditional medication adherence measures do not account for the pharmacokinetic (PK) properties of the drugs, potentially misrepresenting true therapeutic exposure. METHODS: In a population of HIV-infected Kenyan children on antiretroviral therapy including nevirapine (NVP), we used a one-compartment model with previously established PK parameters and Medication Event Monitoring Systems (MEMS®)-recorded dosing times to estimate the mean plasma concentration of NVP (Cp) in individual patients during 1 month of follow-up...
June 7, 2017: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/28604138/ehealth-technologies-as-an-intervention-to-improve-adherence-to-topical-antipsoriatics-a-systematic-review
#8
Mathias Tiedemann Svendsen, Flemming Andersen, Klaus Ejner Andersen
BACKGROUND: Topical antipsoriatics are recommended first-line treatment of psoriasis, but rates of adherence are low. Patient support by use of electronic health (eHealth) services is suggested to improve medical adherence. OBJECTIVE: To review randomised controlled trials (RCTs) testing eHealth interventions designed to improve adherence to topical antipsoriatics and to review applications for smartphones (apps) incorporating the word psoriasis. MATERIAL AND METHODS: Literature review: Medline, Embase, Cochrane, PsycINFO, and Web of Science were searched using search terms for eHealth, psoriasis and topical antipsoriatics...
June 12, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28601531/sheep-as-a-large-animal-ear-model-middle-ear-ossicular-velocities-and-intracochlear-sound-pressure
#9
Dominik Péus, Ivo Dobrev, Lukas Prochazka, Konrad Thoele, Adrian Dalbert, Andreas Boss, Nicolas Newcomb, Rudolf Probst, Christof Röösli, Jae Hoon Sim, Alexander Huber, Flurin Pfiffner
Animals are frequently used for the development and testing of new hearing devices. Dimensions of the middle ear and cochlea differ significantly between humans and commonly used animals, such as rodents or cats. The sheep cochlea is anatomically more like the human cochlea in size and number of turns. This study investigated the middle-ear ossicular velocities and intracochlear sound pressure (ICSP) in sheep temporal bones, with the aim of characterizing the sheep as an experimental model for implantable hearing devices...
June 7, 2017: Hearing Research
https://www.readbyqxmd.com/read/28601326/direct-peritoneal-resuscitation-improves-mesenteric-perfusion-by-nitric-oxide-dependent-pathways
#10
Sina Khaneki, Amanda R Jensen, Natalie A Drucker, Troy A Markel
BACKGROUND: Direct peritoneal resuscitation (DPR) has been shown to increase survival after intestinal ischemia and reperfusion injury (I/R). We have previously appreciated that minimum essential medium (MEM), a synthetic cell culture medium with bovine serum, glutamine, and antibiotics, contributes to these benefits. We hypothesized that (1) DPR using MEM as a dialysate would increase mesenteric perfusion, improve intestinal mucosal injury, and limit intestinal and hepatic inflammation after intestinal I/R and (2) these improvements would be dependent on endothelial nitric oxide pathways...
June 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28596522/enhancing-optical-forces-in-inp-based-waveguides
#11
Mohammad Esmail Aryaee Panah, Elizaveta S Semenova, Andrei V Lavrinenko
Cantilever sensors are among the most important microelectromechanical systems (MEMS), which are usually actuated by electrostatic forces or piezoelectric elements. Although well-developed microfabrication technology has made silicon the prevailing material for MEMS, unique properties of other materials are overlooked in this context. Here we investigate optically induced forces exerted upon a semi-insulating InP waveguide suspended above a highly doped InP:Si substrate, in three different regimes: the epsilon-near-zero (ENZ), with excitation of surface plasmon polaritons (SPPs) and phonons excitation...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28594384/the-development-of-the-differential-mems-vector-hydrophone
#12
Guojun Zhang, Mengran Liu, Nixin Shen, Xubo Wang, Wendong Zhang
To solve the problem that MEMS vector hydrophones are greatly interfered with by the vibration of the platform and flow noise in applications, this paper describes a differential MEMS vector hydrophone that could simultaneously receive acoustic signals and reject acceleration signals. Theoretical and simulation analyses have been carried out. Lastly, a prototype of the differential MEMS vector hydrophone has been created and tested using a standing wave tube and a vibration platform. The results of the test show that this hydrophone has a high sensitivity, Mv = -185 dB (@ 500 Hz, 0 dB reference 1 V/μPa), which is almost the same as the previous MEMS vector hydrophones, and has a low acceleration sensitivity, Mv = -58 dB (0 dB reference 1 V/g), which has decreased by 17 dB compared with the previous MEMS vector hydrophone...
June 8, 2017: Sensors
https://www.readbyqxmd.com/read/28594350/micro-electromechanical-affinity-sensor-for-the-monitoring-of-glucose-in-bioprocess-media
#13
Lorenz Theuer, Micha Lehmann, Stefan Junne, Peter Neubauer, Mario Birkholz
An affinity-viscometry-based micro-sensor probe for continuous glucose monitoring was investigated with respect to its suitability for bioprocesses. The sensor operates with glucose and dextran competing as binding partner for concanavalin A, while the viscosity of the assay scales with glucose concentration. Changes in viscosity are determined with a micro-electromechanical system (MEMS) in the measurement cavity of the sensor probe. The study aimed to elucidate the interactions between the assay and a typical phosphate buffered bacterial cultivation medium...
June 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28590425/a-capacitance-to-digital-converter-for-mems-sensors-for-smart-applications
#14
Javier Pérez Sanjurjo, Enrique Prefasi, Cesare Buffa, Richard Gaggl
The use of MEMS sensors has been increasing in recent years. To cover all the applications, many different readout circuits are needed. To reduce the cost and time to market, a generic capacitance-to-digital converter (CDC) seems to be the logical next step. This work presents a configurable CDC designed for capacitive MEMS sensors. The sensor is built with a bridge of MEMS, where some of them function with pressure. Then, the capacitive to digital conversion is realized using two steps. First, a switched-capacitor (SC) preamplifier is used to make the capacitive to voltage (C-V) conversion...
June 7, 2017: Sensors
https://www.readbyqxmd.com/read/28588488/antinociceptive-activity-of-borreria-verticillata-in-vivo-and-in-silico-studies
#15
Rosa H M Silva, Nathália de Fátima M Lima, Alberto J O Lopes, Cleydlenne C Vasconcelos, José W C de Mesquita, Ludmilla S S de Mesquita, Fernando C V M Lima, Maria N de S Ribeiro, Ricardo M Ramos, Maria do Socorro de S Cartágenes, João B S Garcia
Borreria verticillata (L.) G. Mey. known vassourinha has antibacterial, antimalarial, hepatoprotective, antioxidative, analgesic, and anti-inflammatory, however, its antinociceptive action requires further studies. Aim of the study evaluated the antinociceptive activity of B. verticillata hydroalcoholic extract (EHBv) and ethyl acetate fraction (FAc) by in vivo and in silico studies. In vivo assessment included the paw edema test, writhing test, formalin test and tail flick test. Wistar rats and Swiss mice were divided into 6 groups and given the following treatments oral: 0...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28587105/internal-model-based-robust-tracking-control-design-for-the-mems-electromagnetic-micromirror
#16
Jiazheng Tan, Weijie Sun, John T W Yeow
The micromirror based on micro-electro-mechanical systems (MEMS) technology is widely employed in different areas, such as scanning, imaging and optical switching. This paper studies the MEMS electromagnetic micromirror for scanning or imaging application. In these application scenarios, the micromirror is required to track the command sinusoidal signal, which can be converted to an output regulation problem theoretically. In this paper, based on the internal model principle, the output regulation problem is solved by designing a robust controller that is able to force the micromirror to track the command signal accurately...
May 26, 2017: Sensors
https://www.readbyqxmd.com/read/28580717/the-development-and-integrity-of-equine-pre-antral-follicles-cultured-in-vitro-with-follicle-stimulating-hormone-fsh-supplementation
#17
M C Max, C B Silva, S M González, A G Lindquist, I Búfalo, R G Gomes, F Morotti, C B Costa, Trr Barreiros, L A Lisboa, M M Seneda
This study investigated the effects of different concentrations of FSH (10, 50, 100 and 200 ng/ml) in supplemented MEM+ on the development of equine pre-antral follicles that were cultured in vitro for 2 or 6 days. The ovaries (n = 5) from mares in seasonal anoestrus were collected from a local abattoir. Ten ovarian tissue fragments of approximately 3 × 3 × 1 mm were obtained from each animal. The fragments were cultured in situ for 2 days (D2) or 6 days (D6) in MEM+ or MEM+ supplemented with FSH at four different concentrations, establishing the following 11 groups: control (D0); MEM + (D2); MEM + (D6); MEM + 10 ng/ml of FSH (D2); MEM + 10 ng/ml of FSH (D6); MEM + 50 ng/ml of FSH (D2); MEM + 50 ng/ml of FSH (D6); MEM + 100 ng/ml of FSH (D2); MEM + 100 ng/ml of FSH (D6); MEM + 200 ng/ml of FSH (D2); and MEM + 200 ng/ml of FSH (D6)...
June 4, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28578727/focused-ion-beam-preparation-of-specimens-for-micro-electro-mechanical-system-based-transmission-electron-microscopy-heating-experiments
#18
Sriram Vijayan, Joerg R Jinschek, Stephan Kujawa, Jens Greiser, Mark Aindow
Micro-electro-mechanical systems (MEMS)-based heating holders offer exceptional control of temperature and heating/cooling rates for transmission electron microscopy experiments. The use of such devices is relatively straightforward for nano-particulate samples, but the preparation of specimens from bulk samples by focused ion beam (FIB) milling presents significant challenges. These include: poor mechanical integrity and site selectivity of the specimen, ion beam damage to the specimen and/or MEMS device during thinning, and difficulties in transferring the specimen onto the MEMS device...
June 5, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28575941/a-systematic-study-of-mechanical-properties-corrosion-behavior-and-biocompatibility-of-az31b-mg-alloy-after-ultrasonic-nanocrystal-surface-modification
#19
Xiaoning Hou, Haifeng Qin, Hongyu Gao, Steven Mankoci, Ruixia Zhang, Xianfeng Zhou, Zhencheng Ren, Gary L Doll, Ashlie Martini, Nita Sahai, Yalin Dong, Chang Ye
Magnesium alloys have tremendous potential for biomedical applications due to their good biocompatibility, osteoconductivity, and degradability, but can be limited by their poor mechanical properties and fast corrosion in the physiological environment. In this study, ultrasonic nanocrystal surface modification (UNSM), a recently developed surface processing technique that utilizes ultrasonic impacts to induce plastic strain on metal surfaces, was applied to an AZ31B magnesium (Mg) alloy. The mechanical properties, corrosion resistance, and biocompatibility of the alloy after UNSM treatment were studied systematically...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28571438/the-application-of-chaotic-oscillator-in-detecting-weak-resonant-signal-of-mems-resonator
#20
Huichao Shi, Wenlong Li
In this paper, a detection model of a chaotic oscillator is applied in the weak signal detection of an electrothermal excitation MEMS resonator, and the maximum Lyapunov exponent is used to obtain the threshold value and monitor the motion transition of a detection system. The phase drift caused by the electrothermal excitation is studied theoretically and experimentally, and according to the results of above study, the phase of a reference current signal is set to eliminate the phase when the resonator is in a resonant state...
May 2017: Review of Scientific Instruments
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