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https://www.readbyqxmd.com/read/28814022/estimating-anatomical-wrist-joint-motion-with-a-robotic-exoskeleton
#1
Chad G Rose, Claudia K Kann, Ashish D Deshpande, Marcia K O'Malley
Robotic exoskeletons can provide the high intensity, long duration targeted therapeutic interventions required for regaining motor function lost as a result of neurological injury. Quantitative measurements by exoskeletons have been proposed as measures of rehabilitative outcomes. Exoskeletons, in contrast to end effector designs, have the potential to provide a direct mapping between human and robot joints. This mapping rests on the assumption that anatomical axes and robot axes are aligned well, and that movement within the exoskeleton is negligible...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814008/self-aligning-exoskeleton-hip-joint-kinematic-design-with-five-revolute-three-prismatic-and-one-ball-joint
#2
Jonas Beil, Charlotte Marquardt, Tamim Asfour
Kinematic compatibility is of paramount importance in wearable robotic and exoskeleton design. Misalignments between exoskeletons and anatomical joints of the human body result in interaction forces which make wearing the exoskeleton uncomfortable and even dangerous for the human. In this paper we present a kinematically compatible design of an exoskeleton hip to reduce kinematic incompatibilities, so called macro- and micro-misalignments, between the human's and exoskeleton's joint axes, which are caused by inter-subject variability and articulation...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28814000/preliminary-study-of-a-robotic-foot-ankle-prosthesis-with-active-alignment
#3
Andrew K LaPre, Ryan D Wedge, Brian R Umberger, Frank C Sup
Robotic prosthetic foot-ankle prostheses typically aim to replace the lost joint with revolute joints aimed at replicating normal joint biomechanics. In this paper, a previously developed robotic ankle prosthesis with active alignment is evaluated. It uses a four-bar mechanism to inject positive power into the gait cycle while altering the kinematics of the ankle joint and pylon segment to reduce loading on the residual limb. In a single-subject biomechanics analysis, there was a 10% reduction in peak limb pressures and evidence of greater gait symmetry in ground reaction forces when active alignment was implemented compared to walking with the daily use prosthesis...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813860/design-and-evaluation-of-a-modular-lower-limb-exoskeleton-for-rehabilitation
#4
Wilian M Dos Santos, Samuel L Nogueira, Gustavo C de Oliveira, Guido G Pena, Adriano A G Siqueira
This paper deals with the evaluation of an exoskeleton designed for assisting individuals to rehabilitate compromised lower limb movements resulting from stroke or incomplete spinal cord injury. The exoskeleton is composed of lightweight tubular structures and six free joints that provide a modular feature to the system. This feature allows the exoskeleton to be adapted to assist the movement of one or more patient joints. The actuation of the exoskeleton is also modular, and can be performed passively, by means of springs and dampers, or actively through actuators...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813735/duration-of-antibiotics-prescribed-at-hospital-discharge
#5
Susan E Hoover
INTRODUCTION: A patient's transition from hospitalization to discharge may represent an additional opportunity for antibiotic stewardship. METHODS: We reviewed antimicrobial drugs prescribed at discharge to patients at our medical center over a nine-month period, and calculated the total duration of inpatient and outpatient antibiotic therapy. RESULTS: The median duration of inpatient antibiotics was three days (interquartile range [IQR] four days), of outpatient antibiotics was seven days (IQR six days), and of total antibiotics 10 days (IQR six days)...
April 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28813599/tetraterpene-synthase-substrate-and-product-specificity-in-the-green-microalga-botryococcus-braunii-race-l
#6
Hem Raj Thapa, Su Tang, James C Sacchettini, Timothy P Devarenne
Recently, the biosynthetic pathway for lycopadiene, a C40 tetraterpenoid hydrocarbon, was deciphered from the L race of Botryococcus braunii, an alga that produces hydrocarbon oils capable of being converted into combustible fuels. The lycopadiene pathway is initiated by the squalene synthase (SS)-like enzyme lycopaoctaene synthase (LOS), which catalyzes the head-to-head condensation of two C20 geranylgeranyl diphosphate (GGPP) molecules to produce C40 lycopaoctaene. LOS shows unusual substrate promiscuity for SS or SS-like enzymes by utilizing C15 farnesyl diphosphate (FPP) and C20 phytyl diphosphate in addition to GGPP as substrates...
August 16, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28813473/the-availability-of-pharmacies-in-the-united-states-2007-2015
#7
Dima Mazen Qato, Shannon Zenk, Jocelyn Wilder, Rachel Harrington, Darrell Gaskin, G Caleb Alexander
IMPORTANCE: Despite their increasingly important role in health care delivery, little is known about the availability, and characteristics, of community pharmacies in the United States. OBJECTIVES: (1) To examine trends in the availability of community pharmacies and pharmacy characteristics (24-hour, drive-up, home delivery, e-prescribing, and multilingual staffing) associated with access to prescription medications in the U.S. between 2007 and 2015; and (2) to determine whether and how these patterns varied by pharmacy type (retail chains, independents, mass retailers, food stores, government and clinic-based) and across counties...
2017: PloS One
https://www.readbyqxmd.com/read/28813427/electromagneto-squeezing-rotational-flow-of-carbon-c-water-h2o-kerosene-oil-nanofluid-past-a-riga-plate-a-numerical-study
#8
Tasawar Hayat, Mumtaz Khan, Muhammad Ijaz Khan, Ahmed Alsaedi, Muhammad Ayub
This article predicts the electromagneto squeezing rotational flow of carbon-water nanofluid between two stretchable Riga plates. Riga plate is known as electromagnetic actuator which is the combination of permanent magnets and a span wise aligned array of alternating electrodes mounted on a plane surface. Mathematical model is developed for the flow problem with the phenomena of melting heat transfer, viscous dissipation and heat generation/absorption. Water and kerosene oil are utilized as the base fluids whereas single and multi-wall carbon nanotubes as the nanomaterials...
2017: PloS One
https://www.readbyqxmd.com/read/28813316/perspectives-on-the-conceptualization-of-the-dissociative-subtype-of-ptsd-and-implications-for-treatment
#9
REVIEW
Sunny J Dutra, Erika J Wolf
A dissociative subtype of PTSD was added to the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) to denote a distinct presentation of PTSD marked by symptoms of derealization and depersonalization. The subtype has brought renewed interest in the conceptualization of dissociation in PTSD, and raised questions about its treatment. We review the evidence for two models of PTSD-related dissociative symptoms and the treatment approaches that align with each. We find support for the contributions of biologically-based trait-level factors to dissociation, and suggest that empirically supported treatments for PTSD demonstrate efficacy for patients with the subtype...
April 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28812996/reliable-detection-of-herpes-simplex-virus-sequence-variation-by-high-throughput-resequencing
#10
Alison M Morse, Kaitlyn R Calabro, Justin M Fear, David C Bloom, Lauren M McIntyre
High-throughput sequencing (HTS) has resulted in data for a number of herpes simplex virus (HSV) laboratory strains and clinical isolates. The knowledge of these sequences has been critical for investigating viral pathogenicity. However, the assembly of complete herpesviral genomes, including HSV, is complicated due to the existence of large repeat regions and arrays of smaller reiterated sequences that are commonly found in these genomes. In addition, the inherent genetic variation in populations of isolates for viruses and other microorganisms presents an additional challenge to many existing HTS sequence assembly pipelines...
August 16, 2017: Viruses
https://www.readbyqxmd.com/read/28812870/antifouling-thermoplastic-composites-with-maleimide-encapsulated-in-clay-nanotubes
#11
Ye Fu, Congcong Gong, Wencai Wang, Liqun Zhang, Evgenii Ivanov, Yuri M Lvov
An antifouling ethylene-vinyl acetate copolymer (EVA) with halloysite clay nanotubes loaded with maleimide (TCPM) is prepared. Such encapsulation allowed for extended release of TCPM and a long-lasting, efficient protection of the coated surface against marine microorganisms proliferation. Halloysite also induces the composite's anisotropy due to parallel alignment of the nanotubes. The maleimide loaded halloysite incorporated into the polymer matrix allowed for 12-month release of the bacterial inhibitor preventing fouling; it is much longer than the 2-3 month protection when TCPM is directly admixed into EVA...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28812769/multiplex-coaxial-flow-focusing-for-producing-multicompartment-janus-microcapsules-with-tunable-material-compositions-and-structural-characteristics
#12
Qiang Wu, Chaoyu Yang, Guangli Liu, Wanghuai Xu, Zhiqiang Zhu, Ting Si, Ronald X Xu
We propose a simple but efficient multiplex coaxial flow focusing (MCFF) process for single-step fabrication of multicompartment Janus microcapsules (MJMs) in a wide range of operating parameters. The produced MJMs consist of a multicompartmental core-shell structure with material compositions tunable in individual shell and core compartments. Potential applications of such a MJM agent are demonstrated in both benchtop and in vitro experiments. For the benchtop experiment, magnetic nanoparticles are loaded into one of the shell compartments and photopolymerized under ultraviolet light for controlled alignment and rotation of the microcapsules in a magnetic field...
August 16, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28812654/transitions-between-phases-of-genomic-differentiation-during-stick-insect-speciation
#13
Rüdiger Riesch, Moritz Muschick, Dorothea Lindtke, Romain Villoutreix, Aaron A Comeault, Timothy E Farkas, Kay Lucek, Elizabeth Hellen, Víctor Soria-Carrasco, Stuart R Dennis, Clarissa F de Carvalho, Rebecca J Safran, Cristina P Sandoval, Jeff Feder, Regine Gries, Bernard J Crespi, Gerhard Gries, Zach Gompert, Patrik Nosil
Speciation can involve a transition from a few genetic loci that are resistant to gene flow to genome-wide differentiation. However, only limited data exist concerning this transition and the factors promoting it. Here, we study phases of speciation using data from >100 populations of 11 species of Timema stick insects. Consistent with early phases of genic speciation, adaptive colour-pattern loci reside in localized genetic regions of accentuated differentiation between populations experiencing gene flow...
February 17, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812544/photoelectric-response-properties-under-uv-red-light-irradiation-of-zno-nanorod-arrays-coated-with-vertically-aligned-mos2-nanosheets
#14
Yuzhu Zhang, Jianping Xu, Shaobo Shi, Yanyan Gao, Xiangguo Zhao, Chengtai Wei, Xiaosong Zhang, Lan Li
MoS2 with layered structure and distinct physical properties has attracted attention for electronic or optoelectronic devices. The photoelectric response properties of MoS2/ZnO heterojunctions based devices fabricated by spin-coating MoS2 nanosheets solutions on ZnO nanorod arrays (NRs) were investigated. The results revealed that MoS2 nanosheets were vertically aligned on the surface of ZnO NRs and the devices exhibit good photoresponse stability and reproducibility under UV and red light illuminations. The vertically aligned MoS2 nanosheets facilitate the fast photogenerated carrier separation and transport...
August 16, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28812315/metabolite-cycled-steam-and-semi-laser-localization-for-mr-spectroscopy-of-the-human-brain-at-9-4t
#15
Ioannis-Angelos Giapitzakis, Tingting Shao, Nikolai Avdievich, Ralf Mekle, Roland Kreis, Anke Henning
PURPOSE: Metabolite cycling (MC) is an MRS technique for the simultaneous acquisition of water and metabolite spectra that avoids chemical exchange saturation transfer effects and for which water may serve as a reference signal or contain additional information in functional or diffusion studies. Here, MC was developed for human investigations at ultrahigh field. METHODS: MC-STEAM and MC-semi-LASER are introduced at 9.4T with an optimized inversion pulse and elaborate coil setup...
August 15, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28812203/assessment-of-methodologies-to-calculate-intraventricular-pressure-differences-in-computational-models-and-patients
#16
Francisco J Londono-Hoyos, Abigail Swillens, Joris Van Cauwenberge, Brett Meyers, Maheswara Reddy Koppula, Pavlos Vlachos, Julio A Chirinos, Patrick Segers
Intraventricular pressure differences (IVPDs) govern left ventricular (LV) efficient filling and are a significant determinant of LV diastolic function. Our primary aim is to assess the performance of available methods (color M-mode (CMM) and 1D/2D MRI-based methods) to determine IVPDs from intracardiac flow measurements. Performance of three methods to calculate IVPDs was first investigated via an LV computational fluid dynamics (CFD) model. CFD velocity data were derived along a modifiable scan line, mimicking ultrasound/MRI acquisition of 1D (IVPDCMM/IVPD1D MRI) and 2D (IVPD2D MRI) velocity-based IVPD information...
August 16, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28811820/modified-mahalanobis-taguchi-system-for-imbalance-data-classification
#17
Mahmoud El-Banna
The Mahalanobis Taguchi System (MTS) is considered one of the most promising binary classification algorithms to handle imbalance data. Unfortunately, MTS lacks a method for determining an efficient threshold for the binary classification. In this paper, a nonlinear optimization model is formulated based on minimizing the distance between MTS Receiver Operating Characteristics (ROC) curve and the theoretical optimal point named Modified Mahalanobis Taguchi System (MMTS). To validate the MMTS classification efficacy, it has been benchmarked with Support Vector Machines (SVMs), Naive Bayes (NB), Probabilistic Mahalanobis Taguchi Systems (PTM), Synthetic Minority Oversampling Technique (SMOTE), Adaptive Conformal Transformation (ACT), Kernel Boundary Alignment (KBA), Hidden Naive Bayes (HNB), and other improved Naive Bayes algorithms...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28811626/outbreak-and-genotyping-of-canine-distemper-virus-in-captive-siberian-tigers-and-red-pandas
#18
He Zhang, Fen Shan, Xia Zhou, Bing Li, Jun-Qiong Zhai, Shu-Zhan Zou, Meng-Fan Wu, Wu Chen, Shao-Lun Zhai, Man-Lin Luo
In this study, four canine distemper virus (CDV) strains were isolated from captive Siberian tigers (Panthera tigris altaica) and red pandas (Ailurus fulgens) during two separate CDV outbreaks in a zoo in Guangdong province, China. Sequence alignment and phylogenetic analyses based on the full-length hemagglutinin (H) and fusion (F) genes showed that they were closely identical to genotype Asia-1. Prior to confirmation of CDV in Siberian tigers, to control spread of the disease, a live attenuated combination CDV vaccine was used among almost all carnivore animals except for red pandas in which another recombinant combination CDV vaccine was used...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811614/retarded-saturation-of-the-areal-capacitance-using-3d-aligned-mno2-thin-film-nanostructures-as-a-supercapacitor-electrode
#19
Green Kim, Ilhwan Ryu, Sanggyu Yim
The supercapacitive properties of manganese oxide (MnO2) thin films electrodeposited on three-dimensionally (3D) aligned inverse-opal nickel nanostructures are investigated. Compared to conventional planar or two-dimensionally (2D) aligned nanostructures, 3D-aligned nanostructures can provide considerably increased and controllable contacts between the electrode and electrolyte. As a result, saturation of the areal capacitance with the electrode thickness and associated decrease of the specific capacitance, C sp , become much slower than those of the planar and 2D-aligned electrode systems...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811568/dynamic-x-ray-radiography-reveals-particle-size-and-shape-orientation-fields-during-granular-flow
#20
François Guillard, Benjy Marks, Itai Einav
When granular materials flow, the constituent particles segregate by size and align by shape. The impacts of these changes in fabric on the flow itself are not well understood, and thus novel non-invasive means are needed to observe the interior of the material. Here, we propose a new experimental technique using dynamic X-ray radiography to make such measurements possible. The technique is based on Fourier transformation to extract spatiotemporal fields of internal particle size and shape orientation distributions during flow, in addition to complementary measurements of velocity fields through image correlation...
August 15, 2017: Scientific Reports
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