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https://www.readbyqxmd.com/read/28730917/novice-runners-show-greater-changes-in-kinematics-with-fatigue-compared-with-competitive-runners
#1
Ellen Maas, Jorien De Bie, Riet Vanfleteren, Wouter Hoogkamer, Benedicte Vanwanseele
Fatigue, developed over the course of a run, may cause changes in running kinematics. Training status may influence the effect of fatigue on running kinematics, since well trained, competitive runners are used to running until exhaustion, whereas novice runners are not. This study aimed to determine changes in running kinematics during an exhaustive run in both novice (NOVICE) and competitive (COMP) long-distance runners. About 15 NOVICE and 15 COMP runners performed a treadmill run, until voluntary exhaustion at 3,200 m time trial pace...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28729931/validity-and-reliability-of-the-catwalk-system-as-a-static-and-dynamic-gait-analysis-tool-for-the-assessment-of-functional-nerve-recovery-in-small-animal-models
#2
Elisabeth A Kappos, Patricia K Sieber, Patricia E Engels, Alessio V Mariolo, Salvatore D'Arpa, Dirk J Schaefer, Daniel F Kalbermatten
INTRODUCTION: A range of behavioral testing paradigms have been developed for the research of central and peripheral nerve injuries with the help of small animal models. Following any nerve repair strategy, improved functional outcome may be the most important evidence of axon regeneration. A novel automated gait analysis system, the CatWalk(™), can measure dynamic as well as static gait patterns of small animals. Of most interest in detecting functional recovery are in particular dynamic gait parameters, coordination measures, and the intensity of the animals paw prints...
July 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28726966/ab-initio-performance-predictions-of-single-layer-in-v-tunnel-field-effect-transistors
#3
Juan Lu, Zhi-Qiang Fan, Jian Gong, Xiang-Wei Jiang
The device performances of both n-type and p-type tunnel field-effect transistors (TFETs) made of single-layer InX (X = N, P, As, Sb) are theoretically evaluated through density functional theory (DFT) and ab initio simulations in this paper. It is found that a promising steep subthreshold swing (SS) of [less-than-or-eq] 60 mV dec(-1) can be obtained with gate length LG = 15.2 nm for all two-dimensional (2D) InX TFETs. In particular, an outstanding on-current of ∼1058 μA μm(-1) (or 880 μA μm(-1)) is estimated in a 2D p-type (or n-type) InSb device, which could barely satisfy the ITRS requirements for future high-performance (HP) applications...
July 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28725270/inter-segmental-motions-of-the-foot-differences-between-younger-and-older-healthy-adult-females
#4
Dong Yeon Lee, Sang Gyo Seo, Eo Jin Kim, Doo Jae Lee, Kee Jeong Bae, Kyoung Min Lee, In Ho Choi
BACKGROUND: Although accumulative evidence exists that support the applicability of multi-segmental foot models (MFMs) in evaluating foot motion in various pathologic conditions, little is known of the effect of aging on inter-segmental foot motion. The objective of this study was to evaluate differences in inter-segmental motion of the foot between older and younger adult healthy females during gait using a MFM with 15-marker set. METHODS: One hundred symptom-free females, who had no radiographic evidence of osteoarthritis, were evaluated using MFM with 15-marker set...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28725208/aldo-van-eyck-s-playgrounds-aesthetics-affordances-and-creativity
#5
Rob Withagen, Simone R Caljouw
After World War II, the Dutch architect Aldo van Eyck developed hundreds of playgrounds in the city of Amsterdam. These public playgrounds were located in parks, squares, and derelict sites, and consisted of minimalistic aesthetic play equipment that was supposed to stimulate the creativity of children. Over the last decades, these playgrounds have been studied by sociologists, theorists of art and architecture, and psychologists. Adopting an ecological approach to the human environment, it is argued that the abstract forms of van Eyck's play sculptures indeed stimulate the creativity of the child...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28719981/the-mental-representation-of-the-human-gait-in-patients-with-severe-knee-osteoarthrosis-a-clinical-study-to-aid-understanding-of-impairment-and-disability
#6
Robert Jacksteit, Anett Mau-Moeller, Martin Behrens, Rainer Bader, Wolfram Mittelmeier, Ralf Skripitz, Tino Stöckel
OBJECTIVE: Objectives were (1) to explore differences in gait-specific long-term memory structures and gait performance between knee osteoarthrosis patients and healthy subjects and (2) to identify the extent to which the gait-specific mental representation is associated with gait performance. DESIGN: Cross-sectional study. SUBJECTS: In total, 18 knee osteoarthrosis patients and 18 control subjects. METHODS: Spatio-temporal (gait speed, step length) and temporophasic (stance time, swing time, single support time, total double support time) gait parameters and gait variability were measured with an electronic walkway (OptoGait)...
July 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28719842/spatiotemporal-gait-changes-with-use-of-an-arm-swing-cueing-device-in-people-with-parkinson-s-disease
#7
Elizabeth Thompson, Peter Agada, W Geoffrey Wright, Hendrik Reimann, John Jeka
Impaired arm swing is a common motor symptom of Parkinson's disease (PD), and correlates with other gait impairments and increased risk of falls. Studies suggest that arm swing is not merely a passive consequence of trunk rotation during walking, but an active component of gait. Thus, techniques to enhance arm swing may improve gait characteristics. There is currently no portable device to measure arm swing and deliver immediate cues for larger movement. Here we test report pilot testing of such a device, ArmSense (patented), using a crossover repeated-measures design...
July 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28716735/pupillary-measurements-and-anisocoria-in-chinese-preschoolers-3-4-years-of-age-screened-using-the-plusoptix-a12c
#8
Dan Huang, Xiaohan Zhang, Yue Wang, Hui Zhu, Hui Ding, Jing Bai, Ji Chen, Zhujun Fu, Zijin Wang, Xuejuan Chen, Hu Liu
PURPOSE: To evaluate the distribution of the pupil diameter and distance and the incidence of anisocoria in a screening setting for Chinese preschoolers 3-4 years of age. METHODS: This was a cross-sectional, population-based study conducted in children aged 3-4 years in Nanjing, China. Plusoptix photoscreening was conducted without cycloplegia. Additional assessments were conducted, including light reaction test, reevaluation for anisocoria (in dim and bright light), swinging-flashlight test, and cocaine test, if necessary...
July 14, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28715936/selection-of-gait-parameters-for-differential-diagnostics-of-patients-with-de-novo-parkinson-s-disease
#9
Milica Djurić-Jovičić, Minja Belić, Iva Stanković, Saša Radovanović, Vladimir S Kostić
BACKGROUND: Gait disturbances are an integral part of clinical manifestations of Parkinson's disease (PD), even in the initial stages of the disease. Our goal was to identify the set of spatio-temporal gait parameters that bear the highest relevance for characterizing de novo PD patients. METHODS: Forty patients with de novo PD and forty healthy controls were recorded while walking over an electronic walkway in three different conditions: (1) base walking, (2) walking with an additional motor task, (3) walking with an additional mental task...
July 17, 2017: Neurological Research
https://www.readbyqxmd.com/read/28714798/foot-rollover-temporal-parameters-during-walking-straight-ahead-and-stepping-over-obstacles-obese-and-non-obese-postmenopausal-women
#10
David Silva, Ronaldo Gabriel, Helena Moreira, João Abrantes, Aurélio Faria
The aim of this study was to compare the temporal foot rollover data between walking straight ahead and stepping over obstacles for obese and non-obese postmenopausal women. Plantar pressure data were collected from 67 women. The initial, final, and duration of contact of 10 foot areas were measured. Both limbs of both groups showed a longer foot contact duration on the obstacle task. Significant temporal differences were found for both groups between straight ahead and crossing obstacles on the initial, final, and duration of contact for several foot areas...
July 17, 2017: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/28714240/tunable-snse2-wse2-heterostructure-tunneling-field-effect-transistor
#11
Xiao Yan, Chunsen Liu, Chao Li, Wenzhong Bao, Shijin Ding, David Wei Zhang, Peng Zhou
The burgeoning 2D semiconductors can maintain excellent device electrostatics with an ultranarrow channel length and can realize tunneling by electrostatic gating to avoid deprivation of band-edge sharpness resulting from chemical doping, which make them perfect candidates for tunneling field effect transistors. Here this study presents SnSe2 /WSe2 van der Waals heterostructures with SnSe2 as the p-layer and WSe2 as the n-layer. The energy band alignment changes from a staggered gap band offset (type-II) to a broken gap (type-III) when changing the negative back-gate voltage to positive, resulting in the device operating as a rectifier diode (rectification ratio ~10(4) ) or an n-type tunneling field effect transistor, respectively...
July 17, 2017: Small
https://www.readbyqxmd.com/read/28712731/cervical-dystonia-patients-display-subclinical-gait-changes
#12
Marcello Esposito, Raffaele Dubbioso, Silvio Peluso, Antonio Picone, Bruno Corrado, Clemente Servodio Iammarone, Roberto Allocca, Fiore Manganelli, Lucio Santoro, Alfonso Fasano
INTRODUCTION: Gait disorders in cervical dystonia (CD) are reported in patients under DBS or in severe cases complicated with spinal deformities. OBJECTIVE: to assess walking motor pattern in CD patients without DBS and not presenting scoliosis. METHODS: Computerized gait analysis (CGA) was performed in CD patients, before and after botulinum toxin (BoNT) injections, and in healthy controls (HC). Spatiotemporal (ST) parameters were compared between CD and HC groups...
July 10, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28712626/public-preferences-for-lung-cancer-screening-policies
#13
Henk Broekhuizen, Catharina G M Groothuis-Oudshoorn, Rozemarijn Vliegenthart, Harry Groen, Maarten J IJzerman
BACKGROUND: Because early detection of lung cancer can substantially improve survival, there is increasing attention for lung cancer screening. OBJECTIVES: To estimate public preferences for lung cancer screening and to identify subgroups in preferences. METHODS: Seven important attributes were selected using the literature, interviews, and a panel session. Preferences were elicited using a swing weighting questionnaire. The resulting attribute weights indicate the relative importance of swings from the worst to the best level between attributes...
July 2017: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/28708199/management-of-transposed-arteriovenous-fistula-swing-point-stenosis-at-the-basilic-vein-angle-of-transposition-by-stent-grafts
#14
George M Nassar, Gerald Beathard, Edward Rhee, Abdul Jabbar Khan, Binh Nguyen
INTRODUCTION: Transposed basilic vein arteriovenous fistulas suffer from stenosis at their basilic angle of transposition (BAT). This lesion exhibits frequent recurrence after angioplasty. The primary goal of this study was to determine the effect of stent-graft placement on BAT lesion- and access-patency. The secondary goals were to determine the frequency of intervention pre- and post-stent placement and stent-associated stenosis. METHODS: Thirty-seven cases had stent-grafts placed at their BAT to manage stenosis...
July 5, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28704694/harmony-as-a-convergence-attractor-that-minimizes-the-energy-expenditure-and-variability-in-physiological-gait-and-the-loss-of-harmony-in-cerebellar-ataxia
#15
Mariano Serrao, Giorgia Chini, Marco Iosa, Carlo Casali, Giovanni Morone, Carmela Conte, Fabiano Bini, Franco Marinozzi, Gianluca Coppola, Francesco Pierelli, Francesco Draicchio, Alberto Ranavolo
BACKGROUND: The harmony of the human gait was recently found to be related to the golden ratio value (ϕ). The ratio between the duration of the stance and that of the swing phases of a gait cycle was in fact found to be close to ϕ, which implies that, because of the fractal property of autosimilarity of that number, the gait ratios stride/stance, stance/swing, swing/double support, were not significantly different from one another. We studied a group of patients with cerebellar ataxia to investigate how the differences between their gait ratios and the golden ratio are related to efficiency and stability of their gait, assessed by energy expenditure and stride-to-stride variability, respectively...
July 5, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28702558/high-performance-transparent-in-plane-silicon-nanowire-fin-tfts-via-a-robust-nano-droplet-scanning-crystallization-dynamics
#16
Mingkun Xu, Jimmy Wang, Zhaoguo Xue, Junzhuan Wang, Ping Feng, Linwei Yu, Jun Xu, Yi Shi, Kunji Chen, Pere Roca I Cabarrocas
High mobility, scalable and even transparent thin-film transistors (TFTs) are always being pursued in the field of large area electronics. While excimer laser-beam-scanning can crystallize amorphous Si (a-Si) into high mobility poly-Si, it is limited to small areas. We here demonstrate a robust nano-droplet-scanning strategy that converts an a-Si:H thin film directly into periodic poly-Si nano-channels, with the aid of well-coordinated indium droplets. This enables the robust batch-fabrication of high performance Fin-TFTs with a high hole mobility of >100 cm(2) V(-1) s(-1) and an excellent subthreshold swing of only 163 mV dec(-1), via a low temperature <350 °C thin film process...
July 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28702442/kinematics-and-neuromuscular-recruitment-during-vertical-treadmill-exercise
#17
Alastair R Jordan, Andrew Barnes, David Claxton, Alison Purvis, Mary Fysh
The vertical treadmill (VertiRun) is an unresearched, partial weight-bearing exercise mode for lower limb rehabilitation. The user undertakes a "running-like" action whilst body weight is supported by a bench and the limb is drawn downwards against overhanging resistance cables on a vertically hung nonmotorised treadmill. This study sought to describe the kinematics and neuromuscular recruitment during VertiRun exercise in the supine, 40°, and 70° postures. Twenty-one healthy male participants (age, 25±7 years; stature, 1...
June 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28696023/mcda-swing-weighting-and-discrete-choice-experiments-for-elicitation-of-patient-benefit-risk-preferences-a-critical-assessment
#18
Tommi Tervonen, Heather Gelhorn, Sumitra Sri Bhashyam, Jiat-Ling Poon, Katharine S Gries, Anne Rentz, Kevin Marsh
PURPOSE: Multiple criteria decision analysis swing weighting (SW) and discrete choice experiments (DCE) are appropriate methods for capturing patient preferences on treatment benefit-risk trade-offs. This paper presents a qualitative comparison of the 2 methods. METHODS: We review and critically assess similarities and differences of SW and DCE based on 6 aspects: comprehension by study participants, cognitive biases, sample representativeness, ability to capture heterogeneity in preferences, reliability and validity, and robustness of the results...
July 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28692691/extracting-time-frequency-feature-of-single-channel-vastus-medialis-emg-signals-for-knee-exercise-pattern-recognition
#19
Yi Zhang, Peiyang Li, Xuyang Zhu, Steven W Su, Qing Guo, Peng Xu, Dezhong Yao
The EMG signal indicates the electrophysiological response to daily living of activities, particularly to lower-limb knee exercises. Literature reports have shown numerous benefits of the Wavelet analysis in EMG feature extraction for pattern recognition. However, its application to typical knee exercises when using only a single EMG channel is limited. In this study, three types of knee exercises, i.e., flexion of the leg up (standing), hip extension from a sitting position (sitting) and gait (walking) are investigated from 14 healthy untrained subjects, while EMG signals from the muscle group of vastus medialis and the goniometer on the knee joint of the detected leg are synchronously monitored and recorded...
2017: PloS One
https://www.readbyqxmd.com/read/28691824/sustained-sub-60-mv-decade-switching-via-the-negative-capacitance-effect-in-mos2-transistors
#20
Felicia A McGuire, Yuh-Chen Lin, Katherine Price, G Bruce Rayner, Sourabh Khandelwal, Sayeef Salahuddin, Aaron D Franklin
It has been shown that a ferroelectric material integrated into the gate stack of a transistor can create an effective negative capacitance (NC) that allows the device to overcome "Boltzmann tyranny". While this switching below the thermal limit has been observed with Si-based NC field-effect transistors (NC-FETs), the adaptation to 2D materials would enable a device that is scalable in operating voltage as well as size. In this work, we demonstrate sustained sub-60 mV/dec switching, with a minimum subthreshold swing (SS) of 6...
July 12, 2017: Nano Letters
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