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https://www.readbyqxmd.com/read/28644206/burn-patient-acuity-demographics-scar-contractures-and-rehabilitation-treatment-time-related-to-patient-outcomes-the-act-study
#1
Reg Richard, Alexis R Santos-Lozada
In 2008, the U.S. Department of Defense funded a rehabilitation study through the American Burn Association titled "Burn patient acuity demographics, scar contractures, and rehabilitation treatment time related to patient outcomes," commonly known at the ACT study. The ACT was a multi-institutional, prospective, observational, and quasirandomized investigation of the acute hospital course of 307 patients. The ACT specifically emphasized the capture of factors that may impact the physical outcome of patients with burn injury including burn severity, daily rehabilitation interventions such as mobility and splinting, and detailed skin grafting episodes...
July 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28644193/heel-raised-foot-posture-do-not-affect-trunk-and-lower-extremity-biomechanics-during-a-barbell-back-squat-in-recreational-weightlifters
#2
Szu-Ping Lee, Carrie Gillis, Javier J Ibarra, Derek Oldroyd, Ryan Zane
It is claimed that weightlifting shoes with a raised heel may lead to a more upright trunk posture, and thus reduce the risk of back injuries during a barbell back squat. These proclaimed biomechanical effects have not been thoroughly investigated. The purpose of this study was to compare trunk and lower extremity biomechanics during barbell back squats in 3 foot postures.14 recreational weightlifters (7 male and 7 female) between the ages of 18-50 performed barbell back squats in 3 conditions (barefoot on a flat surface, barefoot on a heel-raised platform, and wearing heel-raised weightlifting shoes) at 80% of their 1-RM...
June 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28641201/pelvic-and-hip-kinematics-during-single-leg-drop-landing-are-altered-in-sports-participants-with-long-standing-groin-pain-a-cross-sectional-study
#3
L Janse van Rensburg, M Dare, Q Louw, L Crous, J Cockroft, L Williams, B Olivier
OBJECTIVES: The aim of this study was to determine the differences in three-dimensional pelvic and hip kinematics during a single-leg drop-landing task in active sports participants with long-standing groin pain compared to healthy matched controls. DESIGN: This was a descriptive study incorporating a cross-sectional design. SETTING: The study was conducted at the Unit for Human Movement Analysis, Stellenbosch University, South Africa. PARTICIPANTS: The study sample was comprised of 20 male club level soccer, rugby, running and cycling participants between the ages of 18 and 55 years...
May 12, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28634743/comminuted-olecranon-fractures-biomechanical-testing-of-locked-versus-minifragment-non-locked-plate-fixation
#4
David S Wellman, Scott M Tucker, Josh R Baxter, Nadine C Pardee, Lionel E Lazaro, Christopher S Smith, Dean G Lorich, David L Helfet
INTRODUCTION: Open reduction and internal fixation has long been accepted as optimal treatment for displaced olecranon fractures based on poor results seen with conservative management. With the presence of comminution, tension-band wiring constructs are contraindicated due to tendency to compress through fragments, thereby shortening the articular segment. Therefore, plate fixation is typically employed. Our hypothesis was that in a comminuted fracture model, 2.7 mm reconstruction plating without locking screws will perform equally to 3...
June 20, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28633608/biomechanics-of-increased-spin-velocity-of-flying-discs-during-forehand-throws-by-skilled-and-unskilled-throwers
#5
Kei Sasakawa, Koji Umegaki, Shinji Sakurai
We aimed to assess the relationship between throwing distance and kinematic release parameters of the flying disc in unskilled throwers, and to assess the relationship between kinetic variables acting on flying discs and the change in spin velocity during long forehand throws by skilled and unskilled throwers. Ten skilled and eleven unskilled throwers performed throws at maximum effort. Reflective marker positions on the disc and body were recorded with a 3D motion capture system during the throws to derive kinematic variables of a disc and kinetic variables acting on the disc...
June 20, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28632063/kinetic-analysis-of-the-lower-limbs-in-baseball-tee-batting
#6
Kazumichi Ae, Sekiya Koike, Norihisa Fujii, Michiyoshi Ae, Takashi Kawamura
The purpose of this study was to investigate effects of the ground reaction forces on the rotation of the body as a whole and on the joint torques of the lower limbs associated with trunk and pelvic rotation in baseball tee batting. A total of 22 male collegiate baseball players participated in this study. Three-dimensional coordinate data were acquired by a motion capture system (250 Hz), and ground reaction forces of both legs were measured with three force platforms (1,000 Hz). Kinetic data were used to calculate the moment about the vertical axis through the body's centre of mass resulting from ground reaction forces, as well as to calculate the torque and mechanical work in the lower limb joints...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632054/middle-finger-and-ball-movements-around-ball-release-during-baseball-fastball-pitching
#7
Tomoyuki Matsuo, Tsutomu Jinji, Daisaku Hirayama, Daiki Nasu, Hiroki Ozaki, Daisuke Kumagawa
The objectives of this study were to investigate middle finger movements and dynamics of ball movements around the instant of ball release during baseball pitching. Baseball pitching from an indoor mound among 14 semi-professional pitchers was captured using a motion capture system with 16 high-speed cameras (1,000 Hz). Kinematics of middle finger joints, ball rotation, and force applied to the ball were calculated. The proximal and distal interphalangeal joints continued to extend until the instant of ball release, then abruptly flexed...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632049/kinematic-comparison-of-the-seoi-nage-judo-technique-between-elite-and-college-athletes
#8
Takanori Ishii, Michiyoshi Ae, Yuta Suzuki, Yasuto Kobayashi
This study sought to identify biomechanical factors that determine fast and skilful execution of the seoi-nage (shoulder throw) technique by comparing kinematics between elite and college judo athletes. Three-dimensional motion data were captured using a VICON-MX system with 18 cameras operating at 250 Hz as three male elite and seven male college judo athletes performed seoi-nage. No significant difference was found in motion phase time of the turning phase between the two groups, indicating that motion phase time is not necessarily a factor contributing quickness in seoi-nage...
February 24, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632045/comparison-of-crossover-and-jab-step-start-techniques-for-base-stealing-in-baseball
#9
Tomohisa Miyanishi, So Endo, Ryu Nagahara
Base stealing is an important tactic for increasing the chance of scoring in baseball. This study aimed to compare the crossover step (CS) and jab step (JS) starts for base stealing start performance and to clarify the differences between CS and JS starts in terms of three-dimensional lower extremity joint kinetics. Twelve male baseball players performed CS and JS starts, during which their motion and the force they applied to the ground were simultaneously recorded using a motion-capture system and two force platforms...
February 24, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28631166/morphology-and-the-gradient-of-a-symmetric-potential-predict-gait-transitions-of-dogs
#10
Simon Wilshin, G Clark Haynes, Jack Porteous, Daniel Koditschek, Shai Revzen, Andrew J Spence
Gaits and gait transitions play a central role in the movement of animals. Symmetry is thought to govern the structure of the nervous system, and constrain the limb motions of quadrupeds. We quantify the symmetry of dog gaits with respect to combinations of bilateral, fore-aft, and spatio-temporal symmetry groups. We tested the ability of symmetries to model motion capture data of dogs walking, trotting and transitioning between those gaits. Fully symmetric models performed comparably to asymmetric with only a [Formula: see text] increase in the residual sum of squares and only one-quarter of the parameters...
June 19, 2017: Biological Cybernetics
https://www.readbyqxmd.com/read/28630162/real-time-dynamics-of-carbon-nanotube-porins-in-supported-lipid-membranes-visualized-by-high-speed-atomic-force-microscopy
#11
Yuliang Zhang, Ramya H Tunuguntla, Pyung-On Choi, Aleksandr Noy
In-plane mobility of proteins in lipid membranes is one of the fundamental mechanisms supporting biological functionality. Here we use high-speed atomic force microscopy (HS-AFM) to show that a novel type of biomimetic channel-carbon nanotube porins (CNTPs)-is also laterally mobile in supported lipid membranes, mimicking biological protein behaviour. HS-AFM can capture real-time dynamics of CNTP motion in the supported lipid bilayer membrane, build long-term trajectories of the CNTP motion and determine the diffusion coefficients associated with this motion...
August 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28629220/ring-polymer-surface-hopping-incorporating-nuclear-quantum-effects-into-nonadiabatic-molecular-dynamics-simulations
#12
Farnaz A Shakib, Pengfei Huo
We apply a recently proposed ring polymer surface hopping (RPSH) approach to investigate the real-time nonadiabatic dynamics with explicit nuclear quantum effects. The nonadibatic electronic transitions are described through Tully's fewest-switches surface hopping algorithm and the motion of the nuclei are quantized through the ring polymer Hamiltonian in the extended phase space. Applying the RPSH method to simulate Tully's avoided crossing models, we demonstrate the critical role of the nuclear tunneling effect and zero-point energy for accurately describing the transmission and reflection probabilities with low initial momenta...
June 22, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28628348/relation-between-peak-knee-flexion-angle-and-knee-ankle-kinetics-in-single-leg-jump-landing-from-running-a-pilot-study-on-male-handball-players-to-prevent-acl-injury
#13
Mariam A Ameer, Qassim I Muaidi
OBJECTIVES: The relationship between knee kinematics and knee-ankle kinetics during the landing phase of single leg jumping has been widely studied to identify proper strategies for preventing non-contact ACL injury. However, there is a lack of study on knee-ankle kinetics at peak knee flexion angle during jumping from running. Hence, the purpose of this study is to establish the relationship between peak knee flexion angle, knee extension moment, ankle plantar flexion moment and ground reaction force in handball players in order to protect ACL from excessive stress during single leg jumping...
June 19, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28626796/determining-underground-mining-work-postures-using-motion-capture-and-digital-human-modeling
#14
Timothy J Lutz, Joseph P DuCarme, Adam K Smith, Dean Ambrose
According to Mine Safety and Health Administration (MSHA) data, during 2008-2012 in the U.S., there were, on average, 65 lost-time accidents per year during routine mining and maintenance activities involving remote-controlled continuous mining machines (CMMs). To address this problem, the National Institute for Occupational Safety and Health (NIOSH) is currently investigating the implementation and integration of existing and emerging technologies in underground mines to provide automated, intelligent proximity detection (iPD) devices on CMMs...
December 27, 2016: Journal of Environment and Health Sciences
https://www.readbyqxmd.com/read/28626493/a-kinematic-study-of-prosodic-structure-in-articulatory-and-manual-gestures-results-from-a-novel-method-of-data-collection
#15
Jelena Krivokapić, Mark K Tiede, Martha E Tyrone
The primary goal of this work is to examine prosodic structure as expressed concurrently through articulatory and manual gestures. Specifically, we investigated the effects of phrase-level prominence (Experiment 1) and of prosodic boundaries (Experiments 2 and 3) on the kinematic properties of oral constriction and manual gestures. The hypothesis guiding this work is that prosodic structure will be similarly expressed in both modalities. To test this, we have developed a novel method of data collection that simultaneously records speech audio, vocal tract gestures (using electromagnetic articulometry) and manual gestures (using motion capture)...
2017: Laboratory Phonology
https://www.readbyqxmd.com/read/28624711/does-the-powers%C3%A2-strap-influence-the-lower-limb-biomechanics-during-running
#16
Henrike Greuel, Lee Herrington, Anmin Liu, Richard K Jones
Previous research has reported a prevalence of running related injuries in 25.9% to 72% of all runners. A greater hip internal rotation and adduction during the stance phase in running has been associated with many running related injuries, such as patellofemoral pain. Researchers in the USA designed a treatment device 'the Powers™ strap' to facilitate an external rotation of the femur and to thereby control abnormal hip and knee motion during leisure and sport activities. However, to date no literature exists to demonstrate whether the Powers™ strap is able to reduce hip internal rotation during running...
June 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28613171/simultaneous-feature-and-dictionary-learning-for-image-set-based-face-recognition
#17
Jiwen Lu, Gang Wang, Jie Zhou
In this paper, we propose a simultaneous feature and dictionary learning (SFDL) method for image set based face recognition, where each training and testing example contains a set of face images which were captured from different variations of pose, illumination, expression, resolution and motion. While a variety of feature learning and dictionary learning methods have been proposed in recent years and some of them have been successfully applied to image set based face recognition, most of them learn features and dictionaries for facial image sets individually, which may not be powerful enough because some discriminative information for dictionary learning may be compromised in the feature learning stage if they are applied sequentially, and vice versa...
June 8, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28605148/effects-of-a-dynamic-core-stability-programme-on-the-biomechanics-of-cutting-manoeuvres-a-randomised-controlled-trial
#18
Enda F Whyte, Chris Richter, Siobhan O'Connor, Kieran A Moran
Deficits in trunk control predict ACL injuries which frequently occur during high risk activities such as cutting. However, no existing trunk control/core stability programme has been found to positively affect trunk kinematics during cutting activities. This study investigated the effectiveness of a 6-week dynamic core stability programme (DCS) on the biomechanics of anticipated and unanticipated side and crossover cutting manoeuvres. Thirty-one male, varsity footballers participated in this randomised controlled trial...
June 12, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28603970/microbots-decorated-with-silver-nanoparticles-kill-bacteria-in-aqueous-media
#19
Diana Vilela, Morgan M Stanton, Jemish Parmar, Samuel Sanchez
Water contamination is one of the most persistent problems in public health. The resistance of some pathogens to conventional disinfectants can require the combination of multiple disinfectants or increased disinfectant dosages which may produce harmful by-products. Here, we describe an efficient disinfection and removal method of Escherichia coli (E. coli) from contaminated water by using water self-propelled Janus microbots decorated with silver nanoparticles (AgNPs). The spherical Janus microbot's structure consists of a magnesium (Mg) microparticle as a template that also functions as propulsion source by producing hydrogen bubbles while in contact with water, an inner iron (Fe) magnetic layer for their remote guidance and collection, and an outer AgNP coated gold (Au) layer for bacteria adhesion and bactericidal properties...
June 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28603960/dynamic-colloidal-molecules-maneuvered-by-light-controlled-janus-micromotors
#20
Yirong Gao, Fangzhi Mou, Yizheng Feng, Shengping Che, Wei Li, Leilei Xu, Jianguo Guan
In this work, we have proposed and demonstrated a dynamic colloidal molecule, which is capable of moving autonomously and performing swift, reversible and in-place assembly-dissociation in a high accuracy by manipulating a TiO2/Pt Janus micromotor with light irradiation. Due to the efficient motion of the TiO2/Pt Janus motor and the light-switchable electrostatic interactions between the micromotor and colloidal particles, the colloidal particles can be captured and assembled one by one on the fly, subsequently forming into swimming colloidal molecules by mimicking space-filling models of simple molecules with central atoms...
June 12, 2017: ACS Applied Materials & Interfaces
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