A5045778577- Lower Extremity Biomechanics and Pathologies
- Molecular Junctions and Nanostructures
- Sports injuries and prevention
- Sports Performance and Training
- Muscle activation and electromyography studies
- Diabetic Foot Ulcer Assessment and Management
- Occupational Health and Performance
- Electrochemical Analysis and Applications
- Quantum and electron transport phenomena
- Balance, Gait, and Falls Prevention
- Knee injuries and reconstruction techniques
- Winter Sports Injuries and Performance
- Bone fractures and treatments
- Motor Control and Adaptation
- Force Microscopy Techniques and Applications
- Shoulder Injury and Treatment
- Organic Electronics and Photovoltaics
- Foot and Ankle Surgery
- Cerebral Palsy and Movement Disorders
- Surface and Thin Film Phenomena
- Nanowire Synthesis and Applications
- Musculoskeletal pain and rehabilitation
- Crystallization and Solubility Studies
- Chemistry and Stereochemistry Studies
- Advanced biosensing and bioanalysis techniques
University of Massachusetts Amherst
2008-2025
University of Copenhagen
2022-2025
University of Ostrava
2021-2024
University of Birmingham
2019-2023
University of Nevada, Las Vegas
2015-2022
Republic Polytechnic
2020
Amherst College
2020
University of Bern
2015-2018
University of Massachusetts Boston
1988-2018
University of Georgia
2014-2016
Preferred stride frequency (PSF) of human walking has been shown to be predictable as the resonant a force-drive harmonic oscillator (FDHO). The purpose this study was determine whether at PSF and FDHO leads minimal metabolic mechanical costs. Subjects walked on level treadmill PSF, FDHO, frequencies above below. Effects length (SL) speed (S) were assessed by two conditions, one in which SL constant other S constant. predictability from resonance replicated. Walking resulted costs not...
The possibility that preferred modes of locomotion emerge from dynamical and optimality constraints the energetic on predicted walking frequency are explored in this article. Participants were required to walk a treadmill at their frequency, as resonance hybrid pendulum-spring model legs, frequencies +/-15%, +/-25%, +/-35% frequency. Walking resulted minimal metabolic costs maximal stability head joint actions. Mechanical energy conservation was constant across conditions. more stable than...
Abstract Charge transport by tunnelling is one of the most ubiquitous elementary processes in nature. Small structural changes a molecular junction can lead to significant difference single-molecule electronic properties, offering tremendous opportunity examine reaction on scale monitoring conductance changes. Here, we explore potential break technique detection photo-thermal photochromic dihydroazulene/vinylheptafulvene system. Statistical analysis experiments provides quantitative approach...
Chemistry of the Au-S interface at nanoscale is one most complex systems to study, as nature and strength bond change under different experimental conditions. In this using mechanically controlled break junction technique, we probed conductance analyzed Flicker noise for several aliphatic aromatic thiol derivatives thioethers. We demonstrate that can be used unambiguously differentiate between stronger chemisorption (Au-SR) weaker physisorption (Au-SRR') type interactions. The measurements...
The purpose of the study was to evaluate selected parameters describing performance characteristics a free-weight and isokinetic bench press. A secondary an attempt clarify technique requirements essential for successful lift. Parameters condition were generated from cinematographic data (150 fps) five trials each at 90 75% subject's maximal (1RM). Isokinetic obtained instrumented Cybex Power Bench Press two speeds corresponding average conditions. Despite differences, accommodation appeared...
HAMILL, J., B. T. BATES, and K. G. HOLT. Timing of lower extremity joint actions during treadmill running. Med. Sci. Sports Exerc., Vol. 24, No. 7, pp. 807–813, 1992. It has been suggested that a disruption in timing between the subtalar knee joints may be possible mechanism for injury. also documented shoe construction can alter rearfoot motion. The purpose study was to describe relationship support phase running while wearing different shoes. Twelve healthy subjects ran each three shoes...
Abstract We studied charge transport through core‐substituted naphthalenediimide (NDI) single‐molecule junctions using the electrochemical STM‐based break‐junction technique in combination with DFT calculations. Conductance switching among three well‐defined states was demonstrated by electrochemically controlling redox state of pendent diimide unit molecule an ionic liquid. The electrical conductances dianion and neutral differ more than one order magnitude. potential‐dependence...
The realization of self-assembled molecular-electronic films, whose room-temperature transport properties are controlled by quantum interference (QI), is an essential step in the scale-up QI effects from single molecules to parallel arrays molecules. Recently, effect destructive (DQI) on electrical conductance monolayers (SAMs) has been investigated. Here, through a combined experimental and theoretical investigation, we demonstrate chemical control different forms constructive (CQI)...
We report on the single-molecule electronic and thermoelectric properties of strategically chosen anthracene-based molecules with anchor groups capable binding to noble metal substrates, such as gold platinum. Specifically, we study effect different groups, well quantum interference, electric conductance thermopower gold/single-molecule/gold junctions generally find good agreement between theory experiments. All molecular display transport characteristics consistent coherent a Fermi...
The properties and dynamics of gold nanowires have been studied for decades as an important testbed several physical phenomena. Gold forming at contacts are integral part molecular junctions used to study the electronic thermal single molecules. However, huge discrepancy in timescales between experiments simulations, compounded by limited accuracy classical force fields, has posed a challenge accurately simulating realistic junctions. Here we show that machine-learning fields reveal new...
The properties and dynamics of gold nanowires have been studied for decades as an important testbed several physical phenomena. Gold forming at contacts are integral part molecular junctions used to study the electronic thermal single molecules. However, huge discrepancy in timescales between experiments simulations, compounded by limited accuracy classical force fields, has posed a challenge accurately simulating realistic junctions. Here we show that machine-learning fields reveal new...
Persistent contact sport participation exposes athletes to repetitive head impacts, eliciting lingering motor performance alterations that could disrupt visual perception. We sought compare and trunk displacement, segmental coordination, dynamic acuity between (ice hockey) noncontact (baseball) athletes. Thirteen ice hockey 11 baseball walked at preferred fast speeds during both a baseline an imposed (DVA) task. With increased task constraints walking speeds, greater vertical (preferred with...
A simple and fast analysis method to sort large data sets into groups with shared distinguishing characteristics is described, applied single molecular break junction conductance versus electrode displacement data. The method, based on principal component analysis, successfully sorted the projection of onto first or second correlation matrix without need assert any specific hypothesis about expected features within This was an improvement current approach because it automatically, making...