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Results 201 - 250 of 2263
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Liu Shaopeng - - 2012
Non-invasive estimation of minute ventilation is important for quantifying the intensity of physical activity of individuals. In this paper, several improved regression models are presented, based on the measurement of chest and abdomen movements from sensor belts worn by subjects (n = 50) engaged in 14 types of physical activity. ...
Chen Kong Y - - 2012
Because physical activity researchers are increasingly using objective portable devices, this review describes the current state of the technology to assess physical activity, with a focus on specific sensors and sensor properties currently used in monitors and their strengths and weaknesses. Additional sensors and sensor properties desirable for activity measurement ...
Bassett David R DR - - 2012
Wearable monitors are increasingly being used to objectively monitor physical activity in research studies within the field of exercise science. Calibration and validation of these devices are vital to obtaining accurate data. This article is aimed primarily at the physical activity measurement specialist, although the end user who is conducting ...
Skubik-Peplaski Camille - - 2012
ABSTRACT A study was conducted to explore occupational therapists' perceptions of rehabilitation environments and the influence of these perceptions on practice and occupational interventions. Traditionally, inpatient occupational therapists have a choice of intervention environments, ranging from a gym-like to a more home-like setting. Choosing to provide interventions in these different ...
Ferguson Brent W - - 2012
Loss of WWOX expression has been reported in many different cancers including breast cancer. Elucidating the function of this gene in adult tissues has not been possible with full Wwox knockout models. Here we characterize the first conditional models of Wwox ablation in mouse mammary epithelium utilizing two transgenic lines ...
Butte Nancy F NF US Department of Agriculture/Agricultural Research Service Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX 77030, USA. - - 2012
Physical activity may be defined broadly as "all bodily actions produced by the contraction of skeletal muscle that increase energy expenditure above basal level." Physical activity is a complex construct that can be classified into major categories qualitatively, quantitatively, or contextually. The quantitative assessment of physical activity using wearable monitors ...
Heil Daniel P DP Department of Health and Human Development, Movement Science/Human Performance Lab, Montana State University, Bozeman, MT 59717-3360, USA. - - 2012
Although the measurement of physical activity with wearable monitors may be considered objective, consensus guidelines for collecting and processing these objective data are lacking. This article presents an algorithm embodying best practice recommendations for collecting, processing, and reporting physical activity data routinely collected with accelerometry-based activity monitors. This algorithm is ...
Wagner Rojay R Electrical and Computer Engineering Department, University of Massachusetts, Amherst, MA 01003, - - 2012
Gait analysis systems are powerful tools in the monitoring and rehabilitation of many health conditions which result in an altered gait (such as Parkinson's disease and rheumatoid arthritis), along with the injury of lower limbs. However, current systems that provide accurate gait monitoring and analysis are large and expensive, and ...
Corbett Elaine A EA Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA. - - 2012
For rehabilitative devices to restore functional movement to paralyzed individuals, user intent must be determined from signals that remain under voluntary control. Tracking eye movements is a natural way to learn about an intended reach target and, when combined with just a small set of electromyograms (EMGs) in a probabilistic ...
Chien Chieh - - 2012
A system that reliably classifies daily life activities can contribute to more effective and economical treatments for patients with chronic conditions or undergoing rehabilitative therapy. We propose a universal hybrid decision tree classifier for this purpose. The tree classifier can flexibly implement different decision rules at its internal nodes, and ...
Obdrzálek Stepán S Department of Electrical Engineering and Computer Sciences, University of Californiaat Berkeley, Berkeley, CA 94720, USA. - - 2012
The Microsoft Kinect camera is becoming increasingly popular in many areas aside from entertainment, including human activity monitoring and rehabilitation. Many people, however, fail to consider the reliability and accuracy of the Kinect human pose estimation when they depend on it as a measuring system. In this paper we compare ...
Christ O O Department of Human Science, Work and Engineering Psychology Research Group, Technische Universität Darmstadt, 64283 Darmstadt, Germany. - - 2012
After an amputation, processes of change in the body image as well as a change in body scheme have direct influences on the quality of living in every patient. Within this paper, a paradigm of experimental induced body illusion (the Rubber Hand Illusion, RHI) is integrated in a prosthetic hardware ...
Gabel Moshe M The Department of Computer Science, Technion - Israel Institute of Technology, Israel. - - 2012
Human gait is an important indicator of health, with applications ranging from diagnosis, monitoring, and rehabilitation. In practice, the use of gait analysis has been limited. Existing gait analysis systems are either expensive, intrusive, or require well-controlled environments such as a clinic or a laboratory. We present an accurate gait ...
Feng-Shun Lin Jonathan J Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada. - - 2012
This paper proposes an approach for the automated segmentation and identification of movement segments from continuous time series data of human movement, collected through motion capture of ambulatory sensors. The proposed approach uses a two stage identification and recognition process, based on velocity and stochastic modeling of each motion to ...
Rohafza Maryam M New Jersey Institute of Technology, Newark, NJ 07102, USA. - - 2012
One of the obstacles in the development of rehabilitation robotics has been inadequacy in the measurement of treatment effects due to interventions. A measurement tool that will efficiently produce a large reliable sample of measurements collected during a single session that can also produce a rich set of data which ...
Han Euna - - 2011
BACKGROUND: Secondary data is often necessary to assess the availability of commercial physical activity (PA) facilities and examine its association with individual behaviors and outcomes, yet the validity of such sources has been explored only in a limited number of studies. METHODS: Field data were collected on the presence and ...
Andaluri Gangadhar - - 2011
The growing interest in sonochemistry as a tool for environmental remediation leads to the need for process optimization. Sonochemistry is a complex process, which depends on physical parameters and also on the process conditions. Physical parameters are interrelated and therefore a systematic approach has to be taken to optimize the ...
Gundy Chad M - - 2012
To investigate the statistical fit of alternative higher order models for summarizing the health-related quality of life profile generated by the EORTC QLQ-C30 questionnaire. A 50% random sample was drawn from a dataset of more than 9,000 pre-treatment QLQ-C30 v 3.0 questionnaires completed by cancer patients from 48 countries, differing ...
Purdy Sarah E - - 2011
We surveyed montane meadows in the northern Sierra Nevada and southern Cascades for two field seasons to compare commonly used aquatic and terrestrial-based assessments of meadow condition. We surveyed (1) fish, (2) reptiles, (3) amphibians, (4) aquatic macroinvertebrates, (5) stream geomorphology, (6) physical habitat, and (7) terrestrial vegetation in 79 ...
de Oliveira Marilia Mitidieri F - - 2011
Investigations surrounding the variability of productivity in upwelling regions are necessary for a better understanding the physical-biological coupling in these regions by monitoring systems of environmental impacts according to the needs of the regional coastal management. Using a spatial and temporal database from National Centers for Environmental Prediction (NCEP) and ...
Brown Harvey R - - 2011
From its first significant appearance in physics, the notion of probability has been linked in the minds of physicists with the notion of uncertainty. But the link may prove to be tenuous, if quantum mechanics, construed in terms of the Everett interpretation, is anything to go by.
Hugtenburg Richard P - - 2011
Physical models are increasingly used to predict acute and late effects resulting from radiation therapy. These models utilise measured and calculated microdosimetric quantities, and are increasingly used to determine the significant corrections for effective dose used in ion-beam therapy, neutron therapy and boron neutron-capture therapy. The relative biological effect (RBE) ...
Knauer Katja - - 2011
A mesocosm study with three photosystem-II inhibitors and an equipotent mixture was performed to address the value of functional and structural endpoints in evaluating the impact of herbicides on aquatic systems. The herbicides atrazine, diuron, and isoproturon were dosed in the ratio of their relative potencies as HC30 for the ...
Liu S - - 2011
This paper presents a sensor fusion method for assessing physical activity (PA) of human subjects, based on support vector machines (SVMs). Specifically, acceleration and ventilation measured by a wearable multi-sensor device on 50 test subjects performing 13 types of activities of varying intensities are analyzed, from which activity type and ...
Wiesenfeld Kurt - - 2011
We develop a generic iterative map model of coupled oscillators based on simple physical processes common to many such systems. The model allows us to understand, from a unified perspective, the range of different outcomes reported for experiments by Huygens and modern realizations of his two coupled clocks.
Smith Beth A BA Balance Disorders Laboratory, Departments of Neurology and Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon, USA. - - 2011
Greater gait variability has been observed in persons with Down syndrome (DS). An understanding of baseline patterns of variability, how these patterns relate to adaptive control of gait, and whether increasing or decreasing variability is better is necessary for physical therapists to determine whether and when to intervene. Our aim ...
Monzani B - - 2011
BACKGROUND: Dysmorphic concern refers to an excessive preoccupation with a perceived or slight defect in physical appearance. It lies on a continuum of severity from no or minimal concerns to severe concerns over one's appearance. The present study examined the heritability of dysmorphic concerns in a large sample of twins.MethodTwins ...
Nelson Matthew John - - 2011
A question that still complicates interpretation of local field potentials (LFPs) is how electrode properties like impedance, size and shape affect recorded LFPs. Additionally, how any such effects should be considered when comparing LFP, electroencephalogram (EEG) or electrocorticogram (ECoG) data has not been clearly described. A generally accepted concrete physical ...
Schott T C - - 2011
OBJECTIVE: To determine how gap opening is affected by the activation intervals of expansion screws in removable orthodontic appliances and which gap widths are achievable during therapy. MATERIALS AND METHODS: In this retrospective study, the increases in gap widths for transverse and distalizing screws activated at 7- and 14-day intervals ...
Albano Giuseppina - - 2011
We consider a diffusion model based on a generalized Gompertz deterministic growth in which carrying capacity depends on the initial size of the population. The drift of the resulting process is then modified by introducing a time-dependent function, called "therapy", in order to model the effect of an exogenous factor. ...
Morgan Thomas John - - 2011
'Standard' or 'extracellular' base excess (SBE) is a modified calculation using one-third the normal hemoglobin concentration. It is a 'CO(2)-invariant' expression of meta- bolic acid-base status integrated across interstitial, plasma and erythrocytic compartments (IPE). SBE also integrates conflicting physical chemical influences on metabolic acid-base status. Until recently attempts to quantify ...
Frese Malte C - - 2011
PURPOSE: The physical and potential biological advantages of proton and carbon ions have not been fully exploited in radiation therapy for the treatment of cancer. In this work, an approach to predict proton and carbon ion relative biological effectiveness (RBE) in a representative spread-out Bragg peak (SOBP) is derived using ...
Jin Jing-Wen - - 2011
Spectral measurements of complex heterogeneous types of mixture samples are often affected by significant multiplicative effects resulting from light scattering, due to physical variations (e.g. particle size and shape, sample packing and sample surface, etc.) inherent within the individual samples. Therefore, the separation of the spectral contributions due to variations ...
Jiménez-Pavón David - - 2011
OBJECTIVE: To examine the association of physical activity and fitness with leptin concentrations in European adolescents, after taking into account several potential confounders including total body fat (TBF). STUDY DESIGN: We conducted a cross-sectional study in a school setting for the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional ...
Chatrchyan S - - 2011
A study of events with missing transverse energy and an energetic jet is performed using pp collision data at a center-of-mass energy of 7 TeV. The data were collected by the CMS detector at the LHC, and correspond to an integrated luminosity of 36  pb^{-1}. An excess of these events over standard ...
Li Jianing - - 2011
Accurate prediction of drug metabolism is crucial for drug design. Since a large majority of drugs metabolism involves P450 enzymes, we herein describe a computational approach, IDSite, to predict P450-mediated drug metabolism. To model induced-fit effects, IDSite samples the conformational space with flexible docking in Glide followed by two refinement ...
Gleeson Michael R - - 2011
An understanding of the photochemical and photo-physical processes, which occur during photopolymerization is of extreme importance when attempting to improve a photopolymer material's performance for a given application. Recent work carried out on the modelling of the mechanisms which occur in photopolymers during- and post-exposure, has led to the development ...
Mathew Merly - - 2011
Abstract Purpose . Investigate relations between demographic characteristics and submission method, Internet or paper, when physical activity behaviors are reported. Design . Observational. Setting . Metropolitan. Subjects . Adult women (N  =  918) observed weekly for 2 years (total number of weekly reports, 44,963). Measures . Independent variables included age, race, ...
Saint-Maurice Pedro F - - 2011
The System for Observing Play and Leisure Activities (SOPLAY) is a direct observation instrument designed to assess group physical activity and environmental contexts. The purpose of this study was to test the convergent validity of the SOPLAY using temporally matched data from an accelerometry-based activity monitor. Accelerometry-based physical activity data ...
Zilcha-Mano Sigal - - 2011
John Bowlby's ( 1973 , 1980 , 1982 ) attachment theory is one of the most influential theories in personality and developmental psychology and provides insights into adjustment and psychopathology across the lifespan. The theory is also helpful in defining the target of change in psychotherapy, understanding the processes by ...
Krenn Patricia J PJ Institute of Sport Science, University of Graz, Austria. - - 2011
The GPS represents an innovative way to objectively assess the spatial locations of physical activity behavior. The aim of this systematic review was to determine the capability of GPS to collect high-quality data on the location of activities in research on the relationship between physical activity and the environment. Published ...
Weng Lindong - - 2011
Thermodynamic and kinetic models can provide a wealth of information on the physical response of living cells and tissues experiencing cryopreservation procedures. Both isothermal and nonisothermal models have been proposed so far, accompanied by experimental verification and cryo-applications. But the cryoprotective solution is usually assumed to be dilute and ideal ...
Aaltonen T - - 2011
We present a search for new physics in events with two high p_{T} leptons of the same electric charge, using data with an integrated luminosity of 6.1  fb^{-1}. The observed data are consistent with standard model predictions. We set 95% C.L. lower limits on the mass of doubly charged scalars decaying ...
Yamanaka Tsuyuko - - 2011
1. The nature of abundance-body size relationships in animal communities, and especially the drivers behind the observed patterns, have been a focus of persistent debate in animal ecology. In a recent review, Allen et al. (2006) categorized five mechanistic explanations behind the commonly observed polymodality in these relationships: energetic constraints; phylogenetic constraints; ...
Zhang Shaoyan - - 2011
INTRODUCTION:: Most accelerometer-based activity monitors are worn on the waist or lower back for assessment of habitual physical activity. Output is in arbitrary counts that can be classified by activity intensity according to published thresholds. The purpose of this study was to develop methods to classify physical activities into walking, ...
Bader Rolf - - 2011
A real-time physical model of the Banjo as proposed by Pfeifle and Bader [J. Acoust. Soci. Am. (2009)] is extended with nonlinear effects on the membrane resulting from the added force of the bridge and the thereby arising anisotropic tension distribution on the membrane. It is shown that this effect ...
Woolfe Katherine F - - 2011
Development of computational models to predict underwater noise from impact pile driving is limited because of the difficulty and cost involved in collecting acoustic field data for model verification during construction activities. To alleviate this situation, a scaled physical model for marine pile driving was designed and implemented in a ...
Vermot Julien - - 2011
In April 2011, researchers from diverse background met at the Gulbenkian Institute (Oeiras, Portugal) to discuss the emerging input of biophysics into the field of developmental biology. The scope of the workshop was to bring together scientists working in different model systems and to discuss some of the most recent ...
Fackler Cameron - - 2011
Bayesian inference is applied to the problem of determining the physical parameters of a rigid-frame porous material. Such materials may be characterized by the parameters of flow resistivity, porosity, and tortuosity. The Biot-Allard and Attenborough models predict the propagation of sound in rigid-frame porous materials by modeling the characteristic impedance ...
Chotiros Nicholas P - - 2011
The development of geo-physical descriptions of the sediment and models to predict the acoustic properties are critical to the application of sediment acoustics. The former follow standard geo-physical methods of sediment classification, based on grain size, density, and other physical descriptors. The latter started as a fluid approximation, followed by ...
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