Abstract：
:When used in large, national surveillance programmes, objective measurement tools provide prevalence estimates of low physical activity guideline compliance and high amounts of sedentary time. There are undoubtedly a plethora of reasons for this but one possible contributing factor is the current lack of behavioural context offered by accelerometers and posture sensors. Context includes information such as where the behaviour occurs, the type of activity being performed and is vital in allowing greater refinement of intervention strategies. Novel technologies are emerging with the potential to provide this information. Example data from three ongoing studies is used to illustrate the utility of these technologies. Study one assesses the concurrent validity of electrical energy monitoring and wearable cameras as measures of television viewing. This study found that on average the television is switched on for 202 min d-1 but is visible in just 90 min of wearable camera images with a further 52 min where the participant is in their living room but the television is not visible in the image. Study two utilises indoor location monitoring to assess where older adult care home residents accumulate their sedentary time. This study found that residents were highly sedentary (sitting for an average of 720 min d-1) and spent the majority of their time in their own rooms with more time spent in communal areas in the morning than in the afternoon. Lastly, study three discusses the use of proximity sensors to quantify exposure to a height adjustable desk. These studies are example applications of this technology, with many other technologies available and applications possible. The adoption of these technologies will provide researchers with a more complete understanding of the behaviour than has previously been available.
journal_name
Physiol Measjournal_title
Physiological measurementauthors
Loveday A,Sherar LB,Sanders JP,Sanderson PW,Esliger DWdoi
10.1088/0967-3334/37/10/1834subject
Has Abstractpub_date
2016-10-01 00:00:00pages
1834-1851issue
10eissn
0967-3334issn
1361-6579journal_volume
37pub_type
杂志文章abstract：:A time-varying parametric spectrum estimation method for analysing non-stationary heart rate variability signals is presented. As a case study, the dynamics of heart rate variability during an orthostatic test is examined. In this method, the non-stationary signal is first modelled with a time-varying autoregressive m...
journal_title：Physiological measurement
pub_type： 临床试验,杂志文章
doi：10.1088/0967-3334/27/3/002
更新日期：2006-03-01 00:00:00
abstract：:The purpose of this study was to examine the performance of dual-energy computed tomography (DECT) for the quantification of liver fat content (LFC). We prepared two phantoms: homogenized mixtures of porcine liver and fat and homogeneous mixtures of liver- and fat-equivalent solutions. Tubes containing mixtures with k...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/35/4/597
更新日期：2014-04-01 00:00:00
abstract：OBJECTIVE:To compare a novel cardiovascular magnetic resonance technique for the assessment of left ventricular (LV) mechanical discoordination by characterizing the endocardial center motion (ECM) in short-axis cine MRI in healthy volunteers and heart failure patients with left bundle branch block (HF-LBBB). APPROACH...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/1361-6579/aaaaa0
更新日期：2018-02-28 00:00:00
abstract：:Muscle injuries in the lower limb are common among professional football players. Classification is made according to severity and is diagnosed with radiological assessment as: grade I (minor strain or minor injury), grade II (partial rupture, moderate injury) and grade III (complete rupture, severe injury). Tetrapola...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/36/1/27
更新日期：2015-01-01 00:00:00
abstract：:In this paper we present the concept, the design and the test procedure for a DSP-based high-precision and high-performance wide-band (up to 10 MHz) bioimpedance analyser module for application in EIT or bioimpedance spectroscopy. The module implements a digital concept with appropriate signal conditioning hardware fo...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/22/1/303
更新日期：2001-02-01 00:00:00
abstract：:Imaging photoplethysmography is a relatively new technique for extracting biometric information from video images of faces. This is useful in non-invasive monitoring of patients including neonates or the aged, with respect to sudden infant death syndrome, sleep apnoea, pulmonary disease, physical or mental stress and ...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/36/1/67
更新日期：2015-01-01 00:00:00
abstract：:In magnetic resonance electrical impedance tomography (MREIT) we inject currents through electrodes placed on the surface of a subject and try to reconstruct cross-sectional resistivity (or conductivity) images using internal magnetic flux density as well as boundary voltage measurements. In this paper we present a st...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/24/2/367
更新日期：2003-05-01 00:00:00
abstract：:The increasing use of EIT in clinical research on severely ill lung patients requires a clarification of the influence of pathologic impedance distributions on the validity of the resulting tomograms. Significant accumulation of low-conducting air (e.g. pneumothorax or emphysema) or well-conducting liquid (e.g. haemat...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/27/5/S16
更新日期：2006-05-01 00:00:00
abstract：:The aim of this study was to analyse the feasibility of long-term measurements of cerebral (crSO2) and peripheral (prSO2) regional tissue oxygen saturation on the first day of life by determining the amount of artefacts and their influence on rSO2. Near infrared spectroscopy (NIRS) measurements were performed fronto-p...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/35/7/1349
更新日期：2014-07-01 00:00:00
abstract：:External defibrillation requires the application of high voltage electrical impulses via large external electrodes, placed on selected locations on the thorax surface. The position of the electrodes is one of the major determinants of the transthoracic impedance (TTI) which influences the intracardiac current flow dur...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/27/10/007
更新日期：2006-10-01 00:00:00
abstract：:Sleep-wake patterns are often significantly disturbed in critically ill patients. This disturbance is closely linked to secondary brain dysfunctions in these patients. Sedation not only impairs sleep quality in ICU patients but also has detrimental effects on short- and long-term outcome. In other contexts, light ther...
journal_title：Physiological measurement
pub_type： 杂志文章,评审
doi：10.1088/0967-3334/37/9/R73
更新日期：2016-09-01 00:00:00
abstract：:We used the finite element (FE) method to estimate the spatial sensitivity of a needle electrode for bioimpedance measurements. This current conducting needle with an insulated shaft was inserted in a saline solution and the current was measured at the neutral electrode. Model resistance and reactance were calculated ...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/31/10/006
更新日期：2010-10-01 00:00:00
abstract：:Arterial pCO2 is known to influence cerebral autoregulation but its effect on the dynamic relationship between mean arterial blood pressure (ABP) and mean cerebral blood flow velocity (CBFV), obtained from spontaneous fluctuations in ABP, has not been established. In 16 normal subjects, ABP was measured non-invasively...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/20/3/304
更新日期：1999-08-01 00:00:00
abstract：:Although previous studies have established the feasibility of monitoring esophageal temperature during radiofrequency cardiac ablation using an esophageal temperature probe (ETP), some questions remain regarding its efficacy. The aims of this study were to study the effect of the location of the ETP on the temperature...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/28/5/001
更新日期：2007-05-01 00:00:00
abstract：:Capnography is a continuous and noninvasive method for carbon dioxide (CO2) measurement, and it has become the standard of care for basic respiratory monitoring for intubated patients in the intensive care unit. In addition, it has been used to adjust ventilatory parameters during mechanical ventilation (MV). However,...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/36/2/231
更新日期：2015-02-01 00:00:00
abstract：:Plethysmographic measurement of airway resistance (R(aw)) has been determined by single-point analysis, usually at 50% of maximum inspiratory flow (MIF). Computer-assisted (best fit) analysis, however, allows R(aw) to be calculated by applying a regression line to any portion of the plethysmograph pressure-flow loop. ...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/23/2/304
更新日期：2002-05-01 00:00:00
abstract：:Extension of the frequency range of electrical impedance myography (EIM) to 2 MHz discloses a major rise in the reactance of muscle above 3-500 kHz, together with a slow decrease in the resistance consonant with the Kramers-Kronig relations. This 'upturn' phenomenon is found when the distant current electrode configur...
journal_title：Physiological measurement
pub_type： 临床试验,杂志文章
doi：10.1088/0967-3334/29/6/S29
更新日期：2008-06-01 00:00:00
abstract：OBJECTIVE:Predictive analytics monitoring that informs clinicians of the risk for failed extubation would help minimize both the duration of mechanical ventilation and the risk of emergency re-intubation in ICU patients. We hypothesized that dynamic monitoring of cardiorespiratory data, vital signs, and lab test result...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/1361-6579/aace95
更新日期：2018-07-16 00:00:00
abstract：:Skinfold anthropometry is a widely practiced technique often with little appreciation of its limitations. The large residual error appearing in any regressions of body density versus sums of skinfolds is primarily due to biological causes, in particular the non-constancy of the ratio of subcutaneous to total body fat....
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/19/3/008
更新日期：1998-08-01 00:00:00
abstract：:Electrical impedance tomography (EIT) is a recent imaging technique based on electrical impedance, offering the possibility of measuring pulmonary perfusion. In the present study the influence of several pulmonary haemodynamical parameters on the EIT signal were investigated. First, the influence on the systolic wave ...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/19/2/013
更新日期：1998-05-01 00:00:00
abstract：:This paper investigates the main characteristics of the magneto-hemodynamic (MHD) response for application as a biomarker of vascular blood flow. The induced surface potential changes of a volunteer exposed to a 3 T static B0 field of a magnetic resonance imaging (MRI) magnet were measured over time at multiple locati...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/33/2/117
更新日期：2012-02-01 00:00:00
abstract：:Fetal motility is a widely accepted indicator of the well-being of a fetus. In previous research, it has be shown that fetal motion (FM) is coherent with fetal heart rate accelerations and an indicator for active/rest cycles of the fetus. The most common approach for FM and fetal heart rate (FHR) assessment is by Dopp...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/37/11/2003
更新日期：2016-11-01 00:00:00
abstract：OBJECTIVE:Video and sound acquisition and processing technologies have seen great improvements in recent decades, with many applications in the biomedical area. The aim of this paper is to review the overall state of the art of advances within these topics in paediatrics and to evaluate their potential application for ...
journal_title：Physiological measurement
pub_type： 杂志文章,评审
doi：10.1088/1361-6579/ab0096
更新日期：2019-02-26 00:00:00
abstract：:Idiopathic normal pressure hydrocephalus (INPH) patients have a disturbance in the dynamics of the cerebrospinal fluid (CSF) system. The outflow conductance, C, of the CSF system has been suggested to be prognostic for positive outcome after treatment with a CSF shunt. All current methods for estimation of C have draw...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/28/11/003
更新日期：2007-11-01 00:00:00
abstract：:Long-term electrocardiography (ECG) featuring adequate atrial and ventricular signal quality is highly desirable. Routinely used surface leads are limited in atrial signal sensitivity and recording capability impeding complete ECG delineation, i.e. in the presence of supraventricular arrhythmias. Long-term esophageal ...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/35/4/517
更新日期：2014-04-01 00:00:00
abstract：:A gamma fit facilitates smoothing and extrapolation of distorted tracer-dilution curves in blood flow studies. Theoretically based empirical estimators were developed as simple alternatives to direct regression approaches from simulated gamma distributions with a wide range of shape asymmetry. Key curve features of pe...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/22/4/401
更新日期：2001-11-01 00:00:00
abstract：:The ability to image the impedance changes that accompany neuronal depolarization in the brain would constitute a major advance in neuroscience technology. Unfortunately, these changes are likely to be small and rapid and so difficult to measure. The impedance change at frequencies above 10 kHz, as used by conventiona...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/16/3a/009
更新日期：1995-08-01 00:00:00
abstract：:The wrist is increasingly being used as the preferred site for objectively assessing physical activity but the relative accuracy of processing methods for wrist data has not been determined. OBJECTIVE:This study evaluates the validity of four processing methods for wrist-worn ActiGraph (AG) data against energy expend...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/1361-6579/aa6d00
更新日期：2017-06-01 00:00:00
abstract：:A magnetic pulse generator has been set up in order to study gastric activity. Two coils 1.05 m in diameter, arranged in a Helmholtz configuration, were used. The system generated magnetic field pulses higher than 15 mT, of duration 17.3+/-1.2 ms. Measurements were performed in 11 male volunteers, with average age 29....
journal_title：Physiological measurement
pub_type： 临床试验,杂志文章
doi：10.1088/0967-3334/25/5/015
更新日期：2004-10-01 00:00:00
abstract：:This paper describes the design, construction, and testing of a multi-channel fetal electrocardiogram (fECG) signal generator based on LabVIEW. Special attention is paid to the fetal heart development in relation to the fetus' anatomy, physiology, and pathology. The non-invasive signal generator enables many parameter...
journal_title：Physiological measurement
pub_type： 杂志文章
doi：10.1088/0967-3334/37/2/238
更新日期：2016-02-01 00:00:00
