Discover the most talked about and latest scientific content & concepts.

Concept: Ruler


As the hardware of FLIM technique becomes mature, the most important criterion for FLIM application is the correct interpretation of its data. In this research, first of all, a more orthogonal phasor approach, called as Modified Phasor Approach (MPA), is put forward. It is a way to calculate the lifetime of the complex fluorescent process, and a rule to measure how much the fluorescence process deviates from single exponential decay. Secondly, MPA is used to analysis the time-resolved fluorescence processes of the transfected CHO-K1 Cell lines expressing adenosine receptor A1R tagged by CYP and YFP, measured in the channel of the acceptor. The image of the fluorescence lifetime and the multiplication of the fluorescence lifetime and deviation from single exponential decay reveal the details of the Homo-FRET. In one word, MPA provides the physical meaning in its whole modified phasor space, and broadens the way for the application of the fluorescence lifetime imaging.

Concepts: Fluorescence, Measurement, Radioactive decay, Computer program, Real number, Exponential function, English Channel, Ruler


Velocities and accelerations are measured and visualized in silicon microchannels using particle tracking velocimetry (PTV). Both pulsatile and stationary flows are generated in channels with different geometry. Distinct differences between flow regimes and geometries are shown. Flow separation occurred at Re = 84 for the channel with an expanded bifurcation shown by streamlines from long exposed images. Moving least squares are used to find the ensemble-averaged positions of the measured velocities from tracking. This is needed to find the local and convective accelerations.

Concepts: Fluid dynamics, General relativity, Measurement, Particle image velocimetry, Dimensional analysis, Ruler, Particle tracking velocimetry, Velocimetry


Current wound assessment practices are lacking on several measures. For example, the most common method for measuring wound size is using a ruler, which has been demonstrated to be crude and inaccurate. An increase in periwound temperature is a classic sign of infection but skin temperature is not always measured during wound assessments. To address this, we have developed a smartphone application that enables non-contact wound surface area and temperature measurements. Here we evaluate the inter-rater reliability and accuracy of this novel point-of-care wound assessment tool.

Concepts: Measurement, Psychometrics, Measuring instrument, Ruler


One of the most prominent tasks to measure spatial-conflict inhibitory control in preschoolers is the windows task (Russell et al., 1991, Br. J. Dev. Psychol., 9, 331). However, this task has been criticized given its high demands on abilities other than inhibition. The aim of the current set of studies was to establish the ‘car task’ as a novel instrument to assess conflict inhibition in children. In this task, children are asked to point at the current location of an occluded object. To do so, they have to inhibit a misleading colour cue in front of the locations in critical trials. In Study 1, we demonstrated that 3- to 6-year-old children’s (N = 88) performance in the car task correlated positively with that in the windows task (even after controlling for age). Study 2 investigated whether children’s failure in the car task might be caused by their inability to master the basic processes involved in the task rather than a lack of inhibition. We presented a new group of preschoolers (N = 85) with a modified version of the task without any misleading colour cues. Performance significantly improved, indicating that the difficulty of the car task lies in the necessity to inhibit the misleading colour cue leading towards the incorrect location. These findings suggest that the car task is a valid measurement of spatial-conflict inhibition in children. Statement of contribution What is already known on this subject? Inhibitory control (IC) is important for action planning and execution. One of the most prominent measurements of spatial-conflict IC is the windows task. This task has been criticized for additionally requiring rule inference to succeed. What does this study adds? Performance in the novel car task correlates with that in the windows task. Study 2 controls for demands other than IC such as memory or task difficulty. This task can thus be used to measure IC more purely without demanding rule inference.

Concepts: Measurement, Inhibitor, Novel, Control, Ruler, Rule of inference


Measurements of mid-upper arm circumference (MUAC) may result in measurement error due to incorrect placement along the arm or tight pulling of tape. To reduce the risk of these measurement errors, a new wider tape was developed.

Concepts: Measurement, Metrology, Psychometrics, Error, Test method, Uncertainty, Observational error, Ruler


The aim of this study was to explore the diverse clinimetric aspects of three-dimensional imaging measurements of TBSA in clinical practice compared with the methods currently used in clinical practice (i.e., the rule of nines and palm method) to measure TBSA in clinical practice.

Concepts: Clinical trial, Measurement, Integral, Measuring instrument, Area, Surface area, Ruler


[Purpose] The purpose of this study was to examine correlations between measurement time and different expansibility of the elastic tape on the rectus femoris and body sway index with plyometric exercise. [Subjects and Methods] The subjects of this study were 24 healthy men. C90 area, C90 angle, trace length, sway average velocity for body sway index were measured using a force plate by BT4. The collected data were analyzed using Kendall’s coefficient of concordance. [Results] All of body sway index on measuring follow up 24 hours after removing tape were significantly decreased than before and right after plyometric exercise. No significant correlations were found between body sway index and different expansibility of the elastic tape. [Conclusion] It appears that different expansibility of the elastic tape does not affect the ability to body sway index. Carry over effect of taping was verified on measuring follow up 24 hours after removing tape through the decreasing body sway index.

Concepts: Measurement, Exercise, Units of measurement, Quantity, Measuring instrument, Rectus femoris, Ruler, Timeline of time measurement technology


Detecting frailty in older adults scheduled for surgery is important to predict the occurrence of adverse outcomes, but because of its complexity, frailty screening is not commonly performed. The objective of the current study was to assess whether frailty can be screened for using automatically measured usual gait speed (UGS) and mid-arm circumference (MAC) in the outpatient clinic.

Concepts: Hospital, Psychometrics, English-language films, Ruler


There is a need for a valid, reliable, and easily applicable clinical measure of the length of the Achilles tendon (AT) after rupture. This study examines the reliability of a new ruler based measurement, the Achilles Tendon Length Measure (ATLM) in comparison with the goniometer-based Achilles Tendon Resting Angle (ATRA).

Concepts: Measurement, Psychometrics, Units of measurement, Measuring instrument, Tendon, Achilles tendon, Ruler, Achilles tendon rupture


We compared a goniometer method in a non-weight-bearing position with a tape measure method in a weight-bearing position to determine which was more reliable for assessing dorsiflexion range of motion (ROM) in children with cerebral palsy (CP).

Concepts: Psychometrics, Reliability, Cerebral palsy, Ruler, Dimensional instruments