PURPOSE To evaluate visual function in patients with early presbyopia using the functional visual acuity (FVA) test. METHODS This study included 27 eyes of 27 healthy older volunteers (mean age, 44.1 ± 2.6 years) and 14 eyes of 14 healthy young volunteers (mean age, 28.4±4.8 years). The distance-corrected visual acuity (DCVA), distance-corrected near VA (DCNVA), subjective amplitude of accomm...

Since numerous songs have recently been released increasingly, the genre of the song clustering is reasonably more important in terms of the audience’s choice. Also arguments for plagiarism are continuously being raised. For this reason, similarity measurement between two songs is important. In previous works, although similarity measurement has been actively researched in the field of query by...

Distance measurement results are hampered by systematic and accidental errors. The influence of systematic errors is reduced or eliminated mostly through the entering of appropriate corrections or through the use of a particular measurement method. A large number of different sources of corrections may be divided into three groups, namely into meteorological, geometric and projection correction...

A novel microcomputer-based ultrasonic distance measurement system is presented. This study proposes an efficient algorithm which combines both the amplitude modulation (AM) and the phase modulation (PM) of the pulse-echo technique. The proposed system can reduce error caused by inertia delay and amplitude attenuation effect when using the AM and PM envelope square wave form (APESW). The APESW ...

This article describes a bio-inspired method of identify the type of obstacles which could appear e.g. on the MAV’s (Micro Air Vehicles) way. The method is based on measurements made by a low-cost ultrasonic sensor. This kind of sensors are widely used for a distance measurement. The bio-inspired method used by ultrasound sensors uses echo of ultrasound signal to collect the knowledge about the...

In modern industrial geodesy, high demands are placed on the final accuracy, with expectations currently falling below 1 mm. The measurement methodology and surveying instruments used have to be adjusted to meet these stringent requirements, especially the total stations as the most often used instruments. A standard deviation of the measured distance is the accuracy parameter, commonly between...

An assessment of a non-invasive technique for measurement of stroke distance was made using a portable Doppler ultrasound machine. The aim was to determine the measurement error of repeated stroke distance measurements (Within-observer variability) and to assess measurement agreement between two operators (between-observer variability). The measurement error (within-observer variability) for bo...

In a strabismus clinic, measurement of distance stereopsis is particularly useful in the management of intermittent exotropia and esotropia of divergence paralysis type. This is mainly because reduction in the distance stereopsis is a sensitive sign of early deterioration of these strabismic disorders and generally makes a case for the surgical intervention [10]. Various tests have been used fo...

2 Measurement of Distance Three-dimensional position and shape measurement It is well known that ERIM (Environmental Research systems are widely used in industrial fields, but also in social environment fields. These are divided into 3 Institute of Michigan) developed 3 types of AM categories: distance measurement for navigation, position (Amplitude Modulated) laser radar in which ALV (Autonomo...

Figure 1: Two greatly different curves have a small Hausdroff distance Fréchet distance is a good similarity measurement for curves in Euclidean space. It can be simply described by a daily example. Suppose a dog and its owner are walking along two different paths (curves), connected by a leash. Both of them are moving continuously and forwards only, at any speed or even stop. Then length of th...