THE REAL LIMITS OF ACCURACY OF MEASUREMENTS   OF VARIOUS STRUCTURES USING MODERN ULTRASOUND  DIAGNOSTIC EQUIPMENT

Objectives: The reliability of objective measurements on digital laryngeal images was investigated. Methods: The magnitude of the error of measurement of surface areas by visually tracing the outline was determined for three different areas: the area of the lesion and, during vibration, the glottal area on maximal opening of the vocal folds and the glottal area on maximal closing of the vocal folds. Results: The errors in these areas were 10% to 30%. The results suggest that the error is mainly due to the uncertainty of the real outline of areas with a vague boundary. Correction for differences in magnification between two images (posttherapy and pretherapy) is of importance in about 25% to 65% of cases, depending on the area measured. Conclusions: Only when the magnification ratio is small (less than about ±10% from 1.0) may a correction not be necessary.

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Evaluating Mental Health Services; How Do Programs for Children “Work” in the Real World? Edited by Carol T. Nixon & Denine A. Northrup. Sage, Thousand Oaks CA, 1997. pp. 306. £16.60 (pb).

Journal of Child Psychology and Psychiatry ◽

10.1017/s0021963098222918 ◽

1998 ◽

Vol 39 (6) ◽

pp. 935-936

Author(s):

Anne Worrall-Davies

Keyword(s):

Mental Health ◽

Mental Health Services ◽

Health Services ◽

Real World ◽

The Real

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Large-scale Motion of Solar Filaments

International Astronomical Union Colloquium ◽

10.1017/s0252921100064502 ◽

2000 ◽

Vol 179 ◽

pp. 205-208

Author(s):

Pavel Ambrož ◽

Alfred Schroll

Keyword(s):

Magnetic Flux ◽

Proper Motion ◽

Time Scale ◽

Large Scale ◽

Accuracy Of Measurements ◽

Solar Filaments ◽

General Movement ◽

Scale Motion ◽

Velocity Scatter

AbstractPrecise measurements of heliographic position of solar filaments were used for determination of the proper motion of solar filaments on the time-scale of days. The filaments have a tendency to make a shaking or waving of the external structure and to make a general movement of whole filament body, coinciding with the transport of the magnetic flux in the photosphere. The velocity scatter of individual measured points is about one order higher than the accuracy of measurements.

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Kinematical and Dynamical CBED Pattern Models: Increasing the Accuracy of the Unit-Cell Parameter Measurements Based on CBED Patterns

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100136301 ◽

1990 ◽

Vol 48 (2) ◽

pp. 540-541

Author(s):

I.N. Yadhikov ◽

S.K. Maksimov

Keyword(s):

Reciprocal Lattice ◽

Unit Cell ◽

Reciprocal Lattice Vector ◽

Unit Cell Parameters ◽

Lattice Vector ◽

Cell Parameters ◽

Accuracy Of Measurements ◽

The Difference ◽

Image Position ◽

Convergent Beam

Convergent beam electron diffraction (CBED) is widely used as a microanalysis tool. By the relative position of HOLZ-lines (Higher Order Laue Zone) in CBED-patterns one can determine the unit cell parameters with a high accuracy up to 0.1%. For this purpose, maps of HOLZ-lines are simulated with the help of a computer so that the best matching of maps with experimental CBED-pattern should be reached. In maps, HOLZ-lines are approximated, as a rule, by straight lines. The actual HOLZ-lines, however, are different from the straights. If we decrease accelerating voltage, the difference is increased and, thus, the accuracy of the unit cell parameters determination by the method becomes lower.To improve the accuracy of measurements it is necessary to give up the HOLZ-lines substitution by the straights. According to the kinematical theory a HOLZ-line is merely a fragment of ellipse arc described by the parametric equationwith arc corresponding to change of β parameter from -90° to +90°, wherevector, h - the distance between Laue zones, g - the value of the reciprocal lattice vector, g‖ - the value of the reciprocal lattice vector projection on zero Laue zone.

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Scanning electron microscopy of human iliac bone by a simple preparation method

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100158674 ◽

1990 ◽

Vol 48 (3) ◽

pp. 226-227

Author(s):

Toshihiko Takita ◽

Tomonori Naguro ◽

Toshio Kameie ◽

Akihiro Iino ◽

Kichizo Yamamoto

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Preparation Method ◽

Specimen Preparation ◽

Real Surface ◽

Public Attention ◽

Preparation Methods ◽

The Real ◽

Simple Preparation ◽

Scanning Electron

Recently with the increase in advanced age population, the osteoporosis becomes the object of public attention in the field of orthopedics. The surface topography of the bone by scanning electron microscopy (SEM) is one of the most useful means to study the bone metabolism, that is considered to make clear the mechanism of the osteoporosis. Until today many specimen preparation methods for SEM have been reported. They are roughly classified into two; the anorganic preparation and the simple preparation. The former is suitable for observing mineralization, but has the demerit that the real surface of the bone can not be observed and, moreover, the samples prepared by this method are extremely fragile especially in the case of osteoporosis. On the other hand, the latter has the merit that the real information of the bone surface can be obtained, though it is difficult to recognize the functional situation of the bone.

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Personal Audio System: Hearing Symptoms, Habits, and Sound Pressure Levels Measured in Real Ear and a Manikin

Journal of Speech Language and Hearing Research ◽

10.1044/2020_jslhr-19-00053 ◽

2020 ◽

Vol 63 (6) ◽

pp. 2016-2026

Author(s):

Tamara R. Almeida ◽

Clayton H. Rocha ◽

Camila M. Rabelo ◽

Raquel F. Gomes ◽

Ivone F. Neves-Lobo ◽

...

Keyword(s):

Sound Pressure ◽

Daily Basis ◽

Cross Sectional Study ◽

Normal Hearing ◽

Chi Square ◽

Cross Sectional ◽

The Real ◽

Significant Difference ◽

Sound Pressure Levels ◽

Audio System

Purpose The aims of this study were to characterize hearing symptoms, habits, and sound pressure levels (SPLs) of personal audio system (PAS) used by young adults; estimate the risk of developing hearing loss and assess whether instructions given to users led to behavioral changes; and propose recommendations for PAS users. Method A cross-sectional study was performed in 50 subjects with normal hearing. Procedures included questionnaire and measurement of PAS SPLs (real ear and manikin) through the users' own headphones and devices while they listened to four songs. After 1 year, 30 subjects answered questions about their usage habits. For the statistical analysis, one-way analysis of variance, Tukey's post hoc test, Lin and Spearman coefficients, the chi-square test, and logistic regression were used. Results Most subjects listened to music every day, usually in noisy environments. Sixty percent of the subjects reported hearing symptoms after using a PAS. Substantial variability in the equivalent music listening level (Leq) was noted ( M = 84.7 dBA; min = 65.1 dBA, max = 97.5 dBA). A significant difference was found only in the 4-kHz band when comparing the real-ear and manikin techniques. Based on the Leq, 38% of the individuals exceeded the maximum daily time allowance. Comparison of the subjects according to the maximum allowed daily exposure time revealed a higher number of hearing complaints from people with greater exposure. After 1 year, 43% of the subjects reduced their usage time, and 70% reduced the volume. A volume not exceeding 80% was recommended, and at this volume, the maximum usage time should be 160 min. Conclusions The habit of listening to music at high intensities on a daily basis seems to cause hearing symptoms, even in individuals with normal hearing. The real-ear and manikin techniques produced similar results. Providing instructions on this topic combined with measuring PAS SPLs may be an appropriate strategy for raising the awareness of people who are at risk. Supplemental Material https://doi.org/10.23641/asha.12431435

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Current Issues: Evidence-Based Practice for the Real World: Thoughts on Clinical Education in Communication Disorders

Perspectives on Administration and Supervision ◽

10.1044/aas20.3.100 ◽

2010 ◽

Vol 20 (3) ◽

pp. 100-105 ◽

Cited By ~ 3

Author(s):

Anne K. Bothe

Keyword(s):

Clinical Education ◽

Real World ◽

Evidence Based Practice ◽

Communication Disorders ◽

University Faculty ◽

Evidence Based ◽

Speech Language Pathology ◽

Basic Principles ◽

The Real ◽

Language Pathology

This article presents some streamlined and intentionally oversimplified ideas about educating future communication disorders professionals to use some of the most basic principles of evidence-based practice. Working from a popular five-step approach, modifications are suggested that may make the ideas more accessible, and therefore more useful, for university faculty, other supervisors, and future professionals in speech-language pathology, audiology, and related fields.

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