scholarly journals Validitas dan Reliabilitas Pengukuran Posisi Horizontal Menton dalam Penilaian Kesimetrisan Mandibulofasial (Kajian Sefalometri Postero-Anterior)

2018 ◽  
Vol 1 (1) ◽  
pp. 156-162
Author(s):  
Trelia Boel ◽  
Maria Purbiati ◽  
Ervina Sofyanti ◽  
Erliera Erliera
Keyword(s):  
Gold Standard ◽  
Group Symmetry ◽  
Radiographic Imaging ◽  
Validity And Reliability ◽  
Imaging Results ◽  
Anatomical Point ◽  
Measurement Results ◽  
Preliminary Study ◽  
Influence Measurement ◽  
Cephalometric Measurements

Latar belakang : Pengukuran sefalometri melibatkan penentuan titik-titik anatomis secara objektif namun juga dapat melibatkan subjektifitas pengukur dengan faktor-faktor yang dapat mempengaruhi hasil pengukuran. Dalam hal ini dibutuhkan pengujian untuk mendapatkan validitas dan reliabilitas pengukuran yang baik sehingga analisis dari hasil pengukuran dinilai akurat dan layak. Perkembangan radiografi digital yang didukung dengan perangkat lunak memudahkan operator dalam interpretasi hasil pencitraan radiografi secara kuantitatif dan kualitatif. Metode : Titik Menton (Me) merupakan titik anatomis yang sering dipakai sebagai acuan bagi penentuan kesimetrisan wajah secara horizontal pada sefalogram Postero-Anterior. Untuk membuktikan validitas pengukuran, dilakukan uji kesesuaian pada kelompok asimetri, kelompok simetri dan kelompok gabungan atas pengukuran posisi menton terhadap MSR (Mid Sagital Reference). Penelitian ini menggunakan 8 sampel simetris dan 8 sampel asimetris yang diukur oleh peneliti utama dan dibandingkan dengan peneliti baku emas (uji inter-observer). Dilakukan pula uji intra-observer dimana peneliti utama melakukan pengukuran sebanyak dua kali untuk mendapatkan bukti reliabilitas pengukuran. Hasil : Uji kesesuaian Bland Altman menunjukan bahwa hasil pengukuran menunjukkan validitas dan reliabilitas yang baik (p>0,05) untuk semua pengukuran baik inter-observer dan intra-observer Kesimpulan : Hasil pengukuran dapat digunakan sebagai studi awal untuk penelitian lanjutan dengan menentukan reliabilitas titik-titik anatomis yang dibutuhkan dalam analisis kasus asimetri mandibulofasial. Cephalometric measurements objectively determine anatomical points but it can also involve measuring subjectivity with factors that can influence measurement results. In this case a test is needed to obtain good validity and reliability of measurements so that the analysis of the measurement results is considered accurate and feasible. The development of digital radiography supported by software makes it easier for operators to interpret quantitative and qualitative radiographic imaging results. Menton Point (Me) is an anatomical point that is often used as a reference for horizontal facial symmetry in the posteroanteriorcephalogram. To prove the validity of the measurement, a suitability test was conducted in asymmetry group, symmetry group, and combined group to determine the position of the menton to MSR (Mid Sagital Reference). This study used 8 symmetrical samples and 8 asymmetrical samples measured by the main researchers and compared with the gold standard researchers (inter-observer test). An intra-observer test was also conducted where the main researcher made measurements twice to obtain the reliability of the measurement. The Bland Altman suitability test was used and the measurement results showed both measurements inter-observer and intra-observer demontrated good validity and reliability (p> 0.05) The measurement results could be used as a preliminary study for further research by determining point reliability anatomical points needed in the analysis of mandibulofacial asymmetry.

scholarly journals Are the Assioma Favero Power Meter Pedals a Reliable Tool for Monitoring Cycling Power Output?

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2789
Author(s):  
Víctor Rodríguez-Rielves ◽  
José Ramón Lillo-Beviá ◽  
Ángel Buendía-Romero ◽  
Alejandro Martínez-Cava ◽  
Alejandro Hernández-Belmonte ◽  
...  
Keyword(s):  
Power Output ◽  
Gold Standard ◽  
Cycle Ergometer ◽  
Test Reliability ◽  
Direct Drive ◽  
Validity And Reliability ◽  
Power Meter ◽  
High Workload ◽  
Vibration Stress ◽  
40 Hz

This study aimed to examine the validity and reliability of the recently developed Assioma Favero pedals under laboratory cycling conditions. In total, 12 well-trained male cyclists and triathletes (VO2max = 65.7 ± 8.7 mL·kg−1·min−1) completed five cycling tests including graded exercises tests (GXT) at different cadences (70–100 revolutions per minute, rpm), workloads (100–650 Watts, W), pedaling positions (seated and standing), vibration stress (20–40 Hz), and an 8-s maximal sprint. Tests were completed using a calibrated direct drive indoor trainer for the standing, seated, and vibration GXTs, and a friction belt cycle ergometer for the high-workload step protocol. Power output (PO) and cadence were collected from three different brand, new pedal units against the gold-standard SRM crankset. The three units of the Assioma Favero exhibited very high within-test reliability and an extremely high agreement between 100 and 250 W, compared to the gold standard (Standard Error of Measurement, SEM from 2.3–6.4 W). Greater PO produced a significant underestimating trend (p < 0.05, Effect size, ES ≥ 0.22), with pedals showing systematically lower PO than SRM (1–3%) but producing low bias for all GXT tests and conditions (1.5–7.4 W). Furthermore, vibrations ≥ 30 Hz significantly increased the differences up to 4% (p < 0.05, ES ≥ 0.24), whereas peak and mean PO differed importantly between devices during the sprints (p < 0.03, ES ≥ 0.39). These results demonstrate that the Assioma Favero power meter pedals provide trustworthy PO readings from 100 to 650 W, in either seated or standing positions, with vibrations between 20 and 40 Hz at cadences of 70, 85, and 100 rpm, or even at a free chosen cadence.

scholarly journals Comparative evaluation of three image analysis methods for angular displacement measurement in a MEMS microgripper prototype: a preliminary study

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 119
Author(s):  
Federica Vurchio ◽  
Giorgia Fiori ◽  
Andrea Scorza ◽  
Salvatore Andrea Sciuto
Keyword(s):  
Image Analysis ◽  
Angular Displacement ◽  
Functional Characterization ◽  
Displacement Measurement ◽  
Mems Devices ◽  
Speeded Up Robust Features ◽  
Relevant Today ◽  
Measurement Results ◽  
Preliminary Study

<p class="Abstract"><span lang="EN-US">The functional characterization of MEMS devices is relevant today since it aims at verifying the behavior of these devices, as well as improving their design. In this regard, this study focused on the functional characterization of a MEMS microgripper prototype suitable in biomedical applications: the measurement of the angular displacement of the microgripper comb-drive is carried out by means of two novel automatic procedures, based on an image analysis method, SURF-based (Angular Displacement Measurement based on Speeded Up Robust Features, ADM<sub>SURF</sub>) and FFT-based (Angular Displacement Measurement based on Fast Fourier Transform, ADM<sub>FFT</sub>) method, respectively. Moreover, the measurement results are compared with a Semi-Automatic Method (SAM), to evaluate which of them is the most suitable for the functional characterization of the device. The curve fitting of the outcomes from SAM and ADM<sub>SURF</sub>, showed a quadratic trend in agreement with the analytical model. Moreover, the ADM<sub>SURF</sub> measurements below 1° are affected by an uncertainty of about 0.08° for voltages less than 14 V, confirming its suitability for microgripper characterization. It was also evaluated that the ADM<sub>FFT</sub> is more suitable for measurement of rotations greater than 1° (up to 30°), with a measurement uncertainty of 0.02°, at 95% of confidence level.</span></p>

scholarly journals Can We Rely on Flight Time to Measure Jumping Performance or Neuromuscular Fatigue-Overload in Professional Female Soccer Players?

2020 ◽  
Vol 10 (13) ◽  
pp. 4424
Author(s):  
Estrella Armada-Cortés ◽  
Javier Peláez Barrajón ◽  
José Antonio Benítez-Muñoz ◽  
Enrique Navarro ◽  
Alejandro F. San Juan
Keyword(s):  
Gold Standard ◽  
Vertical Jump ◽  
Intraclass Correlation ◽  
Smartphone Application ◽  
Flight Time ◽  
Neuromuscular Fatigue ◽  
Football Players ◽  
Validity And Reliability ◽  
Jumping Performance ◽  
Significant Difference

The main purpose of this study was to compare the validity of the take-off velocity method (TOV) measured with a force platform (FP) (gold standard) versus the flight time method (FT) in a vertical jump to measure jumping performance or neuromuscular fatigue-overload in professional female football players. For this purpose, we used a FP and a validated smartphone application (APP). A total of eight healthy professional female football players (aged 27.25 ± 6.48 years) participated in this study. All performed three valid trials of a countermovement jump and squat jump and were measured at the same time with the APP and the FP. The results show that there is a lack of validity and reliability between jump height (JH) calculated through the TOV method with the FP and the FT method with the FP (r = 0.028, p > 0.84, intraclass correlation coefficient (ICC) = −0.026) and between the JH measured with the FP through the TOV method and the APP with the FT method (r = 0.116, p > 0.43, ICC = −0.094 (−0.314–0.157)). A significant difference between the JH measured through the TOV with the FP versus the APP (p < 0.05), and a trend between the JH obtained with the FP through the TOV and the FT (p = 0.052) is also shown. Finally, the JH with the FP through the FT and the APP did not differ (p > 0.05). The eta-squared of the one-way ANOVA was η2 = 0.085. It seems that only the TOV measured with a FP could guarantee the accuracy of the jump test in SJ+CMJ and SJ, so it is recommended that high-level sportswomen and men should be assessed with the FP through TOV as gold standard technology to ensure correct performance and/or fatigue-overload control during the sport season.

scholarly journals Compensating Qualitative Rating Distortion of User Experience Evaluation Based on Prospect Theory

2019 ◽  
Vol 11 (23) ◽  
pp. 6815
Author(s):  
Min Chul Lee ◽  
Jaehyun Park
Keyword(s):  
Decision Making ◽  
Prospect Theory ◽  
Case Studies ◽  
User Experience ◽  
Cognitive Distortion ◽  
Model Fit ◽  
Online Questionnaire ◽  
Measurement Results ◽  
Preliminary Study ◽  
User Value

Psychophysical assessment may be affected by cognitive distortion. Although the theory was originally developed to revise decision making in uncertain situations, prospect theory can be applied to psychophysical measurements, which was verified in a previous preliminary study. Two case studies were used to validate the utilization of prospect theory in psychophysical measurements. Affective satisfaction dimensions were rated by participants for an experimental device using a 0–100 scale. Performance of affective satisfaction models increased with the application of prospect theory-based compensation. Hundreds of participants evaluated the user value of their own devices via an online questionnaire. Although model fit performance increased slightly with transformed data, more case studies are needed to investigate the utility of prospect theory on user value or on a range of target constructs. The application of prospect theory in various situations of psychophysical measurement can be expected to improve and compensate for measurement results.

Assessment of 3D-TOF-MRA at 3.0 tesla in the characterization of the angioarchitecture of cerebral arteriovenous malformations: a preliminary study

2007 ◽  
Vol 48 (6) ◽  
pp. 678-686 ◽  
Author(s):  
J. O. Heidenreich ◽  
A. M. Schilling ◽  
F. Unterharnscheidt ◽  
R. Stendel ◽  
S. Hartlieb ◽  
...  
Keyword(s):  
Image Quality ◽  
Gold Standard ◽  
Signal To Noise Ratio ◽  
Brain Arteriovenous Malformation ◽  
3.0 Tesla ◽  
Detection Rates ◽  
Tof Mra ◽  
Preliminary Study

Background: The characterization of brain arteriovenous malformation (AVM) angioarchitecture remains rewarding in planning and predicting therapy. The increased signal-to-noise ratio at higher field strength has been found advantageous in vascular brain pathologies. Purpose: To evaluate whether 3.0T time-of-flight (TOF) magnetic resonance angiography (MRA) is superior to 1.5T TOF-MRA for the characterization of cerebral AVMs. Material and Methods: Fifteen patients with AVM underwent TOF-MRA at 3.0T and 1.5T and catheter angiography (DSA), which was used as the gold standard. Blinded readers scored image quality on a four-point scale, nidus size, and number of feeding arteries and draining veins. Results: Image quality of TOF-MRA at 3.0T was superior to 1.5T but still inferior to DSA. Evaluation of nidus size was equally good at 3.0T and 1.5T for all AVMs. In small AVMs, however, there was a tendency of size overestimation at 3.0T. MRA at 3.0T had increased detection rates for feeding arteries (+21%) and superficial (+13%) and deep draining veins (+33%) over 1.5T MRA. Conclusion: 3.0T TOF-MRA offers superior characterization of AVM angioarchitecture compared with 1.5T TOF-MRA. The image quality of MRA at both 3.0 and 1.5T is still far from equal to DSA, which remains the gold standard for characterization of AVM.

Validity of The Fertility Quality of Life (FertiQol) Questionnaire in Indonesian Infertile Women

KnE Medicine ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 202
Author(s):  
Muhammad D. Priangga ◽  
Gita Pratama ◽  
Mila Maidarti ◽  
Achmad K. Harzif ◽  
Budi Wiweko
Keyword(s):  
Quality Of Life ◽  
Statistical Analysis ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Validity And Reliability ◽  
Cross Sectional ◽  
Infertile Women ◽  
The Mean ◽  
Preliminary Study

<p><strong>Introduction</strong></p><p>Infertility in Indonesia has an estimated prevalence as high as 22.3%, with the nature of the problem and its treatment could be devastating, it could affect quality of life and vice versa influence successful of the treatment. The Fertility Quality of Life (FertiQol) Questionnaire was specifically designed for infertility couples and has been demonstrated to have good properties. Studies in several countries has showed consistency in validity and reliability of the questionnaire. Precedently there has been no published study about Fertiqol in Indonesia, this preliminary study is to measure validity and reliability of FertiQol questionnaire among Indonesian infertility women.</p><p><br /> <strong>Material &amp; Methods</strong></p><p>This is a cross-sectional study, a written Fertiqol Questionnaire Indonesian version (www.Fertiqol.org) were distribute to Infertility clinic in Cipto Mangunkusumo General Hospital, total of 129 women completed the questionnaire. Statistical analysis used SPSS version 23.0. The questionnaire were tested for validity with Pearson’s correlation with two tailed and Cronbach α coefficient for reliability.<br /> <strong></strong></p><p><strong>Results</strong></p><p>FertiQol were completed by 129 women with infertility problem. The mean of total FertiQol score was 70.49±11.44, score for emotional, mind/body, relational, environment and tolerability was respectively 63.79±18.86; 66.05±18.22; 75.19.±15.11; 68.99±18.63; 75.64±16.55; 66.23±19.17. Reliability of Fertiqol was high (Cronbach a &gt; 0.70) with every item of questionnaires was valid ( r&gt; 0.1729).<br /> <strong></strong></p><p><strong>Conclusion</strong></p><p>This study showed that FertiQol Indonesian version are valid and reliable in measured quality of life among infertility women in Indonesia.</p>

Heterotopic Ossification of the Temporomandibular Joint in Juvenile Idiopathic Arthritis

2011 ◽  
Vol 38 (7) ◽  
pp. 1423-1428 ◽  
Author(s):  
SARAH RINGOLD ◽  
MAHESH THAPA ◽  
ELIZABETH A. SHAW ◽  
CAROL A. WALLACE
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Heterotopic Ossification ◽  
Temporomandibular Joint ◽  
Joint Destruction ◽  
Imaging Study ◽  
Synovial Biopsy ◽  
Radiographic Imaging ◽  
Pannus Formation ◽  
Heterotopic Ossifications ◽  
Imaging Results

Objective.To describe the clinical, laboratory, pathologic, and radiographic imaging characteristics of a series of children with juvenile idiopathic arthritis (JIA) and radiographic imaging evidence of heterotopic ossification of their temporomandibular joint (TMJ).Methods.Children were identified through search of an administrative database of imaging results at Seattle Children’s Hospital. Retrospective chart review was performed to collect data on each patient’s clinical and laboratory characteristics, systemic therapies, timing and number of TMJ intraarticular corticosteroid injections (IAS), TMJ symptoms, and TMJ findings on physician examination. TMJ imaging studies for which heterotopic ossifications were reported were reviewed. Pathology specimens were reviewed for the 2 children who underwent synovial biopsy of their TMJ.Results.Twelve children were identified. The average duration between onset of JIA and detection of heterotopic ossification of TMJ on an imaging study was 36 months (range 19–94). Half the children had abnormal mouth-opening for age when the calcifications were first detected. In each case, the heterotopic ossification was first detected by computed tomography scan, and in 11 of the cases they were associated with synovial pannus formation as documented on an imaging study. Two children underwent synovial biopsy, which revealed reactive parosteal osteochondromatosis in one case and findings consistent with an intraarticular rheumatoid nodule in the other.Conclusion.Heterotopic ossifications of the TMJ may be seen in children with JIA and are associated with particularly severe TMJ arthritis, joint destruction, and pannus formation. Pathology from these joints suggests that the heterotopic ossification may result from multiple pathological processes.

Sign in / Sign up

Export Citation Format

Share Document