Evaluation of Eight Methods for Aligning Orientation of Two Coordinate Systems

2016 ◽  
Vol 138 (8) ◽  
Author(s):  
Hakim Mecheri ◽  
Xavier Robert-Lachaine ◽  
Christian Larue ◽  
André Plamondon
Keyword(s):  
Repeated Measures ◽  
The Other ◽  
Average Error ◽  
Alignment Error ◽  
Coordinate Systems ◽  
Repeated Measures Analysis ◽  
Angular Velocities ◽  
The Mean ◽  
Marker Cluster ◽  
Post Hoc

The aim of this study was to evaluate eight methods for aligning the orientation of two different local coordinate systems. Alignment is very important when combining two different systems of motion analysis. Two of the methods were developed specifically for biomechanical studies, and because there have been at least three decades of algorithm development in robotics, it was decided to include six methods from this field. To compare these methods, an Xsens sensor and two Optotrak clusters were attached to a Plexiglas plate. The first optical marker cluster was fixed on the sensor and 20 trials were recorded. The error of alignment was calculated for each trial, and the mean, the standard deviation, and the maximum values of this error over all trials were reported. One-way repeated measures analysis of variance revealed that the alignment error differed significantly across the eight methods. Post-hoc tests showed that the alignment error from the methods based on angular velocities was significantly lower than for the other methods. The method using angular velocities performed the best, with an average error of 0.17 ± 0.08 deg. We therefore recommend this method, which is easy to perform and provides accurate alignment.

Influence of Altered Auditory Feedback on Oral–Nasal Balance in Speakers of Brazilian Portuguese

2019 ◽  
Vol 62 (10) ◽  
pp. 3752-3762
Author(s):  
Gillian de Boer ◽  
Viviane Marino ◽  
Larissa Berti ◽  
Eliana Fabron ◽  
Evelyn Alves Spazzapan ◽  
...  
Keyword(s):  
Auditory Feedback ◽  
Repeated Measures ◽  
Brazilian Portuguese ◽  
Feedback Condition ◽  
Compensatory Response ◽  
Repeated Measures Analysis ◽  
The Mean ◽  
Vowel Nasalization ◽  
Post Hoc

Purpose This study explored the role of auditory feedback in the regulation of oral–nasal balance in speakers of Brazilian Portuguese. Method Twenty typical speakers of Brazilian Portuguese (10 male, 10 female) wore a Nasometer headset and headphones while continuously repeating stimuli with oral and nasal sounds. Oral–nasal balance was quantified with nasalance scores. The signals from 2 additional oral and nasal microphones were played back to the participants through the headphones. The relative loudness of the nasal channel in the mix was gradually changed, so that the speakers heard themselves as more or less nasal. Results A repeated-measures analysis of variance of the mean nasalance scores of the stimuli at baseline, minimum, and maximum nasal feedback conditions demonstrated significant effects of nasal feedback condition ( p < .0001) and stimuli ( p < .0001). Post hoc analyses demonstrated that the mean nasalance scores were lowest for the maximum nasal feedback condition. The scores of the minimum nasal feedback condition were significantly higher than 2 of 3 baseline feedback conditions. The speaking amplitude of the participants did not change between the nasal feedback conditions. Conclusions Increased nasal signal level feedback led to a compensatory adjustment in the opposite direction, confirming that oral–nasal balance is regulated by auditory feedback. However, reduced nasal signal level feedback resulted in a compensatory response that was lower in magnitude. This suggests that, even in Brazilian Portuguese, a language with phonetic and phonological vowel nasalization, decreased nasality was not perceived as critically as increased nasality by the speakers.

Influence of Altered Auditory Feedback on Oral–Nasal Balance in Speech

2017 ◽  
Vol 60 (11) ◽  
pp. 3135-3143 ◽  
Author(s):  
Gillian de Boer ◽  
Tim Bressmann
Keyword(s):  
Auditory Feedback ◽  
Repeated Measures ◽  
Feedback Condition ◽  
Control Group ◽  
Compensatory Response ◽  
Amplitude Control ◽  
Stimulus Sentence ◽  
Repeated Measures Analysis ◽  
The Mean ◽  
Post Hoc

Purpose This study explored the role of auditory feedback in the regulation of oral–nasal balance in speech. Method Twenty typical female speakers wore a Nasometer 6450 (KayPentax) headset and headphones while continuously repeating a sentence with oral and nasal sounds. Oral–nasal balance was quantified with nasalance scores. The signals from 2 additional oral and nasal microphones were played back to the participants through the headphones. The relative loudness of the nasal channel in the mix was gradually changed so that the speakers heard themselves as more or less nasal. An additional amplitude control group of 9 female speakers completed the same task while hearing themselves louder or softer in the headphones. Results A repeated-measures analysis of variance of the mean nasalance scores of the stimulus sentence at baseline, minimum, and maximum nasal feedback conditions demonstrated a significant effect of the nasal feedback condition. Post hoc analyses found that the mean nasalance scores were lowest for the maximum nasal feedback condition. The scores of the minimum nasal feedback condition were significantly higher than 2 of the 3 baseline feedback conditions. The amplitude control group did not show any effects of volume changes on nasalance scores. Conclusions Increased nasal feedback led to a compensatory adjustment in the opposite direction, confirming that oral–nasal balance is regulated by auditory feedback. However, a lack of nasal feedback did not lead to a consistent compensatory response of similar magnitude.

scholarly journals Effect of Orthodontic Brackets on the Accuracy of Apex Locators: A Pilot Study

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Özgür Genç Şen ◽  
Özgür İlke Ulusoy ◽  
Yelda Nayır Paltun ◽  
Çağrı Ulusoy
Keyword(s):  
Repeated Measures ◽  
Orthodontic Brackets ◽  
Mandibular Incisor ◽  
Test Conditions ◽  
Repeated Measures Analysis ◽  
Working Length ◽  
The Mean ◽  
Mean Differences ◽  
Post Hoc ◽  
Electronic Apex Locator

The purpose of this study was to evaluate the effect of metal orthodontic brackets on the accuracy of electronic apex locator (EAL). The actual canal lengths (ACL) of 40 mandibular incisor teeth were determined. Then, the teeth were randomly divided into two groups ( n = 20 ). Orthodontic metal brackets were applied in the first group, and no brackets, in the second group. The working length of each tooth was measured with an EAL under 3 test conditions according to the distance between the lip clip and sample tooth. Data were analyzed using one-way repeated measures analysis of variance and Tukey’s post hoc tests ( p = 0.05 ). In the bracketed samples, when the lip clip was located at 1 cm and 2 cm from the samples. The mean differences between the EAL measurements and ACLs were statistically higher than those when the samples were located 3 cm from the lip clip ( p < 0.05 ). There were also statistically significant differences between EAL measurements and ACLs in the bracketed samples located 1 and 2 cm from the lip clip ( p < 0.05 ). In the nonbracketed group, the differences between EAL measurements and ACLs were not statistically significant in the samples located 1, 2, and 3 cm from the lip clip ( p > 0.05 ). Use of orthodontic metal brackets can negatively influence the accuracy of the electronic apex locator when the distance between the lip clip and bracket was short. A minimum of 3 cm distance should be kept between the lip clip and tooth in order to make consistent electronic measurements.

Efektivitas Comprehensive Breastfeeding Education terhadap Keberhasilan Pemberian Air Susu Ibu Postpartum

1970 ◽  
Vol 1 (2) ◽  
Author(s):  
Irma Nurbaeti ◽  
Kustati Budi Lestari
Keyword(s):  
Repeated Measures ◽  
Breastfeeding Support ◽  
Breastfeeding Practices ◽  
Breastfeeding Education ◽  
Repeated Measures Analysis ◽  
Post Test ◽  
Quasi Experimental ◽  
The Mean ◽  
Convenience Sampling ◽  
Postpartum Mothers

Pemberian Air Susu Ibu (ASI) masih merupakan masalah bagi pemenuhan kebutuhan nutrisi bayi baru lahir. Dukungan agar ibu menyusui bayi merupakan hal penting dalam menginisiasi dan mempertahankan pemberian ASI. Strategi dibutuhkan untuk mendukung keberhasilan menyusui. Tujuan penelitian adalah menganalisis efektivitas comprehensive breastfeeding education terhadap keberhasilan pemberian (ASI) pada periode postpartum. Jenis penelitian ini menggunakan kuasi eksperimen one group pre post test repeated measured design. Jumlah sampel sebanyak 22 ibu dengan menggunakan teknik accidental sampling. Pengumpulan data dilaksanakan pada bulan September–Oktober 2013 di Puskesmas wilayah Kota Tangerang Selatan. Intervensi dilakukan selama 30 menit. Pengumpulan data dilakukan sebelum intervensi, 3 hari setelah intervensi (post1), dan 10 hari setelah intervensi (post 2). Pengumpulan data menggunakan kuesioner dan observasi. Keberhasilan pemberian ASI berdasar pada parameter pengetahuan, langkah menyusui, perlekatan bayi, dan kecukupan ASI. Analisis data menggunakan general linear model repeated measureANOVA. Hasil penelitian menunjukkan adanya signifikansi comprehensive breastfeeding education (p=0.001). Rata-rata keberhasilan pemberian ASI sebelum dan setelah intervensi meningkat. Sebesar 93,9% intervensi memengaruhi tingkat keberhasilan. Rata-rata sebelum intervensi 56,74 (SD 5,92), post 1 sebesar 60,83 (SD 6,38) dan post2 sebesar 74,55 (SD 5,32). Subvariabel yang memiliki efek secara signifikan setelah intervensi adalah pengetahuan (p=0.001) dan langkah menyusui (p=0.001), sedangkan subvariabel perlekatan bayi (p=0.061) dan kecukupan ASI (p=0.162) tidak secara signifikan berbeda antara sebelum dan setelah intervensi. Pelaksanaanbreastfeeding education disarankan pada ibu agar dapat melakukan posisi perlekatan bayi yang benar sehingga dapat mengurangi masalah-masalah berkaitan dengan perlekatan yang tidak sesuai seperti puting perih, lecet atau berdarah, dan bayi kurang puas dalam menyusu yang bisa mengakibatkan gagalnya program ASI ekslusif.Kata kunci:Menyusui, pendidikan, perlekatan, postpartum AbstractBreastfeeding have still been problem for adequate newborn nutrition. Adequate breastfeeding support is essential for mothers to initiate and maintain optimal breastfeeding practices. A strategic needed to support successful breastfeeding. The purpose of research is to analyze the effectiveness comprehensive breastfeeding education on successful breastfeeding at postpartum periods. A quasi-experimental one group pretest, post test, repeated mesaured was used. This study was conducted at public health in Tangerang Selatan municipality in September–October 2013 among 22 postpartum mothers, convenience sampling methods. Intervention was done 30 minute. Data were collected before intervention (pretest), third day after intervention (post 1) and tenth day after intervention (repeated/post 2) using four parameter, that are knowledge, breastfeeding steps, proper lacth-on and adequate breastmilk. Using repeated measures analysis of variance there was a significant increase (p=0.001) in the overall Successful breastfeeding mean. Around 93,9% the effectiveness of intervention influence on successful. The mean before intervention is 56,74 (SD 5,92), increased at post 1:60,83 (SD 6,38) and post 2:74,55 (SD 5,32). Subvariable which has effect significantly after intervention is knowledge (p=0.001) and breastfeeding steps (p=0.001), in contrary, proper latch-on (p=0,061) and adequate breastmilk (p=0.162) have no significant effect after intervention. Suggestion to support breastfeeding education and counselling proper latch-on adequately that can decrease the problem such as painful, creaks or bloody putting.Key words: Breastfeeding, education, latch-on, postpartum

scholarly journals Effect of Educational Workshops on Disaster Risk Perception in Nurses

2020 ◽  
pp. 270-278
Keyword(s):  
Risk Perception ◽  
Repeated Measures ◽  
Intervention Group ◽  
Round Table ◽  
Disaster Risk ◽  
National Standards ◽  
Control Group ◽  
Repeated Measures Analysis ◽  
Post Hoc ◽  
And Control

INTRODUCTION: The enhancement of nurses’ risk perception plays a significant role in their preparedness during disasters and emergencies. Therefore, this study aimed to investigate the effect of educational workshops on disaster risk perception in nurses METHODS: This randomized controlled field trial study included 62 nurses working at Razi Hospital, Birjand, Iran. The participants were divided into intervention and control groups. The intervention group was then requested to participate in a one-day intensive educational workshop based on the current national standards. The workshop content included a combination of lecturing methods, round-table exercises, and film display. The data were collected using the demographic characteristic form and researcher-made questionnaires measuring the nurses’ risk perception during disasters and emergencies. Subsequently, the data were analyzed using independent t-test, repeated measures analysis, and Bonferroni post hoc tests. FINDINGS: The mean total score of risk perception were significantly higher in the intervention group before, immediately, and two months after the workshop session, compared to those in the control group (P˂0.001). CONCLUSION: The implementation of nurses’ national preparation program during disasters and emergencies can result in an increase in the nurses’ risk perception during these events. Therefore, regarding the importance of nurses’ preparedness in confrontation with disasters and emergencies, it seems necessary to integrate the National Preparedness Program into the educational programs immediately after recruitment and in the form of in-service courses.

Effect of an early mobilisation programme on pain intensity after laparoscopic surgery: a randomised clinical trial

2020 ◽  
pp. bmjspcare-2020-002618
Author(s):  
Azam Dehghani ◽  
Ali Hajibagheri ◽  
Ismail Azizi-Fini ◽  
Fatemeh Atoof ◽  
Noushin Mousavi
Keyword(s):  
Clinical Trial ◽  
Laparoscopic Surgery ◽  
Pain Intensity ◽  
Repeated Measures ◽  
Intervention Group ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Early Mobilisation ◽  
Repeated Measures Analysis ◽  
The Mean

BackgroundPain is a common complication after laparoscopic surgery. This study aimed to examine the effect of an early mobilisation programme on postoperative pain intensity after laparoscopic surgery.MethodsA randomised controlled clinical trial was conducted on 80 patients who underwent laparoscopic surgery in Shahid Beheshti Hospital in Kashan, Iran. The patients were randomly allocated to intervention (n=40) and a control (n=40) group. In the intervention group, an early mobilisation programme was implemented in two rounds. The patient’s perceived pain was assessed using a Visual Analogue Scale 15 min before and 30 min after each round of early mobilisation. Data were analysed through the independent samples t, χ2 and Fisher’s exact tests and the repeated measures analysis.ResultsThe repeated measures analysis showed that the mean pain scores have been decreased over time (F=98.88, p<0.001). Considering the observed interaction between time and the intervention, the t test was used for pairwise comparisons and showed that the mean pain score was not significantly different between the two groups in 15 min before the first round of early mobilisation (p=0.95). However, the mean pain in the intervention group was significantly less than the control group in all subsequent measurements (p<0.05).ConclusionEarly mobilisation programmes such as the one implemented in the current study are easy and inexpensive and can be implemented safely for the reduction of pain after laparoscopic surgeries.

scholarly journals The influence of different screw tightening forces on the vertical misfit of implant-supported frameworks

2005 ◽  
Vol 13 (2) ◽  
pp. 120-125 ◽  
Author(s):  
Diego Klee de Vasconcellos ◽  
Marco Antonio Bottino ◽  
Renato Sussumu Nishioka ◽  
Luiz Felipe Valandro ◽  
Elza Maria Valadares da Costa
Keyword(s):  
Repeated Measures ◽  
In Vitro Study ◽  
Pairwise Comparisons ◽  
Tukey Test ◽  
Nickel Chromium ◽  
Marginal Discrepancy ◽  
The Mean ◽  
Post Hoc ◽  
One Way Anova

OBJECTIVES: The present in vitro study was designed to compare the differences in the vertical misfit of implant-supported frameworks using three different forces for tightening the bridge locking screws: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. METHODS: The investigation was conducted based on the results given by 9 six-unit nickel-chromium (2 abutments/ 4 pontics) screw-retained implant-supported frameworks. The structures were exposed to simulated porcelain firings. The marginal misfit measurements were made using a traveling measuring microscope at selected screw tightening forces: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. The results were submitted to one-way ANOVA with repeated measures on one factor, and post hoc pairwise comparisons using Tukey test (5%). RESULTS: The mean marginal misfit of the frameworks, fastening the screws by hand until first resistance, was 41.56µm (SD±12.45µm). The use of torque driver devices caused a significant reduction in marginal opening (p<0.05). With the lowest torque available (10Ncm), the mean marginal discrepancy at the abutment-framework interface was reduced an average of 52% to a mean marginal opening of 19.71µm (SD±2.97µm). After the use of the 20Ncm torque driver, the mean marginal discrepancy of the frameworks was reduced an average of 69% to a mean marginal opening of 12.82µm (SD±4.0µm). Comparing the use of torque drivers with 10 and 20 Ncm torque, the means are not significantly different from one another. CONCLUSION: The seating force has an important effect on the vertical misfit measurements, once it may considerably narrow the vertical misfit gaps at the abutment-framework interface, thus leading to a misjudgment of the real marginal situation.

Effects of Breathy Voice Source on Ratings of Hypernasality

2005 ◽  
Vol 42 (6) ◽  
pp. 641-648 ◽  
Author(s):  
Setsuko Imatomi
Keyword(s):  
Cleft Palate ◽  
Repeated Measures ◽  
Voice Disorder ◽  
Academic Training ◽  
Clinical Experiences ◽  
Point Scale ◽  
Voice Source ◽  
Cleft Palate Speech ◽  
Repeated Measures Analysis ◽  
Post Hoc

Objective To investigate the effects of breathy voice sources on ratings of hypernasality using synthesized speech. Methods Speech samples were obtained from children with cleft palates who demonstrated varying degrees of hypernasality and from a child with a voice disorder. Sources with 6 degrees of breathiness were created: a breathy source and five synthesized sources with lowered harmonics-to-noise ratio (HNR) values by the addition of impulses. These sources and each original (clear) source were combined with three kinds of filters: mild, moderate, and severely hypernasal. Consequently, 21 ([6 + 1] × 3) stimuli for each vowel (/a/ and /i/) were obtained for ratings. Participants Thirteen speech pathologists with academic training and various clinical experiences with cleft palate speech rated hypernasality of the stimuli on a 5-point scale. Main Outcome Measures Ratings of hypernasality for breathy and clear stimuli were analyzed using a repeated measures analysis of variance. Results The effects of breathy source on ratings of hypernasality were significant for the following filters: mild hypernasal /a/, severe hypernasal /a/, mild hypernasal /i/, and moderate hypernasal /i/. A post-hoc comparison test demonstrated that the more breathy sources (BH0 or BH2) generally increased the hypernasality score for mild hypernasal filters and decreased it for moderate and severe hypernasal filters. The less breathy sources (BH3, BH4, and BH5) hardly affected the ratings. Conclusion The effects of breathiness on ratings of hypernasality seem to moderate rather than to mask perceived hypernasality. That is, breathiness raises slight hypernasality, whereas it reduces severe hypernasality.

scholarly journals The Effect of Clinical Pilates on Functional Movement in Recreational Runners

2017 ◽  
Vol 38 (10) ◽  
pp. 776-780 ◽  
Author(s):  
Anna Laws ◽  
Sean Williams ◽  
Cassie Wilson
Keyword(s):  
Repeated Measures ◽  
Functional Movement Screen ◽  
Contributing Factors ◽  
Post Intervention ◽  
Functional Movement ◽  
Repeated Measures Analysis ◽  
Significant Difference ◽  
Movement Ability ◽  
Recreational Runners ◽  
Post Hoc

AbstractBiomechanical imbalances and inefficient functional movements are considered contributing factors to running-related injuries. Clinical Pilates uses a series of exercises focused on retraining normal movement patterns. This study investigated whether a 6-week course of Clinical Pilates improves functional movement and thereby, potentially, reduces the risk of running-related injuries associated with movement dysfunction. A modified functional movement screen was used to analyze the functional movement ability of forty runners. Forty participants completed a 6-week course of Clinical Pilates delivered by a Clinical Pilates instructor. The movement screen was carried out 3 times for each runner: 6 weeks pre-intervention (baseline), within one week pre-intervention (pre) and within one week post-intervention (post). Repeated-measures analysis of variance and post-hoc tests found significant increases in scores between baseline and post (mean±SD; 13.4±2.4 vs. 17.0±1.7, p<0.01) and pre and post (mean±SD; 13.5±2.5 vs. 17.0±1.7, p<0.01), but no significant difference between baseline and pre (p=0.3). A 6-week course of Clinical Pilates significantly improves functional movement in recreational runners, and this may lead to a reduction in the risk of running-related injuries.

Sight-Singing Scores of High School Choristers with Extensive Training in Movable Solfège Syllables and Curwen Hand Signs

2008 ◽  
Vol 56 (3) ◽  
pp. 255-266 ◽  
Author(s):  
Alan C. McClung
Keyword(s):  
High School ◽  
Knowledge Base ◽  
Repeated Measures ◽  
The Other ◽  
Sight Singing ◽  
Repeated Measures Anova ◽  
Pedagogical Strategy ◽  
Extensive Training ◽  
Significant Difference ◽  
The Mean

Randomly chosen high school choristers with extensive training in solfège syllables and Curwen hand signs ( N = 38) are asked to sight-sing two melodies, one while using Curwen hand signs and the other without. Out of a perfect score of 16, the mean score with hand signs was 10.37 ( SD = 4.23), and without hand signs, 10.84 ( SD = 3.96). A repeated-measures ANOVA revealed no statistically significant difference, F(1, 37) = .573, p = .454. These findings support the results of five earlier studies; however, because earlier studies were limited to students who were minimally trained in movable solfège syllables and Curwen hand signs, this study expands the knowledge base. Relationships between performance scores and instrumental experience, class grade, sight-singing experience, and hand sign experience were also examined. A pedagogical strategy for linking Curwen hand signs with students' preferred modes of learning (especially the kinesthetic mode) is recommended.

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