scholarly journals Postural stability measurement using tablet PC

2021 ◽  
Vol 80 (2) ◽  
pp. 95-103
Author(s):  
Tatsuhisa Hasegawa ◽  
Masakatsu Taki
Keyword(s):  
Postural Stability ◽  
Tablet Pc ◽  
Stability Measurement

scholarly journals Gait Stability Measurement by Using Average Entropy

Entropy ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 412
Author(s):  
Han-Ping Huang ◽  
Chang Francis Hsu ◽  
Yi-Chih Mao ◽  
Long Hsu ◽  
Sien Chi
Keyword(s):  
Postural Stability ◽  
Multiscale Entropy ◽  
Gait Stability ◽  
Eyes Closed ◽  
Stride Interval ◽  
Step Interval ◽  
Stability Measurement ◽  
Eyes Open ◽  
Two Measures ◽  
Better Than

Gait stability has been measured by using many entropy-based methods. However, the relation between the entropy values and gait stability is worth further investigation. A research reported that average entropy (AE), a measure of disorder, could measure the static standing postural stability better than multiscale entropy and entropy of entropy (EoE), two measures of complexity. This study tested the validity of AE in gait stability measurement from the viewpoint of the disorder. For comparison, another five disorders, the EoE, and two traditional metrics methods were, respectively, used to measure the degrees of disorder and complexity of 10 step interval (SPI) and 79 stride interval (SI) time series, individually. As a result, every one of the 10 participants exhibited a relatively high AE value of the SPI when walking with eyes closed and a relatively low AE value when walking with eyes open. Most of the AE values of the SI of the 53 diseased subjects were greater than those of the 26 healthy subjects. A maximal overall accuracy of AE in differentiating the healthy from the diseased was 91.1%. Similar features also exists on those 5 disorder measurements but do not exist on the EoE values. Nevertheless, the EoE versus AE plot of the SI also exhibits an inverted U relation, consistent with the hypothesis for physiologic signals.

scholarly journals Effects of sound level on postural stabilitySes seviyesinin denge performansına etkisi

2017 ◽  
Vol 14 (1) ◽  
pp. 217
Author(s):  
Serkan Hazar
Keyword(s):  
New York ◽  
Postural Stability ◽  
Sound Level ◽  
Noisy Environment ◽  
Balance Performance ◽  
Significance Level ◽  
Balance System ◽  
Significant Difference ◽  
Stability Measurement ◽  
High Level

The aim of this study is to investigate whether the intended ambient sound level has an effect on the postural stability. For this purpose 15 man and 12 women totally 27 healthy, voluntary students voluntarily participated in the study. The DT-8820 Multi-Function Environment Meter was used for Sound Level Measurement. Quiet environment, while the volume was maintained at between 15-30 decibel noise level of 90-100 dB in noisy environments. The Biodex balance system (Biodex, Inc., Shirley, New York) was used for postural stability measurement. SPSS 21.0 package program was used in the analysis of the data. The Wilcoxon Signed Ranks and Mann Whitney U test was used to compare measurement Significance level was set at 0.05 and 0.01 levels. When the balance performances at different sound levels are compared by gender, It was found that there was a significantly meaningful result in favor of men in quite environment oscillation balance scores both open eye and closed eye. However there was no significant difference among man and women other scores. On the other hand it was determined significant differences in the women closed eye oscillation score. In the man excepting open eye oscillation score the noisy environment was negatively affected all parameter. Postural stability was negatively affected noisy environment. As a result; In the study conducted that the high level of sound impaired the balance performance by affecting the vestibular system in both women and men and the effect was higher when closed eyes. ÖzetYapılan çalışmanın amacı ortam ses seviyesinin denge performansına etkisinin olup olmadığının araştırılmasıdır. Bu amaçla çalışmaya 15’i erkek, 12’si bayan toplam 27 öğrenci alınmıştır. Ortam Ses Seviyesi Ölçümü DT-8820 Multi-Function Environment Meter cihazı ile yapıldı. Sessiz ortam ses seviyesi 15-30 desibel arasında iken gürültülü ortam ses seviyesi 90-100 desibel arasında tutulmuştur.Denge ölçümü için BİODEX denge sistemi (Biodex, Inc, Shirley New York) kullanılmıştır.Verilerin analizinde SPSS 21.0 paket programı kullanıldı.  Verilerinin kıyaslanmasında Wilcoxon Signed Ranks Test ve Mann Whitney U test kullanıldı. Anlamlılık düzeyi 0.05 ve 0.01 seviyesinde kurgulandı. Sessiz ortam salınım değerlerinde hem gözler açıkken hem de gözler kapalıyken ölçülen değerlerde erkekler lehine anlamlı bir sonuç olduğu tespit edilirken diğer değerlerde cinsiyetler arası farklılık olmadığı tespit edilmiştir. Diğer taraftan kadınlarda ortam ses seviyesinin gözler kapalı iken ölçülen salınım denge değerlerinde anlamlı farklılık olduğu, gürültünün denge performansını olumsuz etkilediği, erkeklerde ise gözler açık salınım denge değeri hariç hem statik hem dinamik hemde gözler kapalı salınım denge değerlerinde anlamlı farklılık olduğu,  dengenin gürültüden olumsuz etkilendiği tespit edilmiştir. Sonuç olarak; yapılan çalışmada yüksek ses seviyesinin hem bayanlarda hem de erkeklerde vestibüler sistemi etkileyerek denge performansını bozduğu, bu etkinin gözler kapalıyken daha yüksek olduğu tespit edilmiştir. 

scholarly journals Prevalence of floating toe and its relationship with static postural stability in children: The Yamanashi adjunct study of the Japan Environment and Children’s Study (JECS-Y)

2021 ◽  
Author(s):  
Taro Fujimaki ◽  
Masanori Wako ◽  
Kensuke Koyama ◽  
Naoto Furuya ◽  
Ryoji Shinohara ◽  
...  
Keyword(s):  
Postural Stability ◽  
Center Of Pressure ◽  
The Body ◽  
Ground Contact ◽  
Foot Pressure ◽  
Eyes Closed ◽  
Stability Measurement ◽  
Eyes Open ◽  
The Relationship ◽  
Very High

AbstractFloating toe (FT) is a frequently seen condition in which a toe is inadequately in contact with the ground. Although toes play an important role in stabilizing standing posture and walking, many aspects of the effects of FT on the body remain unclear. To our knowledge, there have been no reports about the relationship between FT and postural stability, especially in children. This study aimed to clarify the prevalence of FT and its relationship with static postural stability in children. Of the 400 children aged 8 years who participated in our cohort study, 396, who were examined for static postural stability, were included in this study. Postural stability and FT were assessed using a foot pressure plate. The sway path length of the center of pressure and the area of the ellipse defined as the size of the area marked by the center of pressure were measured as an evaluation of static postural stability. We calculated the “floating toe score (FT score: small FT score indicates insufficient ground contact of the toes)” using the image of the plantar footprint obtained at the postural stability measurement. The FT rate was very high at more than 90%, and the FT score in the eyes-closed condition was significantly higher than that in the eyes-open condition in both sexes. The FT score significantly correlated with the center of pressure path and area. Our results suggest that ground contact of the toes is not directly related to static postural stability in children, but it may function to stabilize the body when the condition becomes unstable, such as when the eyes are closed.

scholarly journals Prevalence of floating toe and its relationship with static postural stability in children: The Yamanashi adjunct study of the Japan Environment and Children’s Study (JECS-Y)

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0246010
Author(s):  
Taro Fujimaki ◽  
Masanori Wako ◽  
Kensuke Koyama ◽  
Naoto Furuya ◽  
Ryoji Shinohara ◽  
...  
Keyword(s):  
Postural Stability ◽  
Center Of Pressure ◽  
The Body ◽  
Ground Contact ◽  
Standing Posture ◽  
Foot Pressure ◽  
Eyes Closed ◽  
Stability Measurement ◽  
Eyes Open ◽  
The Relationship

Floating toe (FT) is a frequently seen condition in which a toe is inadequately in contact with the ground. Although toes play an important role in stabilizing standing posture and walking, many aspects of the effects of FT on the body remain unclear. To our knowledge, there have been no reports about the relationship between FT and postural stability, especially in children. This study aimed to clarify the prevalence of FT and its relationship with static postural stability in children. Of the 400 children aged 8 years who participated in our cohort study, 396, who were examined for static postural stability, were included in this study. Postural stability and FT were assessed using a foot pressure plate. The sway path length of the center of pressure and the area of the ellipse defined as the size of the area marked by the center of pressure, were measured as an evaluation of static postural stability. We calculated the “floating toe score (FT score: small FT score indicates insufficient ground contact of the toes)” using the image of the plantar footprint obtained at the postural stability measurement. The rate of FT was elevated at more than 90%, and the FT score in the eyes-closed condition was significantly higher than that in the eyes-open condition in both sexes. The FT score significantly correlated with the center of pressure path and area. Our results suggest that ground contact of the toes is not directly related to static postural stability in children, but it may function to stabilize the body when the condition becomes unstable, such as when the eyes are closed.

Limitations of postural stability ratings

2007 ◽  
Author(s):  
Angela DiDomenico ◽  
Krystyna Gielo-Perczak ◽  
Raymond W. McGorry ◽  
Chien-Chi Chang
Keyword(s):  
Postural Stability

Functional surfaces produced by foam coating

TAPPI Journal ◽  
2016 ◽  
Vol 15 (8) ◽  
pp. 515-521 ◽  
Author(s):  
EIJA KENTTÄ ◽  
HANNA KOSKELA ◽  
SARA PAUNONEN ◽  
KARITA KINNUNEN-RAUDASKOSKI ◽  
TUOMO HJELT
Keyword(s):  
Life Time ◽  
Silica Coating ◽  
Foaming Properties ◽  
Coated Paper ◽  
Paper Properties ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Size Stability ◽  
Stability Measurement ◽  
Standard Paper

This paper reports experiments on silica coating formulations that are suitable for application as a thin pigment layer with foam coating technique on a paper web. To understand the foaming properties of nanosilica dispersions, the critical micelle concentration, foam half-life time, and foam bubble size stability were determined with three different foaming agents. The results indicate that the bubble stability measurement is a useful characterization method for foam coating purposes. Pilot foam coating trials were done and the effects of the chosen foaming agents were studied on the properties of the nanosilica-coated paper. The surface hydrophilicity of silica coated paper was related not only to silica pigment, but also to the chemical nature of the foaming agent. Standard paper properties were not affected by the thin silica coating.

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