Objective
The aim of study was to analyze the association between Quadriceps Angle (QA) and plantar pressure, navicular height (NH), and calcaneo-tibial angle (CTA).
Methods
A total of 64 volunteers (mean age: 22.25 ± 2.54 (range:19–33)) participated in this cross sectional study. EMED-m (Novel GmbH, Germany) electronic pedobarograph was employed for dynamic plantar pressure measurement using two step protocol. The angle between the vertical axis of calcaneus and the long axis of Achilles tendon for CTA. The height of navicular tubercle from the ground was measured while the subject was standing on both feet for NH. QA was measured while the subject was standing in a relaxed posture where both feet bearing equal weight.
Results
There were significant negative correlations between QA and maximum force (MxF) under the 4th. metatarsal head (MH4). The QA was also significantly correlated with MxF and force-time integral (FTI) under the bigtoe (BT). FTI under the 3rd. metatarsal head (MH3), MH4 and 5th. metatarsal head (MH5) were significantly negatively correlated with QA. Pressure-time integral (PTI) under the MH4 and MH5 were found to be significantly negatively correlated with QA. A significant correlation was also found between QA and NH (p < 0.0001), whilst there was no correlation between QA and CTA. Regression analysis showed that NH was appeared as the major contributor for the QA (β = −0.49, p < 0.001) in the dynamic condition, followed by BT-FTI (β = 0.37, p < 0.001) and MH5-MxF (β = −0.21, p < 0.037).
Conclusion
These findings may imply that the NH which can at least be controlled by appropriate shoe inserts may affect QA. This way, loading pattern of both plantar region and whole lower extremity may be altered.
Level of evidence
Level III, Diagnostic Study.
h i g h l i g h t s " Mixing polymers into bitumen has important consequences on the engineering properties. " Structural changes may be observed during processing of polymer-modified bitumens. " Complex modulus determination of PMBs is important to select the performance grade. " With the increase of experimental factors experimental trials increases exponentially. " Complex modulus predicted accurately with the developed ANN model.
Kaçış rampaları; otoyollarda seyahat eden araçlarda mekanik sebeplerden dolayı oluşan arızalarda, aracın kendisinin daha fazla zarar görmemesi ve çevresine zarar vermemesi için yoldan uzaklaşmasını ve güvenli bir şekilde durmasını sağlayan yapılardır. Ülkemizde ilk defa 2012 yılında Tarsus-Pozantı karayolunda iki gidiş ve iki dönüş olmak üzere toplam dört adet kaçış rampası yapılmıştır. Bu kaçış rampaları açılışının ilk 2,5 ayında 5 kazayı önlemiştir. Bu çalışmada, Tarsus-Pozantı otoyolundaki kaçış rampalarında kullanılan agregaların geoteknik özellikleri araştırılmıştır. Bu kapsamda sınıflama, yuvarlaklık, birim hacim ağırlık, elek analizi, suda yıpranma, su emme, Los Angeles aşınma kaybı, donma-çözünme, alkali-silika reaktivitesi, organik madde ve kimyasal içerik/XRF analizleri yapılmıştır. Buna göre, yuvarlak-yarı yuvarlak şekilli danelerden oluşan ve organik madde içermeyen malzemenin sınıfı GP (kötü derecelenmiş çakıl), kütle birim hacim ağırlığı 2,36 g/cm 3 , suda yıpranma dayanıklılığı %99,46, ağırlıkça su emme oranı %1,55, Los Angeles aşınma kaybı %20,40, donma-çözünme kütle kaybı %7,4, alkali-silika reaktivitesi zararsız olarak çıkmıştır. Bu sonuçlara göre üzerinde çalışma yapılan kaçış rampalarında kullanılan agregalar şartname değerleri açısından uygundur.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.