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- 저자 : Wong Yu Cong (검색결과 2 건)
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Mapping the Posterior Ledge and Optic Foramen in Orbital Floor Blowout Fractures
Wong Yu Cong,Goh Doreen S.L.,Yoong Celine S.Y.,Ho Cowan,Cai Elijah Z.,Hing Angela,Lee Hanjing,Nallathamby Vigneswaran,Yap Yan L.,Lim Jane,Gangadhara Sundar,Lim Thiam C. 대한성형외과학회 2023 Archives of Plastic Surgery Vol.50 No.4
Background The posterior ledge (PL) is a vital structure that supports the implant posteriorly during orbital floor reconstruction. This study describes a technique for mapping the PL in relation to the infraorbital margin (IM) in patients with orbital floor blowout fractures. This study establishes the location of the optic foramen in relation to the PL. Methods Facial computed tomography (FCT) scans of 67 consecutive patients with isolated orbital floor blowout fractures were analyzed using Osirix. Planes of reference for orbital fractures, a standardized technique for performing measurements on FCT, was used. Viewed coronally, the orbit was divided into seven equal sagittal slices (L1 laterally to L7 medially) with reference to themidorbital plane. The distances of PL from IM and location of optic foramen were determined. Results The greatest distance to PL is found at L5 (median: 30.1mm, range: 13.5– 37.1mm). The median and ranges for each slice are as follows: L1 (median: 0.0mm, range: 0.0–19.9mm), L2 (median: 0.0mm, range: 0.0–21.5mm), L3 (median: 15.8mm, range: 0.0–31.7mm), L4 (median: 26.1mm, range: 0.0–34.0mm), L5 (median: 30.1mm, range: 13.5–37.1mm), L6 (median: 29.0mm, range: 0.0– 36.3mm), L7 (median: 20.8mm, range: 0.0–39.2mm). The median distance of the optic foramen from IM is 43.7mm (range: 37.0– 49.1) at L7.
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Ao Di,Wong Pak Kin,Huang Wei,Mei Xing Tai,Cao Yu Cong,Zhao Jing 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.6
The assessment of vehicle dynamic comfort to human body vibration varies from person to person. Even though the dynamic comfort rating can be obtained by placing measurement devices over the cabin, passengers may have dissimilar sensations. For many car manufacturers, both subject and objective measurements are used together at development of new cars. To effectively assess the dynamic comfort of vehicle, this research explores the correlation between the objective measurement of the whole body vibration, hand-transmitted vibration and subjective assessment. The whole body vibration is measured from the backrest, seat surface and vehicle floor, whereas the hand-transmitted vibration is measured from the steering wheel. Four different vehicles are driven at various speeds on five types of pavements. Both simple linear regression and polynomial regression models based on Stevens’s power law from psychophysics are built to correlate the subjective and objective data. The regression results show that (1) the seat surface is more reliable than other positions for assessing the human body vibration; (2) the hand transmitted vibration on rough roads is more trustful for dynamic comfort evaluation than on smooth roads; (3) the overall dynamic comfort value is the most reliable index for dynamic comfort evaluation.
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