The rotation motion is one of the most basic dynamic units, whose accurate measure-ment is essential to the aspects of inertial navigation, mechanical manufacturing, robot control. Currently, the laser interferometry (LI), the sensor-based and autocollimator-based methods are commonly applied to the rotation motion measurement. However, they are always difficult to meet the requirements of high-accuracy measurement and wide frequency range. In this study, a novel monocular vision-based measurement method is investigated, which determines the angular rate and angular acceleration by using the improved line segmentation detector (LSD) method with sub-pixel accuracy and simultaneously improves the measurement accuracy and frequency range. Additionally, its hardware implementation only requires a simple and flexible vision measurement system. Several comparison experiments with the LI and grating sensor-based method demonstrate that the investigated method can obtain the measurement resolution of 0.0005° and accuracy of 0.480% in the range from 0.001 to 10 Hz.
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http://dx.doi.org/10.1364/OE.475362 | DOI Listing |
Med Biol Eng Comput
January 2025
Biomedical Engineering, Bahçeşehir University, Çırağan Caddesi Osmanpaşa Mektebi Sokak No: 4-6 Beşiktaş, İstanbul, 34353, Turkey.
This study aims to understand the impact of backpack carriage, a regular activity for many, on back muscles and joint mobility during walking so that clinicians can develop strategies or products to ensure individuals' safety and well-being. Surface electromyography (EMG) and XSENS Awinda motion capture systems were used to analyze the effects of carrying a backpack (12% of body weight) on erector spinae and multifidus muscles, as well as spinal, hip, knee, and ankle joints. Subjects walked at 4 km/h on flat and inclined surfaces.
View Article and Find Full Text PDFJ Clin Med
January 2025
Division of Shoulder Sports Medicine and Arthroplasty, Department of Orthopedic Surgery, Jeju National University Hospital, Jeju 63241, Republic of Korea.
To evaluate the clinical and radiologic outcomes of arthroscopic augmented partial repair (APR) with acellular dermal matrix versus arthroscopic superior capsular reconstruction (SCR) in massive rotator cuff tears. The study included a total of 49 patients with massive rotator cuff tears who underwent arthroscopic APR (26 patients) and SCR (23 patients) between March 2018 and June 2021. Clinical scores, visual analog scores, and range of motion were collected preoperatively and postoperatively until the last follow-up.
View Article and Find Full Text PDFSensors (Basel)
December 2024
Engineering for Health Research Centre, Aston University, Aston Triangle, Birmingham B4 7ET, UK.
Human hands have over 20 degrees of freedom, enabled by a complex system of bones, muscles, and joints. Hand differences can significantly impair dexterity and independence in daily activities. Accurate assessment of hand function, particularly digit movement, is vital for effective intervention and rehabilitation.
View Article and Find Full Text PDFBMC Musculoskelet Disord
January 2025
Orthopedics, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China.
Background: Transforaminal lumbar interbody fusion (TLIF) surgery has become increasingly popular in the surgical treatment of lumbar degenerative diseases. The optimal structure for stable double-segment fixation remains unclear.
Objective: To compare the biomechanical changes of unilateral fixation versus bilateral fixation in patients with lumbar degeneration undergoing double-segment TLIF surgery, and to explore the stability and feasibility of unilateral double-segment fixation.
Sci Rep
January 2025
Department of Orthopedics, The Third Affiliated Hospital of Anhui Medical University, The First People's Hospital of Hefei), 390 Huaihe Road, Hefei, 230061, Anhui, China.
The aim of this study was to analyze the outcomes of arthroscopic subscapularis tendon repair combined with coracoplasty in the treatment. The study involved 80 patients (46 males, 34 females; aged 33 to 73 years), who underwent arthroscopic repair for subscapularis tears (type I, II, and III) presenting symptoms of anterior shoulder pain and tenderness. Subcoracoid impingement was defined as a coracohumeral distance of less than 6 mm on preoperative magnetic resonance imaging, with a follow-up of was at least two years.
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