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https://www.readbyqxmd.com/read/28548921/repeatability-testing-of-a-new-hybrid-iii-6-year-old-atd-lower-extremity
#1
Laura C Boucher, Yeonsu Ryu, Yun-Seok Kang, John H Bolte
OBJECTIVE: Vehicle safety is improving, thus decreasing the number of life-threatening injuries and increasing the need for research in other areas of the body. The current child anthropomorphic test device (ATD) does not have the capabilities or instrumentation to measure many of the potential interactions between the lower extremity and the vehicle interior. A prototype Hybrid III 6-year-old ATD lower extremity (ATD-LE) was developed and contains a tibia load cell and a more biofidelic ankle...
May 29, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28548827/dynamic-disorder-and-electronic-structures-of-electron-precise-dianionic-diboranes-insights-from-solid-state-multinuclear-magnetic-resonance-spectroscopy
#2
Y T Angel Wong, Johannes Landmann, Maik Finze, David L Bryce
The J(11B, 11B) coupling constants of various salts of the electron-precise hexacyanodiborane(6) dianion, [B2(CN)6]2-, were obtained using 11B double-quantum filtered (DQF) J-resolved solid-state nuclear magnetic resonance (SSNMR) spectroscopy. Our results show that the magnitude of the DQF J splitting is influenced by both the crystallo-graphic symmetry of the system and the presence of dynamics. The splittings are amplified by a factor of 3 as compared to the corresponding theoretical J coupling constants for cases where 1) there is an absence of dynamics but the boron pairs are crystallographically equivalent, or 2) the boron pairs are crystallographically inequivalent but are rendered magnetically equivalent on the timescale of the experiment due to dynamic disorder, which was identified by 11B and 13C SSNMR experiments...
May 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28547248/inferior-glenoid-fossa-fractures-patho-anatomy-and-results-of-operative-treatment
#3
Jan Bartoníček, Michal Tuček, Daniel Klika
INTRODUCTION: A typical feature of inferior glenoid fractures is a distal fragment separated from the glenoid fossa. In most cases, the inferior glenoid fractures are associated with a fracture of the scapular body. However, there are no detailed studies of inferior glenoid fractures, and only brief mentions can be found in the literature in this respect. MATERIAL AND METHODS: The basic group comprised 42 patients, with the mean age of 48 years, who sustained 42 fractures of the inferior glenoid...
May 25, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28545773/influence-of-body-mass-index-on-sagittal-knee-range-of-motion-and-gait-speed-recovery-1-year-after-total-knee-arthroplasty
#4
Alice Bonnefoy-Mazure, Pierre Martz, Stéphane Armand, Yoshimasa Sagawa, Domizio Suva, Katia Turcot, Hermes H Miozzari, Anne Lübbeke
BACKGROUND: The purpose of this prospective study was to investigate the influence of body mass index (BMI) on gait parameters preoperatively and 1 year after total knee arthroplasty (TKA). METHODS: Seventy-nine patients were evaluated before and 1 year after TKA using clinical gait analysis. The gait velocity, the knee range of motion (ROM) during gait, their gains (difference between baseline and 1 year after TKA), the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), quality of life, and patient satisfaction were assessed...
March 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28545718/the-effect-of-glenoid-component-version-and-humeral-polyethylene-liner-rotation-on-subluxation-and-impingement-in-reverse-shoulder-arthroplasty
#5
Vijay N Permeswaran, Andrea Caceres, Jessica E Goetz, Donald D Anderson, Carolyn M Hettrich
BACKGROUND: A previously validated finite element modeling approach was used to determine how changes in glenoid component version and polyethylene liner rotation within the humeral component affect the arm abduction angle at which impingement between the inferior glenoid and the polyethylene liner occurs as well as the amount of subluxation generated by that impingement. MATERIALS AND METHODS: Five glenoid component versions (5° anteversion; neutral; 5°, 10°, and 20° retroversion) and 7 polyethylene liner rotations (20° and 10° anterior; neutral; 10°, 20°, 30°, and 40° posterior) were considered, resulting in 35 different clinically representative models...
May 22, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28545717/preseason-screening-of-shoulder-range-of-motion-and-humeral-retrotorsion-does-not-predict-injury-in-high-school-baseball-players
#6
Sakiko Oyama, Elizabeth E Hibberd, Joseph B Myers
BACKGROUND: Shoulder and elbow injuries are commonplace in high school baseball. Although altered shoulder range of motion (ROM) and humeral retrotorsion angles have been associated with injuries, the efficacy of preseason screening of these characteristics remains controversial. METHODS: We conducted preseason screenings for shoulder internal and external rotation ROM and humeral retrotorsion on 832 high school baseball players and tracked their exposure and incidence on throwing-related shoulder and elbow injuries during a subsequent season...
May 22, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28545525/rotational-alignment-of-femoral-component-with-different-methods-in-total-knee-arthroplasty-a-randomized-controlled-trial
#7
Joon Kyu Lee, Sahnghoon Lee, Sae Hyung Chun, Ki Tae Kim, Myung Chul Lee
BACKGROUND: Femoral component rotation (FCR) is one of the most important factors in total knee arthroplasty. In this prospective study, we used three different techniques for FCR and analyzed their accuracy with postoperative axial computed tomography (CT) images. We also evaluated effect of FCR to clinical outcome. METHODS: One hundred sixty-five patients were randomly allocated into three groups. In the measured resection group, FCR was set by externally rotating the axis 3° off the posterior femoral condylar axis...
May 25, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28545245/multimodal-bio-inspired-tactile-sensing-module-for-surface-characterization
#8
Thiago Eustaquio Alves de Oliveira, Ana-Maria Cretu, Emil M Petriu
Robots are expected to recognize the properties of objects in order to handle them safely and efficiently in a variety of applications, such as health and elder care, manufacturing, or high-risk environments. This paper explores the issue of surface characterization by monitoring the signals acquired by a novel bio-inspired tactile probe in contact with ridged surfaces. The tactile module comprises a nine Degree of Freedom Microelectromechanical Magnetic, Angular Rate, and Gravity system (9-DOF MEMS MARG) and a deep MEMS pressure sensor embedded in a compliant structure that mimics the function and the organization of mechanoreceptors in human skin as well as the hardness of the human skin...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28545174/causes-and-clinical-outcomes-of-revision-total-knee-arthroplasty
#9
Dong-Hyun Lee, Seung-Hun Lee, Eun-Kyoo Song, Jong-Keun Seon, Hong-An Lim, Hong-Yeol Yang
Purpose: The purpose of this study was to evaluate causes and clinical outcomes of revision total knee arthroplasty (TKA) with a minimum 2-year follow-up. Materials and Methods: We performed a retrospective review on the records of 225 revision TKAs performed from 2003 to 2012 at a single institution. Finally, 206 cases were conducted. To evaluate clinical outcomes, we checked the range of motion (ROM), Knee Society (KS) score, Hospital for Special Surgery (HSS) score, and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score preoperatively, 6 months postoperatively and yearly thereafter and complications after revision TKA...
June 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/28543714/motor-function-domains-in-alternating-hemiplegia-of-childhood
#10
Melanie Masoud, Kelly Gordon, Amanda Hall, Joan Jasien, Kara Lardinois, Julie Uchitel, Melissa Mclean, Lyndsey Prange, Jeffrey Wuchich, Mohamad A Mikati
AIM: To characterize motor function profiles in alternating hemiplegia of childhood, and to investigate interrelationships between these domains and with age. METHOD: We studied a cohort of 23 patients (9 males, 14 females; mean age 9y 4mo, range 4mo-43y) who underwent standardized tests to assess gross motor, upper extremity motor control, motor speech, and dysphagia functions. RESULTS: Gross Motor Function Classification System (GMFCS), Gross Motor Function Measure-88 (GMFM-88), Manual Ability Classification System (MACS), and Revised Melbourne Assessment (MA2) scales manifested predominantly mild impairments; motor speech, moderate to severe; Modified Dysphagia Outcome and Severity Scale (M-DOSS), mild-to moderate deficits...
May 25, 2017: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/28543369/directing-clinical-care-using-lower-extremity-biomechanics-in-patients-with-ankle-osteoarthritis-and-ankle-arthroplasty
#11
REVIEW
Robin Queen
Ankle osteoarthritis is a debilitating disease with approximately 50,000 new cases per year leading to skeletal deformity, severe and recurrent pain, cartilage breakdown, and gait dysfunction limiting patient mobility and well-being. Although many treatments (total ankle arthroplasty (TAA), ankle fusion (arthrodesis), and ankle distraction arthroplasty) relieve pain, it is not clear that these procedures significantly improve patient mobility. The goal of the research presented here is to summarize what is presently known about lower extremity gait mechanics and outcomes and to quantify the impact of ankle osteoarthritis and TAA have on these measures using an explicitly holistic and mechanistic approach...
May 19, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28543304/biomechanical-comparison-between-pins-and-polymethylmethacrylate-and-the-sop-locking-plate-system-to-stabilize-canine-lumbosacral-fracture-luxation-in-flexion-and-extension
#12
Johannes J Nel, Cor-Jacques Kat, Gert L Coetzee, Paul J van Staden
OBJECTIVE: To determine the stability of a simulated complete L7-S1 fracture-luxation immobilized with SOP locking plate system, compared to pins and polymethylmethacrylate (PMMA). STUDY DESIGN: In vitro biomechanical study. ANIMALS: Cadaver specimens of 18 skeletally mature large-breed dogs. MATERIALS AND METHODS: Specimens were randomly stabilized with one of the two fixation techniques. Lumbosacral spine specimens (L5-S3) were subjected to a bending moment applied to the caudal and cranial ends of the specimen...
May 24, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28542072/effect-of-exercise-training-on-the-frequency-of-contracture-release-surgeries-in-burned-children
#13
Jong O Lee, David N Herndon, Clark Andersen, Oscar E Suman, Ted T Huang
BACKGROUND: Intensive physical exercise (IPE) increases strength, lean body mass, aerobic capacity, and range of motion in children with extensive burns. However, whether IPE decreases the frequency of burn scar contracture-releasing procedures in children with extensive burns is unknown. MATERIALS AND METHODS: Prospectively collected surgical records of 184 children who had undergone axilla, elbow, and/or wrist contracture-releasing procedures were reviewed. All children were 7 years or older and had sustained burns of at least 40% of the total body surface area...
May 25, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28541899/motion-compensated-compression-of-dynamic-voxelized-point-clouds
#14
Ricardo L De Queiroz, Philip A Chou
Dynamic point clouds are a potential new frontier in visual communication systems. A few articles have addressed the compression of point clouds, but very few references exist on exploring temporal redundancies. This paper presents a novel motion-compensated approach to encoding dynamic voxelized point clouds at low bit rates. A simple coder breaks the voxelized point cloud at each frame into blocks of voxels. Each block is either encoded in intra-frame mode or is replaced by a motion-compensated version of a block in the previous frame...
May 24, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28541693/shuttlecock-shaped-molecular-rectifier-asymmetric-electron-transport-coupled-with-controlled-molecular-motion
#15
Taekhee Ryu, Yves Lansac, Yun Hee Jang
A fullerene derivative with five hydroxyphenyl groups attached around a pentagon, (4-HOC6H4)5HC60 (1), has shown an asymmetric current-voltage (I-V) curve in a conducting atomic force microscopy experiment on gold. Such molecular rectification has been ascribed to the asymmetric distribution of frontier molecular orbitals over its shuttlecock-shaped structure. Our non-equilibrium Green's function (NEGF) calculations based on density functional theory (DFT) indeed exhibit an asymmetric I-V curve for 1 standing up between two Au (111) electrodes, but the resulted rectification ratio (RR ~ 3) is insufficient to explain the wide range of RR observed in experiments performed under a high bias voltage...
May 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28541324/a-cold-atom-fermi-hubbard-antiferromagnet
#16
Anton Mazurenko, Christie S Chiu, Geoffrey Ji, Maxwell F Parsons, Márton Kanász-Nagy, Richard Schmidt, Fabian Grusdt, Eugene Demler, Daniel Greif, Markus Greiner
Exotic phenomena in systems with strongly correlated electrons emerge from the interplay between spin and motional degrees of freedom. For example, doping an antiferromagnet is expected to give rise to pseudogap states and high-temperature superconductors. Quantum simulation using ultracold fermions in optical lattices could help to answer open questions about the doped Hubbard Hamiltonian, and has recently been advanced by quantum gas microscopy. Here we report the realization of an antiferromagnet in a repulsively interacting Fermi gas on a two-dimensional square lattice of about 80 sites at a temperature of 0...
May 24, 2017: Nature
https://www.readbyqxmd.com/read/28541292/long-range-allosteric-regulation-of-the-human-26s-proteasome-by-20s-proteasome-targeting-cancer-drugs
#17
David Haselbach, Jil Schrader, Felix Lambrecht, Fabian Henneberg, Ashwin Chari, Holger Stark
The proteasome holoenzyme is the major non-lysosomal protease; its proteolytic activity is essential for cellular homeostasis. Thus, it is an attractive target for the development of chemotherapeutics. While the structural basis of core particle (CP) inhibitors is largely understood, their structural impact on the proteasome holoenzyme remains entirely elusive. Here, we determined the structure of the 26S proteasome with and without the inhibitor Oprozomib. Drug binding modifies the energy landscape of conformational motion in the proteasome regulatory particle (RP)...
May 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28541225/stability-of-enzymatic-biosensors-for-wearable-applications
#18
Apurva Sonawane, Pandiaraj Manickam, Shekhar Bhansali
Technological evolution in wearable sensors is accounting for major growth and transformation in multitude of industries ranging from healthcare to computing & informatics to communication and biomedical sciences. The major driver for this transformation is the new-found ability to continuously monitor and analyze the patients' physiology in patients' natural setting. Numerous wearable sensors are already on the market and are summarized. Most of the current technologies have focused on electro-physiological, electro-mechanical or acoustic measurements...
May 19, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28539973/are-ultrasound-features-at-the-first-metatarsophalangeal-joint-associated-with-clinically-assessed-pain-and-function-a-study-of-people-with-gout-asymptomatic-hyperuricaemia-and-normouricaemia
#19
Sarah Stewart, Nicola Dalbeth, Alain C Vandal, Bruce Allen, Rhian Miranda, Keith Rome
BACKGROUND: The first metatatarsophalangeal joint (1st MTP joint) is a common location for sonographic evidence of urate deposition in people with gout and asymptomatic hyperuricaemia. However, it is unclear whether these are related to clinically-assessed pain and function. This study aimed to determine the association between ultrasound features and clinical characteristics of the 1st MTP joint in people with gout, asymptomatic hyperuricaemia and age- and sex-matched normouricaemic individuals...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28539520/independent-evolution-of-baleen-whale-gigantism-linked-to-plio-pleistocene-ocean-dynamics
#20
Graham J Slater, Jeremy A Goldbogen, Nicholas D Pyenson
Vertebrates have evolved to gigantic sizes repeatedly over the past 250 Myr, reaching their extreme in today's baleen whales (Mysticeti). Hypotheses for the evolution of exceptionally large size in mysticetes range from niche partitioning to predator avoidance, but there has been no quantitative examination of body size evolutionary dynamics in this clade and it remains unclear when, why or how gigantism evolved. By fitting phylogenetic macroevolutionary models to a dataset consisting of living and extinct species, we show that mysticetes underwent a clade-wide shift in their mode of body size evolution during the Plio-Pleistocene...
May 31, 2017: Proceedings. Biological Sciences
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