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Tongyang Li, Shaoping Wang, Enrico Zio, Jian Shi, Wei Hong
Leakage is the most important failure mode in aircraft hydraulic systems caused by wear and tear between friction pairs of components. The accurate detection of abrasive debris can reveal the wear condition and predict a system's lifespan. The radial magnetic field (RMF)-based debris detection method provides an online solution for monitoring the wear condition intuitively, which potentially enables a more accurate diagnosis and prognosis on the aviation hydraulic system's ongoing failures. To address the serious mixing of pipe abrasive debris, this paper focuses on the superimposed abrasive debris separation of an RMF abrasive sensor based on the degenerate unmixing estimation technique...
March 15, 2018: Sensors
Andrew MacQuarrie, Anthony Steed
360° images and video have become extremely popular formats for immersive displays, due in large part to the technical ease of content production. While many experiences use a single camera viewpoint, an increasing number of experiences use multiple camera locations. In such multi-view 360° media (MV360M) systems, a visual effect is required when the user transitions from one camera location to another. This effect can take several forms, such as a cut or an image-based warp, and the choice of effect may impact many aspects of the experience, including issues related to enjoyment and scene understanding...
April 2018: IEEE Transactions on Visualization and Computer Graphics
Sean McKenna, Marie Tierney, Aoife O'Neill, Alexander Fraser, Norelee Kennedy
Regular physical activity (PA) is important for people with rheumatoid arthritis (RA). Poor sleep is a common complaint among people with RA, which may have an influence on their PA levels. There is a lack of objective information regarding total sleep time (TST) and PA duration in this population. A cross-sectional study design was used. SenseWear Pro3 Armband(R)TM is used to measure TST and total PA duration. Four valid days, with 95% wear time necessary for inclusion in final results. Disease activity and function were measured using the DAS-28, HAQ and VAS...
March 14, 2018: Rheumatology International
Dawn M Holman, Helen Ding, Gery P Guy, Meg Watson, Anne M Hartman, Frank M Perna
Importance: Monitoring sun protection and sunburn over time at the population level can provide valuable information about progress toward skin cancer prevention goals and inform future intervention efforts. Objective: To examine the prevalence of sun protection use (shade, sunscreen, and clothing) and sunburn and the association between sunburn and individual characteristics and health behaviors in the US population. Design, Setting, and Participants: In this cross-sectional study using a nationally representative sample of 31 162 US adults from the 2015 National Health Interview Survey-Cancer Control Supplement, household interviews of civilian, noninstitutionalized US adults were conducted throughout 2015 in person and completed on the telephone when necessary...
March 14, 2018: JAMA Dermatology
Zhe Du, Shujun Wang, Bing Yue, Ying Wang, You Wang
T-cells, second only to macrophages, are often considered as the potential cells involved in debris-related failure of arthroplasty. Here, we assessed the effects of particulate wear debris on T-cells and inflammatory reactions. Blood samples from 25 donors were incubated with polyether-ether-ketone (PEEK) and cobalt-chromium-molybdenum (CoCrMo) particles generated by custom cryo-milling and pulverization. The T-cell phenotypes were assessed using immunostaining and flow cytometry. For the in vivo study, 0...
February 16, 2018: Oncotarget
Mohammad Nauzef Mahmood, Laura H C Peeters, Micha Paalman, Gijsbertus J Verkerke, Idsart Kingma, Jaap H van Dieën
BACKGROUND: Patients with Duchenne muscular dystrophy gradually lose the ability to use different muscles of their body. Consequently, they lose the ability to stabilize their trunk against gravity. This hinders them to effectively perform different daily activities. In this paper, we describe the design, realization and evaluation of a trunk orthosis for these patients that should allow them to move their trunk and maintain stability. METHOD: This study aimed to primarily assess the effectiveness of the trunk support system in terms of unloading of trunk muscles, so only healthy participants were recruited for this phase of the study...
March 14, 2018: Journal of Neuroengineering and Rehabilitation
Ana Paula Rebouças, Cristiane Baccin Bendo, Lucas Guimarães Abreu, Elizabeth Maria Bastos Lages, Carlos Flores-Mir, Saul Martins Paiva
The aim of this study was to translate and cross-culturally adapt the condition-specific instrument Impact of Fixed Appliances Measure (IFAM), assessing its validity and reliability for use among Brazilian children/adolescents. The IFAM was translated, back-translated, cross-culturally adapted, and pilot-tested. The Brazilian version of the IFAM (B-IFAM) was tested on 161 10-to-18-year-old children/adolescents. Internal consistency was assessed using Cronbach's alpha (α) and test-retest reliability by intraclass correlation coefficients (ICC)...
March 8, 2018: Brazilian Oral Research
Sachiko Udagawa, Shinji Ohkubo, Aiko Iwase, Yuto Susuki, Shiho Kunimatsu-Sanuki, Takeo Fukuchi, Chota Matsumoto, Yuko Ohno, Hiroshi Ono, Kazuhisa Sugiyama, Makoto Araie
PURPOSE: Traffic accidents are associated with the visual function of drivers, as well as many other factors. Driving simulator systems have the advantage of controlling for traffic- and automobile-related conditions, and using pinhole glasses can control the degree of concentric concentration of the visual field. We evaluated the effect of concentric constriction of the visual field on automobile driving, using driving simulator tests. METHODS: Subjects meeting criteria for normal eyesight were included in the study...
2018: PloS One
Bunny J Pozehl, Rita Mcguire, Kathleen Duncan, Melody Hertzog, Pallav Deka, Joseph Norman, Nancy T Artinian, Matthew A Saval, Steven J Keteyian
BACKGROUND: Few studies report objective accelerometer-measured daily physical activity levels in patients with heart failure (HF). OBJECTIVE: We examined baseline accelerometer-measured physical activity from the Heart Failure Exercise and Resistance Training Camp trial, a federally funded (R01-HL112979) 18-month intervention study to promote adherence to exercise in patients with HF. Factors associated with physical activity levels were also explored. METHODS: Patients with diagnosed HF (stage C chronic HF confirmed by echocardiography and clinical evaluation) were recruited from 2 urban medical centers...
March 12, 2018: Journal of Cardiovascular Nursing
Michael Sobieraj, Scott Marwin
Total joint arthroplasty of the hip and knee are successful orthopedic procedures that reduce pain and improve mobility in patients. As the implanted materials used in these procedures have improved, the lifetime of the implants has now reached more than 20 years. Younger patients are undergoing total joint arthroplasty at increasing rates, which has increased the need for improvements in materials for extended implant longevity. In this review, we aim to provide historical perspective on the evolution of ultra-high-molecular-weight polyethylene in total joint arthroplasty...
March 2018: Bulletin of the Hospital for Joint Diseases
Steffi L Colyer, Polly M McGuigan
Textile electromyography (EMG) electrodes embedded in clothing allow muscle excitation to be recorded in previously inaccessible settings; however, their ability to accurately and reliably measure EMG during dynamic tasks remains largely unexplored. To quantify the validity and reliability of textile electrodes, 16 recreationally active males completed two identical testing sessions, within which three functional movements (run, cycle and squat) were performed twice: once wearing EMG shorts (measuring quadriceps, hamstrings and gluteals myoelectric activity) and once with surface EMG electrodes attached to the vastus lateralis, biceps femoris and gluteus maximus...
March 2018: Journal of Sports Science & Medicine
Mitsuo Uchida, Minoru Kaneko, Yoshihiko Hidaka, Hiroshi Yamamoto, Takayuki Honda, Shouhei Takeuchi, Masaya Saito, Shigeyuki Kawa
BACKGROUND: Influenza virus transmission may be prevented by infection control measures, including vaccination, wearing a mask, gargling with water, and hand washing. It is unclear, however, whether these measures affect influenza epidemics in school settings. METHODS: A prospective epidemiological survey in all public elementary schools in Matsumoto City, Japan, during the 2014/2015 season evaluated the number of diagnosed patients in each school and calculated the reproduction number of schoolchildren...
March 13, 2018: BMC Infectious Diseases
Kerstin Hagberg
PURPOSE: To describe the rehabilitation experience and outcome of treatment with bone-anchored prostheses in individuals with bilateral transfemoral amputations (TFAs) treated in Sweden over a period of 25 years. METHOD: Hospital records were reviewed for all patients with traumatic bilateral TFAs treated until 2015. The use of prostheses, walking aids and wheelchairs was noted. RESULTS: The cohort comprised 12 patients (nine men and three women with a mean age 35 years at treatment) and the median follow-up time was seven years (1-20)...
March 14, 2018: Disability and Rehabilitation. Assistive Technology
Kenji Fugito Junior, Arthur Rodriguez Gonzalez Cortes, Ricardo de Carvalho Destro, Marcelo Yoshimoto
PURPOSE: The search for optimizing rehabilitation results with the use of osseointegrated implants has led oral surgeons to look for other technologies that can provide better predictability for treatments; however, effectiveness must be considered as well. This study aimed to compare temperature variation during preparation of implant surgical beds using conventional rotary implant burs versus ultrasonic tips and to study perforation effectiveness by analyzing the functional wear of both systems and the influence of such wear on the overheating of cortical bone...
March 2018: International Journal of Oral & Maxillofacial Implants
Evan D Muse, Nathan E Wineinger, Emily G Spencer, Melissa Peters, Riley Henderson, Yunyue Zhang, Paddy M Barrett, Steven P Rivera, Jay G Wohlgemuth, James J Devlin, Dov Shiffman, Eric J Topol
BACKGROUND: Atrial fibrillation (AF) is the most commonly encountered arrhythmia and is associated with an elevated risk of stroke. Improving the identification of patients with the highest risk for AF to enable appropriate surveillance and treatment, if necessary, is critical to reducing AF-associated morbidity and mortality. Multiple common single nucleotide polymorphisms (SNPs) are unequivocally associated with the lifetime risk of AF. In the current study we aimed to prospectively validate an AF genetic risk score (GRS) in previously undiagnosed patients at risk for AF...
March 2018: PLoS Medicine
M Demirci, S Tuncer, H S Sancakli, N Tekçe, C Baydemir
The purpose of this study was to evaluate a nanofilled and a nanohybrid composite, in combination with manufacturer-recommended etch-and-rinse adhesives, in class IV cavities. Thirty-four patients aged 14-46 years (mean age, 27.1 years) comprised the study group. Twenty-six patients received two class IV restorations and eight patients received four class IV restorations. For each patient, half the number of restorations were performed using a nanohybrid composite (Ceram X duo) and the remaining half used a nanofilled resin composite (Filtek Supreme XT), with two- (XP Bond) and three-step (Scotchbond Multipurpose) etch-and-rinse adhesives, respectively...
March 13, 2018: Operative Dentistry
Timothy M Wright
The introduction of highly crosslinked forms of ultra high molecular weight polyethylene (UHMWPE) is a major development in the history of total joint replacement. The first commercially available forms of these materials are now nearing the completion of two decades of use as bearing materials for hip replacements, and the improved wear resistance afforded by the crosslinking1 has been borne out by a marked lowering of wear rates measured in vivo.
March 13, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Thomas Wesarg, Bettina Voss, Frederike Hassepass, Rainer Beck, Antje Aschendorff, Roland Laszig, Susan Arndt
OBJECTIVE: To investigate the impact of the wearing position of an off-the-ear-processor (OTE) on speech perception in quiet and noise. PATIENTS: The study group consisted of 16 adult subjects with bilateral severe-to-profound sensorineural hearing loss, 2 of them unilaterally, and 14 bilaterally provided with cochlear implants. MAIN OUTCOME MEASURES: Speech perception in quiet and noise was measured for frontal presentation with the recipients behind-the-ear processor CP810 or CP910 and the OTE processor Kanso (Cochlear Limited, Sydney, Australia)...
April 2018: Otology & Neurotology
Severine L. Staub, Eckart Teubner, Nicola U. Zitzmann
The aim of this retrospective study was to investigate the clinical outcome of Dalbo®-Rotex® retention elements in a private practice. The majority of the retention elements was fixed with self-adhesive composite cement, and in almost 40% the exposed root surface was additionally covered with composite. The success rate of 96.3% after 24 months in a total of 50 included patients (response rate 48.5%) demonstrated that a simple and cost-effective fixation of removable dentures using prefabricated, chair-side inserted retention elements is feasible...
March 12, 2018: Swiss Dental Journal
Pune N Tawakoli, Klaus Becker, Thomas Attin
This study was to analyse the abrasive wear of differently composed diamond dentifrices loaded with 2.4 μm diamond particles on dentine and enamel surfaces in vitro. Bovine specimens were brushed with a diamond-loaded dentifrice (DD2; 2 g particles/kg), a diamond-loaded dentifrice (1.5 g/kg) containing 20% hydrated silica as extra abrasive (DD1.5+S), or a diamond-loaded dentifrice (3 g/kg) containing 20% hydrated silica abrasive (DD3+S). Values were compared to those obtained with Colgate Total (CT) and Elmex Sensitive plus (ES)...
January 15, 2018: Swiss Dental Journal
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