2,341 results match your criteria horizontal displacement


New modification of the acoustic Lamb waves and its application for liquid and ice sensing.

Ultrasonics 2021 Jun 7;116:106496. Epub 2021 Jun 7.

Acoustoelectronic and Piezokeramic ELPA Corporation Moscow, Russia.

Using quartz plates as an example existance of the new modification of the Lamb waves is demonstrated. The waves have small vertical displacement, large shear-horizontal and longitudinal components, and elliptic polarization which is oriented parallel to the plate faces. Numerical calculations of the surface displacements and depth profiles show the particular polarization is maintained at any depth from free faces and for all plate thickness in the range h/λ = 0-1. Read More

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Is there a Difference in Whole Body Standing Posture in Women with Urinary Incontinence Based on the Presence of Myofascial Dysfunction in the Pelvic Floor Muscles?

Phys Ther 2021 Jul 6. Epub 2021 Jul 6.

Department of Obstetrics and Gynecology, School of Medicine, University of Campinas (UNICAMP), Campinas, Brazil.

Objective: The purpose of this study was to assess the prevalence of postural changes in women who had urinary incontinence (UI) with myofascial dysfunction (MD) and women who had UI without MD in the pelvic floor muscles (PFM).

Methods: A cross-sectional study was performed with 234 women who had UI and were 18 years old or older at the urogynecology outpatient clinic of a tertiary academic hospital. The International Consultation on Incontinence Questionnaire-Short Form and the International Consultation on Incontinence Questionnaire-Overactive Bladder were used to collect urinary data. Read More

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Analysis of the Static Behavior of a Single Tree on a Finite Element Model.

Plants (Basel) 2021 Jun 24;10(7). Epub 2021 Jun 24.

Department of Ecology and Environmental Sciences, Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Trieda A. Hlinku 1, 949 74 Nitra, Slovakia.

This work deals with the innovated complex process of tree risk assessment, from precise geometrical tree shape acquisition to building and analyzing a finite element model under specified load. The acquisition of the 3D geometry of the tree was performed by means of terrestrial laser scanning. Obtained point cloud was optimized and additionally converted to a 3D CAD model, representing the bearing skeleton compound of trunk and main branches. Read More

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Evaluation of stability and esthetic outcome following rigid fixation of a new sagittal genioplasty technique - A clinical study.

Natl J Maxillofac Surg 2021 Jan-Apr;12(1):17-24. Epub 2021 Mar 16.

Department of Orthodontic and Dentofacial Orthopedics, Subharti Dental College and Hospital, Meerut, Uttar Pradesh, India.

Background: Routine and popular conventional genioplasty procedure is often curvilinear, requires lower border extension below, and behind the mental foramen, which after advancement has a tendency to produce step deformity, butt contact, hence nonunion, instability, and increased relapse tendencies. The present technique is aimed to study the new sagittal genioplasty technique and its efficacy to overcome the above-mentioned drawbacks of conventional genioplasty. This technique also aids in correcting mild-to-moderate breathing irregularities. Read More

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Dynamic anti-plane behavior of rare earth giant magnetostrictive medium with a circular cavity defect in semi-space.

Authors:
Zhiwei Liu Hui Qi

Sci Rep 2021 Jun 29;11(1):13442. Epub 2021 Jun 29.

College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, China.

An analytical solution to the anti-plane dynamics problem of semi-space rare earth giant magnetostrictive media with circular cavity defects near the horizontal boundary under the action of SH wave is studied. Based on the Helmholtz theorem and the theory of complex function, the elastic-magnetic dynamic equation of magnetostrictive medium is established, and the semi-space incident wave field is written. In addition, based on the theory of complex function and the method of wave function expansion, the expression of the wave function of the scattered displacement field and the corresponding magnetic potential of the scattered wave under the condition of no stress and magnetic insulation of the horizontal boundary are obtained. Read More

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Research on direct shear strength characteristics of mechanically biologically treated waste.

Environ Sci Pollut Res Int 2021 Jun 19. Epub 2021 Jun 19.

School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, 310018, China.

AbstractMechanically and biologically treated (MBT) waste has significant characteristics such as high stability and low moisture content, which can reduce water, soil, and gas pollution in subsequent treatments. This pre-treatment method is environmentally friendly and sustainable and has become a popular research topic in the field of environmental geotechnical engineering. Using a direct shear test apparatus and five shearing rates (0. Read More

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Design and validation of an MRI-compatible mechatronic system for needle delivery to localized prostate cancer.

Med Phys 2021 Jun 16. Epub 2021 Jun 16.

School of Biomedical Engineering, Faculty of Engineering, Western University, London, Ontario, Canada.

Purpose: Prostate cancer is the most common non-cutaneous cancer among men in the United States and is the second leading cause of cancer death in American men. (Siegel et al. [2019] CA: A Cancer J Clin. Read More

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Parametric analysis of landing injury : The effect of landing posture and joint displacement.

Phys Eng Sci Med 2021 Jun 14. Epub 2021 Jun 14.

Department of Mechanical Engineering, College of Engineering, University of Tehran, 1417466191, Tehran, Iran.

During landing, the lower limb joints work concertedly to reduce landing forces. Changing the biomechanics of one joint can alter landing strategies in other joints thus affecting the probability of injury. Therefore, understanding the mutual effects between the joints is crucial for the prevention of lower extremity injuries. Read More

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Anterior horizontal rafting plate to treat complex osteoporotic tibial plateau fractures: a technical note.

Acta Orthop Traumatol Turc 2021 May;55(3):271-276

Department of Orthopaedics, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang China.

Complex tibial plateau fractures in elderly patients exhibiting severe osteoporosis and articular surface collapse are challenging. Decision-making is difficult when the posterior column is involved. Open reduction and internal fixation of complex tibial plateau fractures in patients with severe osteoporosis are prone to failure. Read More

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Biomechanical effect of selective osteotomy and corticotomy on orthodontic molar uprighting.

Am J Orthod Dentofacial Orthop 2021 Jun 4. Epub 2021 Jun 4.

Private practice, and Department of Orthodontics, James B. Edwards College of Dental Medicine, Medical University of South Carolina, Charleston, SC. Electronic address:

Introduction: Uprighting mesially tipped molars is often a necessary step before implant placement. However, the orthodontic treatment can be lengthy and discourage patients from choosing implant prostheses. Periodontally accelerated osteogenic orthodontics is reported to facilitate molar movements. Read More

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[Study of sequential surgical guide assisting full arch immediate implant placement and provisionalization in patients with severe periodontitis].

Zhonghua Kou Qiang Yi Xue Za Zhi 2021 Jun;56(6):576-580

Center for Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.

To explore the technical process and the therapeutic effect of using sequential surgical guide with independent intellectual property rights assisting immediate implantation and restoration of the full arch, with the support from the periodontal splint for mobile supporting teeth, patients with severe periodontitis who planned to undergo immediate full arch implantation were recruited from August 2019 to December 2020 at the Department of Prosthodontics, Department of Periodontology, Department of Implantology and First Clinical Division, Peking University School and Hospital of Stomatology. Through the procedure of collecting preoperative maxillofacial data, making systematic diagnostic design, making periodontal splints fixation, producing surgical guide, and carrying out guided surgery for full arch immediate implantation, eight cases were included. By registering the postoperative cone-beam CT (CBCT) with the preoperative data, the difference between the actual three-dimensional position of the implants and the virtual design was observed, and the accuracy of the implant placement position guided by the sequential guide was statistically analyzed using SPSS 25. Read More

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Evaluation of horizontal condylar angle in malocclusions with mandibular lateral displacement using cone-beam computed tomography.

Angle Orthod 2021 Jun 7. Epub 2021 Jun 7.

Objectives: To evaluate the horizontal condylar angle (HCA) in mandibular lateral displacement (MLD).

Materials And Method: s: HCA in MLD malocclusions were examined using cone-beam computed tomography data in subjects with MLD and control subjects.

Results: HCA in joints of control patients and contralateral side joints of MLD patients were not significantly different. Read More

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Conservative Non-Surgical Management of Horizontal Root-Fractured Maxillary Incisors in a Young Male with Angle Class II, Division 2, Malocclusion.

Dent J (Basel) 2021 May 12;9(5). Epub 2021 May 12.

Department of Surgical Sciences, Sports Dental Research Center, University of Cagliari, Via Ospedale 40, 09124 Cagliari, Italy.

Horizontal root fractures are a rare emergency in a dental office. The injury involves periodontal ligament, cementum, dentine and pulp. The healing is influenced by the location of the root fracture, the displacement of the fragments and the status of the pulp. Read More

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Anterior Odontoid Screw Fixation for C2 Fractures: Surgical Nuances, Complications, and Factors Affecting Fracture Union.

World Neurosurg 2021 May 28. Epub 2021 May 28.

Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bangalore, India. Electronic address:

Objective: Type II odontoid fractures are the commonest C2 fractures. The management of dens fractures remains controversial with various radiological and fracture morphological factors affecting the approach and outcomes.

Methods: All cases of anterior odontoid screw fixation between 2010 and 2020 were retrospectively analyzed. Read More

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Design Optimization of a Pneumatic Soft Robotic Actuator Using Model-Based Optimization and Deep Reinforcement Learning.

Front Robot AI 2021 7;8:639102. Epub 2021 May 7.

Department of Mechanical Engineering, Rowan University, Glassboro, NJ, United States.

We present two frameworks for design optimization of a multi-chamber pneumatic-driven soft actuator to optimize its mechanical performance. The design goal is to achieve maximal horizontal motion of the top surface of the actuator with a minimum effect on its vertical motion. The parametric shape and layout of air chambers are optimized individually with the firefly algorithm and a deep reinforcement learning approach using both a model-based formulation and finite element analysis. Read More

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Exploring the time-course and the reference frames of adaptation to optical prisms and its aftereffects.

Cortex 2021 Aug 24;141:16-35. Epub 2021 Apr 24.

Department of Psychology, University of Milano-Bicocca, Milan, Italy; Neuropsychological Laboratory, Istituto di Ricovero e Cura a Carattere Scientifico Istituto Auxologico Italiano, Milan, Italy. Electronic address:

Prism adaptation (PA) is used to investigate visuo-motor plasticity and to rehabilitate the syndrome of Unilateral Spatial Neglect (USN). After PA, participants show aftereffects (AEs), contralateral to the side of the optical displacement in several tasks. This study explored the features of these AEs, specifically the "egocentric" versus "allocentric, object-based", reference frames involved, and their time course. Read More

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Effects of horizontal versus vertical bolster alignment on anatomical orientation of kidney as applied to prone percutaneous nephrolithotomy.

World J Urol 2021 May 21. Epub 2021 May 21.

Department of Urology, All India Institute of Medical Sciences, New Delhi, 110029, India.

Purpose: To evaluate the anatomical changes in kidney orientation in prone position with use of horizontal or vertical bolster alignment.

Methods: Patients having renal stone(s) on ultrasonogram or X-ray underwent split bolus computed-tomo-urography (CTU) in prone position with horizontal and vertical bolster positions. CTUs were read by a single radiologist to quantify the cranio-caudal, antero-posterior, side to side and rotational movements of kidneys as relevant to prone percutaneous nephrolithotomy. Read More

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Extractable surface proteins of indigenous probiotic strains confer anti-adhesion knack and protect against methicillin-resistant Staphylococcus aureus induced epithelial hyperpermeability in HT-29 cell line.

Microb Pathog 2021 May 18;158:104974. Epub 2021 May 18.

Molecular Biology Unit, Dairy Microbiology Division, ICAR-National Dairy Research Institute, Karnal, 132001, Haryana, India. Electronic address:

Probiotic intervention has been long believed to have beneficial effects on human health by curbing the intestinal colonization of pathogens. However, the application of live probiotics therapy may not be an ideal approach to circumvent the infections of superbug origin due to the risk of horizontal antibiotic resistance genes transfer. In this study, the anti-adhesion ability of extractable cell surface proteins from two indigenous potential probiotic strains (Lactiplantibacillus plantarum A5 and Limosilactobacillus fermentum Lf1) and two standard reference strains (Lactobacillus acidophilus NCFM and Lacticaseibacillus rhamnosus LGG) was evaluated against clinical isolates of Methicillin-Resistant Staphylococcus aureus (MRSA) on porcine gastric mucin and HT-29 cells. Read More

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Study on the earth pressure of a foundation pit adjacent to a composite foundation with rigid-flexible and long-short piles.

PLoS One 2021 20;16(5):e0251985. Epub 2021 May 20.

School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan, China.

Model tests were performed to investigate the lateral earth pressure acting on the retaining structure adjacent to both natural ground (NG) and composite foundation (CFRLP), which were supported with rigid-flexible and long-short piles. Two testing procedures, namely, applying a load to the foundation and rotating the retaining structure along its toe, were considered. The results indicate that the additional lateral earth pressure acting on the retaining structure adjacent to the CFRLP is less than that of the NG in the depth of the reinforcement area strengthened by flexible piles. Read More

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Displacement between anterior chamber width obtained by swept-source anterior segment optical coherence tomography and white-to-white distance.

PLoS One 2021 20;16(5):e0251990. Epub 2021 May 20.

Department of Ophthalmology, University of California, San Francisco, San Francisco, California, United States of America.

Purpose: To determine the relationship between the external limbal location, represented by white-to-white (WTW) distance, and the actual angle location, represented by spur-to-spur (STS) and angle-to-angle (ATA) distances.

Methods: 166 eyes from 166 participants were imaged using CASIA2 anterior chamber optical coherence tomography (AS-OCT) and LenStar LS 900 optical biometer. The horizontal ATA and STS were measured using the swept-source Fourier-domain AS-OCT (CASIA2). Read More

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The influence of the correlation-covariance structure of measurement errors over uncertainties propagation in online monitoring: application to environmental indicators in SUDS.

Environ Monit Assess 2021 May 20;193(6):345. Epub 2021 May 20.

Department of Civil Engineering, School of Engineering, Pontificia Universidad Javeriana, Bogotá, Colombia.

This paper presents a methodology to assess the influence of the correlation-covariance structure of measurement errors in online monitoring over the propagation of uncertainties, applied to wet-weather environmental indicators in sustainable urban drainage systems (SUDSs). The effect of auto-correlated and heteroskedastic errors in measured time-series over the estimated probability density function (PDF) of different environmental indicators is analyzed for a wide variety of possible error structures in the data. For this purpose, multiple correlation-covariance structures are randomly generated from exploring the parametric space of a linear exponent autoregressive (LEAR) model, employing a Bayesian-based Markov Chain Monte Carlo sampling technique. Read More

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Surgical debridement and primary closure of the oral mucosa for repair of open mandibular pars incisiva fractures in three neonatal calves.

J Am Vet Med Assoc 2021 Jun;258(11):1254-1258

Case Description: 3 neonatal female calves (ages, < 1 to 4 days) were examined because of mandibular trauma.

Clinical Findings: Physical examination indicated that each calf had an open fracture of the mandibular pars incisiva (rostral mandibular fracture) with ventral displacement of the incisors at the affected region. Oral radiographs were obtained for 1 calf and revealed that 5 incisors were fractured at the level of the apical dental buds. Read More

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Understanding airspace in leaves: 3D anatomy and directional tortuosity.

Plant Cell Environ 2021 Aug 25;44(8):2455-2465. Epub 2021 May 25.

School of Life and Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia.

The leaf intercellular airspace is a tortuous environment consisting of cells of different shapes, packing densities, and orientation, all of which have an effect on the travelling distance of molecules from the stomata to the mesophyll cell surfaces. Tortuosity, the increase in displacement over the actual distance between two points, is typically defined as encompassing the whole leaf airspace, but heterogeneity in pore dimensions and orientation between the spongy and palisade mesophyll likely result in heterogeneity in tortuosity along different axes and would predict longer traveling distance along the path of least tortuosity, such as vertically within the columnar cell matrix of the palisade layer. Here, we compare a previously established geometric method to a random walk approach, novel for this analysis in plant leaves, in four different Eucalyptus species. Read More

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Visuomotor control of leaping over a raised obstacle is sensitive to small baseline displacements.

R Soc Open Sci 2021 Mar 10;8(3):201877. Epub 2021 Mar 10.

Queen's School of Engineering, University of Bristol, Bristol, UK.

The limb kinematics used for stepping or leaping over an obstacle are determined primarily by visual sensing of obstacle position and geometry. In this study, we demonstrate that changes are induced in limb kinematics even when obstacle geometry is manipulated in a way that does not introduce a mechanical requirement for a change of limb trajectory nor increase risk of collision. Human participants performed a running leap over a single raised obstacle bar. Read More

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Sonographic Measurement of Dynamic Horizontal Instability in Acromioclavicular Joint Instability: Description of a Simple Technique and Correlation to Radiographic Parameters.

J Ultrasound Med 2021 May 6. Epub 2021 May 6.

Department of Sports Orthopaedics, St. Vinzenz Hospital, Düsseldorf, Germany.

Objective: Dynamic horizontal instability is considered to be the main reason for poor outcome after treatment for acromioclavicular (ac) joint instability. In this study, we describe a simple technique to quantify this pathology via sonography.

Methods: Thirty-six shoulders from 18 patients with ac joint instabilities were examined using modified Alexander views and a standardized sonographic examination. Read More

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Characterization of Shear Horizontal Waves Using a 1D Laser Doppler Vibrometer.

Sensors (Basel) 2021 Apr 2;21(7). Epub 2021 Apr 2.

Department of System Design Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada.

We developed a new technique for the detection of shear horizontal surface acoustic waves (SH-SAW) using a one-dimensional laser-based Doppler vibrometer. It measures the out-of-plane surface deformation at the fingertip of an interdigitated transducer (the boundary of the wave aperture) and uses it to estimate the instantaneous in-plane displacement field given the substrate Poisson ratio. It can also estimate the degree of surface confinement (wave decay rate). Read More

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Information Processing and Technical Knowledge Contribute to Self-Controlled Video Feedback for Children Learning the Snatch Movement in Weightlifting.

Percept Mot Skills 2021 Aug 28;128(4):1785-1805. Epub 2021 Apr 28.

Physical Activity, Sport and Health, Research Unit, UR18JS01, National Observatory of Sport, Tunis, Tunisia.

Our aim in this study was to examine, via technical performance analysis and speed of execution, whether information processing and technical knowledge help explain learning benefits of self-controlled video feedback in children's weightlifting performance. We randomized 24 children (aged 10 to 12 years) into self-controlled (SC) and yoked (YK) feedback groups. Learners underwent test sessions one week before (pre-test) and one day after (post-test) six weightlifting training sessions. Read More

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Changes in flight paths of large-bodied birds after construction of large terrestrial wind turbines.

J Environ Manage 2021 Jul 23;290:112647. Epub 2021 Apr 23.

Department of Bioscience, Aarhus University, Kalø, Grenåvej 14, DK-8410, Rønde, Denmark. Electronic address:

The proliferation of ever-larger wind turbines poses risks to wildlife, especially from avian collision, yet avoidance behaviour of large-bodied, long-lived bird species in relation to wind turbines remains little studied away from collision "black spots" and offshore marine environments. Here, three-dimensional flight trajectory data are reported from a laser range-finder study of local movements of large-bodied birds (e.g. Read More

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Anatomical versus non-anatomical configuration of double coraco-clavicular tunnel technique in acromioclavicular joint reconstruction.

Arch Orthop Trauma Surg 2021 Apr 21. Epub 2021 Apr 21.

Department of Orthopedic, Trauma and Plastic Surgery, University of Leipzig, Liebigstraße 20, 04103, Leipzig, Germany.

Purpose: Horizontal instability is a common problem after acromioclavicular joint injuries. The aim of this study was to evaluate if there is a difference regarding horizontal stability between an anatomical and a non-anatomical configuration of the double tunnel coraco-clavicular ligament reconstruction of the acromioclavicular joint.

Methods: Thirteen acromioclavicular joints of human cadaveric shoulders in ethanol-glycerin fixation were included in the study and underwent cyclic anterior and posterior translational testing at a load of 70 N using an electromechanical uniaxial testing machine. Read More

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Antibiotic Resistance Crisis: An Update on Antagonistic Interactions between Probiotics and Methicillin-Resistant Staphylococcus aureus (MRSA).

Curr Microbiol 2021 Jun 21;78(6):2194-2211. Epub 2021 Apr 21.

Molecular Biology Unit, Dairy Microbiology Division, ICAR-National Dairy Research Institute, Karnal-132001, Haryana, India.

Antimicrobial resistance (AMR) havoc is a global multifaceted crisis endowing a significant challenge for the successful eradication of devastating pathogens. Methicillin-Resistant Staphylococcus aureus (MRSA) is an enduring superbug involved in causing devastating infections. Although MRSA is a frequent colonizer of human skin, wound, and anterior nares, the intestinal colonization of MRSA has greatly increased the risk of inducing MRSA-associated colitis besides creating a conducive environment for horizontal transfer of resistant genes to commensal microbes. Read More

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