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https://www.readbyqxmd.com/read/27914399/dynamics-and-acoustics-of-a-spherical-bubble-rising-under-gravity-in-an-inviscid-liquid
#1
Giorgio Riccardi, Enrico De Bernardis
The rising motion and the acoustic emission of a pulsating spherical gas/vapour bubble in an isochoric, inviscid liquid are investigated. The motion is driven by the uniform and constant force field due to the gravity. The liquid is assumed at rest at the initial time. Unlike previous work on this subject, the mass of the bubble is not neglected, so that the bubble motion is accurately simulated also in the presence of large volume variations. After developing the relationships between the bubble motion to the liquid flow, a system of two nonlinear ordinary differential equations (ODEs) for the radius and the position of the center of mass of the bubble is written...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27911014/the-effectiveness-of-an-outdoor-adventure-programme-for-young-children-with-autism-spectrum-disorder-a-controlled-study
#2
Ditza A Zachor, Shira Vardi, Shani Baron-Eitan, Inbal Brodai-Meir, Noa Ginossar, Esther Ben-Itzchak
AIM: Outdoor adventure programmes aim to improve interpersonal relationships using adventurous activities. The current study examined the effectiveness of an outdoor adventure programme in children with autism spectrum disorders (ASD). METHOD: The study included 51 participants (40 males, 11 females; age 3y 4mo-7y 4mo) enrolled in ASD special education kindergartens. Only the intervention group (n=30) participated in the outdoor adventure programme for 13 weeks, completing challenging physical activities that required cooperation and communication with peers and instructors...
December 2, 2016: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/27908703/simultaneous-effects-of-coagulation-and-variable-magnetic-field-on-peristaltically-induced-motion-of-jeffrey-nanofluid-containing-gyrotactic-microorganism
#3
M M Bhatti, A Zeeshan, R Ellahi
In this article, simultaneous effects of coagulation (blood clot) and variable magnetic field on peristaltically induced motion of non-Newtonian Jeffrey nanofluid containing gyrotactic microorganism through an annulus have been studied. The effects of an endoscope also taken into consideration in our study as a special case. The governing flow problem is simplified by taking the approximation of long wavelength and creeping flow regime. The resulting highly coupled differential equations are solved analytically with the help of perturbation method and series solution have been presented up to second order approximation...
November 28, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27906391/large-area-growth-of-vertically-aligned-luminescent-mos2-nanosheets
#4
G Deokar, N S Rajput, P Vancsó, F Ravaux, M Jouiad, D Vignaud, F Cecchet, J-F Colomer
Vertically aligned MoS2 nanosheets (NSs) with exposed edges were successfully synthesized over a large area (∼2 cm(2)). The NSs were grown using an ambient pressure chemical vapor deposition technique via rapid sulfurization of sputter deposited thick molybdenum films. Extensive characterization of the grown MoS2 NSs has been carried out using high resolution scanning and transmission electron microscopy (SEM & TEM). A special care was given to the TEM lamella preparation process by means of a focused ion beam to preserve the NS growth direction...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27906365/computation-of-radiation-pressure-force-exerted-on-arbitrary-shaped-homogeneous-particles-by-high-order-bessel-vortex-beams-using-mlfma
#5
Minglin Yang, Yueqian Wu, Kuan Fang Ren, Xinqing Sheng
Due to special characteristics of nondiffraction and self reconstruction, the Bessel beams have attracted wide attention in optical trapping and appear to be a dramatic alternative to Gaussian beams. We present in this paper an efficient approach based on the surface integral equations (SIE) to compute the radiation pressure force (RPF) exerted on arbitrary shaped homogeneous particles by high-order Bessel vortex beam (HOBVB). The incident beam is described by vector expressions perfectly satisfy Maxwell's equations...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27898852/horse-species-symposium-biomechanics-of-the-exercising-horse
#6
Hilary M Clayton
In spite of having large height and body mass, horses are cursorial animals with an extensive gait repertoire and considerable athletic abilities. The limbs have evolved so that the heavy musculature is confined to the proximal limbs while the distal limbs are light in weight with a single functional digit and long, lightweight tendons to move and support the distal joints. These adaptations reduce the moment of inertia and decrease the energy expended to protract and retract the limbs during locomotion. There is a division of labor between the forelimbs, which have a pillar-like construction specialized for weight bearing, and the hind limbs, in which the more angulated joints provide leverage for the generation of propulsion...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27896682/methods-of-power-force-velocity-profiling-during-sprint-running-a-narrative-review
#7
REVIEW
Matt R Cross, Matt Brughelli, Pierre Samozino, Jean-Benoit Morin
The ability of the human body to generate maximal power is linked to a host of performance outcomes and sporting success. Power-force-velocity relationships characterize limits of the neuromuscular system to produce power, and their measurement has been a common topic in research for the past century. Unfortunately, the narrative of the available literature is complex, with development occurring across a variety of methods and technology. This review focuses on the different equipment and methods used to determine mechanical characteristics of maximal exertion human sprinting...
November 28, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27891306/forces-in-initial-archwires-during-leveling-and-aligning-an-in-vitro-study
#8
Rajesh Kumar Reddy, Pavan K Katari, Tarun T Bypureddy, Venkata Naga Sri Harsha Anumolu, Yenugupalli Kartheek, Nemala R V Sairam
AIM: This in-vitro study measured the force deflection behavior of selected initial alignment archwires by conducting three-point bending tests under controlled tests. The study tested three wire designs, namely, co-axial multistranded stainless steel wires, nickel-titanium, and copper-nickel-titanium archwires. MATERIALS AND METHODS: The archwires were ligated to a specially designed metal jig, simulating the arch. A testing machine (Instron) recorded activation and deactivation forces of different deflections at 37°C...
September 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/27890390/world-association-of-sleep-medicine-wasm-2016-standards-for-recording-and-scoring-leg-movements-in-polysomnograms-developed-by-a-joint-task-force-from-the-international-and-the-european-restless-legs-syndrome-study-groups-irlssg-and-eurlssg
#9
R Ferri, S Fulda, R P Allen, M Zucconi, O Bruni, S Chokroverty, L Ferini-Strambi, B Frauscher, D Garcia-Borreguero, M Hirshkowitz, B Högl, Y Inoue, A Jahangir, M Manconi, C L Marcus, D L Picchietti, G Plazzi, J W Winkelman, R S Zak
This report presents the results of the work by a joint task force of the International and European Restless Legs Syndrome Study Groups and World Association of Sleep Medicine that revised and updated the current standards for recording and scoring leg movements (LM) in polysomnographic recordings (PSG). First, the background of the decisions made and the explanations of the new rules are reported and then specific standard rules are presented for recording, detecting, scoring and reporting LM activity in PSG...
November 7, 2016: Sleep Medicine
https://www.readbyqxmd.com/read/27889133/-venous-thromboembolism-prevention-in-pregnancy-and-the-postpartum-period-in-primary-and-specialized-care
#10
J L Gallo-Vallejo, M Naveiro-Fuentes, A Puertas-Prieto, F J Gallo-Vallejo
After noting that there are a number of risk factors for venous thromboembolism disease during pregnancy, it emphasizes primary prevention and treatment of this serious condition during pregnancy and the postpartum period are essential to reduce maternal morbidity and mortality. Low molecular-weight heparins are under the anticoagulant of choice in pregnancy. Your prescription may make both the primary care physician, as the hematologist and obstetrician. As for prescribing terms, an application protocol in both primary and specialized, multidisciplinary care, based on the existing literature on the subject is presented, which indicated that the hypercoagulable disorders associated with some of the risk factors, forced to do thromboprophylaxis with low molecular-weight heparins throughout pregnancy and the postpartum period presented...
November 23, 2016: Semergen
https://www.readbyqxmd.com/read/27886109/influence-of-secondary-structure-folding-on-the-mutually-exclusive-folding-process-of-gl5-i27-protein-evidence-from-molecular-dynamics-simulations
#11
Qing Wang, Yan Wang, Guangju Chen
Mutually exclusive folding proteins are a class of multidomain proteins in which the host domain remains folded while the guest domain is unfolded, and both domains achieve exchange of their folding status by a mutual exclusive folding (MEF) process. We carried out conventional and targeted molecular dynamics simulations for the mutually exclusive folding protein of GL5/I27 to address the MEF transition mechanisms. We constructed two starting models and two targeted models, i.e., the starting models GL5/I27-S and GL5/I27-ST in which the first model involves the host domain GL5 and the secondary-structure unfolded guest domain I27-S, while the second model involves the host domain GL5 and the secondary/tertiary-structure extending guest domain I27-ST, and the target models GL5-S/I27 and GL5-ST/I27 in which GL5-S and GL5-ST represent the secondary-structure unfolding and the secondary/tertiary-structure extending, respectively...
November 23, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27885261/curvature-driven-bubbles-or-droplets-on-the-spiral-surface
#12
Shanpeng Li, Jianlin Liu, Jian Hou
Directional motion of droplets or bubbles can often be observed in nature and our daily life, and this phenomenon holds great potential in many engineering areas. The study shows that droplets or bubbles can be driven to migrate perpetually on some special substrates, such as the Archimedean spiral, the logarithmic spiral and a cantilever sheet in large deflection. It is found that a bubble approaches or deviates from the position with highest curvature of the substrate, when it is on the concave or convex side...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27870341/development-structure-and-function-of-the-zygomatic-bones-what-is-new-and-why-do-we-care
#13
Paul C Dechow, Qian Wang
This issue of The Anatomical Record is the first of a two-volume set on the zygoma (also called the cheek bone, the zygomatic bone, the malar, or the jugal, the latter term being used in vertebrates other than mammals). The zygoma is an important component of the craniofacial skeleton, in which the zygoma is a connection between the midfacial and the cranial skeletons; has a functional role as the origin of one of the masticatory muscles, the masseter muscle, and several facial muscles; has been considered as an essential buttress of the facial skeleton for resisting masticatory forces; and has importance for determining phylogenetic relationships...
December 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27864643/robust-representations-of-individual-faces-in-chimpanzees-pan-troglodytes-but-not-monkeys-macaca-mulatta
#14
Jessica Taubert, Kimberly B Weldon, Lisa A Parr
Being able to recognize the faces of our friends and family members no matter where we see them represents a substantial challenge for the visual system because the retinal image of a face can be degraded by both changes in the person (age, expression, pose, hairstyle, etc.) and changes in the viewing conditions (direction and degree of illumination). Yet most of us are able to recognize familiar people effortlessly. A popular theory for how face recognition is achieved has argued that the brain stabilizes facial appearance by building average representations that enhance diagnostic features that reliably vary between people while diluting features that vary between instances of the same person...
November 19, 2016: Animal Cognition
https://www.readbyqxmd.com/read/27863443/gait-assessment-with-solesound-instrumented-footwear-in-spinal-muscular-atrophy
#15
Jacqueline Montes, Damiano Zanotto, Sally Dunaway Young, Rachel Salazar, Darryl C De Vivo, Sunil Agrawal
BACKGROUND: Gait impairment is common in spinal muscular atrophy (SMA) and is described using clinical assessments and instrumented walkways. Continuous over-ground walking has not been studied. METHODS: Nine SMA participants completed the six-minute walk test (6MWT) and 10-meter walk/run wearing instrumented footwear (SoleSound). Data were simultaneously collected using a reference system (GAITRite(TM) ). The root mean square error (RMSE) indicated criterion validity...
November 18, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27863286/perceived-community-environmental-influences-on-eating-behaviors-a-photovoice-analysis
#16
Ana Paula Belon, Laura M Nieuwendyk, Helen Vallianatos, Candace I J Nykiforuk
People's perceptions of local food environments influence their abilities to eat healthily. PhotoVoice participants from four communities in Alberta, Canada took pictures of barriers and opportunities for healthy eating and shared their stories in one-on-one semi-structured interviews. Using a socioecological framework, emergent themes were organized by type and size of environment. Findings show that, while availability and access to food outlets influence healthy eating practices, these factors may be eclipsed by other non-physical environmental considerations, such as food regulations and socio-cultural preferences...
December 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/27863284/landing-from-different-heights-biomechanical-and-neuromuscular-strategies-in-trained-gymnasts-and-untrained-prepubescent-girls
#17
Α Christoforidou, D A Patikas, E Bassa, I Paraschos, S Lazaridis, C Christoforidis, C Kotzamanidis
The purpose of this study was to examine the biomechanics of the lower limb, during landing in female prepubertal gymnasts and prepubertal untrained girls, aged 9-12years. Ten healthy participants were included in each group and performed five landings from 20, 40, and 60cm. Kinematics, ground reaction forces (GRF) and electromyogram (EMG) from the lateral gastrocnemius, tibialis anterior, and vastus lateralis are presented. Gymnasts had higher vertical GRF and shorter braking phase during landing. Compared to untrained girls, gymnasts exhibited for all examined drop heights more knee flexion before and at ground contact, but less knee flexion at maximum knee flexion position...
November 9, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27860036/frailty-is-common-and-strongly-associated-with-dyspnoea-severity-in-fibrotic-interstitial-lung-disease
#18
Kathryn M Milne, Joanne M Kwan, Sabina Guler, Tiffany A Winstone, Angela Le, Nasreen Khalil, Pat G Camp, Pearce G Wilcox, Christopher J Ryerson
BACKGROUND AND OBJECTIVE: Frailty is the age-related accumulation of deficits that decrease the ability to respond to biological stress. Patients with fibrotic interstitial lung disease (ILD) may be frail due to consequences of ILD, age, co-morbidities and adverse effects of pharmacotherapies. The objective of this study was to examine the prevalence and predictors of frailty in fibrotic ILD. METHODS: Fibrotic ILD patients were recruited from a specialized clinic...
November 9, 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/27859105/polyphagy-on-unpredictable-resources-does-not-exclude-host-specialization-insects-feeding-on-mushrooms
#19
Kadri Põldmaa, Ants Kaasik, Toomas Tammaru, Olavi Kurina, Siiri Jürgenstein, Tiit Teder
The degree of ecological specialization plays a crucial role in shaping the structure and functioning of communities. However, comparing specialization within and among groups of organisms is complicated by both methodological issues and conceptual and terminological inconsistencies. Environmental predictability has been considered a key determinant of specialization though empirical evidence is still limited. Fungi and their insect consumers provide a poorly studied but promising system to measure host specialization and test the predictability hypothesis...
October 2016: Ecology
https://www.readbyqxmd.com/read/27855708/metazoan-parasite-communities-support-for-the-biological-invasion-of-barbus-barbus-and-its-hybridization-with-the-endemic-barbus-meridionalis
#20
L Gettová, A Gilles, A Šimková
BACKGROUND: Recently, human intervention enabled the introduction of Barbus barbus from the Rhône River basin into the Barbus meridionalis habitats of the Argens River. After an introduction event, parasite loss and lower infection can be expected in non-native hosts in contrast to native species. Still, native species might be endangered by hybridization with the incomer and the introduction of novel parasite species. In our study, we aimed to examine metazoan parasite communities in Barbus spp...
November 17, 2016: Parasites & Vectors
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