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https://www.readbyqxmd.com/read/28934163/a-parameter-communication-optimization-strategy-for-distributed-machine-learning-in-sensors
#1
Jilin Zhang, Hangdi Tu, Yongjian Ren, Jian Wan, Li Zhou, Mingwei Li, Jue Wang, Lifeng Yu, Chang Zhao, Lei Zhang
In order to utilize the distributed characteristic of sensors, distributed machine learning has become the mainstream approach, but the different computing capability of sensors and network delays greatly influence the accuracy and the convergence rate of the machine learning model. Our paper describes a reasonable parameter communication optimization strategy to balance the training overhead and the communication overhead. We extend the fault tolerance of iterative-convergent machine learning algorithms and propose the Dynamic Finite Fault Tolerance (DFFT)...
September 21, 2017: Sensors
https://www.readbyqxmd.com/read/28934100/differences-in-the-movement-skills-and-physical-qualities-of-elite-senior-academy-rugby-league-players
#2
Matthew R E Ireton, Kevin Till, Dan Weaving, Ben Jones
The aim of the present study was to investigate (a) the differences in the movement skills and physical qualities between academy and senior rugby league players, and (b) the relationships between movement skills and physical qualities. Fifty-five male rugby league players (Senior, n=18; Under 19 n=23; Under 16, n=14) undertook a physical testing battery including anthropometric (stature & body mass), strength (isometric mid-thigh pull; IMTP) and power (countermovement jump; CMJ) qualities, alongside the athletic ability assessment (AAA; comprised of overhead squat, double lunge, single-leg Romanian deadlift, press-up and pull-up exercises)...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28932488/medial-elbow-pain
#3
REVIEW
Raul Barco, Samuel A Antuña
Medial elbow pain is uncommon when compared with lateral elbow pain.Medial epicondylitis is an uncommon diagnosis and can be confused with other sources of pain.Overhead throwers and workers lifting heavy objects are at increased risk of medial elbow pain.Differential diagnosis includes ulnar nerve disorders, cervical radiculopathy, injured ulnar collateral ligament, altered distal triceps anatomy or joint disorders.Children with medial elbow pain have to be assessed for 'Little League elbow' and fractures of the medial epicondyle following a traumatic event...
August 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28931844/calibrated-link-budget-of-a-silicon-photonics-wdm-transceiver-with-soa-and-semiconductor-mode-locked-laser
#4
Alvaro Moscoso-Mártir, Juliana Müller, Elmira Islamova, Florian Merget, Jeremy Witzens
Based on the single channel characterization of a Silicon Photonics (SiP) transceiver with Semiconductor Optical Amplifier (SOA) and semiconductor Mode-Locked Laser (MLL), we evaluate the optical power budget of a corresponding Wavelength Division Multiplexed (WDM) link in which penalties associated to multi-channel operation and the management of polarization diversity are introduced. In particular, channel cross-talk as well as Cross Gain Modulation (XGM) and Four Wave Mixing (FWM) inside the SOA are taken into account...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28930790/photography-in-dermatologic-surgery-selection-of-an-appropriate-lighting-solution-for-a-particular-clinical-application
#5
Brian R Chen, Emily Poon, Murad Alam
BACKGROUND: Lighting is an important component of consistent, high-quality dermatologic photography. There are different types of lighting solutions available. OBJECTIVE: To evaluate currently available lighting equipment and methods suitable for procedural dermatology. MATERIALS AND METHODS: Overhead lighting, built-in camera flashes, external flash units, studio strobes, and light-emitting diode (LED) light panels were evaluated with regard to their utility for dermatologic surgeons...
September 19, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28928644/near-infrared-spectroscopy-based-frontal-lobe-neurofeedback-integrated-in-virtual-reality-modulates-brain-and-behavior-in-highly-impulsive-adults
#6
Justin Hudak, Friederike Blume, Thomas Dresler, Florian B Haeussinger, Tobias J Renner, Andreas J Fallgatter, Caterina Gawrilow, Ann-Christine Ehlis
Based on neurofeedback (NF) training as a neurocognitive treatment in attention-deficit/hyperactivity disorder (ADHD), we designed a randomized, controlled functional near-infrared spectroscopy (fNIRS) NF intervention embedded in an immersive virtual reality classroom in which participants learned to control overhead lighting with their dorsolateral prefrontal brain activation. We tested the efficacy of the intervention on healthy adults displaying high impulsivity as a sub-clinical population sharing common features with ADHD...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28928496/dorsal-scapular-nerve-neuropathy-a-narrative-review-of-the-literature
#7
Brad Muir
OBJECTIVE: The purpose of this paper is to elucidate this little known cause of upper back pain through a narrative review of the literature and to discuss the possible role of the dorsal scapular nerve (DSN) in the etiopathology of other similar diagnoses in this area including cervicogenic dorsalgia (CD), notalgia paresthetica (NP), SICK scapula and a posterolateral arm pain pattern. BACKGROUND: Dorsal scapular nerve (DSN) neuropathy has been a rarely thought of differential diagnosis for mid scapular, upper to mid back and costovertebral pain...
August 2017: Journal of the Canadian Chiropractic Association
https://www.readbyqxmd.com/read/28922132/design-of-secure-and-lightweight-authentication-protocol-for-wearable-devices-environment
#8
Ashok Kumar Das, Mohammad Wazid, Neeraj Kumar, Muhammad Khurram Khan, Kim-Kwang Raymond Choo, YoungHo Park
Wearable devices are used in various applications to collect information including step information, sleeping cycles, workout statistics, and health related information. Due to the nature and richness of the data collected by such devices, it is important to ensure the security of the collected data. This paper presents a new lightweight authentication scheme suitable for wearable device deployment. The scheme allows a user to mutually authenticate his/her wearable device(s) and the mobile terminal (e.g., Android and iOS device) and establish a session key among these devices (worn and carried by the same user) for secure communication between the wearable device and the mobile terminal...
September 18, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28921570/behavioural-responses-of-infective-stage-copepodids-of-the-salmon-louse-lepeophtheirus-salmonis-copepoda-caligidae-to-host-related-sensory-cues
#9
D M Fields, A B Skiftesvik, H I Browman
The salmon louse (Lepeophtheirus salmonis [Krøyer]) is an ectoparasitic copepod that causes disease in farmed Atlantic salmon (Salmo salar) and may play a role in the decline of some wild salmonid populations. Controlling lice infestations is a major cost for the salmon industry; this has stimulated the pursuit of alternative approaches to controlling them. One such approach involves determining, and then disrupting, the sensory cues used by the parasite to find its host. In this context, we examined the behavioural responses of lice copepodids to light flicker-simulating light reflecting from the sides of the salmon host and/or the shadows cast by fish passing overhead-and water-soluble chemicals released from the skin of the salmon...
September 17, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28919494/shoulder-injury-in-water-polo-a-systematic-review-of-incidence-and-intrinsic-risk-factors
#10
REVIEW
Andrea H Miller, Kerrie Evans, Roger Adams, Gordon Waddington, Jeremy Witchalls
OBJECTIVES: Water polo is a popular water-based contact sport that involves swimming, throwing and defending. Cumulatively, these repetitive overhead activities are thought to increase the risk of shoulder injury and, subsequently to affect players' physical conditioning as well as team performance. The purpose of this review was to examine available evidence relating to shoulder injury rates and risk factors for shoulder injury in water polo. DESIGN: Systematic review METHODS: CINAHL, AUSPORT, Pubmed, Pedro and SPORTDiscus databases were searched for original research papers using the predefined terms ("water polo") AND (shoulder OR glenohumeral* OR arm OR "upper limb")...
August 31, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28914923/gigabit-free-space-multi-level-signal-transmission-with-a-mid-infrared-quantum-cascade-laser-operating-at-room-temperature
#11
Xiaodan Pang, Oskars Ozolins, Richard Schatz, Joakim Storck, Aleksejs Udalcovs, Jaime Rodrigo Navarro, Aditya Kakkar, Gregory Maisons, Mathieu Carras, Gunnar Jacobsen, Sergei Popov, Sebastian Lourdudoss
Gigabit free-space transmissions are experimentally demonstrated with a quantum cascaded laser (QCL) emitting at mid-wavelength infrared of 4.65 μm, and a commercial infrared photovoltaic detector. The QCL operating at room temperature is directly modulated using on-off keying and, for the first time, to the best of our knowledge, four- and eight-level pulse amplitude modulations (PAM-4, PAM-8). By applying pre- and post-digital equalizations, we achieve up to 3  Gbit/s line data rate in all three modulation configurations with a bit error rate performance of below the 7% overhead hard decision forward error correction limit of 3...
September 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28910530/an-efficient-implicit-solvation-method-for-full-potential-dft
#12
Markus Sinstein, Christoph Scheurer, Sebastian Matera, Volker Blum, Karsten Reuter, Harald Oberhofer
With the advent of efficient electronic structure methods, effective continuum solvation methods have emerged as a way to, at least partially, include solvent effects into simulations without the need for expensive sampling over solvent degrees of freedom. The multipole moment expansion (MPE) model, while based on ideas initially put forward almost 100 years ago, has recently been updated for the needs of modern electronic structure calculations. Indeed, for an all-electron code relying on localized basis sets and---more importantly---a multipole moment expansion of the electrostatic potential, the MPE method presents a particularly cheap way of solving the macroscopic Poisson equation to determine the electrostatic response of a medium surrounding a solute...
September 14, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28906439/psdaap-provably-secure-data-authenticated-aggregation-protocols-using-identity-based-multi-signature-in-marine-wsns
#13
Lifei Wei, Lei Zhang, Dongmei Huang, Kai Zhang, Liang Dai, Guojian Wu
Data authenticated aggregation is always a significant issue for wireless sensor networks (WSNs). The marine sensors are deployed far away from the security monitoring. Secure data aggregation for marine WSNs has emerged and attracted the interest of researchers and engineers. A multi-signature enables the data aggregation through one signature to authenticate various signers on the acknowledgement of a message, which is quite fit for data authenticated aggregation marine WSNs. However, most of the previous multi-signature schemes rely on the technique of bilinear pairing involving heavy computational overhead or the management of certificates, which cannot be afforded by the marine wireless sensors...
September 14, 2017: Sensors
https://www.readbyqxmd.com/read/28902761/care-of-water-polo-players
#14
Jennifer D Stromberg
Water polo is a team sport that combines swimming with overhead throwing and wrestling. This places water polo players at risk for a unique group of illnesses and injuries. In addition to the medical problems and injuries seen in competitive swimmers, water polo players are at risk for a variety of traumatic injuries, including concussions, eye injuries, tympanic membrane perforation, fractures, dislocations, and lacerations. Repetitive overhead throwing also places these athletes at risk for related injuries, such as shoulder problems, including rotator cuff strain and impingement, and elbow problems, such as ulnar collateral ligament injuries, posteromedial impingement, and osteochondritis dissecans of the radial capitellum...
September 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28900808/aerial-application-of-copper-for-dothistroma-control-in-new-zealand-s-planted-forests-effect-on-stream-environments
#15
Brenda R Baillie, Anthony W Evanson, Diana Unsworth, Sunita Jeram
Limited information is available on the risk to aquatic environments from the aerial application of copper fungicides to treat dothistroma needle blight in managed forests. Cuprous oxide was aerially applied to three catchments of Pinus radiata of varying age classes in the central North Island of New Zealand. Copper was monitored in stream water and sediments prior to and for 1 month after application. Copper deposits collected from tracer plates deployed above the water surface along the stream channels within the treated areas at each site ranged from 13 to 406 ppm...
September 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28899638/subpectoral-biceps-tenodesis-for-treatment-of-isolated-type-ii-slap-lesions-in-a-young-and-active-population
#16
Jonas Pogorzelski, Marilee P Horan, Zaamin B Hussain, Alexander Vap, Erik M Fritz, Peter J Millett
PURPOSE: The purpose of this study was to evaluate outcomes following open subpectoral biceps tenodesis for the treatment of isolated type II SLAP lesions in patients 45 years of age or younger and evaluate the rate of return to sport. METHODS: All patients included in the study were at least 2 years out from open subpectoral biceps tenodesis for treatment of an isolated type II SLAP lesion and were treated between December 2007 and March 2015. All patients older than 45, those who had prior surgery on the index shoulder, and those who had any concomitant reconstructive shoulder procedures were excluded...
September 9, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28893394/biceps-tenotomy-in-the-presence-of-a-supraspinatus-tear-alters-the-adjacent-intact-tendons-and-glenoid-cartilage
#17
Zakary M Beach, Jennica J Tucker, Stephen J Thomas, Katherine E Reuther, Chancellor F Gray, Chang-Soo Lee, David L Glaser, Louis J Soslowsky
A rotator cuff tear is a common injury in athletes and workers who repeatedly perform overhead movements, and it is not uncommon for this demographic to return to activity shortly after treatment. A biceps tenotomy is often performed in the presence of a rotator cuff tear to help reduce pain and improve joint function. However, the effect of this procedure on the surrounding tissues in the glenohumeral joint is unknown. Therefore, the purpose of this study was to investigate the effect of a biceps tenotomy in the presence of a supraspinatus rotator cuff tear followed by overuse activity on ambulatory function and mechanical and histologic properties of the remaining rotator cuff tendons and glenoid cartilage...
August 26, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28888193/children-s-perception-of-action-boundaries-and-how-it-affects-their-climbing-behavior
#18
James L Croft, Gert-Jan Pepping, Chris Button, Jia-Yi Chow
There are some concerns that children today may be less calibrated to their action capabilities because of the "risk-free" culture that has proliferated during recent decades. This study investigated the extent to which judgments of reaching affordances presented in different directions (i.e., overhead, diagonal, and horizontal) are related to children's climbing behavior on a climbing wall. A sample of 30 schoolchildren from 6 to 11years old (20 boys and 10 girls) estimated maximum reach and grasp distances and subsequently attempted to climb across an indoor climbing wall...
September 6, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28885092/infant-discovery-learning-and-lower-extremity-coordination-influence-of-prematurity
#19
Barbara Sargent, Masayoshi Kubo, Linda Fetters
AIMS: Preterm infants at increased risk for neurodevelopmental disabilities, including cerebral palsy, demonstrate reduced selective leg joint coordination. Full-term infants demonstrate more selective hip-knee coordination when specific leg actions are reinforced using an overhead infant mobile. The purpose of this pilot study was to determine the ability of preterm infants to: (1) perform and learn through discovery, the contingency between leg action and mobile activation, and (2) demonstrate more selective hip-knee coordination when leg actions are reinforced with mobile activation...
September 8, 2017: Physical & Occupational Therapy in Pediatrics
https://www.readbyqxmd.com/read/28880160/pvr-patch-to-volume-reconstruction-for-large-area-motion-correction-of-fetal-mri
#20
Amir Alansary, Martin Rajchl, Steven G McDonagh, Maria Murgasova, Mellisa Damodaram, David F A Lloyd, Alice Davidson, Mary Rutherford, Joseph V Hajnal, Daniel Rueckert, Bernhard Kainz
In this paper we present a novel method for the correction of motion artifacts that are present in fetal Magnetic Resonance Imaging (MRI) scans of the whole uterus. Contrary to current slice-to-volume registration (SVR) methods, requiring an inflexible anatomical enclosure of a single investigated organ, the proposed patch-to-volume reconstruction (PVR) approach is able to reconstruct a large field of view of non-rigidly deforming structures. It relaxes rigid motion assumptions by introducing a specific amount of redundant information that is exploited with parallelized patch-wise optimization, super-resolution, and automatic outlier rejection...
September 1, 2017: IEEE Transactions on Medical Imaging
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