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https://www.readbyqxmd.com/read/28212348/an-electromagnetic-sensor-for-the-autonomous-running-of-visually-impaired-and-blind-athletes-part-ii-the-wearable-device
#1
Marco Pieralisi, Valentina Di Mattia, Valerio Petrini, Alfredo De Leo, Giovanni Manfredi, Paola Russo, Lorenzo Scalise, Graziano Cerri
Currently, the availability of technology developed to increase the autonomy of visually impaired athletes during sports is limited. The research proposed in this paper (Part I and Part II) focuses on the realization of an electromagnetic system that can guide a blind runner along a race track without the need for a sighted guide. In general, the system is composed of a transmitting unit (widely described in Part I) and a receiving unit, whose components and main features are described in this paper. Special attention is paid to the definition of an electromagnetic model able to faithfully represent the physical mechanisms of interaction between the two units, as well as between the receiving magnetic sensor and the body of the user wearing the device...
February 16, 2017: Sensors
https://www.readbyqxmd.com/read/28212118/role-of-chronic-exercise-on-pelvic-floor-support-and-function
#2
Janet M Shaw, Ingrid E Nygaard
PURPOSE OF REVIEW: To summarize recent literature about the potential role of chronic exercise on pelvic floor support and function. RECENT FINDINGS: Stress urinary incontinence is common during physical activity. Scant evidence suggests a dose-response association between higher volumes of exercise and urinary incontinence. Athletes do not appear to have greater pelvic floor muscle strength or worse pelvic floor support compared to nonathletes. Pelvic floor muscle electromyographic activity increases substantially as running speeds increase...
February 16, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28212094/characteristics-of-myosin-v-processivity
#3
Jun-Ping Zhang, Yi Liu, Wei Sun, Xiaoyang Zhao, Ta La, Wei-Sheng Guo
Myosin V is a processive doubled-headed biomolecular motor involved in many intracellular organelle and vesicle transport. The unidirectional movement is coupled with the adenosine triphosphate (ATP) hydrolysis and product release cycle. With the progress of experimental techniques and the enhancement of measuring directness, detailed knowledge of the motility of myosin V has been obtained.Following the ATPase cycle, the 4-state mechanochemical model of the myosin V's processive movement is used. The transitions between various states take place in a stochastic manner...
February 14, 2017: IEEE/ACM Transactions on Computational Biology and Bioinformatics
https://www.readbyqxmd.com/read/28212075/towards-photoplethysmography-based-estimation-of-instantaneous-heart-rate-during-physical-activity
#4
Delaram Jarchi, Alex Casson
OBJECTIVE: Recently numerous methods have been proposed for estimating average heart rate using photoplethysmography (PPG) during physical activity, overcoming the significant interference that motion causes in PPG traces. We propose a new algorithm framework for extracting instantaneous heart rate from wearable PPG and ECG signals to provide an estimate of heart rate variability during exercise. METHODS: For ECG signals we propose a new spectral masking approach which modifies a particle filter tracking algorithm, and for PPG signals constrains the instantaneous frequency obtained from the Hilbert transform to a region of interest around a candidate heart rate measure...
February 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28211509/climbing-favours-the-tripod-gait-over-alternative-faster-insect-gaits
#5
Pavan Ramdya, Robin Thandiackal, Raphael Cherney, Thibault Asselborn, Richard Benton, Auke Jan Ijspeert, Dario Floreano
To escape danger or catch prey, running vertebrates rely on dynamic gaits with minimal ground contact. By contrast, most insects use a tripod gait that maintains at least three legs on the ground at any given time. One prevailing hypothesis for this difference in fast locomotor strategies is that tripod locomotion allows insects to rapidly navigate three-dimensional terrain. To test this, we computationally discovered fast locomotor gaits for a model based on Drosophila melanogaster. Indeed, the tripod gait emerges to the exclusion of many other possible gaits when optimizing fast upward climbing with leg adhesion...
February 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28211489/sleep-supports-the-slow-abstraction-of-gist-from-visual-perceptual-memories
#6
Nicolas D Lutz, Susanne Diekelmann, Patricia Hinse-Stern, Jan Born, Karsten Rauss
Sleep benefits the consolidation of individual episodic memories. In the long run, however, it may be more efficient to retain the abstract gist of single, related memories, which can be generalized to similar instances in the future. While episodic memory is enhanced after one night of sleep, effective gist abstraction is thought to require multiple nights. We tested this hypothesis using a visual Deese-Roediger-McDermott paradigm, examining gist abstraction and episodic-like memory consolidation after 20 min, after 10 hours, as well as after one year of retention...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211199/description-and-molecular-phylogeny-of-a-novel-hypotrich-ciliate-from-the-soil-of-marche-region-italy-including-notes-on-the-mosyss-project
#7
Daizy Bharti, Santosh Kumar, Antonietta La Terza
The morphology and morphogenesis during cell division of a new stylonychine hypotrich, Rigidocortex quadrinucleatus n. sp., were investigated using live observation and protargol staining. The new species was isolated from soil samples collected from an organic farm in the Marche Region, Italy, in framework of the MOSYSS project. Rigidocortex quadrinucleatus is characterized as follows: cell size about 180 × 80 μm in vivo; four ellipsoidal macronuclear nodules; 44 adoral membranelles: 18 frontal-ventral-transverse cirri consisting of three frontal, four frontoventral, one buccal, three ventral, two pretransverse and five transverse cirri; dorsal kinety 3 with multiple fragmentation; resting cyst with hyaline ridges...
February 17, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28211003/an-easy-to-build-low-budget-point-of-care-ultrasound-simulator-from-linux-to-a-web-based-solution
#8
Domagoj Damjanovic, Ulrich Goebel, Benedikt Fischer, Martin Huth, Hartmut Breger, Hartmut Buerkle, Axel Schmutz
BACKGROUND: Hands-on training in point-of-care ultrasound (POC-US) should ideally comprise bedside teaching, as well as simulated clinical scenarios. High-fidelity phantoms and portable ultrasound simulation systems are commercially available, however, at considerable costs. This limits their suitability for medical schools. A Linux-based software for Emergency Department Ultrasound Simulation (edus2TM) was developed by Kulyk and Olszynski in 2011. Its feasibility for POC-US education has been well-documented, and shows good acceptance...
December 2017: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/28210957/forced-treadmill-exercise-prevents-spatial-memory-deficits-in-aged-rats-probably-through-the-activation-of-na-k-atpase-in-the-hippocampus
#9
Cláudia Vanzella, Eduardo Farias Sanches, Felipe Kawa Odorcyk, Fabrício Nicola, Janaína Kolling, Aline Longoni, Tiago Marcon Dos Santos, Angela Terezinha de Souza Wyse, Carlos Alexandre Netto
Regular physical activity has shown to improve the quality of life and to prevent age-related memory deficits. Memory processing requires proper regulation of several enzymes such as sodium-potassium adenosine triphosphatase (Na(+), K(+)-ATPase) and acetylcholinesterase (AChE), which have a pivotal role in neuronal transmission. The present study investigated the effects of a treadmill running protocol in young (3 months), mature (6 months) and aged (22 months) Wistar rats, on: (a) cognitive function, as assessed in the Water maze spatial tasks; (b) Na(+), K(+)-ATPase and AChE activities in the hippocampus following cognitive training alone or treadmill running combined with cognitive training...
February 16, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28210879/theoretical-study-of-the-spectroscopic-and-nonlinear-optical-properties-of-trans-and-cis-4-hydroxyazobenzene
#10
Hai-Peng Li, Ze-Tong Bi, Wen-Yue Fu, Run-Feng Xu, Yi Zhang, Xiao-Peng Shen, Ming-Xue Li, Gang Tang, Kui Han
We investigate the molecular structure, vibrational and electronic absorption spectra, and electronic hyperpolarizabilities of trans and cis isomers of 4-hydroxyazobenzene (HOAB) via density functional theory. Results show that the azo dye exhibits a high third-order nonlinear optical response and good optical transparency. Both the basis set and the functional are important influences on the results obtained when calculating the absorption spectrum and NLO response. We also study the effect of the solvent on the electronic absorption spectrum to assess the ability of the functional to reproduce the experimental spectrum in combination with a suitable solvent model...
March 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28210643/perception-of-health-problems-among-competitive-runners-a-qualitative-study-of-cognitive-appraisals-and-behavioral-responses
#11
Sara Jelvegård, Toomas Timpka, Victor Bargoria, Håkan Gauffin, Jenny Jacobsson
BACKGROUND: Approximately 2 of every 3 competitive runners sustain at least 1 health problem each season. Most of these problems are nontraumatic injuries with gradual onset. The main known risk indicator for sustaining a new running-related injury episode is a history of a previous injury, suggesting that behavioral habits are part of the causal mechanisms. PURPOSE: Identification of elements associated with purposeful interpretations of body perceptions and balanced behavioral responses may supply vital information for prevention of health problems in runners...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28210308/my-night-on-call-in-spain
#12
Iñigo Ojanguren
The day starts at 8:00 h with a clinical session in the Respiratory Service of the Vall d'Hebron University Hospital, in Barcelona, Spain; from 8:00 to 9:00 h, a colleague discusses and explains to the rest of the department the most important articles published in the past month in his assigned respiratory journal. I run out at 8:55 h as I am about to start a respiratory outpatient clinic, where I will see 24 patients over the next few hours. Hopefully I'll have a break at 15:00 h so that I have the opportunity to have lunch and recover my energy to immerse myself in the evening-night shift...
September 2016: Breathe
https://www.readbyqxmd.com/read/28210013/the-relation-between-depressive-symptoms-and-self-care-in-patients-with-diabetes-mellitus-type-2-in-kosovo
#13
Idriz Sopjani, Shemsedin Vehapi, Daut Gorani, Miradije Imeri, Sidita Vitoja, Shqipe Tahiri
BACKGROUND: The depression is a significant problem in patients with diabetes. This research is the first of it's kind conducted in the Republic of Kosovo to determine the prevalence of depression diagnosed in people with diabetes mellitus type 2 (DMT2) and interrelation between depressive symptoms and behavior of diabetes self-care (glucose monitoring, exercise, diet, and self- health care). METHODS: Research was conducted in the University Clinical Center of Kosovo (UCCK), in Pristine...
December 2016: Medical Archives
https://www.readbyqxmd.com/read/28209135/marv-a-tool-for-genome-wide-multi-phenotype-analysis-of-rare-variants
#14
Marika Kaakinen, Reedik Mägi, Krista Fischer, Jani Heikkinen, Marjo-Riitta Järvelin, Andrew P Morris, Inga Prokopenko
BACKGROUND: Genome-wide association studies have enabled identification of thousands of loci for hundreds of traits. Yet, for most human traits a substantial part of the estimated heritability is unexplained. This and recent advances in technology to produce high-dimensional data cost-effectively have led to method development beyond standard common variant analysis, including single-phenotype rare variant and multi-phenotype common variant analysis, with the latter increasing power for locus discovery and providing suggestions of pleiotropic effects...
February 16, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28208690/examining-the-relationship-between-economic-hardship-and-child-maltreatment-using-data-from-the-ontario-incidence-study-of-reported-child-abuse-and-neglect-2013-ois-2013
#15
Rachael Lefebvre, Barbara Fallon, Melissa Van Wert, Joanne Filippelli
There is strong evidence that poverty and economic disadvantage are associated with child maltreatment; however, research in this area is underdeveloped in Canada. The purpose of this paper is to examine the relationship between economic hardship and maltreatment for families and children identified to the Ontario child protection system for a maltreatment concern. Secondary analyses of the Ontario Incidence Study of Reported Child Abuse and Neglect-2013 (OIS-2013) were conducted. The OIS-2013 examines the incidence of reported maltreatment and the characteristics of children and families investigated by child welfare authorities in Ontario in 2013...
February 8, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28208593/context-sensing-system-analysis-for-privacy-preservation-based-on-game-theory
#16
Shengling Wang, Luyun Li, Weiman Sun, Junqi Guo, Rongfang Bie, Kai Lin
In a context sensing system in which a sensor-equipped mobile phone runs an unreliable context-aware application, the application can infer the user's contexts, based on which it provides personalized services. However, the application may sell the user's contexts to some malicious adversaries to earn extra profits, which will hinder its widespread use. In the real world, the actions of the user, the application and the adversary in the context sensing system affect each other, so that their payoffs are constrained mutually...
February 10, 2017: Sensors
https://www.readbyqxmd.com/read/28208499/collective-transport-for-active-matter-run-and-tumble-disk-systems-on-a-traveling-wave-substrate
#17
Cs Sándor, A Libál, C Reichhardt, C J Olson Reichhardt
We examine numerically the transport of an assembly of active run-and-tumble disks interacting with a traveling-wave substrate. We show that as a function of substrate strength, wave speed, disk activity, and disk density, a variety of dynamical phases arise that are correlated with the structure and net flux of disks. We find that there is a sharp transition into a state in which the disks are only partially coupled to the substrate and form a phase-separated cluster state. This transition is associated with a drop in the net disk flux, and it can occur as a function of the substrate speed, maximum substrate force, disk run time, and disk density...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208318/microfield-dynamics-in-dense-hydrogen-plasmas-with-high-z-impurities
#18
Stefan P Hau-Riege, Jon Weisheit
We use large-scale classical molecular dynamics to determine microfield properties for several dense plasma mixtures. By employing quantum statistical potentials (QSPs) to regularize the Coulomb interaction, our simulations follow motions of electrons as well as ions for times long enough to track relaxation phenomena involving both types of particles. Coulomb coupling, relative to temperature, of different pairs of species in the hot, dense matter being simulated ranges from weak to strong. We first study the effect of such coupling differences, along with composition and QSP differences, on the roles of electrons and various mixture components in determining probability distributions of instantaneous, total microfields experienced by the ions...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208299/open-source-based-3d-printing-of-thin-silica-gel-layers-in-planar-chromatography
#19
Dimitri Fichou, Gertrud E Morlock
On the basis of open-source packages, 3D printing of thin silica gel layers is demonstrated as proof-of-principle for use in planar chromatography. A slurry doser was designed to replace the plastic extruder of an open-source Prusa i3 printer. The optimal parameters for 3D printing of layers were studied, and the planar chromatographic separations on these printed layers were successfully demonstrated with a mixture of dyes. The layer printing process was fast. For printing a 0.2 mm layer on a 10 cm × 10 cm format, it took less than 5 min...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28208286/derivatization-technique-to-identify-specifically-carbonyl-groups-by-infrared-spectroscopy-characterization-of-photooxidative-aging-products-in-terpenes-and-terpeneous-resins
#20
Stefan Zumbühl, Andreas Brändle, Andreas Hochuli, Nadim C Scherrer, Walter Caseri
Analysis of bioorganic materials by infrared spectroscopy (FT-IR) is frequently limited due to overlapping of diagnostic bands from the various components, which poses a fundamental problem to this analytical technique. The distinction of oxidized di- and triterpenes, for example, is hindered by the superposition of similar absorption bands of carbonyl functional groups summing up to a broad, nondistinctive signal. This study presents a technique for selective fluorination of various carboxylic acids by exposure to gaseous sulfur tetrafluoride...
February 7, 2017: Analytical Chemistry
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