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https://www.readbyqxmd.com/read/28100804/role-of-the-different-eyes-in-the-visual-odometry-in-the-wolf-spider-lycosa-tarantula-araneae-lycosidae
#1
Joaquin Ortega-Escobar, Miguel A Ruiz
The wolf spider Lycosa tarantula returns home by means of path integration. Previous studies demonstrated: (i) that the angular component of the outbound run is measured using a polarized-light compass associated with the anterior median eyes; (ii) changes in direction of the substratum are detected by the anterior lateral eyes (ALEs); and (iii) in relation to the linear component of the outbound run, an increase of optic flow, in either the lateral or ventral fields of view, caused spiders to search for the burrow at a point nearer to the goal...
January 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28095070/player-responses-to-match-and-training-demands-during-an-intensified-fixture-schedule-in-professional-rugby-league-a-case-study
#2
Craig Twist, Jamie Highton, Matthew Daniels, Nathan Mill, Graeme Close
Player loads and fatigue responses were reported in 15 professional rugby league players (24.3 ± 3.8 y) during a period of intensified fixtures. Repeated measures of internal and external loads, perceived wellbeing and jump flight time were recorded across 22 days, comprising nine training sessions and matches on days 5, 12, 15 and 21 (player exposure: 3.6 ± 0.6 matches). Mean training load (session RPE x duration) between matches was 1177, 1083, 103, and 650 AU, respectively. Relative distance in Match 1 (82 m/min) and Match 4 (79 m/min) was very likely lower in Match 2 (76 m/min) and likely higher in Match 3 (86 m/min)...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095067/pacing-strategies-and-metabolic-responses-during-4-minute-running-time-trials
#3
Jonathan Watkins, Simon Platt, Erik Andersson, Kerry McGawley
PURPOSE: The aim of the current study was to investigate pacing strategies and the distribution of physiological resources in best versus worst performances during a series of 4-minute, self-paced running time-trials (RunTTs). METHODS: Five male and five female recreational runners (age 32 ± 7 years) completed a sub-maximal ramp test and five RunTTs on a motor-driven treadmill fitted with a speed-controlling laser system. The supramaximal V̇O2 demand was estimated by linear extrapolation from the sub-maximal relationship between V̇O2 and speed, enabling computation of the accumulated oxygen deficit (AOD)...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28094013/pulmonary-outcome-of-esophageal-atresia-patients-and-its-potential-causes-in-early-childhood
#4
René Dittrich, Philippe Stock, Karin Rothe, Petra Degenhardt
INTRODUCTION: The aim of this study was to illustrate the pulmonary long term outcome of patients with repaired esophageal atresia and to further examine causes and correlations that might have led to this outcome. METHODS: Twenty-seven of 62 possible patients (43%) aged 5-20years, with repaired esophageal atresia were recruited. Body plethysmography and spirometry were performed to evaluate lung function, and the Bruce protocol treadmill exercise test to assess physical fitness...
January 3, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28092208/the-effects-of-mental-fatigue-on-cricket-relevant-performance-among-elite-players
#5
Daren Veness, Stephen David Patterson, Owen Jeffries, Mark Waldron
This study investigated the effects of a mentally fatiguing test on physical tasks among elite cricketers. In a cross-over design, 10 elite male cricket players from a professional club performed a cricket run-two test, a Batak Lite reaction time test and a Yo-Yo-Intermittent Recovery Level 1 (Yo-Yo-IR1) test, providing a rating of perceived exertion (RPE) after completing a 30-min Stroop test (mental fatigue condition) or 30-min control condition. Perceived fatigue was assessed before and after the two conditions and motivation was measured before testing...
January 16, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28087535/efficient-low-ph-iron-removal-by-a-microbial-iron-oxide-mound-ecosystem-at-scalp-level-run
#6
Christen L Grettenberger, Alexandra R Pearce, Kyle J Bibby, Daniel S Jones, William D Burgos, Jennifer L Macalady
: Acid mine drainage (AMD) is a major environmental problem affecting tens of thousands of km of waterways worldwide. Passive bioremediation of AMD relies on microbial communities to oxidize and remove iron from the system; however, iron-oxidation rates in AMD environments are highly variable across sites. At Scalp Level Run (Cambria County PA), first-order iron-oxidation rates are ten times faster than at other coal associated iron mounds in the Appalachians. We examined the bacterial community at Scalp Level Run to determine whether a unique community is responsible for the rapid iron oxidation rate...
January 13, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28079879/the-cluspro-web-server-for-protein-protein-docking
#7
Dima Kozakov, David R Hall, Bing Xia, Kathryn A Porter, Dzmitry Padhorny, Christine Yueh, Dmitri Beglov, Sandor Vajda
The ClusPro server (https://cluspro.org) is a widely used tool for protein-protein docking. The server provides a simple home page for basic use, requiring only two files in Protein Data Bank (PDB) format. However, ClusPro also offers a number of advanced options to modify the search; these include the removal of unstructured protein regions, application of attraction or repulsion, accounting for pairwise distance restraints, construction of homo-multimers, consideration of small-angle X-ray scattering (SAXS) data, and location of heparin-binding sites...
February 2017: Nature Protocols
https://www.readbyqxmd.com/read/28077191/genome-wide-analysis-in-endangered-populations-a-case-study-in-barbaresca-sheep
#8
S Mastrangelo, B Portolano, R Di Gerlando, R Ciampolini, M Tolone, M T Sardina
Analysis of genomic data is becoming increasingly common in the livestock industry and the findings have been an invaluable resource for effective management of breeding programs in small and endangered populations. In this paper, with the goal of highlighting the potential of genomic analysis for small and endangered populations, genome-wide levels of linkage disequilibrium, measured as the squared correlation coefficient of allele frequencies at a pair of loci, effective population size, runs of homozygosity (ROH) and genetic diversity parameters, were estimated in Barbaresca sheep using Illumina OvineSNP50K array data...
January 12, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28075375/an-approach-to-biometric-verification-based-on-human-body-communication-in-wearable-devices
#9
Jingzhen Li, Yuhang Liu, Zedong Nie, Wenjian Qin, Zengyao Pang, Lei Wang
In this paper, an approach to biometric verification based on human body communication (HBC) is presented for wearable devices. For this purpose, the transmission gain S21 of volunteer's forearm is measured by vector network analyzer (VNA). Specifically, in order to determine the chosen frequency for biometric verification, 1800 groups of data are acquired from 10 volunteers in the frequency range 0.3 MHz to 1500 MHz, and each group includes 1601 sample data. In addition, to achieve the rapid verification, 30 groups of data for each volunteer are acquired at the chosen frequency, and each group contains only 21 sample data...
January 10, 2017: Sensors
https://www.readbyqxmd.com/read/28073754/fast-and-accurate-phylogeny-reconstruction-using-filtered-spaced-word-matches
#10
Chris-André Leimeister, Salma Sohrabi-Jahromi, Burkhard Morgenstern
MOTIVATION: Word-based or 'alignment-free' algorithms are increasingly used for phylogeny reconstruction and genome comparison, since they are much faster than traditional approaches that are based on full sequence alignments. Existing alignment-free programs, however, are less accurate than alignment-based methods. RESULTS: We propose Filtered Spaced Word Matches (FSWM), a fast alignment-free approach to estimate phylogenetic distances between large genomic sequences...
January 10, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28067762/ecologically-valid-carbohydrate-intake-during-soccer-specific-exercise-does-not-affect-running-performance-in-a-fed-state
#11
Mark P Funnell, Nick R Dykes, Elliot J Owen, Stephen A Mears, Ian Rollo, Lewis J James
This study assessed the effect of carbohydrate intake on self-selected soccer-specific running performance. Sixteen male soccer players (age 23 ± 4 years; body mass 76.9 ± 7.2 kg; predicted VO2max = 54.2 ± 2.9 mL∙kg(-1)∙min(-1); soccer experience 13 ± 4 years) completed a progressive multistage fitness test, familiarisation trial and two experimental trials, involving a modified version of the Loughborough Intermittent Shuttle Test (LIST) to simulate a soccer match in a fed state. Subjects completed six 15 min blocks (two halves of 45 min) of intermittent shuttle running, with a 15-min half-time...
January 5, 2017: Nutrients
https://www.readbyqxmd.com/read/28064026/systematic-review-of-field-based-physical-fitness-tests-for-children-and-adolescents-with-intellectual-disabilities
#12
REVIEW
Marieke Wouters, Heleen M Evenhuis, Thessa I M Hilgenkamp
BACKGROUND: Testing physical fitness in children and adolescents with intellectual disabilities (ID) can be challenging. This review provides an overview on psychometric properties of field-based physical fitness tests studied in children and adolescents with ID. METHODS: A literature search was performed in March 2014. Studies were included if they evaluated feasibility, reliability and/or validity of a field-based physical fitness test in children and adolescents with ID...
January 5, 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/28061379/assessment-of-the-non-gaussianity-and-non-linearity-levels-of-simulated-semg-signals-on-stationary-segments
#13
Noureddine Messaoudi, Raïs El'hadi Bekka, Philippe Ravier, Rachid Harba
The purpose of this paper was to evaluate the effects of the longitudinal single differential (LSD), the longitudinal double differential (LDD) and the normal double differential (NDD) spatial filters, the electrode shape, the inter-electrode distance (IED) on non-Gaussianity and non-linearity levels of simulated surface EMG (sEMG) signals when the maximum voluntary contraction (MVC) varied from 10% to 100% by a step of 10%. The effects of recruitment range thresholds (RR), the firing rate (FR) strategy and the peak firing rate (PFR) of motor units were also considered...
December 25, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28056179/descriptive-characteristics-of-concussions-in-national-football-league-games-2010-2011-to-2013-2014
#14
Michael D Clark, Breton M Asken, Stephen W Marshall, Kevin M Guskiewicz
BACKGROUND: Despite a high reported incidence rate of concussion, little is known about the on-field characteristics of injurious head impacts in National Football League (NFL) games. PURPOSE: To characterize on-field features (location, player position, and time during game) and biomechanical features (anticipation status, closing distance, impact location and type) associated with concussions in NFL games over a 4-season period (2010-2011 to 2013-2014). STUDY DESIGN: Descriptive epidemiology study...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28054492/match-running-performance-and-skill-execution-improves-with-age-but-not-the-number-of-disposals-in-young-australian-footballers
#15
Paul B Gastin, Christie Tangalos, Lorena Torres, Sam Robertson
This study investigated age-related differences in maturity, physical and functional characteristics and playing performance in youth Australian Football (AF). Young male players (n = 156) were recruited from 12 teams across 6 age groups (U10-U15) of a recreational AF club. All players were tested for body size, maturity and fitness. Player performance was assessed during a match in which disposals (kicks and handballs) and their effectiveness were coded from a video recording and match running performance measured using Global Positioning System...
January 5, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28047739/su-d-207b-07-development-of-a-ct-radiomics-based-early-response-prediction-model-during-delivery-of-chemoradiation-therapy-for-pancreatic-cancer
#16
S Klawikowski, J Christian, D Schott, M Zhang, X Li
PURPOSE: Pilot study developing a CT-texture based model for early assessment of treatment response during the delivery of chemoradiation therapy (CRT) for pancreatic cancer. METHODS: Daily CT data acquired for 24 pancreatic head cancer patients using CT-on-rails, during the routine CT-guided CRT delivery with a radiation dose of 50.4 Gy in 28 fractions, were analyzed. The pancreas head was contoured on each daily CT. Texture analysis was performed within the pancreas head contour using a research tool (IBEX)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047458/mo-ab-bra-08-a-modular-multi-source-x-ray-tube-for-novel-computed-tomography-applications
#17
B Walker, J Radtke, G Petry, R Swader, G Chen, K Eliceiri, T Mackie
PURPOSE: To develop and build a practical implementation of an x-ray line source for the rapidly increasing number of multi-source imaging applications in CT. METHODS: An innovative x-ray tube was designed using CST Particle Studio, ANSYS, and SolidWorks. A slowly varying magnetic field is synchronized with microsecond gating of multiple thermionic electron sources. Electrostatic simulations were run to optimize the geometry of the optics and prevent electrode arcing...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046926/su-f-t-658-out-of-field-dose-comparison-for-truebeam-low-energy-beams-for-extended-distances-measurement-vs-monte-carlo-simulation
#18
K Wijesooriya, N Liyanage, M Kaluarachchi, D Sawkey
PURPOSE: Patient dose far from the treatment field is comprised of scatter from within the patient, and treatment head leakage. We quantify the treatment head leakage for TrueBeam linear accelerator for 6X and 6X-FFF beams by comparing measurements to Monte Carlo simulations for a variety of jaw sizes and collimator rotations. This work is conceptually similar to that of Kry et al. (Medical Physics 2006; 33: 4405), who considered a Clinac linear accelerator. METHODS: Measurements were made using an EXRADIN A101 ion chamber positioned in the patient plane, at distances up to 100 cm from isocenter...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046601/su-f-t-232-monthly-quality-assurance-in-external-beam-radiation-therapy-using-a-single-system
#19
K Ding, T Ji, I Iordachita, E Velarde, J Hyatt, J Wong
PURPOSE: Monthly quality assurance (QA) is time consuming for external beam radiation therapy, taking as long as 6-8 hours for each machine. It is due to the use and setup of multiple devices for different QA procedures. We have developed a single system with rotational capability for the measurement of both optical light and radiation which significantly reduces the time spent on Monthly QA. METHODS: A single system using mirrors, a phosphor screen and a CCD camera is housed on a cylindrical motor so that it can rotate 360 degrees...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046551/we-ab-bra-09-registration-of-preoperative-mri-to-intraoperative-radiographs-for-automatic-vertebral-target-localization
#20
T De Silva, A Uneri, M Ketcha, S Reaungamornrat, J Goerres, S Vogt, G Kleinszig, J Wolinsky, J H Siewerdsen
PURPOSE: Accurate localization of target vertebrae is essential to safe, effective spine surgery, but wrong-level surgery occurs with surprisingly high frequency. Recent research yielded the "LevelCheck" method for 3D-2D registration of preoperative CT to intraoperative radiographs, providing decision support for level localization. We report a new method (MR-LevelCheck) to perform 3D-2D registration based on preoperative MRI, presenting a solution for the increasingly common scenario in which MRI (not CT) is used for preoperative planning...
June 2016: Medical Physics
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