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Global position system

Michael J Widener, Leia M Minaker, Jessica L Reid, Zachary Patterson, Tara Kamal Ahmadi, David Hammond
OBJECTIVE: To examine the potential links between activity spaces, the food retail environment and food shopping behaviours for the population of young, urban adults. DESIGN: Participants took part in the Canada Food Study, which collected information on demographics, food behaviour, diet and health, as well as an additional smartphone study that included a seven-day period of logging GPS (global positioning system) location and food purchases. Using a time-weighted, continuous representation of participant activity spaces generated from GPS trajectory data, the locations of food purchases and a geocoded food retail data set, negative binomial regression models were used to explore what types of food retailers participants were exposed to and where food purchases were made...
March 16, 2018: Public Health Nutrition
Youngin Choi, Jungsuk Roh
[Purpose] The present study aimed to analyze and compare the activity profile and physiological responses of amateur football referees during competitive matches of high school and college students. [Subjects and Methods] Thirty referees (high school, 15; college, 15) were included in this study. The total distance covered, movement speed, and heart rate were measured using a global positioning system-enabled wireless heart rate monitor. The blood lactate concentration was measured immediately after the first and second half...
February 2018: Journal of Physical Therapy Science
Sara Sigismund, Giorgio Scita
An explosive growth in knowledge, in the last two decades, has conferred a new dimension to the process of endocytosis. Endocytic circuitries have come into focus as a pervasive system that controls virtual all aspects of cell biology. A few years ago, we proposed the term 'endocytic matrix' to define a cellular network of signalling wiring that is at the core of the cellular blueprint. A primary role of the endocytic matrix is the delivery of space-resolved and time-resolved signals to the cell in an interpretable format, and, as such, it has profound consequences on polarized cellular and supra-cellular functions, first and foremost, cell motility...
March 12, 2018: Current Opinion in Cell Biology
Olivier Poupel, Caroline Proux, Bernd Jagla, Tarek Msadek, Sarah Dubrac
The success of Staphylococcus aureus, as both a human and animal pathogen, stems from its ability to rapidly adapt to a wide spectrum of environmental conditions. Two-component systems (TCSs) play a crucial role in this process. Here, we describe a novel staphylococcal virulence factor, SpdC, an Abi-domain protein, involved in signal sensing and/or transduction. We have uncovered a functional link between the WalKR essential TCS and the SpdC Abi membrane protein. Expression of spdC is positively regulated by the WalKR system and, in turn, SpdC negatively controls WalKR regulon genes, effectively constituting a negative feedback loop...
March 2018: PLoS Pathogens
G H Renier Botha, Grant Theron, Rob Warren, Marisa Klopper, Kheertan Dheda, Paul van Helden, Thomas R Niesler
Globally, tuberculosis (TB) remains one of the most deadly diseases. Although several effective diagnosis methods exist, in lower income countries clinics may not be in a position to afford expensive equipment and employ the trained experts needed to interpret results. In these situations, symptoms including cough are commonly used to identify patients for testing. However, self-reported cough has suboptimal sensitivity and specificity, which may be improved by digital detection. This study investigates a simple and easily applied method for TB screening based on the automatic analysis of coughing sounds...
March 15, 2018: Physiological Measurement
Esther Morencos, Blanca Romero-Moraleda, Carlo Castagna, David Casamichana
PURPOSE: The aim of this study was to examine the influence of match period on the movement patterns of hockey players according to their playing position under the introduction of quarters. METHODS: Sixteen sub-elite level Spanish National League male hockey players participated in the study (age: 25.5 ± 2.9 years; body mass: 74.6 ± 5.5 kg). Global Positioning Systems (GPS) devices were used to monitor players running performance during 17 competitive matches (113 match-play profiles)...
March 15, 2018: International Journal of Sports Physiology and Performance
Marenka Smit, David Vállez García, Bauke M de Jong, Evelien Zoons, Jan Booij, Rudi A Dierckx, Antoon T Willemsen, Erik F de Vries, Anna L Bartels, Marina A Tijssen
Purpose: Alterations of the central serotonergic system have been implicated in the pathophysiology of dystonia. In this molecular imaging study, we assessed whether altered presynaptic serotonin transporter (SERT) binding contributes to the pathophysiology of cervical dystonia (CD), concerning both motor and non-motor symptoms (NMS). Methods: We assessed the non-displaceable binding potential (BPND ) using the selective SERT tracer [11 C]DASB and positron emission tomography (PET) in 14 CD patients and 12 age- and gender-matched controls...
2018: Frontiers in Neurology
Íñigo Corral, Susana Sainz de la Maza, Mario Rodríguez, Michal-Maciej Kawiorski, María-José López-Martínez, Juan-Carlos Galán
Neurological manifestations associated with HHV-7 have been described in primary infection in children, and very occasionally in immunocompromised adult patients. However, the role of HHV-7 reactivation as a cause of central nervous system (CNS) diseases in immunocompetent adults has not yet been defined. We retrospectively analyzed clinical and microbiological features of adults with neurological symptoms who underwent lumbar puncture and a multiplex polymerase chain reaction (PCR) for herpesviruses (HHV-1-8) and enteroviruses performed in cerebrospinal fluid (CSF), during a 4-year period...
March 13, 2018: Journal of Neurovirology
Qingyun Dai, Lei Xu, Lu Xiao, Kaixiang Zhu, Yunhong Song, Changfu Li, Lingfang Zhu, Xihui Shen, Yao Wang
Urease acts as an important acid resistance system and virulence factor that is widespread among microorganisms. RovM is a global regulator that regulates a series of genes and pathways including acid survival systems in the enteric bacterium Yersinia pseudotuberculosis (Yptb) . However, whether RovM regulates the urease activity in Yptb was still unknown. In this study, by using qualitative and quantitative urease assays, we show that the urease expression responds to nutrient conditions and the RovM protein represses urease expression by binding to its promoter...
2018: Frontiers in Microbiology
Ahmad Shafaati, Tao Lin, Ali Broumandan, Gérard Lachapelle
This paper introduces a novel double-differential vector phase-locked loop (DD-VPLL) for Global Navigation Satellite Systems (GNSS) that leverages carrier phase position solutions as well as base station measurements in the estimation of rover tracking loop parameters. The use of double differencing alleviates the need for estimating receiver clock dynamics and atmospheric delays; therefore, the navigation filter consists of the baseline dynamic states only. It is shown that using vector processing for carrier phase tracking leads to a significant enhancement in the receiver sensitivity compared to using the conventional scalar-based tracking loop (STL) and vector frequency locked loop (VFLL)...
March 13, 2018: Sensors
Jason McGahan, Con Burns, Seán Lacey, Tim Gabbett, Cian O' Neill
PURPOSE: This study investigated the positional running demands of elite Gaelic football players during match-play and compared these demands with typical training activities used to prepare players for competition. METHODS: Global positioning system (GPS) data was obtained from thirty elite Gaelic football players (26.9 ± 3.5 years, 182.8 ± 6.1 cm, 84.6 ± 8.1 kg) across a full season (13 competitive games and 78 training sessions). Only players who completed the full match and respective training sessions were included (n = 107 match files and n = 1,603 training files)...
March 12, 2018: Journal of Strength and Conditioning Research
Jiemeng Tao, Delong Meng, Chong Qin, Xueduan Liu, Yili Liang, Yunhua Xiao, Zhenghua Liu, Yabing Gu, Juan Li, Huaqun Yin
Microbes play a critical role in soil global biogeochemical circulation and microbe-microbe interactions have also evoked enormous interests in recent years. Utilization of green manures can stimulate microbial activity and affect microbial composition and diversity. However, few studies focus on the microbial interactions or detect the key functional members in communities. With the advances of metagenomic technologies, network analysis has been used as a powerful tool to detect robust interactions between microbial members...
March 12, 2018: Applied Microbiology and Biotechnology
Lily Kpobi, Leslie Swartz
BACKGROUND: Many current debates about global mental health have increasingly called for collaboration between biomedical and traditional medical health systems. Despite these calls, not much has been written about the variables that would influence such collaboration. To a large extent, collaboration dialogues have considered biomedicine on the one hand, and a wide range of traditional and faith-based treatments on the other hand. However, this dualistic bifurcation does not reflect the plurality of healing systems in operation in many contexts, and the diverse investments that different non-biomedical healing approaches may have in their own power to heal...
2018: Global Health Action
Cesar Nombela
On November 21, 2017, Professor Julio R. Villanueva died in Salamanca. Born on April 27, 1928 in Villamayor, council of Piloña (Asturias), he lived almost to the age of 90. His was an accomplished life, full of endeavors and exciting works in the world of research and teaching, which earned him very broad recognition both in Spain and the international arena. Villanueva was undoubtedly the driving force of Fundamental Microbiology in Spain. His early steps came at a time when experimental biology was arriving at an important new age, using microbial systems for experimentation that lead to general conclusions about all living beings...
December 2017: International Microbiology: the Official Journal of the Spanish Society for Microbiology
Srikant Chakravarthi, Alejandro Monroy-Sosa, Lior Gonen, Melanie Fukui, Richard Rovin, Nathaniel Kojis, Mark Lindsay, Sammy Khalili, Juanita Celix, Martin Corsten, Amin Kassam
Endoscopic endonasal access to the jugular foramen and occipital condyle-the transcondylar- transtubercular approach-is anatomically complex and requires detailed knowledge of the relative position of critical neurovascular structures, in order to avoid inadvertent injury and resultant complications. However, access to this region can be confusing as the orientation and relationships of osseous, vascular, and neural structures are very much different from traditional dorsal approaches. This review aims at providing an organizational construct for a more understandable framework in accessing the transcondylar-transtubercular window...
March 8, 2018: Journal of Neurosurgical Sciences
Daniel Ramskov, Sten Rasmussen, Henrik Sørensen, Erik Thorlund Parner, Martin Lind, Rasmus Oestergaard Nielsen
Background/aim: The Run Clever trial investigated if there was a difference in injury occurrence across two running schedules, focusing on progression in volume of running intensity (Sch-I) or in total running volume (Sch-V). It was hypothesised that 15% more runners with a focus on progression in volume of running intensity would sustain an injury compared with runners with a focus on progression in total running volume. Methods: Healthy recreational runners were included and randomly allocated to Sch-I or Sch-V...
2018: BMJ Open Sport & Exercise Medicine
S Jerez, S Díaz-Infante, B Chen
In this work, we model osteoclast-osteoblast population dynamics with random environmental fluctuations in order to understand the random variations of the bone remodeling process in real life. For this purpose, we construct a stochastic differential model for the interactions between the osteoclast and osteoblast cell populations using the parameter perturbation technique. We prove the existence of a globally attractive positive unique solution for the stochastically perturbed system. Also, the stochastic boundedness of the solution is demonstrated using its p-th order moments for p ≥ 1...
March 8, 2018: Mathematical Biosciences
Vincent Boulanger, Jean-Luc Dupouey, Frédéric Archaux, Vincent Badeau, Christophe Baltzinger, Richard Chevalier, Emmanuel Corcket, Yann Dumas, Françoise Forgeard, Anders Mårell, Pierre Montpied, Yoan Paillet, Sonia Saïd, Erwin Ulrich
In Boulanger et al. (2018), we assessed the role of ungulates' presence on short-term understory plant dynamics, using a nationwide network composed of paired exclosure-control plots. We demonstrated that ungulates are key drivers of understory vegetation in managed forests since they alter the richness and abundance of the shrub layer, increase the richness of the herb layer and favour open habitat plant species. Our results show that local scale mechanisms, here involving indirect facilitation, lead to global dynamics in forest-ungulate systems...
March 11, 2018: Global Change Biology
Tracy Ssali, Udunna C Anazodo, Jonathan D Thiessen, Frank S Prato, Keith St Lawrence
While positron emission tomography (PET) with15 O-water is the gold standard for imaging cerebral blood flow (CBF), quantification requires measuring the arterial input function (AIF), which is an invasive and noisy procedure. To circumvent this problem, we propose a non-invasive PET/ magnetic resonance (MR) approach that eliminates the need to measure the AIF by using global CBF determined by phase-contrast (PC) magnetic resonance imaging (MRI) as a reference region. Not only is this approach non-invasive, it adds no additional imaging time as PC MRI and15 O-water PET are acquired simultaneously...
March 9, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Satish Maharaj, Karan Seegobin, Stephen Chrzanowski, Simone Chang
Streptococcus anginosus is a clinically important pathogen that is emerging globally but remains poorly investigated. Here, we report the first case of acute glomerulonephritis resulting from infection with S. anginosus Glomerulonephritis is typically caused by S. pyogenes and reports secondary to other strains including S. zooepidemicus and S. constellatus exist. Infection with S. anginosus in this patient was associated with acute nephritis (haematuria, oedema and hypertension), nephrotic syndrome and progressive azotemia...
March 9, 2018: BMJ Case Reports
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