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Results 301 - 350 of 2019
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Orozco-Fuentes Sirio - - 2013
Nonmotile elongated bacteria confined in two-dimensional open microchannels can exhibit collective motion and form dense monolayers with nematic order if the cells proliferate, i.e., grow and divide. Using soft molecular dynamics simulations of a system of rods interacting through short range mechanical forces, we study the effects of the cell ...
Syrek Christine J - - 2013
The objective of this article is to investigate transformational leadership as a potential moderator of the negative relationship of time pressure to work-life balance and of the positive relationship between time pressure and exhaustion. Recent research regards time pressure as a challenge stressor; while being positively related to motivation and ...
Smith Nadia Alexandra Sofia - - 2013
High Pressure Shift Freezing (HPSF) has been proven more beneficial for ice crystal size and shape than traditional (at atmospheric pressure) freezing. A model for growth and coarsening of ice crystals inside a frozen food sample (either at atmospheric or high pressure) is developed and some numerical experiments are given, ...
Martel Eric - - 2013
This study compared indirect blood pressure measurements using a non-invasive method, high-definition oscillometry (HDO), with direct measurements using a radio-telemetry device in awake cats. Paired measurements partitioned to five sub-ranges were collected in six cats using both methods. The results were analysed for assessment of correlation and agreement between the ...
Hung P K - - 2013
We have numerically studied the diffusion mechanism in silica liquid following an approach where the diffusion rate is evaluated via the SiOx → SiOx ±1 reaction rate υreact and the mean square displacement of particles dreact as a reaction happens. Five models at pressure up to 25 GPa and at ...
Rieke Horst H Department of Anesthesia and Perioperative Medicine, Medical University of South Carolina, 167 Ashley Avenue, Suite 301, Charleston, SC 29425, United States. Electronic address: - - 2013
Quality chest compressions (CC) are the most important factor in successful cardiopulmonary resuscitation. Adjustment of CC based upon an invasive arterial blood pressure (ABP) display would be theoretically beneficial. Additionally, having one compressor present for longer than a 2-min cycle with an ABP display may allow for a learning process ...
Lu Bo - - 2013
Voltage-biased solid-state nanopores are well established in their ability to detect and characterize single polymers, such as DNA, in electrolytes. The addition of a pressure gradient across the nanopore yields a second molecular driving force that provides new freedom for studying molecules in nanopores. In this work, we show that ...
Shang Fujun - - 2013
The aim of this study was to validate the iHealth BP5 wireless upper arm blood pressure (BP) monitor according to the European Society of Hypertension International Protocol (ESH-IP) revision 2010. The ESH-IP revision 2010 for validation of BP measuring devices in adults was followed precisely. A total of 99 pairs ...
Ryan Cormac G - - 2013
Low back pain (LBP) is a major cause of work absence. Assisting individuals back into work is an important part of rehabilitation. To explore the experiences of individuals returning to work after an episode of sickness absence due to LBP. Five women employed by a UK University who had returned ...
Zhou Mi - - 2013
In-situ high pressure Raman spectra of S-trioxane have been measured up to 28 GPa. A first-order phase transition was detected around at 3 GPa from the splitting, newly existing and diminishing of the internal modes, and from changes in the slope on plots of frequency versus pressure. The vibrational spectra ...
Zhu J - - 2013
Topological superconductivity is one of most fascinating properties of topological quantum matters that was theoretically proposed and can support Majorana Fermions at the edge state. Superconductivity was previously realized in a Cu-intercalated Bi2Se3 topological compound or a Bi2Te3 topological compound at high pressure. Here we report the discovery of superconductivity ...
Modir-Rousta Ali - - 2013
Typically sweeping- reversed migration EKC (RM-EKC) is used for online enrichment and separation of neutral compounds in CE, however sweeping is not usually suitable for highly polar neutral compounds due to the lack of strong interaction with micellar phase. Since acidic BGE or coated capillaries (BGE pH 2-8) are used ...
Tognotti Danika - - 2013
The effects of a single-point, F29A, cavity-forming mutation on the unfolding thermodynamic parameters of azurin from Pseudomonas aeruginosa and on the internal dynamics of the protein fold under pressure were probed by the fluorescence and phosphorescence emission of Trp48, deeply buried in the compact hydrophobic core of the macromolecule. Pressure-induced ...
Pickett Stephanie - - 2013
Guided by Leventhal's common sense model of illness representations, this study examined the relationship between hypertension beliefs and self-care behaviors necessary for blood pressure (BP) control in a sample of 111 community-dwelling African Americans with hypertension. Participants completed the revised Illness Perception Questionnaire, BP Self-Care Scale, and a demographic data ...
Bottenberg Michelle M - - 2013
Objective. To compare student accuracy in measuring normal and high blood pressures using a simulator arm. Methods. In this prospective, single-blind, study involving third-year pharmacy students, simulator arms were programmed with prespecified normal and high blood pressures. Students measured preset normal and high diastolic and systolic blood pressure using a ...
Santamaria Ruben - - 2013
Endohedrally encapsulated hydrogen clusters doped with inert helium ($H_{24}He$) and ionic lithium ($H_{24}Li^+$) are investigated. The confinement model is a nanoscopic analog of the experimental compression of solid hydrogen. The structural and electronic properties of the doped hydrogen clusters are determined under the effects of pressure. The results are compared ...
Zvoriste-Walters C E - - 2013
The structural behaviour under compression of different lanthanide (La, Gd, Ho, Yb) and actinide (Am) monochalcogenides is studied by means of in situ high-pressure x-ray diffraction. All the investigated compounds crystallize at ambient conditions within a cubic (B1) NaCl-type structure but show different behaviours at high pressures. LaTe and AmTe ...
Ruiz-Rodríguez Juan C - - 2013
PURPOSE: To develop and validate a continuous non-invasive blood pressure (BP) monitoring system using photoplethysmography (PPG) technology through pulse oximetry (PO). METHODS: This prospective study was conducted at a critical care department and post-anesthesia care unit of a university teaching hospital. Inclusion criteria were critically ill adult patients undergoing invasive ...
González-Varo Juan P JP Estación Biológica de Doñana (EBD-CSIC), Avda. Américo Vespucio, s/n, Isla de la Cartuja, 41092 Sevilla, Spain. - - 2013
Pollination is an essential process in the sexual reproduction of seed plants and a key ecosystem service to human welfare. Animal pollinators decline as a consequence of five major global change pressures: climate change, landscape alteration, agricultural intensification, non-native species, and spread of pathogens. These pressures, which differ in their ...
Olson Randal S RS Department of Computer Science and Engineering, Michigan State University, East Lansing, MI 48824, USA. - - 2013
Swarming behaviours in animals have been extensively studied owing to their implications for the evolution of cooperation, social cognition and predator-prey dynamics. An important goal of these studies is discerning which evolutionary pressures favour the formation of swarms. One hypothesis is that swarms arise because the presence of multiple moving ...
Middleton S D - - 2013
The UK National Patient Safety Agency issued a rapid response report in 2009 following reports of complications related to digital tourniquet use and inadvertent retention. In their guidance, they recommend the use of CE marked digital tourniquets and advise against the use of surgical gloves. There are a number of ...
Hung P K - - 2013
We have studied the diffusion mechanism in silica liquid following a new approach where the diffusion rate is estimated via the rate of SiO x [Formula: see text] SiO x±1 and the mean square displacement of Si particles per SiO x [Formula: see text] SiO x±1 . Molecular dynamics simulation ...
Lamina Sikiru - - 2013
To investigate the effects of interval training programme on blood pressure, maximal oxygen consumption, indices of adiposity and metabolic markers in black African men with essential hypertension. The study was conducted at Murtala Muhammed Specialist Hospital, Kano, Nigeria, from October 24, 2007 to February 24, 2009. It comprised 245 male ...
Seagle C T - - 2013
A near-normal visible reflectivity system was constructed for investigating the optical properties of materials at high pressure and temperatures. The system consists of focusing optics, spectrometers, and imaging cameras for use with a resistively-heated membrane-controlled diamond anvil cell (DAC). The DAC allows optical access on two sides: one dedicated to ...
Okeahialam B N BN Department of Medicine, University of Jos, Plateau State, Nigeria. - - 2013
Hypertensives are screened for proteinuria largely to detect kidney involvement. In most reports from urban areas, the burden is considerable. We decided to see the scenario in a rural setting with the opportunity presented by our cardiovascular disease (CVD) survey of a rural area in North Central Nigeria. In 2008 ...
Herbst Daniel P - - 2013
Improvements in micropore arterial line filter designs used for extracorporeal circulation are still needed because microbubbles larger than the rated pore sizes are being detected beyond the filter outlet. Linked to principles governing the function of micropore filters, fluid pressures contained in extracorporeal circuits also influence the behavior of gas ...
de Greeff Annemarie - - 2013
The Tensoval Duo Control II is an automated upper arm device that uses a combination of oscillometric and auscultatory technology to determine blood pressure noninvasively. The accuracy of this device was assessed according to the British Hypertension Society (BHS) protocol and the European Society of Hypertension International Protocol revision 2010 ...
Perez Edson V - - 2013
An instrument was built for the permeation testing of flat polymer membranes under pressures up to 3.0 MPa and temperatures up to 300 °C. The high pressure, high temperature cell uses aluminum tape and a graphite gasket to minimize the leak from the high pressure side to the low pressure side, ...
Koo Juny - - 2013
There seems to be a general relation between the standard Gibbs energy change of unfolding, ΔG°unf , of a protein and its affinity to aqueous-solid interfaces. So-called "hard" proteins (ΔG°unf is large) are found to adsorb less strongly to such interfaces than "soft" proteins (ΔG°unf is small). Here, we provide ...
Kebede Biniam T - - 2013
For the first time in literature, this study compares the process-induced chemical reactions in three industrially relevant green vegetables: broccoli, green pepper and spinach treated with thermal and high pressure high temperature (HPHT) processing. Aiming for a fair comparison, the processing conditions were selected based on the principle of equivalence. ...
Swiety-Pospiech A - - 2013
Broadband dielectric spectroscopy and pressure-temperature-volume methods are employed to investigate the effect of hydrostatic pressure on the conductivity relaxation time (τσ), both in the supercooled and glassy states of protic ionic liquid lidocaine hydrochloride monohydrate. Due to the decoupling between the ion conductivity and structural dynamics, the characteristic change in ...
McCarthy B M - - 2013
Pulse transit time (PTT) is defined as the time it takes the blood pressure (BP) wave to propagate from the heart to a specified point on the body. After an initial BP measurement, PTT can track BP over short periods of time. This paper evaluates two PTT algorithms: Chen's and ...
Ng Kim-Gau - - 2013
Standardized protocols for validating the clinical accuracy of noninvasive blood pressure (NIBP) monitors have been available since 1987. Some of them were developed by standards bodies and others by professional organizations. They have been well-tested through use and progressively improved through multiple revisions; however, many methodological differences exist between them. ...
Mathern Ryan Michael - - 2013
Abstract This paper presents the designs of four low-cost and ruggedized biomedical devices, including a blood pressure monitor, thermometer, weighing scale and spirometer, designed for the East African context. The design constraints included a mass-production price point of $10, accuracy and precision comparable to commercial devices and ruggedness to function ...
Miller Scott F - - 2013
The model-based, rapid-prototyping-enabled design and manufacture of a pulsatile blood vessel (PBV) for high-fidelity mannequin-based clinical simulations is presented. The PBV presented here is a pressurized, flexible tube with alternating fluid pressure created by a pump to mimic the behavior of a human vessel in response to pulsatile pressure. The ...
Muntner Paul - - 2013
Blood pressure (BP) is known to vary over time within individuals. Although variability between office visits has traditionally been regarded as a barrier to the accurate measurement of BP, several recent studies have reported strong associations between visit-to-visit variability (VVV) of BP and increased risk for cardiovascular outcomes. In this ...
Basiri Parsa Jalal - - 2013
A low pressure pilot scale hydrodynamic cavitation (HC) reactor with 30L volume, using fixed scrap iron sheets, as the heterogeneous catalyst, with no external source of H2O2 was devised to investigate the effects of operating parameters of the HC reactor performance. In situ generation of Fenton reagents suggested an induced ...
Reynolds A M AM Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK. - - 2013
Composite correlated random walks have been posited as a strong alternative to Lévy walks as models of multi-scale forager movement patterns. Here it is shown that if plastic then intrinsic composite correlated random walks will, under selection pressures, evolve to resemble optimal Lévy walks when foraging is non-destructive. The fittest ...
Loubeyre Louis - - 2013
Brillouin and Raman scattering experiments on methanol through its glass transition under pressure are reported. The Brillouin scattering data were analyzed using viscoelastic theory and a fit to the Vinet equation of state. The variation in the linewidth of the longitudinal acoustic mode with pressure shows a broad maximum centered ...
Yedukondalu N - - 2013
High pressure behavior of potassium chlorate (KClO3) has been investigated from 0 to 10 GPa by means of first principles density functional theory calculations. The calculated ground state parameters, transition pressure, and phonon frequencies using semiempirical dispersion correction scheme are in excellent agreement with experiment. It is found that KClO3 ...
Schlabs Thomas T Department of Orthopedic Surgery, University of California-San Diego Medical Center, San Diego, California, USA. - - 2013
For future space exploration missions, it is important to determine the best method of simulating on Earth cardiovascular and biomechanical conditions for lunar and Martian gravities. For this purpose, we compared exercise performed within a lower body negative pressure (LBNP) and a lower body positive pressure (LBPP) chamber. Twelve subjects ...
Woolley Alan - - 2013
Control of the transients by the player has often been cited as one of the most important characteristics of mechanical pipe organ actions since their reintroduction toward the middle of the last century. Previous research indicates that players do not vary the way that they move the key to a ...
Chen Li - - 2013
A sharp-interface immersed boundary lattice Boltzmann method (IBLBM) is developed to reduce spurious-pressure oscillations in moving boundary problems. We adopt a cut-cell-based method, i.e., the partially saturated computational cell method, because the primary cause of spurious-pressure oscillations is the failure to obey the geometric conservation law near the boundary in ...
Becerro de Bengoa Vallejo Ricardo - - 2013
Background: Abnormal plantar pressures are the hallmark characteristic of several conditions and pathologic abnormalities. Pressure platforms allow for quick and accurate screening of patients and help guide clinical treatment. However, it is essential to evaluate the reliability and repeatability of these devices before making clinical decisions. The purpose of this ...
Skow Ellen A - - 2013
Energy harvesting from acoustic energy sources is a form of transduction. While energy densities in typical airborne acoustic noise fields are extremely low, those in hydraulic systems may be orders of magnitude greater and represent an opportunity for direct energy conversion from piezoelectric materials for powering sensor and communication nodes. ...
Habibi Ehsanollah - - 2013
Among the most important and effective factors affecting the efficiency of the human workforce are accuracy, promptness, and ability. In the context of promoting levels and quality of productivity, the aim of this study was to investigate the effects of exposure to noise on the rate of errors, speed of ...
Su Quang T - - 2013
An acoustic characterization method for directional microphones is presented that does not require an anechoic chamber to provide a controlled plane wave sound field. Measurements of a directional microphone under test are performed in a nearly arbitrary sound field for several angles of sound incidence, and the corresponding sound pressure ...
Ji Fu-Hai - - 2013
Stroke volume variation (SVV) is a robust indicator of fluid responsiveness during volume change. We compared the sensibility of SVV by Vigileo/Flotrac to central venous pressure (CVP) when volume changes in patients undergoing intraoperative acute normovolemic hemodilution (ANH) and acute hypervolemic hemodilution (AHH). Forty patients were randomly divided into an ...
Grasland-Mongrain Pol - - 2013
An ultrasonic hydrophone based on the Lorentz force is introduced. When a metallic wire is moved by ultrasound while submitted to a magnetic field, the Lorentz force induces an electrical current proportional to the integral of pressure along the wire. 2D pressure field mapping is achieved by performing a tomography ...
Fulcher Lewis - - 2013
Thirty-two pressure distributions at minimal diameters of d = 0.005, 0.0075, 0.01, 0.02, 0.04, 0.08, and 0.16 cm have been measured at a number of transglottal pressures of interest for phonation. Care is taken to identify those portions of the pressure distributions within the glottis that include substantial regions of uniform decrease ...
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