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Journal articles on the topic 'First generation of Spiral FSAT'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Hong, Zhao Bin, Zhao Jun Yang, Bai Chao Wang, and Xue Cheng Zhang. "Simulation Analysis of Spiral Bevel Gear Tooth Surface Generation Based on VERICUT." Applied Mechanics and Materials 273 (January 2013): 175–79. http://dx.doi.org/10.4028/www.scientific.net/amm.273.175.

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Based on the deeply study on VERICUT, the generating process of spiral bevel gear surface is simulated in this paper. A certain surface generation process of spiral bevel gear is analyzed as an example. First the 3D solid models of gear cutting machine, cutter and gear blank are built. Then the NC program is compiled based on the generating principle of tooth surface. Finally the surface generating movement of spiral bevel gear is realized through selecting control system and importing the NC program. It can be indicated that the simulation analysis of surface generation can optimize the cutti

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Pushkarev, A. I., and YU I. Isakova. "A spiral self-magnetically insulated ion diode." Laser and Particle Beams 30, no. 3 (2012): 427–33. http://dx.doi.org/10.1017/s0263034612000316.

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AbstractThe paper presets the results of a study on a self-magnetically insulated ion diode with an explosive-emission potential electrode. The experiments have been carried out using the TEMP-4M accelerator, operating in a double-pulse mode: the first negative pulse (300–500 ns, 100–150 kV) followed by the second positive pulse (150 ns, 250–300 kV). The ion beam energy density was 0.3–2.5 J/cm2; the beam was composed from carbon ions (80–85%) and protons. We studied several geometries of the diode: planar and focusing strip arrangement, annular and spiral geometries. It was shown that during

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Yang, Jian Jun, Qin Wu, Jun Gong, and Zhi Yuan Rui. "Design of Milling Cutter for Machining Helical Curved Surfaces." Applied Mechanics and Materials 44-47 (December 2010): 748–53. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.748.

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The article focused on the design of milling cutter for machining helical curved surfaces. First, the characteristics of 3th generation profile in screw compressor were presented; then the equation of touch line between milling cutter and workpiece was constituted based on the envelop principle from milling cutter rolling surface and spiral curved surface; and elementary theories and methods were put forward for designing contour of milling cutter in machining spiral curved surfaces, finally the calculate equation was validated through the machining example by Matlab.

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Duan, Wei, and Heng Chang Feng. "Stress and Modal Analysis of Flat Spiral Spring in Elastic Energy Storage Equipment." Applied Mechanics and Materials 121-126 (October 2011): 1754–58. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1754.

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The energy storage technology is playing an important role in improving power grid stability. Aiming to the randomness and intermittent characteristics of wind power generation, the paper proposed a scheme of mechanical elastic storage energy and power generation system based on flat spiral spring. The flat spiral spring, which is the core component in the system, is selected as the research object, and the mechanical model and the finite element model is created. The geometric parameters of spring are determined. The maximum deformation and the stress distribution of spring are obtained. More

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Savchenko, Sergey, Alexander Marchuk, Aleksandr Mosenkov, and Konstantin Grishunin. "A multiwavelength study of spiral structure in galaxies. I. General characteristics in the optical." Monthly Notices of the Royal Astronomical Society 493, no. 1 (2020): 390–409. http://dx.doi.org/10.1093/mnras/staa258.

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ABSTRACT Different spiral generation mechanisms are expected to produce different morphological and kinematic features. In this first paper in a series, we carefully study the parameters of spiral structure in 155 face-on spiral galaxies, selected from the Sloan Digital Sky Survey, in the three gri bands. We use a method for deriving a set of parameters of spiral structure, such as the width of the spiral arms, their fraction to the total galaxy luminosity, and their colour, which have not been properly studied before. Our method is based on an analysis of a set of photometric cuts perpendicul

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Donner, Karl Johan, Axel Brandenburg, and Magnus Thomasson. "Galactic Dynamos and Dynamics." Symposium - International Astronomical Union 157 (1993): 333–37. http://dx.doi.org/10.1017/s0074180900174376.

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We discuss some aspects of the interrelationship between the dynamo problem for galaxies and their dynamics. First, we consider the generation of magnetic fields in the presence of fountain flows and galactic winds. Next, we discuss the distortion of a steady magnetic field by tidal effects and other transient spiral features. Finally, we give an expression for the amplitude of density waves generated by large-scale non-axisymmetric fields.

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Huang, Xiang, and Z. X. Lin. "The Optimal Model of Tool Paths Generation for Pocket Milling." Materials Science Forum 626-627 (August 2009): 201–6. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.201.

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This paper describes an integrated method to determine optimal cutting parameters for milling pocket based on minimum cutting time. The main constraints entailed in real cutting, such as chatter free, uncut free tool paths, cutter and machine tool limitations, are included into the optimal model. The optimal parameters (depth of cut, width of cut, spindle speed) are inserted into the tool paths generation directly for four kinds of conventional cutting modes (Zig and Zig-Zag parallel cutting mode, inwards and outwards spiral pattern modes). According to the fact that the first cut in every cut

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Javierre, Carlos, L. Ponz, Isabel Clavería, and A. Fernández. "Validation of the Method for Generation of Rheological Model to Characterize Non-Conventional Injection Molding by Means of Spiral Mold." Advanced Materials Research 83-86 (December 2009): 250–60. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.250.

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This paper presents the results derived from the research, whose first results were presented at AMPT 2005. At this conference, a new method for generation of rheological model to characterize non-conventional injection moulding by means of spiral mould was presented. The continuity of this research line has consisted of the development of several tests for validation of the rheological model obtained with the new method. Viscosity of a PEHD with different percentages of recycled has been tested, by means of several kinds of rheometers, like capillary rheometer and rotational rheometer, and th

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Holwerda, B. W., S. Bianchi, M. Baes, et al. "New HErschel Multi-wavelength Extragalactic Survey of Edge-on Spirals (NHEMESES)." Proceedings of the International Astronomical Union 7, S284 (2011): 128–31. http://dx.doi.org/10.1017/s1743921312008897.

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AbstractEdge-on spiral galaxies offer a unique perspective on the vertical structure of spiral disks, both stars and the iconic dark dustlanes. The thickness of these dustlanes can now be resolved for the first time with Herschel in far-infrared and sub-mm emission. We present NHEMESES, an ongoing project that targets 12 edge-on spiral galaxies with the PACS and SPIRE instruments on Herschel. These vertically resolved observations of edge-on spirals will impact on several current topics.First and foremost, these Herschel observations will settle whether or not there is a phase change in the ve

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Liebmann, Max, Alexander Treffer, Martin Bock, Ulrike Wallrabe, and Ruediger Grunwald. "Ultrashort Vortex Pulses with Controlled Spectral Gouy Rotation." Applied Sciences 10, no. 12 (2020): 4288. http://dx.doi.org/10.3390/app10124288.

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Recently, the spatio-spectral propagation dynamic of ultrashort-pulsed vortex beams was demonstrated by 2D mapping of spectral moments. The rotation of characteristic anomalies, so-called “spectral eyes”, was explained by wavelength-dependent Gouy phase shift. Controlling of this spectral rotation is essential for specific applications, e.g., communication and processing. Here, we report on advanced concepts for spectral rotational control and related first-proof-of-principle experiments. The speed of rotation of spectral eyes during propagation is shown to be essentially determined by angular

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Vasilescu, Mircea Dorin. "Influence of Constructive and Technological Parameters at Generated Spiral Parts with DLP 3D Printing Process." Materiale Plastice 56, no. 4 (2019): 801–11. http://dx.doi.org/10.37358/mp.19.4.5269.

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This work are made for determine the possibility of generating the specific parts of a threaded assembly. If aspects of CAD generating specific elements was analysed over time in several works, the technological aspects of making components by printing processes 3D through optical polymerization process is less studied. Generating the threaded appeared as a necessity for the reconditioning technology or made components of the processing machines. To determine the technological aspects of 3D printing are arranged to achieve specific factors of the technological process, but also from the specif

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Nezlin, M. V., A. Yu Rylov, E. N. Snezhkin, K. B. Titishov, and G. P. Chernikov. "Rotating shallow water modeling of planetary,astrophysical and plasma vortical structures (plasma transport across a magnetic field,model of the jupiter's GRS, prediction of existence of giant vortices in spiral galaxies)." Discrete Dynamics in Nature and Society 3, no. 4 (1999): 251–66. http://dx.doi.org/10.1155/s102602269900028x.

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Three kinds of results have been described in this paper. Firstly, an experimental study of the Rossby vortex meridional drift on the rotating shallow water has been carried out. Owing to the stringent physical analogy between the Rossby vortices and drift vortices in the magnetized plasma, the results obtained have allowed one to make a conclusion that the transport rate of the plasma, trapped by the drift vortices, across the magnetic field is equivalent to the “gyro-Bohm” diffusion coefficient. Secondly, a model of big vortices of the type of the Great Red Spot of Jupiter, dominating in the

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Hadeed, Michael M., Hans Prakash, Seth R. Yarboro, and David B. Weiss. "Intramedullary nailing of extra-articular distal tibial fractures." Bone & Joint Journal 103-B, no. 2 (2021): 294–98. http://dx.doi.org/10.1302/0301-620x.103b2.bjj-2020-0404.r2.

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Aims The aim of this study was to determine the immediate post-fixation stability of a distal tibial fracture fixed with an intramedullary nail using a biomechanical model. This was used as a surrogate for immediate weight-bearing postoperatively. The goal was to help inform postoperative protocols. Methods A biomechanical model of distal metaphyseal tibial fractures was created using a fourth-generation composite bone model. Three fracture patterns were tested: spiral, oblique, and multifragmented. Each fracture extended to within 4 cm to 5 cm of the plafond. The models were nearly-anatomical

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Shibagaki, Shota, Takami Kuroda, Kei Kotake, and Tomoya Takiwaki. "Characteristic time variability of gravitational-wave and neutrino signals from three-dimensional simulations of non-rotating and rapidly rotating stellar core collapse." Monthly Notices of the Royal Astronomical Society 502, no. 2 (2021): 3066–84. http://dx.doi.org/10.1093/mnras/stab228.

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ABSTRACT We present results from full general relativistic 3D hydrodynamics simulations of stellar core collapse of a 70 M⊙ star with spectral neutrino transport. To investigate the impact of rotation on non-axisymmetric instabilities, we compute three models by parametrically changing the initial strength of rotation. The most rapidly rotating model exhibits a transient development of the low-T/|W| instability with one-armed spiral flow at the early post-bounce phase. Subsequently, the two-armed spiral flow appears, which persists during the simulation time. The moderately rotating model also

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Ghosh, S., and C. J. Jog. "Effect of finite disk-thickness on swing amplification of non-axisymmetric perturbations in a sheared galactic disk." Astronomy & Astrophysics 617 (September 2018): A47. http://dx.doi.org/10.1051/0004-6361/201832988.

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A typical galactic disk is observed to have a finite thickness. Here, we present the study of the physical effect of introduction of finite thickness on the generation of small-scale spiral arms by swing amplification in a differentially rotating galactic disk. The galactic disk is modelled first as a one-fluid system, and then as a gravitationally-coupled two-fluid (stars and gas) system where each fluid is taken as isothermal, and corotating with each other. We derived the equations governing the evolution of the non-axisymmetric perturbations in a sheared frame of reference while incorporat

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Arayanarakool, Rerngchai, Hian See, Samuel Marshall, et al. "Rapid Prototyping of Polymer-Based Rolled-Up Microfluidic Devices." Micromachines 9, no. 10 (2018): 516. http://dx.doi.org/10.3390/mi9100516.

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This work presents the simple and rapid fabrication of a polymer-based microfluidic prototype manufactured by rolling up thin films of polymer. The thin films were fabricated via a casting method and rolled up around a center core with the aid of plasma activation to create a three-dimensional (3D) spiral microchannel, hence reducing the time and cost of manufacture. In this work, rolled-up devices with single or dual fluidic networks fabricated from a single or two films were demonstrated for heat sink or heat exchanger applications, respectively. The experimental results show good heat trans

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17

Cordeiro, Luciana, Cassia Baldini Soares, and Leslie Rittenmeyer. "Unscrambling method and methodology in action research traditions: theoretical conceptualization of praxis and emancipation." Qualitative Research 17, no. 4 (2016): 395–407. http://dx.doi.org/10.1177/1468794116674771.

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Action research is a participatory approach that is used in an array of contexts. From its first proposition it comprises four core principles: participation and collaboration; a constant spiral cycle of self-reflection; knowledge generation; and practice transformation. Praxis and emancipation are two important analytical categories in AR, but are conceptualized differently in the two existing AR traditions. These conceptualizations reveal different AR aims, which lead to either the use of AR as a method (Northern tradition) or as a methodology (Southern tradition). Much depends on the resear

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Leclaire, Benjamin, and Laurent Jacquin. "On the generation of swirling jets: high-Reynolds-number rotating flow in a pipe with a final contraction." Journal of Fluid Mechanics 692 (December 16, 2011): 78–111. http://dx.doi.org/10.1017/jfm.2011.497.

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AbstractWe investigate the generation conditions of a high-Reynolds-number swirling jet experiment, based on a rotating honeycomb device and using a final contraction. Using hot-wire measurements, we first show that for high swirl levels, the flow at the jet exhaust may exhibit fully developed turbulence in the whole plane. By analysing the fluctuation levels obtained for several values of the contraction ratio, ranging from 4 to 18.4, we prove that this turbulence does not result from upstream-propagating disturbances initiated in the jet, but originates in the pipe flow upstream of the exit

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Zhang, Hua, Ming Yu Huang, and Hong Jun Ni. "Research on the Structure of Cylindrical Proton Exchange Membrane Fuel Cell Based on ANSYS." Advanced Materials Research 550-553 (July 2012): 439–42. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.439.

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Proton exchange membrane fuel cells (PEMFCs) are considered to be a promising technology for clean and efficient power generation in the twenty-first century. Current PEMFCs are usually flat designs which needs the expensive bi-polar to transport the reactants to every fuel cell. In this paper, a novel cylindrical PEMFC has been designed and made. The structure of cathode is a spiral. The static analysis and thermal analysis of the cell shell and the spiraled cathode were carried out with FEM software. Based on the simulation, the cylindrical PEMFC has been made and tested. The simulation resu

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García-Morantes, Edgar, Iván Amaya-Contreras, and Rodrigo Correa-Cely. "Internal volumetric heat generation and heat capacity prediction during a material electromagnetic treatment process using hybrid algorithms." Ingeniería e Investigación 38, no. 1 (2018): 74–82. http://dx.doi.org/10.15446/ing.investig.v38n1.64225.

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This work considers the estimation of internal volumetric heat generation, as well as the heat capacity of a solid spherical sample, heated by a homogeneous, time-varying electromagnetic field. To that end, the numerical strategy solves the corresponding inverse problem. Three functional forms (linear, sinusoidal, and exponential) for the electromagnetic field were considered. White Gaussian noise was incorporated into the theoretical temperature profile (i.e. the solution of the direct problem) to simulate a more realistic situation. Temperature was pretended to be read through four sensors.

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Pavlinkova, Gabriela. "Molecular Aspects of the Development and Function of Auditory Neurons." International Journal of Molecular Sciences 22, no. 1 (2020): 131. http://dx.doi.org/10.3390/ijms22010131.

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This review provides an up-to-date source of information on the primary auditory neurons or spiral ganglion neurons in the cochlea. These neurons transmit auditory information in the form of electric signals from sensory hair cells to the first auditory nuclei of the brain stem, the cochlear nuclei. Congenital and acquired neurosensory hearing loss affects millions of people worldwide. An increasing body of evidence suggest that the primary auditory neurons degenerate due to noise exposure and aging more readily than sensory cells, and thus, auditory neurons are a primary target for regenerati

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Vafaeesefat, A., and H. A. EIMaraghy. "ROUGH MACHINING FOR MULTI-SCULPTURED SURFACES." Transactions of the Canadian Society for Mechanical Engineering 23, no. 2 (1999): 275–86. http://dx.doi.org/10.1139/tcsme-1999-0019.

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This paper present a method to generate 3-axis NC programs for rough milling processes. A raster digitizing of the solid volume delimitated by sculptured surfaces to be machined is first created. This is accomplished by using the so-called Z-buffer created from a parallel projection of all surfaces. Conventional rendering software can be used to generate the Z-buffer. This volume is transformed into a 3-D mesh composed of “empty”, “full”, and “mixed” blocks. Machining is preformed from top to bottom in a sequence of horizontal cutting planes. At each level of planar machining, spiral routines

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Eden, D. J., T. J. T. Moore, M. J. Currie, et al. "CHIMPS2: survey description and 12CO emission in the Galactic Centre." Monthly Notices of the Royal Astronomical Society 498, no. 4 (2020): 5936–51. http://dx.doi.org/10.1093/mnras/staa2734.

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ABSTRACT The latest generation of Galactic Plane surveys is enhancing our ability to study the effects of galactic environment upon the process of star formation. We present the first data from CO Heterodyne Inner Milky Way Plane Survey 2 (CHIMPS2). CHIMPS2 is a survey that will observe the Inner Galaxy, the Central Molecular Zone (CMZ), and a section of the Outer Galaxy in 12CO, 13CO, and C18O $(J = 3\rightarrow 2)$ emission with the Heterodyne Array Receiver Program on the James Clerk Maxwell Telescope (JCMT). The first CHIMPS2 data presented here are a first look towards the CMZ in 12CO J =

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Romvári, Róbert, András Szabó, Gabriella Andrássy, Zsolt Petrási, Tamás Donkó, and Péter Horn. "Cross-sectional imaging assisted selection for heart performance in pigs." Acta Veterinaria Hungarica 56, no. 3 (2008): 313–22. http://dx.doi.org/10.1556/avet.56.2008.3.5.

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A two-way selection procedure was performed on a Landrace pig line. First the cardiac output (CO) values (6.89 ± 1.27 L/min) were estimated by ECG-gated magnetic resonance imaging (MRI) to quantify the heart performance of the boars (n = 30), then total body skeletal muscle volume (MVTB; 48.7 ± 5.17 dm 3 ) was determined applying spiral computerised tomography (CT). The relative cardiac output value (RCO) was developed, expressing the relationship between CO and MVTB. Four superior [RCO value below 6.7 dm 3 / (L * min −1 )] and one minus variant [(8.97 dm 3 / (L * min −1 )] boars were taken in

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Bonache-Samaniego, Ricardo, Carlos Olalla, Hugo Valderrama-Blavi, and Luis Martínez-Salamero. "Analysis and Design of Self-Oscillating Resonant Converters with Loss-Free Resistor Characteristics." Energies 13, no. 14 (2020): 3743. http://dx.doi.org/10.3390/en13143743.

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A general approach for the analysis and design of self-oscillating resonant converters is presented in this paper, for a particular class of circuits in which the change of input voltage polarity is caused by the zero-crossings of the input inductor current. The key features of the method are an analytical description in the time-domain of a spiral that eventually converges into an ellipse, and a frequency–domain analysis that explains the behavior of the ellipse as a limit cycle. On a theoretical basis, this class of circuits behaves as loss-free resistors (LFR) because in steady-state the in

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Cordiner, M. A. "Extragalactic Diffuse Interstellar Bands: A Universal Problem." Proceedings of the International Astronomical Union 9, S297 (2013): 41–50. http://dx.doi.org/10.1017/s174392131301555x.

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AbstractThe first extragalactic diffuse interstellar band (DIB) detections were of λ4430 in the Large and Small Magellanic Clouds (LMC and SMC) in the 1960s and 70s. Driven mainly by the increased sensitivity afforded by 8-10 m-class telescopes, the last 13 years have witnessed an explosion of DIB discoveries throughout the nearby and distant universe. This review focuses on the history of extragalactic DIB studies, including some of the important results that have come out of this field, and looks to the future for what can be learned about DIBs in external galaxies with the next generation o

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Mileykovskaya, Eugenia, Qin Sun, William Margolin, and William Dowhan. "Localization and Function of Early Cell Division Proteins in Filamentous Escherichia coli Cells Lacking Phosphatidylethanolamine." Journal of Bacteriology 180, no. 16 (1998): 4252–57. http://dx.doi.org/10.1128/jb.180.16.4252-4257.1998.

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ABSTRACT Escherichia coli cells that contain thepss-93 null mutation are completely deficient in the major membrane phospholipid phosphatidylethanolamine (PE). Such cells are defective in cell division. To gain insight into how a phospholipid defect could block cytokinesis, we used fluorescence techniques on whole cells to investigate which step of the cell division cycle was affected. Several proteins essential for early steps in cytokinesis, such as FtsZ, ZipA, and FtsA, were able to localize as bands to potential division sites in pss-93 filaments, indicating that the generation and localiz

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Isabel Bernardos, María, María Benito, Fabio Iocco, et al. "The Large Magellanic Cloud with the Cherenkov Telescope Array." EPJ Web of Conferences 209 (2019): 01021. http://dx.doi.org/10.1051/epjconf/201920901021.

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The Large Magellanic Cloud (LMC) is a spiral galaxy, satellite of the Milky way with a high star formation activity. It represents a unique laboratory for studying an extended and spatially resolved star-forming galaxy through gamma-ray observatories. Therefore, the LMC survey is one of the key science projects for the Cherenkov Telescope Array (CTA), the next-generation ground-based gamma-ray observatory. In this document we present the work performed over the last year by the CTA working group dedicated to the LMC, in order to offer a first characterization of the LMC at TeV energies. We hav

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Martínez-Delgado, David, Dmitry Makarov, Behnam Javanmardi, et al. "Tracing satellite planes in the Sculptor group." Astronomy & Astrophysics 652 (August 2021): A48. http://dx.doi.org/10.1051/0004-6361/202141242.

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Context. In recent years, a new generation of large-scale imaging surveys have probed wide field regions for the first time around some nearby galaxies in an unprecedentedly low surface-brightness regime (∼28.0−29.0 mag arcsec−2). This provides the chance to discover very faint dwarf satellites by means of systematic visual inspection of these public deep images. Aims. In this paper, we report the first results of a systematic survey of faint dwarf spheroidal galaxies in the vicinity of the bright late-type spiral galaxy NGC 253 by means of a visual inspection of the images taken by the Dark E

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Staartjes, Victor E., Peter R. Seevinck, W. Peter Vandertop, Marijn van Stralen, and Marc L. Schröder. "Magnetic resonance imaging–based synthetic computed tomography of the lumbar spine for surgical planning: a clinical proof-of-concept." Neurosurgical Focus 50, no. 1 (2021): E13. http://dx.doi.org/10.3171/2020.10.focus20801.

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OBJECTIVEComputed tomography scanning of the lumbar spine incurs a radiation dose ranging from 3.5 mSv to 19.5 mSv as well as relevant costs and is commonly necessary for spinal neuronavigation. Mitigation of the need for treatment-planning CT scans in the presence of MRI facilitated by MRI-based synthetic CT (sCT) would revolutionize navigated lumbar spine surgery. The authors aim to demonstrate, as a proof of concept, the capability of deep learning–based generation of sCT scans from MRI of the lumbar spine in 3 cases and to evaluate the potential of sCT for surgical planning.METHODSSyntheti

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Bargsted, Mariana, Jesús Yeves, Cristóbal Merino, and Juan I. Venegas-Muggli. "Career success is not always an outcome: its mediating role between competence employability model and perceived employability." Career Development International 26, no. 2 (2021): 119–39. http://dx.doi.org/10.1108/cdi-06-2020-0141.

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PurposeCareer success has been understood as an outcome of career goals, achievement and employability resources. Recent research has enlightened its potential effect on career decisions and perceived employability. This paper aims to test the role of career success in the relationship between competence employability and perceived employability.Design/methodology/approachAn online survey was answered by 1,087 graduates from a large nonselective higher education institution that enrolls a significant number of first generation and lower socioeconomic background students. Structural equation mo

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Schiavi, Riccardo, Roberto Capuzzo-Dolcetta, Manuel Arca-Sedda, and Mario Spera. "Future merger of the Milky Way with the Andromeda galaxy and the fate of their supermassive black holes." Astronomy & Astrophysics 642 (October 2020): A30. http://dx.doi.org/10.1051/0004-6361/202038674.

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Our Galaxy and the nearby Andromeda galaxy (M 31) are the most massive members of the Local Group, and they seem to be a bound pair, despite the uncertainties on the relative motion of the two galaxies. A number of studies have shown that the two galaxies will likely undergo a close approach in the next 4−5 Gyr. We used direct N-body simulations to model this interaction to shed light on the future of the Milky Way – Andromeda system and for the first time explore the fate of the two supermassive black holes (SMBHs) that are located at their centers. We investigated how the uncertainties on th

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Rigby, A. J., T. J. T. Moore, D. J. Eden, et al. "CHIMPS: physical properties of molecular clumps across the inner Galaxy." Astronomy & Astrophysics 632 (November 27, 2019): A58. http://dx.doi.org/10.1051/0004-6361/201935236.

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The latest generation of high-angular-resolution unbiased Galactic plane surveys in molecular-gas tracers are enabling the interiors of molecular clouds to be studied across a range of environments. The CO Heterodyne Inner Milky Way Plane Survey (CHIMPS) simultaneously mapped a sector of the inner Galactic plane, within 27.8° ≲ ℓ ≲ 46.2° and |b|≤ 0°.5, in 13CO (3–2) and C18O (3–2) at an angular resolution of 15 arcsec. The combination of the CHIMPS data with 12CO (3–2) data from the CO High Resolution Survey (COHRS) has enabled us to perform a voxel-by-voxel local-thermodynamic-equilibrium (LT

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Mucciarini, C., S. Bellentani, G. Razzini, et al. "The role of contrast-enhanced ultrasound in detection of liver metastases from colorectal cancer: A prospective monocentric study." Journal of Clinical Oncology 27, no. 15_suppl (2009): e15105-e15105. http://dx.doi.org/10.1200/jco.2009.27.15_suppl.e15105.

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e15105 Background: Up to 15–25% of patients with colorectal cancer (CRC) will develop metacronous liver metastases during the follow up. The management and prognosis of these patients depend heavily on the early detection of metastases. The most effective surveillance strategy has not yet being extablished. The introduction of second generation ultrasound contrast agents have improved the ability of contrast-enhanced ultrasound (CEUS) in detecting and characterizing liver lesions, showing that its accuracy is comparable to that of spiral CT and MRI with a liver contrast agent, with a cost and

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Schwenzer, K., K. Brinkbäumer, R. Schmid, et al. "[F-18]FDG imaging of head and neck tumors: Comparison of hybrid PET, dedicated PET and CT." Nuklearmedizin 40, no. 05 (2001): 172–73. http://dx.doi.org/10.1055/s-0038-1623883.

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Summary Aim: Aim of the study was to evaluate [F-18] FDG imaging of head and neck tumors using a Hybrid-PET device of the 2nd or 3rd generation. Examinations were compared to dedicated PET and Spiral-CT. Methods: 54 patients suffering from head and neck tumors were examined using dedicated PET and Hybrid-PET after injection of 185-350 MBq [F-18] FDG. Examinations were carried out on the dedicated PET first followed by a scan on the Hybrid-PET. Dedicated PET was acquired in 3D mode, Hybrid-PET was performed in list mode using an axial filter. Reconstruction of data was performed itera-tively on

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Silvander, Johan, Magnus Wilson, Krzysztof Wnuk, and Mikael Svahnberg. "Supporting Continuous Changes to Business Intents." International Journal of Software Engineering and Knowledge Engineering 27, no. 08 (2017): 1167–98. http://dx.doi.org/10.1142/s0218194017500449.

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Software supporting an enterprise’s business, also known as a business support system, needs to support the correlation of activities between actors as well as influence the activities based on knowledge about the value networks in which the enterprise acts. This requires the use of policies and rules to guide or enforce the execution of strategies or tactics within an enterprise as well as in collaborations between enterprises. With the help of policies and rules, an enterprise is able to capture an actor’s intent in its business support system, and act according to this intent on behalf of t

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Patel, Ashish C., and C. G. Joshi. "Deoxyribonucleic Acid as a Tool for Digital Information Storage: An Overview." INDIAN JOURNAL OF VETERINARY SCIENCES AND BIOTECHNOLOGY 15, no. 01 (2019): 1–8. http://dx.doi.org/10.21887/ijvsbt.15.1.1.

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Current data storage technologies cannot keep pace longer with exponentially growing amounts of data through the extensive use of social networking photos and media, etc. The "digital world” with 4.4 zettabytes in 2013 has predicted it to reach 44 zettabytes by 2020. From the past 30 years, scientists and researchers have been trying to develop a robust way of storing data on a medium which is dense and ever-lasting and found DNA as the most promising storage medium. Unlike existing storage devices, DNA requires no maintenance, except the need to store at a cool and dark place. DNA has a small

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Abbas, Yassen, Margherita Y. Turco, Graham J. Burton, and Ashley Moffett. "Investigation of human trophoblast invasion in vitro." Human Reproduction Update 26, no. 4 (2020): 501–13. http://dx.doi.org/10.1093/humupd/dmaa017.

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Abstract BACKGROUND In humans, inadequate trophoblast invasion into the decidua is associated with the ‘great obstetrical syndromes’ which include pre-eclampsia, foetal growth restriction (FGR) and stillbirth. The mechanisms regulating invasion remain poorly understood, although interactions with the uterine environment are clearly of central importance. Extravillous trophoblast (EVT) cells invade the uterus and transform the spiral arteries. Progress in understanding how they invade has been limited due to the lack of good in vitro models. Firstly, there are no non-malignant cell lines that h

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Stetsiuk, Bohdan. "The origins and major trends in development of jazz piano stylistics." Aspects of Historical Musicology 19, no. 19 (2020): 411–28. http://dx.doi.org/10.34064/khnum2-19.24.

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This article characterizes development trends in jazz piano from its origins in the “third-layer” (Konen, V., 1984) of music (ragtime and other “pre-jazz” forms) to the present time (avant-garde and retro styles of the late 20th – early 21st centuries). Main attention was devoted to the stylistic sphere, which represents an entirety of techniques and methods of jazz piano improvisation and combines genre and style parameters. In this context, the currently available information about jazz pianism and its sources (Kinus,Y., 2008; Stoliar, R., 2017) was reviewed, and sociocultural determinants,

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Mora González, Lucía. "El narrador testigo en "Less than zero": la nueva novela norteamericana de los 80." Estudios Humanísticos. Filología, no. 10 (December 1, 1988): 187. http://dx.doi.org/10.18002/ehf.v0i10.4350.

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<p>Cuando Bret Easton Ellis publicó en el año 1985 «Less Than Zero», no se imaginó que su narración iba a tener éxito editorial. La acción de la novela se desarrolla en Los Angeles, constituyendo la obra de Ellis un retrato de una generación joven, que experimenta tempranamente con el sexo, las drogas y la desolación. "Less Than Zero" (título de una canción amarga de Elvis Costello) narra las vivencias de un joven estudiante que regresa a su casa de Los Angeles, para pasar las vacaciones de Navidad junto a sus padres. Clay relata cómo sus vacaciones se convierten en una vertiginosa espir

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Algorri, Jose Francisco, Virginia Urruchi, Noureddine Bennis, and Jose Manuel Sanchez-Pena. "Theoretical approach of a polymer stabilized blue phase beam steering." Photonics Letters of Poland 9, no. 1 (2017): 14. http://dx.doi.org/10.4302/plp.v9i1.705.

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Nematic liquid crystal (LC)-based beam steering has been reported for wide applications. However, for conventional nematic LC beam steering the thickness is of several microns in order to have a wider deflection angle. The response time is relatively slow and the diffraction efficiency is low. In this work, novel beam steering based on polymer stabilized blue phase liquid crystal (PS-BPLC) has been designed and theoretically analyzed. This special mesophase of the chiral doped nematic LC has several advantageous characteristics, for example no need for alignment layers, microsecond response ti

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Ouyang, Peichang, Kwok Wai Chung, David Bailey, Alain Nicolas, and Krzysztof Gdawiec. "Generation of advanced Escher-like spiral tessellations." Visual Computer, July 8, 2021. http://dx.doi.org/10.1007/s00371-021-02232-0.

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AbstractIn this paper, using both hand-drawn and computer-drawn graphics, we establish a method to generate advanced Escher-like spiral tessellations. We first give a way to achieve simple spiral tilings of cyclic symmetry. Then, we introduce several conformal mappings to generate three derived spiral tilings. To obtain Escher-like tessellations on the generated tilings, given pre-designed wallpaper motifs, we specify the tessellations’ implementation details. Finally, we exhibit a rich gallery of the generated Escher-like tessellations. According to the proposed method, one can produce a grea

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Xu, Jinting, Yukun Ji, Yuwen Sun, and Yuan-Shin Lee. "Spiral Tool Path Generation Method on Mesh Surfaces Guided by Radial Curves." Journal of Manufacturing Science and Engineering 140, no. 7 (2018). http://dx.doi.org/10.1115/1.4039918.

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This paper presents a new spiral smoothing method to generate smooth curved tool paths directly on mesh surfaces. Spiral tool paths are preferable for computer numerical control (CNC) milling, especially for high-speed machining. At present, most spiral tool path generation methods aim mainly for pocketing, and a few methods for machining complex surface also suffer from some inherent problems, such as selection of projecting direction, preprocessing of complex offset contours, easily affected by the mesh or mesh deformation. To address the limitations, a new spiral tool path method is propose

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Zheng, Fangyan, Lin Hua, Dingfang Chen, and Xinghui Han. "Generation of Noncircular Spiral Bevel Gears by Face-Milling Method." Journal of Manufacturing Science and Engineering 138, no. 8 (2016). http://dx.doi.org/10.1115/1.4033045.

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Noncircular bevel gears are applied in variable-speed transmissions with intersecting axes. Since dedicated machines for manufacturing noncircular bevel gears are not available, noncircular bevel gears are normally manufactured using universal computer numerically controlled (CNC) machining centers, resulting in poor productivity. This paper describes a face-milling method for generation of noncircular spiral bevel gears, which is analogous to the generation of spiral bevel and hypoid gears using CNC hypoid gear generators, such as Gleason free-form hypoid generators. As a result, the producti

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Landaw, Julian, Xiaoping Yuan, Peng-Sheng Chen, and Zhilin Qu. "The transient outward potassium current plays a key role in spiral wave breakup in ventricular tissue." American Journal of Physiology-Heart and Circulatory Physiology, January 1, 2021. http://dx.doi.org/10.1152/ajpheart.00608.2020.

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Spiral wave reentry as a mechanism of lethal ventricular arrhythmias has been widely demonstrated in animal experiments and recordings from human hearts. It has been shown that in structurally normal hearts, spiral waves are unstable, breaking up into multiple wavelets via dynamical instabilities. However, many of the second-generation action potential models give rise only to stable spiral waves, raising issues regarding the underlying mechanisms of spiral wave breakup. In this study, we carried out computer simulations of two-dimensional homogeneous tissues using five ventricular action pote

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Simon, Vilmos V. "Design and Manufacture of Spiral Bevel Gears With Reduced Transmission Errors." Journal of Mechanical Design 131, no. 4 (2009). http://dx.doi.org/10.1115/1.3087540.

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A method for the determination of the optimal polynomial functions for the conduction of machine-tool setting variations in pinion teeth finishing in order to reduce the transmission errors in spiral bevel gears is presented. Polynomial functions of order up to 5 are applied to conduct the variation in the cradle radial setting and in the cutting ratio in the process for pinion teeth generation. Two cases were investigated: In the first case, the coefficients of the polynomial functions are constant throughout the whole generation process of one pinion tooth-surface; in the second case, the co

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Schoenherr, Peggy, Sebastian Manz, Lukas Kuerten, et al. "Local electric-field control of multiferroic spin-spiral domains in TbMnO3." npj Quantum Materials 5, no. 1 (2020). http://dx.doi.org/10.1038/s41535-020-00289-z.

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AbstractSpin-spiral multiferroics exhibit a magnetoelectric coupling effects, leading to the formation of hybrid domains with inseparably entangled ferroelectric and antiferromagnetic order parameters. Due to this strong magnetoelectric coupling, conceptually advanced ways for controlling antiferromagnetism become possible and it has been reported that electric fields and laser pulses can reversibly switch the antiferromagnetic order. This switching of antiferromagnetic spin textures is of great interest for the emergent field of antiferromagnetic spintronics. Established approaches, however,

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Wang, Shenghui, Yuansheng Zhou, Xinru Liu, Shengjun Liu, and Jinyuan Tang. "An advanced comprehensive approach to accurately modeling the face-milled generated spiral bevel gears." Journal of Computing and Information Science in Engineering, November 18, 2020, 1–36. http://dx.doi.org/10.1115/1.4049152.

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Abstract The modeling of a spiral bevel gear (SBG) is a fundamental work to its design, analysis and manufacturing. The essential work of modeling SBGs is the generation of tooth surface points that meet the strict accuracy requirement of the SBG industry. Specially, if those points are evenly distributed, the 3D models can be efficiently generated by developing automatic programs, or else the tedious manual modeling process are usually applied with 3D commercial software. Hence, it is very beneficial to accurately generating those evenly distributed points with an approach that can stably and

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Najafpour, Ghasem, Parisa Nouri, and Mostafa Rahimnejad. "Bioelectricity generation in annulus structure of single chamber membrane-less microbial fuel cell using wastewater from chocolate industry." Linnaeus Eco-Tech, January 25, 2017. http://dx.doi.org/10.15626/eco-tech.2014.006.

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Microbial Fuel Cell (MFC) is an efficient system for generating low power where wastewater is substrate for the biocatalyst. In this work, Annular Single Chamber Microbial Fuel Cell (ASCMFC) with spiral anode was fabricated and tested. Carbon cloth and stainless steel 400 meshes were selected as cathode and anode electrodes, respectively. In order to enhance the conductivity of anode, the graphite coating was applied. A 40% platinum as catalyst was used on carbon based cathode in MFC. The carbon cloth was coated with 5% Nafion solution. In fact Nafion acts as Proton Exchange Membrane (PEM) in

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Stuttaford, Maria, Gabriela Glattstein-Young, and Leslie London. "'Dialogue, review and reflect': A spiral of co-learning and co-research to surface knowledge on the right to health." Gateways: International Journal of Community Research and Engagement 5 (August 29, 2012). http://dx.doi.org/10.5130/ijcre.v5i0.2369.

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This article explores how participants of a Learning Network, comprising members of six civil society organisations and academics from four universities, understand and participate in a dialogical process of co-learning and knowledge generation about the right to health. First, we describe a co-research process that facilitates the surfacing of previously suppressed or undocumented knowledge on the right to health. Second, we explore how co-research captures and disseminates knowledge related to collective action undertaken by civil society organisations working towards translating the right t

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