Sample records for electromagnetic gl double

  1. Energetic constraints on electromagnetic signals from double black hole mergers (United States)

    Dai, Lixin; McKinney, Jonathan C.; Miller, M. Coleman


    The possible Fermi detection of an electromagnetic counterpart to the double black hole merger GW150914 has inspired many theoretical models, some of which propose that the holes spiralled together inside a massive star. However, we show that the heat produced by the dynamical friction on such black hole orbits can exceed the stellar binding energy by a large factor, which means that this heat could destroy the star. The energy scale of the explosion and the terminal velocity of the gas can be much larger than those in conventional supernovae. If the star unbinds before the merger, it would be hard for enough gas to remain near the holes at the merger to produce a gamma-ray burst, and this consideration should be taken into account when models are proposed for electromagnetic counterparts to the coalescence of two stellar-mass black holes. We find that only when the two black holes form very close to the centre can the star certainly avoid destruction. In that case, dynamical friction can make the black holes coalesce faster than they would in vacuum, which leads to a modification of the gravitational waveform that is potentially observable by advanced LIGO.

  2. OpenGL Insights

    CERN Document Server

    Cozzi, Patrick


    Get Real-World Insight from Experienced Professionals in the OpenGL Community With OpenGL, OpenGL ES, and WebGL, real-time rendering is becoming available everywhere, from AAA games to mobile phones to web pages. Assembling contributions from experienced developers, vendors, researchers, and educators, OpenGL Insights presents real-world techniques for intermediate and advanced OpenGL, OpenGL ES, and WebGL developers. Go Beyond the Basics The book thoroughly covers a range of topics, including OpenGL 4.2 and recent extensions. It explains how to optimize for mobile devices, explores the design

  3. Electromagnetic Compatibility (EMC) and Noise Background Testing for Double Chooz PMT System

    Energy Technology Data Exchange (ETDEWEB)

    Cepero, J. R.; Encabo Fernandez, F. J.; Pepe, I.; Verdugo, A.


    The Double Chooz PMT system is a HV/signal splitter. In this report is presented an electromagnetic compatibility and background noise testing for the Double Chooz PMT system. It was possible to proceed the EMC testing on different grounding configurations of PMT splitter due to its special PCB design, endowed of jumping points and a metal box ground electrode. (Author)

  4. A tunable acoustic metamaterial with double-negativity driven by electromagnets. (United States)

    Chen, Zhe; Xue, Cheng; Fan, Li; Zhang, Shu-Yi; Li, Xiao-Juan; Zhang, Hui; Ding, Jin


    With the advance of the research on acoustic metamaterials, the limits of passive metamaterials have been observed, which prompts the studies concerning actively tunable metamaterials with adjustable characteristic frequency bands. In this work, we present a tunable acoustic metamaterial with double-negativity composed of periodical membranes and side holes, in which the double-negativity pass band can be controlled by an external direct-current voltage. The tension and stiffness of the periodically arranged membranes are actively controlled by electromagnets producing additional stresses, and thus, the transmission and phase velocity of the metamaterial can be adjusted by the driving voltage of the electromagnets. It is demonstrated that a tiny direct-current voltage of 6V can arise a shift of double-negativity pass band by 40% bandwidth, which exhibits that it is an easily controlled and highly tunable acoustic metamaterial, and furthermore, the metamaterial marginally causes electromagnetic interference to the surroundings.

  5. Electromagnetics

    CERN Document Server

    Rothwell, Edward J


    Introductory concepts Notation, conventions, and symbology The field concept of electromagneticsThe sources of the electromagnetic field Problems Maxwell's theory of electromagnetism The postulate Maxwell's equations in moving frames The Maxwell-Boffi equations Large-scale form of Maxwell's equationsThe nature of the four field quantities Maxwell's equations with magnetic sources Boundary (jump) conditions Fundamental theorems The wave nature of the electromagnetic field ProblemsThe static electromagnetic field Static fields and steady currents ElectrostaticsMagnetostatics Static field theorem

  6. Analog of electromagnetically induced transparency at terahertz frequency based on a bilayer-double-H-metamaterial (United States)

    Wang, Yue’e.; Li, Zhi; Hu, Fangrong


    We designed a bilayer-double-H-metamaterials (BDHM) composed of two layers of metal and two layers of dielectric to analog a spectral response of electromagnetically induced transparency (EIT) at terahertz frequency. By changing the incident angle, the BDHM exhibits an EIT-like spectral response. The tunable spectral performances and modulation mechanism of the transparent peak are theoretically investigated using full-wave electromagnetic simulation software. The physical mechanism of the EIT-like effect is based on the constructive and destructive interference between the induced electrical dipoles. Our work provides a new way to realize the EIT-like effect only by changing the incident angles of the metamaterials. The potential applications include tunable filters, sensors, attenuators, switches, and so on.

  7. Electromagnetic properties of inner double walled carbon nanotubes investigated by nuclear magnetic resonance

    KAUST Repository

    Bouhrara, M.


    The nuclear magnetic resonance (NMR) analytical technique was used to investigate the double walled carbon nanotubes (DWNTs) electromagnetic properties of inner walls. The local magnetic and electronic properties of inner nanotubes in DWNTs were analyzed using 25% 13C enriched C 60 by which the effect of dipolar coupling could be minimized. The diamagnetic shielding was determined due to the ring currents on outer nanotubes in DWNTs. The NMR chemical shift anisotropy (CSA) spectra and spin-lattice relaxation studies reveal the metallic properties of the inner nanotubes with a signature of the spin-gap opening below 70 K.

  8. Electromagnetic Properties of Inner Double Walled Carbon Nanotubes Investigated by Nuclear Magnetic Resonance

    Directory of Open Access Journals (Sweden)

    M. Bouhrara


    Full Text Available The nuclear magnetic resonance (NMR analytical technique was used to investigate the double walled carbon nanotubes (DWNTs electromagnetic properties of inner walls. The local magnetic and electronic properties of inner nanotubes in DWNTs were analyzed using 25% 13C enriched C60 by which the effect of dipolar coupling could be minimized. The diamagnetic shielding was determined due to the ring currents on outer nanotubes in DWNTs. The NMR chemical shift anisotropy (CSA spectra and spin-lattice relaxation studies reveal the metallic properties of the inner nanotubes with a signature of the spin-gap opening below 70 K.

  9. Analogue of electromagnetically induced absorption with double absorption windows in a plasmonic system.

    Directory of Open Access Journals (Sweden)

    Nianfa Zhong

    Full Text Available We report the observation of an analog of double electromagnetically induced absorption (EIA in a plasmonic system consisting of two disk resonators side-coupled to a discrete metal-insulator-metal (MIM waveguide. The finite-difference time-domain (FDTD simulation calculations show that two absorption windows are obtained and can be easily tuned by adjusting the parameters of the two resonance cavities. The consistence between the coupled-model theory and FDTD simulation results verify the feasibility of the proposed system. Since the scheme is easy to be fabricated, our proposed configuration may thus be applied to narrow-band filtering, absorptive switching, and absorber applications.

  10. Model of the double-rotor induction motor in terms of electromagnetic differential

    Directory of Open Access Journals (Sweden)

    Adamczyk Dominik


    Full Text Available The paper presents a concept, a construction, a circuit model and experimental results of the double-rotor induction motor. This type of a motor is to be implemented in the concept of the electromagnetic differential. At the same time it should fulfill the function of differential mechanism and the vehicle drive. One of the motor shafts is coupled to the direction changing mechanical transmission. The windings of the external rotor are powered by slip rings and brushes. The inner rotor has the squirrel-cage windings. The circuit model parameters were calculated based on the 7.5 kW real single-rotor induction motor (2p = 4. Experimental verification of the model was based on comparison between the mentioned single-rotor motor and double-rotor model with the outer rotor blocked. The presented results showed relatively good compliance between the model and real motor.

  11. OpenGL development cookbook

    CERN Document Server

    Movania, Muhammad Mobeen


    The book is written in a Cookbook format with practical recipes aimed at helping you exploit OpenGL to its full potential.This book is targeted towards intermediate OpenGL programmers. However, those who are new to OpenGL and know an alternate API like DirectX might also find these recipes useful to create OpenGL animations.

  12. Large Eddy Simulations of Double-Ruler Electromagnetic Field Effect on Transient Flow During Continuous Casting (United States)

    Singh, Ramnik; Thomas, Brian G.; Vanka, Surya P.


    Transient flow during nominally steady conditions is responsible for many intermittent defects during the continuous casting of steel. The double-ruler electromagnetic field configuration, or "FC-Mold EMBr," is popular in commercial slab casting as it provides independent control of the applied static field near the jet and free surface regions of the mold. In the current study, transient flow in a typical commercial caster is simulated in the absence and in the presence of a double-ruler magnetic field, with rulers of equal strengths. Large eddy simulations with the in-house code CU-FLOW resolve the important transient behavior, using grids of over five million cells with a fast parallel solver. In the absence of a magnetic field, a double-roll pattern is observed, with transient unbalanced behavior, high surface velocities (~0.5 m/s), surface vortex formation, and very large surface-level fluctuations (~±12 mm). Applying the magnetic field suppresses the unbalanced behavior, producing a more complex mold flow pattern, but with much lower surface velocities (~0.1 m/s), and a flat surface level with small level fluctuations (<±1 mm). Nail board measurements taken at this commercial caster, in the absence of the field, matched reasonably well with the calculated results, both quantitatively and qualitatively.

  13. A Double-Negative Metamaterial-Inspired Mobile Wireless Antenna for Electromagnetic Absorption Reduction. (United States)

    Alam, Touhidul; Faruque, Mohammad Rashed Iqbal; Islam, Mohammad Tariqul


    A double-negative metamaterial-inspired antenna is presented for mobile wireless applications. The antenna consists of a semi-circular radiating patch and a 3 × 4 hexagonal shaped metamaterial unit cell array in the ground plane. The antenna is fed with a 50 Ω microstrip feed line. The electric dimensions of the proposed antenna are 0.20λ × 0.26λ × 0.004λ, at the low-end frequency. The proposed antenna achieves a -10 dB impedance with a bandwidth of 2.29 GHz at the lower band and 1.28 GHz at the upper band and can operate for most of the mobile applications such as upper GSM bands, WiMAX, Bluetooth, and wireless local area network (WLAN) frequency bands. The focused novelties of the proposed antenna are its small size, multi-standard operating bands, and electromagnetic absorption reduction at all the operating frequencies using the double-negative metamaterial ground plane.

  14. Polarized linewidth-controllable double-trapping electromagnetically induced transparency spectra in a resonant plasmon nanocavity. (United States)

    Wang, Luojia; Gu, Ying; Chen, Hongyi; Zhang, Jia-Yu; Cui, Yiping; Gerardot, Brian D; Gong, Qihuang


    Surface plasmons with ultrasmall optical mode volume and strong near field enhancement can be used to realize nanoscale light-matter interaction. Combining surface plasmons with the quantum system provides the possibility of nanoscale realization of important quantum optical phenomena, including the electromagnetically induced transparency (EIT), which has many applications in nonlinear quantum optics and quantum information processing. Here, using a custom-designed resonant plasmon nanocavity, we demonstrate polarized position-dependent linewidth-controllable EIT spectra at the nanoscale. We analytically obtain the double coherent population trapping conditions in a double-Λ quantum system with crossing damping, which give two transparent points in the EIT spectra. The linewidths of the three peaks are extremely sensitive to the level spacing of the excited states, the Rabi frequencies and detunings of pump fields, and the Purcell factors. In particular the linewidth of the central peak is exceptionally narrow. The hybrid system may have potential applications in ultra-compact plasmon-quantum devices.

  15. Electromagnetic Analysis and Design of Switched Reluctance Double-Rotor Machine for Hybrid Electric Vehicles

    Directory of Open Access Journals (Sweden)

    Shouliang Han


    Full Text Available The double-rotor machine is a kind of multiple input and output electromechanical energy transducer with two electrical ports and two mechanical ports, which is an ideal transmission system for hybrid electric vehicles and has a series of advantages such as integration of power and energy, high efficiency and compaction. In this paper, a switched reluctance double-rotor machine (SRDRM is proposed for hybrid electric vehicles, while no conductor or PM in the middle rotor. This machine not only inherits the merits of switched reluctance machine, such as simple salient rotor structure, high reliability and wide speed range, but also can avoid the outer rotor’s cooling problem effectively. By using an equivalent magnetic circuit model, the function of middle rotor yoke is analyzed. Electromagnetic analyses of the SRDRM are performed with analytical calculations and 2-D finite element methods, including the effects of main parameters on performance. Finally, a 4.4 kW prototype machine is designed and manufactured, and the tests are performed, which validate the proposed design method.

  16. Computation of Electromagnetic Torque in a Double Rotor Switched Reluctance Motor Using Flux Tube Methods

    Directory of Open Access Journals (Sweden)

    Mohammad Hamiruce Marhaban


    Full Text Available With their highly robust nature and simple design, switched reluctance machines are finding their way into numerous modern day applications. However, they produce oscillatory torque that generates torque ripple and mechanical vibrations. A double rotor structure to maximize the flux linkage and thereby increase the torque generating capability is proposed. As the machine operates close to saturation, the torque computation depends heavily on the energy conversion as the rotor rolls over the stator for a fixed pole pitch. The flux linkage characteristics are highly non-linear, hence estimation of the magnetic and mechanical parameters is extremely cumbersome. Magnetic circuit analysis by interpretation of the number of flux tubes using integration techniques at different positions of the machine to develop the flux linkage characteristics of the double rotor structure is presented. Computation of the inductances during the movement of rotor from unaligned to aligned is crucial in determining the generated torque. Relevant equations of calculations for inductance and flux linkages in the aligned, partially aligned and unaligned positions are computed. The partially aligned computation is based on the average on two intermediate positions, namely the 1/4th aligned and 3/4th aligned conditions. The static torque characteristics based on the energy conversion principles are used to compute the torque value. Results from simulation and experiments used for performance evaluation of the proposed flux tube analysis for computation of the electro-magnetic torque are presented.

  17. The effect of electromagnetic shielding on phantom limb pain: A placebo-controlled double-blind crossover trial. (United States)

    Fisher, Keren; Oliver, Sarah; Sedki, Imad; Hanspal, Rajiv


    Environmental electromagnetic fields influence biological systems. Evidence suggests these have a role in the experience of phantom limb pain in patients with amputations. This article followed a previous study to investigate the effect of electromagnetic field shielding with a specially designed prosthetic liner. Randomised placebo-controlled double-blind crossover trial. Twenty suitable participants with transtibial amputations, phantom pain at least 1 year with no other treatable cause or pathology were requested to record daily pain, well-being, activity and hours of prosthetic use on pre-printed diary sheets. These were issued for three 2-week periods (baseline, electromagnetic shielding (verum) and visually identical placebo liners - randomly allocated). Thirty-three per cent of the recruited participants were unable to complete the trial. The resulting N was therefore smaller than was necessary for adequate power. The remaining data showed that maximum pain and well-being were improved from baseline under verum but not placebo. More participants improved on all variables with verum than placebo. Electromagnetic field shielding produced beneficial effects in those participants who could tolerate the liner. It is suggested that this might be due to protection of vulnerable nerve endings from nociceptive effects of environmental electromagnetic fields. Electromagnetic field shielding with a suitable limb/prosthesis interface can be considered a useful technique to improve pain and well-being in patients with phantom limb pain. © The International Society for Prosthetics and Orthotics 2015.

  18. Electromagnetism

    CERN Document Server

    Grant, Ian S


    The Manchester Physics Series General Editors: D. J. Sandiford; F. Mandl; A. C. Phillips Department of Physics and Astronomy, University of Manchester Properties of Matter B. H. Flowers and E. Mendoza Optics Second Edition F. G. Smith and J. H. Thomson Statistical Physics Second Edition F. Mandl Electromagnetism Second Edition I. S. Grant and W. R. Phillips Statistics R. J. Barlow Solid State Physics Second Edition J. R. Hook and H. E. Hall Quantum Mechanics F. Mandl Particle Physics Second Edition B. R. Martin and G. Shaw the Physics of Stars Second Edition A. C. Phillips Computing for Scient

  19. Immunization with a Double-Mutant (R192G/L211A) of the Heat-Labile Enterotoxin of Escherichia coli Offers Partial Protection against Campylobacter jejuni in an Adult Mouse Intestinal Colonization Model. (United States)

    Albert, M John; Haridas, Shilpa; Ebenezer, Mathew; Raghupathy, Raj; Khan, Islam


    We have previously shown that antibodies to cholera toxin (CT) reacted with the major outer membrane proteins (MOMPs) from Campylobacter jejuni strains on Western blot. Further, oral immunization with CT significantly protected against challenge with C. jejuni in an adult mouse colonization model of infection. CT and the heat-labile enterotoxin (LT) of enterotoxigenic Escherichia coli are structurally and functionally related. LT and its mutants including the double-mutant LT (R192G/L211A) (dmLT), are powerful mucosal adjuvants. Unlike LT which is reactogenic, dmLT has been shown to be safe for human use. In the current study, we determined whether rabbit anti-dmLT antibodies reacted with MOMPs from C. jejuni strains and whether immunization with dmLT would afford protection against C. jejuni. On Western blot, the MOMPs from C. jejuni 48 (Penner serotype O:19), C. jejuni 75 (O:3) and C. jejuni 111 (O:1,44) were probed with rabbit antibodies to dmLT or LT-E112K (a non-toxic LT mutant), which showed a lack of reaction. Adult BALB/c mice were orally immunized with dmLT and orally challenged with C. jejuni 48 or 111. Protection from colonization with the challenge bacteria was studied by enumerating Campylobacter colonies in feces daily for 9 days. Vaccination produced robust serum and stool antibody responses to dmLT and no antibody responses to C. jejuni MOMP. Vaccinated mice showed reduced colonization and excretion of both challenge strains compared to control mice. However, the differences were not statistically significant. The protective efficacy of the dmLT vaccine varied from 9.1% to 54.5%. The lack of cross-reaction between the MOMP and dmLT suggests that protection is not mediated by cross-reacting antibodies, but may be due to activation of innate immunity. As dmLT is safe for humans, it could be incorporated into a C. jejuni vaccine to enhance its efficacy.

  20. Immunization with a Double-Mutant (R192G/L211A of the Heat-Labile Enterotoxin of Escherichia coli Offers Partial Protection against Campylobacter jejuni in an Adult Mouse Intestinal Colonization Model.

    Directory of Open Access Journals (Sweden)

    M John Albert

    Full Text Available We have previously shown that antibodies to cholera toxin (CT reacted with the major outer membrane proteins (MOMPs from Campylobacter jejuni strains on Western blot. Further, oral immunization with CT significantly protected against challenge with C. jejuni in an adult mouse colonization model of infection. CT and the heat-labile enterotoxin (LT of enterotoxigenic Escherichia coli are structurally and functionally related. LT and its mutants including the double-mutant LT (R192G/L211A (dmLT, are powerful mucosal adjuvants. Unlike LT which is reactogenic, dmLT has been shown to be safe for human use. In the current study, we determined whether rabbit anti-dmLT antibodies reacted with MOMPs from C. jejuni strains and whether immunization with dmLT would afford protection against C. jejuni. On Western blot, the MOMPs from C. jejuni 48 (Penner serotype O:19, C. jejuni 75 (O:3 and C. jejuni 111 (O:1,44 were probed with rabbit antibodies to dmLT or LT-E112K (a non-toxic LT mutant, which showed a lack of reaction. Adult BALB/c mice were orally immunized with dmLT and orally challenged with C. jejuni 48 or 111. Protection from colonization with the challenge bacteria was studied by enumerating Campylobacter colonies in feces daily for 9 days. Vaccination produced robust serum and stool antibody responses to dmLT and no antibody responses to C. jejuni MOMP. Vaccinated mice showed reduced colonization and excretion of both challenge strains compared to control mice. However, the differences were not statistically significant. The protective efficacy of the dmLT vaccine varied from 9.1% to 54.5%. The lack of cross-reaction between the MOMP and dmLT suggests that protection is not mediated by cross-reacting antibodies, but may be due to activation of innate immunity. As dmLT is safe for humans, it could be incorporated into a C. jejuni vaccine to enhance its efficacy.

  1. Double graphene-layer structures for adaptive devices (United States)

    Mitin, V.; Ryzhii, V.; Otsuji, T.; Ryzhii, M.; Shur, M. S.


    Among different carbon materials (diamond, graphite, fullerene, carbon nanotubes), graphene and more complex graphene-based structures attracted a considerable attention. The gapless energy spectrum of graphene implies that graphene can absorb and emit photons with rather low energies corresponding to terahertz (THz) and infrared (IR) ranges of the electromagnetic spectrum. In this presentation, the discussion is focused on the double-graphene-layer (double-GL) structures. In these structures, GLs are separated by a barrier layer (Boron Nitride, Silicon Carbide, and so on). Applying voltage between GLs, one can realize the situation when one GL is filled with electrons while the other is filled with holes. The variation of the applied voltage leads to the variations of the Fermi energies and, hence, to the change of the interband and intraband absorption of electromagnetic radiation and to the variation of the tunneling current. The plasma oscillations in double-GL structures exhibit interesting features. This is mainly because each GL serves as the gate for the other GL. The spectrum of the plasma oscillations in the double-GL structures falls into the terahertz range (THz) of frequencies and can be effectively controlled by the bias voltage. In this paper, we discuss the effects of the excitation of the plasma oscillations by incoming THz radiation and by optical radiation of two lasers with close frequencies as well as negative differential conductivity of the N-type and Z-type. These effects can be used in resonant THz detectors and THz photomixers. The models of devices based on double-GL structures as well as their characteristics are discussed.

  2. Treatment of knee osteoarthritis with pulsed electromagnetic fields: a randomized, double-blind, placebo-controlled study

    DEFF Research Database (Denmark)

    Thamsborg, G; Florescu, A; Oturai, P


    OBJECTIVE: The investigation aimed at determining the effectiveness of pulsed electromagnetic fields (PEMF) in the treatment of osteoarthritis (OA) of the knee by conducting a randomized, double-blind, placebo-controlled clinical trial. DESIGN: The trial consisted of 2h daily treatment 5 days per...... (WOMAC) questionnaire. RESULTS: Within group analysis revealed a significant improvement in ADL, stiffness and pain in the PEMF-treated group at all evaluations. In the control group there was no effect on ADL after 2 weeks and a weak significance was seen after 6 and 12 weeks. Significant effects were...... years using between group analysis revealed a significant improvement for stiffness on treated knee after 2 weeks, but this effect was not observed for ADL and pain. CONCLUSIONS: Applying between group analysis we were unable to demonstrate a beneficial symptomatic effect of PEMF in the treatment...

  3. Double-sided electromagnetic pump with controllable normal force for rapid solidification of liquid metals (United States)

    Kuznetsov, Stephen B.


    A system for casting liquid metals is provided with an electromagnetic pump which includes a pair of primary blocks each having a polyphase winding and being positioned to form a gap through which a movable conductive heat sink passes. A solidifying liquid metal sheet is deposited on the heat sink and the heat sink and sheet are held in compression by forces produced as a result of current flow through the polyphase windings. Shaded-pole interaction between the primary windings, heat sink and solidifying strip produce transverse forces which act to center the strip on the heat sink.

  4. CT scan-evaluated outcome of pulsed electromagnetic fields in the treatment of acute scaphoid fractures: a randomised, multicentre, double-blind, placebo-controlled trial

    NARCIS (Netherlands)

    Hannemann, P.F.; van Wezenbeek, M.R.; Kolkman, K.A.; Twiss, E.L.; Berghmans, C.H.; Dirven, P.A.; Brink, P.R.; Poeze, M.


    We hypothesised that the use of pulsed electromagnetic field (PEMF) bone growth stimulation in acute scaphoid fractures would significantly shorten the time to union and reduce the number of nonunions in a randomised, double-blind, placebo-controlled multicentre trial. A total of 102 patients (78

  5. First results of low frequency electromagnetic wave detector of TC-2/Double Star program

    Directory of Open Access Journals (Sweden)

    J. B. Cao


    Full Text Available LFEW is a low frequency electromagnetic wave detector mounted on TC-2, which can measure the magnetic fluctuation of low frequency electromagnetic waves. The frequency range is 8 Hz to 10 kHz. LFEW comprises a boom-mounted, three-axis search coil magnetometer, a preamplifier and an electronics box that houses a Digital Spectrum Analyzer. LFEW was calibrated at Chambon-la-Forêt in France. The ground calibration results show that the performance of LFEW is similar to that of STAFF on TC-1. The first results of LFEW show that it works normally on board, and that the AC magnetic interference of the satellite platform is very small. In the plasmasphere, LFEW observed the ion cyclotron waves. During the geomagnetic storm on 8 November 2004, LFEW observed a wave burst associated with the oxygen ion cyclotron waves. This observation shows that during geomagnetic storms, the oxygen ions are very active in the inner magnetosphere. Outside the plasmasphere, LFEW observed the chorus on 3 November 2004. LFEW also observed the plasmaspheric hiss and mid-latitude hiss both in the Southern Hemisphere and Northern Hemisphere on 8 November 2004. The hiss in the Southern Hemisphere may be the reflected waves of the hiss in the Northern Hemisphere.

  6. Electromagnetic radiation and scattering from small canonical structures of double-negative metamaterials

    DEFF Research Database (Denmark)

    Arslanagic, Samel


    aspects associated with DNG materials, and was subsequently extended to investigations of the radiation and scattering from two- and three-dimensional (2D and 3D) MTM-based canonical problems in electromagnetic theory. As to the theoretical aspects of DNG materials, the sign, or more generally the branch......, of the free-space wavelength. The enhancement of e.g., the total radiated power, as compared to the power radiated by the respective sources alone in free space, is found to be of the order of 55 dB, for cylindrical, and 93 dB, for spherical structures. These resonant effects, not present in the corresponding...... investigated. It is demonstrated that the resonant effects of the electrically small MTM-based structures, and thus the resulting enhancements of e.g., the total radiated power, are diminished as the losses are included, while being confined, but still present, to very narrow bands of frequency upon inclusion...

  7. Remote Effects of Electromagnetic Millimeter Waves on Experimentally Induced Cold Pain: A Double-Blinded Crossover Investigation in Healthy Volunteers. (United States)

    Partyla, Tomasz; Hacker, Henriette; Edinger, Hardy; Leutzow, Bianca; Lange, Joern; Usichenko, Taras


    The hypoalgesic effect of electromagnetic millimeter waves (MW) is well studied in animal model; however, the results of human research are controversial. The aim of this study was to evaluate the effects of various frequency ranges of MW on hypoalgesia using the cold pressor test (CPT). Experimental pain was induced using standardized CPT protocols in 20 healthy male volunteers. The skin of the lower part of sternum was exposed to MW with a frequency of 42.25 GHz (active generator); MW within 50-75 GHz frequency range (noise generator); or an inactive MW device (placebo generator) in a random crossover double-blinded manner. Pain threshold, measured using the CPT, was the primary outcome. Other CPT parameters, heart rate, blood pressure, incidence of subjective sensations (paresthesia) during exposure, as well as quality of volunteers' blinding were also recorded. The end points of the condition with exposure to 42.25 GHz, were compared with baseline; exposure to noise 50-75 GHz; and placebo generators. Pain threshold increased during exposure to the 42.25 GHz generator when compared with baseline: median difference (MD), 1.97 seconds (95% confidence interval [CI], 0.35-3.73) and noise generator: MD, 1.27 seconds (95% CI, 0.05-2.33) but not compared with the placebo generator. Time to onset of cold and increasing pain sensations as well as diastolic blood pressure increased under the exposure to the 42.25 GHz generator when compared with baseline and noise generator. Other outcome measures were comparable among the study conditions. We were able to partially confirm the previously suggested hypoalgesic effects of low-intensity electromagnetic MW. However, the effect was indistinguishable from the placebo condition in our investigation.

  8. Pulsed Electromagnetic Fields in the treatment of fresh scaphoid fractures. A multicenter, prospective, double blind, placebo controlled, randomized trial

    Directory of Open Access Journals (Sweden)

    Poeze Martijn


    Full Text Available Abstract Background The scaphoid bone is the most commonly fractured of the carpal bones. In the Netherlands 90% of all carpal fractures is a fracture of the scaphoid bone. The scaphoid has an essential role in functionality of the wrist, acting as a pivot. Complications in healing can result in poor functional outcome. The scaphoid fracture is a troublesome fracture and failure of treatment can result in avascular necrosis (up to 40%, non-union (5-21% and early osteo-arthritis (up to 32% which may seriously impair wrist function. Impaired consolidation of scaphoid fractures results in longer immobilization and more days lost at work with significant psychosocial and financial consequences. Initially Pulsed Electromagnetic Fields was used in the treatment of tibial pseudoarthrosis and non-union. More recently there is evidence that physical forces can also be used in the treatment of fresh fractures, showing accelerated healing by 30% and 71% reduction in nonunion within 12 weeks after initiation of therapy. Until now no double blind randomized, placebo controlled trial has been conducted to investigate the effect of this treatment on the healing of fresh fractures of the scaphoid. Methods/Design This is a multi center, prospective, double blind, placebo controlled, randomized trial. Study population consists of all patients with unilateral acute scaphoid fracture. Pregnant women, patients having a life supporting implanted electronic device, patients with additional fractures of wrist, carpal or metacarpal bones and pre-existing impairment in wrist function are excluded. The scaphoid fracture is diagnosed by a combination of physical and radiographic examination (CT-scanning. Proven scaphoid fractures are treated with cast immobilization and a small Pulsed Electromagnetic Fields bone growth stimulating device placed on the cast. Half of the devices will be disabled at random in the factory. Study parameters are clinical consolidation

  9. Double-layer Electromagnetic Wave Absorber Based on Carbon Nanotubes Doped with La(NO33 and Fe3O4 Nanoparticles

    Directory of Open Access Journals (Sweden)

    Cuiling HOU


    Full Text Available Double-layer structure absorbing materials based on the impedance matching principle and transmission line theory can effectively improve the electromagnetic wave absorbing properties. In this paper, the electro-magnetic wave absorbing properties of double-layer absorbers (2 mm thickness, where multiwall carbon nanotube (MWCNT-La(NO33/polyvinyl chloride (PVC and MWCNT-Fe3O4/PVC composites had been taken turns as the absorption layer and matching layer, were investigated in 2 – 18 GHz range. The absorbing properties of single- and double-layer structure and different each-layer thickness with two types of combinations were compared. The results showed that the design of double-layer structure for composites could effectively broaden the absorption frequency area, and increase the absorption intensity. When MWCNT-La(NO33/PVC composite were used as absorption layers with 0.6 mm thickness, the absorption bandwidth (< – 15 dB or > 97 % of double-layer composite was the widest, reaching a maximum of about 3.36 GHz, and the absorption peak value was also the lowest about – 46.02 dB at 16.24 GHz.DOI:

  10. Electromagnetic and optical characteristics of Nb5+-doped double-crossover and salmon DNA thin films (United States)

    Babu Mitta, Sekhar; Reddy Dugasani, Sreekantha; Jung, Soon-Gil; Vellampatti, Srivithya; Park, Tuson; Park, Sung Ha


    We report the fabrication and physical characteristics of niobium ion (Nb5+)-doped double-crossover DNA (DX-DNA) and salmon DNA (SDNA) thin films. Different concentrations of Nb5+ ([Nb5+]) are coordinated into the DNA molecules, and the thin films are fabricated via substrate-assisted growth (DX-DNA) and drop-casting (SDNA) on oxygen plasma treated substrates. We conducted atomic force microscopy to estimate the optimum concentration of Nb5+ ([Nb5+]O = 0.08 mM) in Nb5+-doped DX-DNA thin films, up to which the DX-DNA lattices maintain their structures without deformation. X-ray photoelectron spectroscopy (XPS) was performed to probe the chemical nature of the intercalated Nb5+ in the SDNA thin films. The change in peak intensities and the shift in binding energy were witnessed in XPS spectra to explicate the binding and charge transfer mechanisms between Nb5+ and SDNA molecules. UV-visible, Raman, and photoluminescence (PL) spectra were measured to determine the optical properties and thus investigate the binding modes, Nb5+ coordination sites in Nb5+-doped SDNA thin films, and energy transfer mechanisms, respectively. As [Nb5+] increases, the absorbance peak intensities monotonically increase until ˜[Nb5+]O and then decrease. However, from the Raman measurements, the peak intensities gradually decrease with an increase in [Nb5+] to reveal the binding mechanism and binding sites of metal ions in the SDNA molecules. From the PL, we observe the emission intensities to reduce them at up to ˜[Nb5+]O and then increase after that, expecting the energy transfer between the Nb5+ and SDNA molecules. The current-voltage measurement shows a significant increase in the current observed as [Nb5+] increases in the SDNA thin films when compared to that of pristine SDNA thin films. Finally, we investigate the temperature dependent magnetization in which the Nb5+-doped SDNA thin films reveal weak ferromagnetism due to the existence of tiny magnetic dipoles in the Nb5+-doped SDNA

  11. Oxalis deppei : Glücksklee (Oxalidaceae)


    Buch, Corinne; Steinecke, Hilke


    Als Glück bringendes Mitbringsel erfreut sich der Glücksklee (Oxalis deppei = O. tetraphylla) vor allem zum Jahreswechsel großer Beliebtheit. Neben weiteren, dem (Aber-)Glauben nach Glück bringenden Symbolen wie Schornsteinfeger, Schwein, Hufeisen und Fliegenpilz sind viergeteilte Kleeblätter ein häufiges Motiv auf Silvesterartikeln. Botanisch gehört er allerdings nicht zur Gattung "Klee" (Trifolium, Fabaceae, Schmetterlingsblütler), sondern zur Gattung Sauerklee (Oxalis, Oxalidaceae, Sauerkl...

  12. Neoplasias das glândulas salivares


    Achando, Rita Isabel Sanches Ambrósio


    Trabalho final do 5º ano com vista à atribuição do grau de mestre (área científica de patologia) no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra. cavidade oral recebe a secreção da saliva de numerosas glândulas que podem classificar-se, quanto ao seu tamanho, em duas categorias: glândulas salivares principais ou major (parótida, submandibular e sublingual) e glândulas salivares acessórias ou minor (labi...

  13. OpenGL 4 shading language cookbook

    CERN Document Server

    Wolff, David


    OpenGL Shading Language 4 Cookbook is a hands-on guide that gets straight to the point - actually creating graphics, instead of just theoretical learning. Each recipe is specifically tailored to satisfy your appetite for producing real-time 3-D graphics using the latest GLSL specification.This book is for OpenGL programmers looking to use the modern features of GLSL 4 to create real-time, three-dimensional graphics. Familiarity with OpenGL programming, along with the typical 3D coordinate systems, projections, and transformations is assumed. It can also be useful for experienced GLSL programme

  14. Effects of personalised exposure on self-rated electromagnetic hypersensitivity and sensibility - A double-blind randomised controlled trial

    NARCIS (Netherlands)

    van Moorselaar, Imke; Slottje, Pauline|info:eu-repo/dai/nl/299345351; Heller, Pia; van Strien, Rob; Kromhout, Hans|info:eu-repo/dai/nl/074385224; Murbach, Manuel; Kuster, Niels; Vermeulen, Roel|info:eu-repo/dai/nl/216532620; Huss, Anke|info:eu-repo/dai/nl/331385880

    BACKGROUND: Previous provocation experiments with persons reporting electromagnetic hypersensitivity (EHS) have been criticised because EHS persons were obliged to travel to study locations (seen as stressful), and that they were unable to select the type of signal they reported reacting to. In our

  15. The sensing characteristics based on electromagnetically-induced transparency-like response in double-sided stub and a nanodisk waveguide system (United States)

    Pang, Shaofang; Huo, Yiping; Hao, Limei; Sun, Kaigang; Wang, Yang-Junjie; Xie, You


    We propose a novel metal-insulator-metal (MIM) waveguide structure consisting of a stub and a double side-coupled nanodisk. Its electromagnetically-induced transparency (EIT)-like response and transmission properties are numerically investigated by the finite element method (FEM). Numerical simulation results show that the EIT-like phenomenon appears in the transmission spectra. The transparency window can not only be manipulated by changing the radius of the nanodisk and the height of the stub, but also appear redshifted with the increasing of the refractive index n. Furthermore, the MIM waveguide structure is easy to yield a high sensitivity of 1200 nm/RIU with a figure of merit about 2.2 × 104, which may be applied to nanosensors. These results would help us design the high-performance plasmonic devices based on the EIT-like response.

  16. Measurement of spatial and temporal evolution of electromagnetic fields in a 100 MHz plasma source using B dot and double dipole probes

    Energy Technology Data Exchange (ETDEWEB)

    Lane, Barton, E-mail:; Campbell, Colin; Sawada, Ikuo; Ventzek, Peter L. G., E-mail: [Tokyo Electron America, Inc., 2400 Grove Blvd., Austin, Texas 78741 (United States)


    Very high frequency plasma sources are often accompanied by plasma density nonuniformities associated with a standing-wave effect. Electron density measurements using a plasma absorption probe show density nonuniformities that can be larger than predicted by a standing wave model. These structures have been associated with harmonics of the electric fields in the plasma. The authors present the first time and phase-resolved measurements of the spatial structure of the electromagnetic waves in a 100 MHz plasma source using argon at 40 mTorr employing a B dot probe. The authors show that the harmonic structure is related to a current reversal and subsequent circulation that appears when the sheath collapses during the radio frequency cycle. The circulation is driven by inward traveling waves that are electromagnetic in nature, not plasma waves traveling at the electron thermal velocity. Double dipole probe measurements were used to validate the B dot probe electric field measurements derived from the time derivative of Β{sub θ} which is derived from the B dot probe signal.

  17. Greased Lightning (GL-10) Flight Testing Campaign (United States)

    Fredericks, William J.; McSwain, Robert G.; Beaton, Brian F.; Klassman, David W.; Theodore, Colin R.


    Greased Lightning (GL-10) is an aircraft configuration that combines the characteristics of a cruise efficient airplane with the ability to perform vertical takeoff and landing (VTOL). This aircraft has been designed, fabricated and flight tested at the small unmanned aerial system (UAS) scale. This technical memorandum will document the procedures and findings of the flight test experiments. The GL-10 design utilized two key technologies to enable this unique aircraft design; namely, distributed electric propulsion (DEP) and inexpensive closed loop controllers. These technologies enabled the flight of this inherently unstable aircraft. Overall it has been determined thru flight test that a design that leverages these new technologies can yield a useful VTOL cruise efficient aircraft.

  18. Warum macht Fliegen glücklich?

    Directory of Open Access Journals (Sweden)

    Gertrud Pfister


    Full Text Available Berufliche Orientierungen von Pilotinnen weckt große Erwartungen, die leider nur teilweise eingelöst werden. Es ermöglicht Einsichten in die Berufsbiographien von Pilotinnen und in das „Gendering“ des Berufsfelds, gibt aber auf zentrale Fragen, u.a. nach den Barrieren, die Frauen den Weg an die Spitze versperren, keine befriedigenden Antworten. So bleibt auch offen, warum Fliegen glücklich macht.

  19. O Contrato De Gláucon

    Directory of Open Access Journals (Sweden)

    Luiz Maurício Bentim da Rocha Menezes

    Full Text Available Resumo: O Livro II da República de Platão se inicia com um desafio de Gláucon para Sócrates, onde este deve provar que o homem justo é, de toda maneira, melhor do que o injusto. Para isso, pedirá que Sócrates defenda a justiça por si mesma e censure a injustiça. O discurso de Gláucon pode ser dividido em três partes, sendo a primeira dedicada à origem e à natureza da justiça; a segunda irá indicar a justiça como algo necessário, mas não como um bem; e a terceira, na qual ele irá tentar provar que a vida do injusto é melhor do que a do justo. Neste trabalho, iremos nos centrar em seu primeiro argumento e de que maneira Gláucon defende a justiça através de um contrato.

  20. Effect of shell permutation on electromagnetic properties of ZnFeO4/(PANI, SiO2) core/double-shell nanostructured disks (United States)

    Wang, Jiaheng; Or, Siu Wing; Leung, Chung Ming


    ZnFe2O4/PANI/SiO2 (ZPS) and ZnFe2O4/SiO2/PANI (ZSP) core/double-shell nanostructured disks comprising PANI conducting dielectric shell and SiO2 insulating dielectric shell on a disk-shaped ZnFe2O4 magnetic core are prepared to study the effect of shell permutation on their electromagnetic properties. The complex relative permittivity ( ɛ r = ɛr ' - j ɛr ″ ) and permeability ( μ r = μr ' - j μr ″ ) of ZPS and ZSP are measured, and the reflection loss (RL) is determined, together with the ZnFe2O4 core, in the 1-18 GHz range. ɛr ' and ɛr ″ in ZPS and ZSP are smaller than the core because of the induction of disordered dipolar polarizations at various interfaces involving the insulating SiO2 shell. Two obvious dielectric and magnetic abnormalities are observed in ZPS and ZSP. First, ɛr ″ is weakened in the dipolar polarization-rich ZPS when compared to the ZSP of relatively less dipolar polarization. Second, μr ' and μr ″ in ZPS become the largest in the 1.5-10.8 and 5.6-18 GHz ranges, respectively, while μr ″ in ZSP remains the lowest and changes to be negative in the 10-18 GHz range, among all samples. An electromagnetic energy transformation mechanism is proposed to explain the observed abnormalities and their effects on absorption.

  1. WebGL for Rosetta Science Planning (United States)

    Schmidt, Albrecht; Völk, Stefan; Grieger, Björn


    Rosetta is a mission of the European Space Agency (ESA) to rendez-vous with comet Churyumov-Gerasimenko in 2014. The trajectory and operations of the mission are particularly complex, have many free parameters and are novel to the community. To support science planning, communicate operational ideas and disseminate operational scenarios to the scientific community, the science ground segment makes use of Web-based visualisation technologies. Using the recent standard WebGL, static pages of time-dependent three-dimensional views of the spacecraft and the field-of-views of the instruments are generated, directly from the operational files. These can then be viewed in modern Web browsers for understanding or verification, be analysed and correlated with other studies. Variable timesteps make it possible to provide both overviews and detailed animated scenes. The technical challenges that are particular to Web-based environments include: (1) In traditional OpenGL, is much easier to compute needed data on demand since the visualisation runs natively on a usually quite powerful computer. In WebGL application, since requests for additional data have to be passed through a Web server, they are more complex and also require a more complex infrastructure. (2) The volume of data that can be kept in a browser environment is limited and has to be transferred over often slow network links. Thus, careful design and reduction of data is required. (3) Although browser support for WebGL has improved since the authors started using it, it is often not well supported on mobile and small devices. (4) Web browsers often only support limited end user interactions with a mouse or keyboards. While some of the challenges can be expected to become less important as technological progress continues, others seem to be more inherent to the approach. On the positive side, the authors' experiences include: (1) low threshold in the community to using the visualisations, (2), thus, cooperative use

  2. Incorporating modern OpenGL into computer graphics education. (United States)

    Reina, Guido; Muller, Thomas; Ertl, Thomas


    University of Stuttgart educators have updated three computer science courses to incorporate forward-compatible OpenGL. To help students, they developed an educational framework that abstracts some of modern OpenGL's difficult aspects.

  3. Transcranial pulsed electromagnetic fields for multiple chemical sensitivity: Study protocol for a randomized, double-blind, placebo-controlled trial

    DEFF Research Database (Denmark)

    Tran, Marie Thi Dao; Skovbjerg, Sine; Arendt-Nielsen, Lars


    a promising new treatment for refractory depression and can be targeted at the brain, thereby activating biochemical cell processes.Methods/Design: In a parallel, randomized, double-blind, placebo-controlled trial conducted at the Danish Research Centre for Chemical Sensitivities, the effects of PEMF in MCS...... follow-up according to a predefined timetable. The primary outcome will be a measurement of the impact of MCS on everyday life. The secondary outcomes will be measurements of MCS symptoms, psychological distress (stress, anxiety or depressive symptoms), capsaicin-induced secondary punctate hyperalgesia......, immunological markers in serum, and quality of life.Discussion: This trial will assess the effects of PEMF therapy for MCS. Currently, there is no treatment with a documented effect on MCS, and in terms of healthcare there is very little to offer these patients. There is thus a great need for well...

  4. Electromagnetic Waves

    DEFF Research Database (Denmark)

    This book is dedicated to various aspects of electromagnetic wave theory and its applications in science and technology. The covered topics include the fundamental physics of electromagnetic waves, theory of electromagnetic wave propagation and scattering, methods of computational analysis...

  5. Pulsed electromagnetic field and exercises in patients with shoulder impingement syndrome: a randomized, double-blind, placebo-controlled clinical trial. (United States)

    Galace de Freitas, Diego; Marcondes, Freddy Beretta; Monteiro, Renan Lima; Rosa, Sabrina Gonçalves; Maria de Moraes Barros Fucs, Patrícia; Fukuda, Thiago Yukio


    To evaluate the effects of pulsed electromagnetic field (PEMF) and exercises in reducing pain and improving function and muscle strength in patients with shoulder impingement syndrome (SIS). Double-blind, randomized controlled trial with a 3-month posttreatment follow-up. Outpatient rehabilitation of a public hospital. Patients (N=56) between 40 and 60 years of age, with a diagnosis of SIS, were randomly assigned to receive active PEMF (n=26; mean age, 50.1y) or placebo PEMF (n=30; mean age, 50.8y). After 3 weeks of active or placebo PEMF, both groups performed the same program of exercises that focused on shoulder strengthening. A visual analog scale, the University of California/Los Angeles shoulder rating scale, the Constant-Murley shoulder score, and handheld dynamometry for muscle strength were used as outcome measures at baseline (pretreatment), at 3 weeks (after active or placebo PEMF), at 9 weeks (postexercise), and at 3 months posttreatment. Patients in the active PEMF group had a higher level of function and less pain at all follow-up time frames compared with baseline (Pshoulder dynamometry, the active PEMF group had increased strength for lateral rotation at 9 weeks (Pshoulder strength in the placebo PEMF group (P>.05), as well as no significant differences (P>.05) for all outcome measures. The combination of PEMF and shoulder exercises is effective in improving function and muscle strength and decreasing pain in patients with SIS. However, these results should be carefully interpreted because of the lack of differences between groups. Copyright © 2014 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.

  6. Coupled seismic and electromagnetic wave propagation

    NARCIS (Netherlands)

    Schakel, M.D.


    Coupled seismic and electromagnetic wave propagation is studied theoretically and experimentally. This coupling arises because of the electrochemical double layer, which exists along the solid-grain/fluid-electrolyte boundaries of porous media. Within the double layer, charge is redistributed,

  7. Electromagnetic Waves


    Blok, H.; van den Berg, P.M.


    This book is dedicated to various aspects of electromagnetic wave theory and its applications in science and technology. The covered topics include the fundamental physics of electromagnetic waves, theory of electromagnetic wave propagation and scattering, methods of computational analysis, material characterization, electromagnetic properties of plasma, analysis and applications of periodic structures and waveguide components, etc.

  8. The Effect of Intraoperative Graft Coverage With Preserved Remnant Tissue on the Results of the Pivot-Shift Test After Anatomic Double-Bundle Anterior Cruciate Ligament Reconstruction: Quantitative Evaluations With an Electromagnetic Sensor System. (United States)

    Kitamura, Nobuto; Yasuda, Kazunori; Yokota, Masashi; Goto, Keiko; Wada, Susumu; Onodera, Jun; Kondo, Eiji


    Remnant tissue preservation may be important in improving graft healing after anterior cruciate ligament (ACL) reconstruction, but it has yet to be established whether remnant tissue preservation improves the control of pivot-shift laxity. The amount of ACL graft coverage with preserved remnant tissue improves the control of pivot-shift laxity, as qualitatively determined with an electromagnetic device. Cohort study; Level of evidence, 3. The 3-dimensional kinematics were evaluated intraoperatively using an electromagnetic sensor system in 38 patients at the time of anatomic double-bundle ACL reconstruction with remnant tissue preservation and again at a minimum of 12 months postoperatively. The magnitude of the peak coupled anterior tibial translation (pCAT) and the maximal acceleration of posterior translation (APT) during the pivot-shift test were evaluated. The degree of graft coverage by remnant tissue was determined arthroscopically at the end of surgery, which was evaluated quantitatively using a scoring system (0-9 points). The relationship between the values during the pivot-shift test and preoperative and intraoperative factors were assessed. The mean (±SD) side-to-side difference of the pCAT (ΔpCAT) was significantly ( P electromagnetic device. This improvement was significantly affected by the degree of intraoperative graft coverage with preserved remnant tissue.

  9. A systems approach reveals regulatory circuitry for Arabidopsis trichome initiation by the GL3 and GL1 selectors.

    Directory of Open Access Journals (Sweden)

    Kengo Morohashi


    Full Text Available Position-dependent cell fate determination and pattern formation are unique aspects of the development of plant structures. The establishment of single-celled leaf hairs (trichomes from pluripotent epidermal (protodermal cells in Arabidopsis provides a powerful system to determine the gene regulatory networks involved in cell fate determination. To obtain a holistic view of the regulatory events associated with the differentiation of Arabidopsis epidermal cells into trichomes, we combined expression and genome-wide location analyses (ChIP-chip on the trichome developmental selectors GLABRA3 (GL3 and GLABRA1 (GL1, encoding basic helix-loop-helix (bHLH and MYB transcription factors, respectively. Meta-analysis was used to integrate genome-wide expression results contrasting wild type and gl3 or gl1 mutants with changes in gene expression over time using inducible versions of GL3 and GL1. This resulted in the identification of a minimal set of genes associated with the differentiation of epidermal cells into trichomes. ChIP-chip experiments, complemented by the targeted examination of factors known to participate in trichome initiation or patterning, identified about 20 novel GL3/GL1 direct targets. In addition to genes involved in the control of gene expression, such as the transcription factors SCL8 and MYC1, we identified SIM (SIAMESE, encoding a cyclin-dependent kinase inhibitor, and RBR1 (RETINOBLASTOMA RELATED1, corresponding to a negative regulator of the cell cycle transcription factor E2F, as GL3/GL1 immediate targets, directly implicating these trichome regulators in the control of the endocycle. The expression of many of the identified GL3/GL1 direct targets was specific to very early stages of trichome initiation, suggesting that they participate in some of the earliest known processes associated with protodermal cell differentiation. By combining this knowledge with the analysis of genes associated with trichome formation, our results

  10. The clinical and radiological outcome of pulsed electromagnetic field treatment for acute scaphoid fractures: a randomised double-blind placebo-controlled multicentre trial

    NARCIS (Netherlands)

    Hannemann, P.F.; Gottgens, K.W.; Wely, B.J. van; Kolkman, K.A.; Werre, A.J.; Poeze, M.; Brink, P.R.


    The use of pulsed electromagnetic fields (PEMF) to stimulate bone growth has been recommended as an alternative to the surgical treatment of ununited scaphoid fractures, but has never been examined in acute fractures. We hypothesised that the use of PEMF in acute scaphoid fractures would accelerate

  11. The GL(1 vertical stroke 1)-symplectic fermion correspondence

    Energy Technology Data Exchange (ETDEWEB)

    Creutzig, Thomas; Roenne, Peter B.


    In this note we prove a correspondence between the Wess-Zumino-Novikov-Witten model of the Lie supergroup GL(1 vertical stroke 1) and a free model consisting of two scalars and a pair of symplectic fermions. This model was discussed earlier by LeClair. Vertex operators for the symplectic fermions include twist fields, and correlation functions of GL(1 vertical stroke 1) agree with the known results for the scalars and symplectic fermions. We perform a detailed study of boundary states for symplectic fermions and apply them to branes in GL(1 vertical stroke 1). This allows us to compute new amplitudes of strings stretching between branes of different types and confirming Cardy's condition. (orig.)

  12. Arterite temporal com comprometimento das glândulas salivares

    Directory of Open Access Journals (Sweden)

    Lineu C. Werneck


    Full Text Available E relatado um caso de arterite temporal em paciente com crises de cefaléia paroxística associadas a síndrome depressiva e, na última crise, a aumento de volume das glândulas salivares. Biopsia de artéria temporal superficial mostrou aspecto típico de arterite, com células gigantes mononucleadas. A cefalalgia e o aumento de volume das glândulas salivares regrediram mediante a administração de corticoesteróides.

  13. Electromagnetic Attraction. (United States)

    Milson, James L.


    Three activities involving electromagnetism are presented. Discussed are investigations involving the construction of an electromagnet, the effect of the number of turns of wire in the magnet, and the effect of the number of batteries in the circuit. Extension activities are suggested. (CW)

  14. Electromagnetic interactions

    CERN Document Server

    Bosanac, Slobodan Danko


    This book is devoted to theoretical methods used in the extreme circumstances of very strong electromagnetic fields. The development of high power lasers, ultrafast processes, manipulation of electromagnetic fields and the use of very fast charged particles interacting with other charges requires an adequate theoretical description. Because of the very strong electromagnetic field, traditional theoretical approaches, which have primarily a perturbative character, have to be replaced by descriptions going beyond them. In the book an extension of the semi-classical radiation theory and classical dynamics for particles is performed to analyze single charged atoms and dipoles submitted to electromagnetic pulses. Special attention is given to the important problem of field reaction and controlling dynamics of charges by an electromagnetic field.

  15. Branes in the GL(1|1) WZNW-model

    NARCIS (Netherlands)

    Creutzig, T.; Quella, T.; Schomerus, V.


    We initiate a systematic study of boundary conditions in conformal field theories with target space supersymmetry. The WZNW model on GL(1|1) is used as a prototypical example for which we find the complete set of maximally symmetric branes. This includes a unique brane of maximal super-dimension

  16. Astrocitoma de grado I en glándula pineal


    Iglesias Rozas, José Rafael, 1942-


    Tres imágenes de un astrocitoma de grado I situado en la glándula pineal de un paciente de 10 años. Three pictures of a grade I astrocytoma located in the pineal gland of a 10-year-old male patient.

  17. OpenGL ES 3.0 cookbook

    CERN Document Server

    Singh, Parminder


    If you are new to OpenGL ES or have some experience in 3D graphics, then this book will be extremely helpful in raising your expertise level from a novice to professional. The book implements more than 90 recipes to solve everyday challenges, helping you transition from a beginner to a professional.

  18. Birgit Steinbügl: Deutsch-englische Kollokationen

    African Journals Online (AJOL)

    R.B. Ruthven

    Birgit Steinbügl. Deutsch–englische Kollokationen: Erfassung in zweispra- chigen Wörterbüchern und Grenzen der korpusbasierten Analyse. ..... Lexikographie und Grammatik: Akten des Essener Kolloquiums zur Grammatik im Wörterbuch 28–. 30.6.1984: 118-129. Lexicographica. Series Maior 3. Tübingen: Max Niemeyer.

  19. The Case for Teaching Computer Graphics with WebGL: A 25-Year Perspective. (United States)

    Angel, Ed


    OpenGL has been the standard API for teaching computer graphics. There are now multiple versions of the standard, including WebGL. which is the JavaScript implementation of OpenGL ES 2.0. The author argues that WebGL is the version best suited for an introductory course in computer graphics.

  20. Engineering electromagnetics

    CERN Document Server

    Thomas, David T; Hartnett, James P; Hughes, William F


    The applications involving electromagnetic fields are so pervasive that it is difficult to estimate their contribution to the industrial output: generation of electricity, power transmission lines, electric motors, actuators, relays, radio, TV and microwave transmission and reception, magnetic storage, and even the mundane little magnet used to hold a paper note on the refrigerator are all electromagnetic in nature. One would be hard pressed to find a device that works without relaying on any electromagnetic principle or effect. This text provides a good theoretical understanding of the electromagnetic field equations but also treats a large number of applications. In fact, no topic is presented unless it is directly applicable to engineering design or unless it is needed for the understanding of another topic. In electrostatics, for example, the text includes discussions of photocopying, ink-jet printing, electrostatic separation and deposition, sandpaper production, paint spraying, and powder coating. In ma...

  1. Improving the electromagnetic compatibility of track circuits with electric rolling stock of double power supply with induction traction motors and electrictraction network

    Directory of Open Access Journals (Sweden)

    N.G. Visin


    Full Text Available In this article the research results of many authors on the effect of current interference from the existing electric rolling stock with induction traction motors (ITM on the track circuits and the possibility of exceeding the train traffic safety standards are used. The new promising scheme of power circuit for electric locomotive of double power supply with an ITM applying the intermediary high-frequency transformer for reducing significantly the interference effects to SCB and communication devices is developed.

  2. Electromagnetic Landscape

    DEFF Research Database (Denmark)

    Cermak, Daniel; Okutsu, Ayaka; Jørgensen, Stina Marie Hasse


    Daniel Cermak-Sassenrath, Ayaka Okutsu, Stina Hasse. Electromagnetic Landscape - In-between Signal, Noise and Environment. Installation and artist talk. 21th International Symposium on Electronic Art (ISEA) 2015, Vancouver, CAN, Aug 14-18, 2015.......Daniel Cermak-Sassenrath, Ayaka Okutsu, Stina Hasse. Electromagnetic Landscape - In-between Signal, Noise and Environment. Installation and artist talk. 21th International Symposium on Electronic Art (ISEA) 2015, Vancouver, CAN, Aug 14-18, 2015....

  3. Oxygenation by a superhydrophobic slip G/L contactor. (United States)

    Karatay, Elif; Lammertink, Rob G H


    The compelling need for an efficient supply of gases into liquids or degassing of fluids within confined microchannels triggered our study on membrane assisted microchemical systems. Porous hydrophobic flat/micro-structured polyvinylidene fluoride (PVDF) membranes were fabricated and integrated in a glass G/L contacting microfluidic device with the aid of optical adhesives. The oxygen transport in microchannels, driven by convection and diffusion, was investigated both experimentally and numerically. The effects of intrinsic membrane morphology on the G/L contacting performance of the resultant membranes were studied. The experimental performance of the flat membranes are shown to obey the simulation results with the assumptions of negligible gas phase and membrane mass transfer limitations. Micro-structured membranes revealed apparent slippage and enhanced mass transport rates, and exceeded the experimental performance of the flat membranes.

  4. Mapping Emplaced Articulated Concrete Mattress Using Geoelectrical and Electromagnetic Techniques. (United States)


    geoelectrical model is shown in Figure 25. To investigate the sensitivity of the numerical forward modeling methods to the electrical representation of... Geoelectrical and Electromagnetic Techniques by Keith J. Sjostrom, Dwain K. Butler, Robert F. Ballard Approved For Public Release; Distribution Is...documents. @ PRINTED ON RECYCLED PAPER Technical Report GL-98-17 August 1998 Mapping Emplaced Articulated Concrete Mattress Using Geoelectrical and

  5. Effects of Pulsed Electromagnetic Fields on Return to Sports After Arthroscopic Debridement and Microfracture of Osteochondral Talar Defects: A Randomized, Double-Blind, Placebo-Controlled, Multicenter Trial. (United States)

    Reilingh, Mikel L; van Bergen, Christiaan J A; Gerards, Rogier M; van Eekeren, Inge C; de Haan, Rob J; Sierevelt, Inger N; Kerkhoffs, Gino M M J; Krips, Rover; Meuffels, Duncan E; van Dijk, C N; Blankevoort, Leendert


    Osteochondral defects (OCDs) of the talus usually affect athletic patients. The primary surgical treatment consists of arthroscopic debridement and microfracture. Various possibilities have been suggested to improve the recovery process after debridement and microfracture. A potential solution to obtain this goal is the application of pulsed electromagnetic fields (PEMFs), which stimulate the repair process of bone and cartilage. The use of PEMFs after arthroscopic debridement and microfracture of an OCD of the talus leads to earlier resumption of sports and an increased number of patients that resume sports. Randomized controlled trial; Level of evidence, 1. A total of 68 patients were randomized to receive either PEMFs (n = 36) or placebo (n = 32) after arthroscopic treatment of an OCD of the talus. The primary outcomes (ie, the number of patients who resumed sports and time to resumption of sports) were analyzed with Kaplan-Meier curves as well as Mann-Whitney U, chi-square, and log-rank tests. Secondary functional outcomes were assessed with questionnaires (American Orthopaedic Foot and Ankle Society ankle-hindfoot score, Foot and Ankle Outcome Score, EuroQol, and numeric rating scales for pain and satisfaction) at multiple time points up to 1-year follow-up. To assess bone repair, computed tomography scans were obtained at 2 weeks and 1 year postoperatively. Almost all outcome measures improved significantly in both groups. The percentage of sport resumption (PEMF, 79%; placebo, 80%; P = .95) and median time to sport resumption (PEMF, 17 weeks; placebo, 16 weeks; P = .69) did not differ significantly between the treatment groups. Likewise, there were no significant between-group differences with regard to the secondary functional outcomes and the computed tomography results. PEMF does not lead to a higher percentage of patients who resume sports or to earlier resumption of sports after arthroscopic debridement and microfracture of talar OCDs. Furthermore, no

  6. Peripheral pulsed electromagnetic fields may reduce the placebo effect in migraine patients that do not respond to the sham intervention in a randomized, placebo-controlled, double-blind, cross-over clinical trial. (United States)

    San-Juan, Daniel; Pon, Ana Aurora L; Pohls, Fernando Z; Del Castillo-Calcáneo, Juan de Dios; Pérez-Neri, Iván; Ríos, Camilo


    The purpose of the study was to evaluate the effect of the pulsed electromagnetic fields (PEMF) and its possible modulation of the placebo effect in migraine. Placebo-controlled, randomized, double-blind, cross-over clinical trial. Government third level hospital. Patients with migraine were included. PEMF were applied to the wrist with a bracelet. Frequency and intensity of the migraine attacks at baseline and during treatment were recorded. Also, we valuated the possible influence of gender and the presence of aura in the PEMF and placebo responses. Eighteen patients (fifteen women, 30±2 years old) were included. Migraine frequency and intensity was reduced with both PEMF and placebo to a similar extent in the whole population. However, in responders to placebo, migraine intensity was reduced to a median of 100% with the placebo and to 60% with the PEMF, while in non-responders there was only a slight effect of both treatments. Our results do not suggest an influence of gender or presence of aura in the outcomes. Treatment with PEMF may not alter either migraine intensity or frequency compared to baseline, but may reduce the response to placebo in migraine patients. Copyright © 2011 Elsevier Ltd. All rights reserved.

  7. Millisecond accuracy video display using OpenGL under Linux. (United States)

    Stewart, Neil


    To measure people's reaction times to the nearest millisecond, it is necessary to know exactly when a stimulus is displayed. This article describes how to display stimuli with millisecond accuracy on a normal CRT monitor, using a PC running Linux. A simple C program is presented to illustrate how this may be done within X Windows using the OpenGL rendering system. A test of this system is reported that demonstrates that stimuli may be consistently displayed with millisecond accuracy. An algorithm is presented that allows the exact time of stimulus presentation to be deduced, even if there are relatively large errors in measuring the display time.

  8. Tutorial web para el aprendizaje de WebGL


    Sanz Asenjo, Alejandro


    Este proyecto abordará la tecnología WebGL, que permite la presentación de gráficos 3D en páginas web, y la dificultad que existe actualmente en su estudio y enseñanza. Es una tecnología nueva, con pocos ejemplos en la web o en los libros y que tiene una alta curva de aprendizaje. Debido a esto, el objetivo de este proyecto es obtener un sistema web de aprendizaje basado en tutoriales, el cual será utilizado como herramienta docente en la asignatura “Programación de Aplicaciones Grá...

  9. Evaluation of Gløshaugen wind conditions


    Lopez Pareja, Alejandro


    It is very important to know the wind conditions when, for example, designing buildings. In this paper, the results focus on the wind conditions needed to decide if it is interesting and right to deploy some wind turbines at the roofs of Gløshaugen s buildings in order to the university becomes energy self-sufficient; or at least more independent by generating part of its own energy. To do that, a ZephIR 300 Lidar takes wind conditions data that is analyzed and present here. Moreover, an AIR-...

  10. Learning game physics with Bullet Physics and OpenGL

    CERN Document Server

    Dickinson, Chris


    A comprehensive set of straight-forward, easy-to-follow tutorials in OpenGL and Bullet Physics that will teach you how modern game physics and 3D graphics work.If you're a beginner or intermediate programmer with a basic understanding of 3D mathematics, and you want a stronger foundation in 3D graphics and physics, then this book is perfect for you! You'll even learn some of the fundamental concepts in 3D mathematics and software design that lies beneath them both, discovering some techniques and tricks in graphics and physics that you can use in any game development project.

  11. Electromagnetic Landscape

    DEFF Research Database (Denmark)

    Cermak, Daniel; Okutsu, Ayaka; Hasse, Stina


    Electromagnetic Landscape demonstrates in direct, tangible and immediate ways effects of the disruption of the familiar. An ubiquitous technological medium, FM radio, is turned into an alien and unfamiliar one. Audience participation, the environment, radio signals and noise create a site...

  12. Electromagnetic Fields (United States)

    ... cancers. Studies in adults did not prove that EMF exposure causes cancer. Some people worry that wireless and cellular phones cause cancer or other health problems. The phones do give off radio-frequency energy (RF), a form of electromagnetic radiation. So far, scientific evidence has not found a ...

  13. SM-ROM-GL (Strong Motion Romania Ground Level Database

    Directory of Open Access Journals (Sweden)

    Ioan Sorin BORCIA


    Full Text Available The SM-ROM-GL database includes data obtained by the processing of records performed at ground level by the Romanian seismic networks, namely INCERC, NIEP, NCSRR and ISPH-GEOTEC, during recent seismic events with moment magnitude Mw ≥ 5 and epicenters located in Romania. All the available seismic records were re-processed using the same basic software and the same procedures and options (filtering and baseline correction, in order to obtain a consistent dataset. The database stores computed parameters of seismic motions, i.e. peak values: PGA, PGV, PGD, effective peak values: EPA, EPV, EPD, control periods, spectral values of absolute acceleration, relative velocity and relative displacement, as well as of instrumental intensity (as defined bz Sandi and Borcia in 2011. The fields in the database include: coding of seismic events, stations and records, a number of associated fields (seismic event source parameters, geographical coordinates of seismic stations, links to the corresponding ground motion records, charts of the response spectra of absolute acceleration, relative velocity, relative displacement and instrumental intensity, as well as some other representative parameters of seismic motions. The conception of the SM-ROM-GL database allows for an easy maintenance; such that elementary knowledge of Microsoft Access 2000 is sufficient for its operation.

  14. El glóbulo rojo en cifras

    Directory of Open Access Journals (Sweden)

    Mauricio Boyacá


    Full Text Available El glóbulo rojo es una célula de 5 a 7 micras de diámetro, se encarga de transportar oxígeno desde los pulmones hacia las células de los tejidos, mediante su adhesión a la hemoglobina, cuyo componente principal es el hierro, igualmente, cataliza la formacion de bicarbonato a partir del agua, y del dióxido de carbono, para que este último retorne a los pulmones disuelto en la sangre y ser eliminado, manteniendo viables las células y tejidos. Estas células sanguineas tienen un pequeño tamaño y ocupan un volumen mínimo medido en femtolitos (FI, ellas trasnportan una cantidad diminuta de hemoglobina medida en picogramos (Pg. La porducción de eritrocitos ocurre en la médula ósea de las especies superiores, en una relación aproximada de 35 milones de células por segundo. Estos viven 100 días en promedio, y mueren en un número similar. Los glóbulos rojos son depositados en el brazo, para reciclar sus componentes, ensamblados luego por la médula ósea como células nuevas. En consecuencia, un animal con un peso de 450 kilogramos, tendrá cerca de 300 billones de células circulando en el sistema vascular.

  15. Learn OpenGL ES for mobile game and graphics development

    CERN Document Server

    Mehta, Prateek


    One of the first OpenGL ES version 3 books for game app developers doing mobile. Covers Android code and may be useful to iOS game developers too. OpenGL ES 3 is a new significant tech update to OpenGL ES graphics API engine that fuels game apps in both iOS and Android.

  16. Computational Electromagnetics

    CERN Document Server

    Rylander, Thomas; Bondeson, Anders


    Computational Electromagnetics is a young and growing discipline, expanding as a result of the steadily increasing demand for software for the design and analysis of electrical devices. This book introduces three of the most popular numerical methods for simulating electromagnetic fields: the finite difference method, the finite element method and the method of moments. In particular it focuses on how these methods are used to obtain valid approximations to the solutions of Maxwell's equations, using, for example, "staggered grids" and "edge elements." The main goal of the book is to make the reader aware of different sources of errors in numerical computations, and also to provide the tools for assessing the accuracy of numerical methods and their solutions. To reach this goal, convergence analysis, extrapolation, von Neumann stability analysis, and dispersion analysis are introduced and used frequently throughout the book. Another major goal of the book is to provide students with enough practical understan...

  17. Electromagnetic Reciprocity.

    Energy Technology Data Exchange (ETDEWEB)

    Aldridge, David F.


    A reciprocity theorem is an explicit mathematical relationship between two different wavefields that can exist within the same space - time configuration. Reciprocity theorems provi de the theoretical underpinning for mod ern full waveform inversion solutions, and also suggest practical strategies for speed ing up large - scale numerical modeling of geophysical datasets . In the present work, several previously - developed electromagnetic r eciprocity theorems are generalized to accommodate a broader range of medi um, source , and receiver types. Reciprocity relations enabling the interchange of various types of point sources and point receivers within a three - dimensional electromagnetic model are derived. Two numerical modeling algorithms in current use are successfully tested for adherence to reciprocity. Finally, the reciprocity theorem forms the point of departure for a lengthy derivation of electromagnetic Frechet derivatives. These mathe matical objects quantify the sensitivity of geophysical electromagnetic data to variatio ns in medium parameters, and thus constitute indispensable tools for solution of the full waveform inverse problem. ACKNOWLEDGEMENTS Sandia National Labor atories is a multi - program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy's National Nuclear Security Administration under contract DE - AC04 - 94AL85000. Signif icant portions of the work reported herein were conducted under a Cooperative Research and Development Agreement (CRADA) between Sandia National Laboratories (SNL) and CARBO Ceramics Incorporated. The author acknowledges Mr. Chad Cannan and Mr. Terry Pa lisch of CARBO Ceramics, and Ms. Amy Halloran, manager of SNL's Geophysics and Atmospheric Sciences Department, for their interest in and encouragement of this work. Special thanks are due to Dr . Lewis C. Bartel ( recently retired from Sandia National Labo ratories

  18. Electromagnetic theory for electromagnetic compatibility engineers

    CERN Document Server

    Toh, Tze-Chuen


    Engineers and scientists who develop and install electronic devices and circuits need to have a solid understanding of electromagnetic theory and the electromagnetic behavior of devices and circuits. In particular, they must be well-versed in electromagnetic compatibility, which minimizes and controls the side effects of interconnected electric devices. Designed to entice the practical engineer to explore some worthwhile mathematical methods, and to reorient the theoretical scientist to industrial applications, Electromagnetic Theory for Electromagnetic Compatibility Engineers is based on the

  19. Engineering electromagnetics

    CERN Document Server

    Ida, Nathan


    This book provides students with a thorough theoretical understanding of electromagnetic field equations and it also treats a large number of applications. The text is a comprehensive two-semester textbook. The work treats most topics in two steps – a short, introductory chapter followed by a second chapter with in-depth extensive treatment; between 10 to 30 applications per topic; examples and exercises throughout the book; experiments, problems  and summaries.   The new edition includes: updated end of chapter problems; a new introduction to electromagnetics based on behavior of charges; a new section on units; MATLAB tools for solution of problems and demonstration of subjects; most chapters include a summary. The book is an undergraduate textbook at the Junior level, intended for required classes in electromagnetics. It is written in simple terms with all details of derivations included and all steps in solutions listed. It requires little beyond basic calculus and can be used for self-study. The weal...

  20. Building a Laboratory Information Management System Using Windows4GL

    Energy Technology Data Exchange (ETDEWEB)

    Pickens, M.A.; Shaieb, M.R.


    The system discussed is currently implemented at LLNL in the Environmental Services program which operates out of the Chemistry & Materials Science (C&MS) directorate. Responsibility is to provide the C&MS Environmental Services (CES) program with an enterprise-wide information system which will aid CES. The specific portion of the information system is the Sample Tracking, Analysis and Reporting System (STARS). Since CES was formed by merging two analytical laboratory organizations in May 1995, a new Laboratory Information Management System (LIMS) had to be developed. The development of a LIMS in Windows4GL was found to be satisfactory. The product STARS was well received by the user community, and it has improved business practices and efficiency in CES. The CES management staff has seen increased personnel productivity since STARS was release. We look forward to upgrading to CA-OpenROAD and taking advantage of its many improved and innovative features to further enhance STARS.

  1. Frog: The fast & realistic OpenGL event displayer (United States)

    Quertenmont, Loïc


    FROG [1] [2] is a generic framework dedicated to visualisation of events in high energy physics experiment. It is suitable to any particular physics experiment or detector design. The code is light (cross-platform OpenGL[3] and Glut [4] libraries. Moreover, Frog does not require installation of heavy third party libraries for the visualisation. This documents describes the features and principles of Frog version 1.106, its working scheme and numerous functionalities such as: 3D and 2D visualisation, graphical user interface, mouse interface, configuration files, production of pictures of various format, integration of personal objects, etc. Finally the application of FROG for physic experiment/environement, such as Gastof, CMS, ILD, Delphes will be presented for illustration.

  2. Frog: The Fast & Realistic OpenGL Event Displayer

    CERN Document Server

    Quertenmont, Loic


    FROG [1] is a generic framework dedicated to visualisation of events in high energy experiment. It is suitable for any particular physics experiment or detector design. The code is light ($<3~\\textrm{MB}$) and fast (browsing time $\\sim20$ events per second for a large High Energy Physics experiment) and can run on various operating systems, as its object-oriented structure (C++) relies on the cross-platform OpenGL[2] and GLUT [3] libraries. Moreover, \\textsc{Frog} does not require installation of third party libraries for the visualisation. This documents describes the features and principles of FROG version 1.106, its working scheme and numerous functionalities such as: 3D and 2D visualisation, graphical user interface, mouse interface, configuration files, production of pictures of various format, integration of personal objects, etc. Finally, several examples of its current applications are presented for illustration.

  3. The GL service: Web service to exchange GL string encoded HLA & KIR genotypes with complete and accurate allele and genotype ambiguity. (United States)

    Milius, Robert P; Heuer, Michael; George, Mike; Pollack, Jane; Hollenbach, Jill A; Mack, Steven J; Maiers, Martin


    Genotype list (GL) Strings use a set of hierarchical character delimiters to represent allele and genotype ambiguity in HLA and KIR genotypes in a complete and accurate fashion. A RESTful web service called genotype list service was created to allow users to register a GL string and receive a unique identifier for that string in the form of a URI. By exchanging URIs and dereferencing them through the GL service, users can easily transmit HLA genotypes in a variety of useful formats. The GL service was developed to be secure, scalable, and persistent. An instance of the GL service is configured with a nomenclature and can be run in strict or non-strict modes. Strict mode requires alleles used in the GL string to be present in the allele database using the fully qualified nomenclature. Non-strict mode allows any GL string to be registered as long as it is syntactically correct. The GL service source code is free and open source software, distributed under the GNU Lesser General Public License (LGPL) version 3 or later. Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.

  4. Electromagnet. Elektromagnet

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Amaya, N.; Weiss, F.; Schmitt, A.


    An electromagnet, particularly for use in switching valves for the direct control of a fuel injection quantity on fuel injection pumps, has a magnet pot (25) made of soft magnetic material, an annular excitation coil (30) and a magnet armature (29), which is situated with a working air gap in front of the magnet pot (25). To improve the dynamic behaviour of the electromagnet (20), ie: to achieve extremely low switching times with simple manufacture of the magnetic circuit, the magnet pot (25) and/or the magnet armature (29) made as a solid part is provided with an even number of at least four radial slots (41), which pass through the magnet pot (25) or the magnet armature (29) over their whole axial length. Successive radial slots (41a, 41b) extend alternately from the outside or from the inside jacket surface (311 or 321) to near the inside or the outside jacket surface (321 or 311) respectively and end there, always leaving a bar of material (42 or 43).

  5. Electromagnetic microactuators (United States)

    Büttgenbach, S.; Al-Halhouli, A. T.; Feldmann, M.; Seidemann, V.; Waldschik, A.


    High precision microactuators have become key elements for many applications of MEMS, for example for positioning and handling systems as well as for microfluidic devices. Electromagnetic microactuators exhibit considerable benefits such as high forces, large deflections, low input impedances and thus, the involvement of only low voltages. Most of the magnetic microactuators developed so far are based on the variable reluctance principle and use soft magnetic materials. Since the driving force of such actuators is proportional to their volume, they require structures with rather great heights and aspect ratios. Therefore, the development of new photo resists, which allow UV exposure of thick layers of resist, has been essential for the advancement of variable reluctance microactuators. On the other hand, hard magnetic materials have the potential for larger forces and larger deflections. Accordingly, polymer magnets, in which micro particles of hard magnetic material are suspended in a polymer matrix, have been used to fabricate permanent magnet microactuators. In this paper we give an overview of sophisticated electromagnetic microactuators which have been developed in our laboratory in the framework of the Collaborative Research Center "Design and Manufacturing of Active Microsystems". In particular, concept, fabrication and test of variable reluctance micro stepper motors, of permanent magnet synchronous micromotors and of microactuators based on the Lorentz force principle will be described. Special emphasis will be given to applications in lab-on-chip systems.

  6. Nucleon Electromagnetic Form Factors

    Energy Technology Data Exchange (ETDEWEB)

    Marc Vanderhaeghen; Charles Perdrisat; Vina Punjabi


    There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at JLab, MAMI, and MIT-Bates. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

  7. KEKB electromagnet power supply

    Energy Technology Data Exchange (ETDEWEB)

    Yoshida, Masato; Kubo, Tadashi [High Energy Accelerator Research Organization, Tsukuba, Ibaraki (Japan)


    Numbers of electromagnet power supply for KEKB are 2,243 except BT. To satisfy stability, DAC in the current control circuit, current detector, R and D of small thermostatic bath and a calibration method of current using CPU were introduced. They satisfied needs. With producing R and D apparatus of switching source, problems of ripple, stability and noise were solved, so that we began mass production. In this paper, many kinds of R and D and performance and troubles after operation of KEKB power source are described. A plan of design of power supply consisted of seven items such as high accuracy, serial communication of interface, small type, high affectivity, easy maintenance, independence of current setting and current detector for monitor and control of radiation and conduction noise of switching power supply. These items were satisfied by development of interface board of ARCNET communication, introduction of double buffer method for interface through CPU, power supply unit by air-cooled method using a switching method and small thermostatic oven for bending and quadrupole electromagnet. R and D of DCCT, burden and shunt resistance, DAC, thermostatic bath, power supply, offset and gain calibration by double buffer method, specification of power supply, various kinds of measurements of mass production apparatus at rising, after long operation and problems before and after operation are reported. The results of R and D made satisfy the specification of stability and ripple of power supply. Although many switching power supply were operated, there was no noise and troubles at the initial period decreased. However, in order to use many power supply, the performance measurement and maintenance are very important at long shut down. (S.Y.)

  8. Tumores de glándula mamaria en caninos

    Directory of Open Access Journals (Sweden)

    Giovanni Torres


    Full Text Available De los animales de compañía, los caninos son los que sufren con mayor frecuencia tumores de glándula mamaria y dentro de ellos las hembras son las que contribuyen con el mayor número de casos. Cuando estos tumores se presentan en machos por lo general tienen características histológicas malignas. Para el diagnóstico histopatológico la clasificación que ha tenido mayor aceptación es la propuesta por Hampe and Misdorp. A través de muchos años de investigación en este campo se han descrito varios factores considerados como predisponentes, entre los cuales están: raza, sexo, edad, dentro de estos la que presenta mayor disparidad de conceptos es la raza ya que, según algunos autores, se puede ver influenciada por factores externos como la localización geográfica y el gusto de los propietarios por ciertas razas como animales de compañía. Otro hecho importante es la descripción de agentes causales: el invalance hormonal (estrógenos, progesterona, mutaciones genéticas, (gen supresor del tumor, protooncogenes y consumo de dietas ricas en grasas. Finalmente, es importante hacer énfasis en el hecho que del diagnóstico adecuado y pautas de tratamiento llevados a cabo por el médico veterinario clínico, depende el pronóstico y las expectativas de vida del paciente canino.

  9. Professional WebGL Programming Developing 3D Graphics for the Web

    CERN Document Server

    Anyuru, Andreas


    Everything you need to know about developing hardware-accelerated 3D graphics with WebGL! As the newest technology for creating 3D graphics on the web, in both games, applications, and on regular websites, WebGL gives web developers the capability to produce eye-popping graphics. This book teaches you how to use WebGL to create stunning cross-platform apps. The book features several detailed examples that show you how to develop 3D graphics with WebGL, including explanations of code snippets that help you understand the why behind the how. You will also develop a stronger understanding of W

  10. SeqGL Identifies Context-Dependent Binding Signals in Genome-Wide Regulatory Element Maps.

    Directory of Open Access Journals (Sweden)

    Manu Setty


    Full Text Available Genome-wide maps of transcription factor (TF occupancy and regions of open chromatin implicitly contain DNA sequence signals for multiple factors. We present SeqGL, a novel de novo motif discovery algorithm to identify multiple TF sequence signals from ChIP-, DNase-, and ATAC-seq profiles. SeqGL trains a discriminative model using a k-mer feature representation together with group lasso regularization to extract a collection of sequence signals that distinguish peak sequences from flanking regions. Benchmarked on over 100 ChIP-seq experiments, SeqGL outperformed traditional motif discovery tools in discriminative accuracy. Furthermore, SeqGL can be naturally used with multitask learning to identify genomic and cell-type context determinants of TF binding. SeqGL successfully scales to the large multiplicity of sequence signals in DNase- or ATAC-seq maps. In particular, SeqGL was able to identify a number of ChIP-seq validated sequence signals that were not found by traditional motif discovery algorithms. Thus compared to widely used motif discovery algorithms, SeqGL demonstrates both greater discriminative accuracy and higher sensitivity for detecting the DNA sequence signals underlying regulatory element maps. SeqGL is available at

  11. Topological Foundations of Electromagnetism

    CERN Document Server

    Barrett, Terrence W


    Topological Foundations of Electromagnetism seeks a fundamental understanding of the dynamics of electromagnetism; and marshals the evidence that in certain precisely defined topological conditions, electromagnetic theory (Maxwell's theory) must be extended or generalized in order to provide an explanation and understanding of, until now, unusual electromagnetic phenomena. Key to this generalization is an understanding of the circumstances under which the so-called A potential fields have physical effects. Basic to the approach taken is that the topological composition of electromagnetic field

  12. Enamiku sakslaste uriinis leidub glüfosaadijääke

    Index Scriptorium Estoniae


    Toidu ja joogiga satuvad glüfosaadid paratamatult inimeste organismi. Sellisele järeldusele jõuti Heinrich Böll Foundationi korraldatud 2009 sakslase uuringus, kus osalejate uriinist leiti glüfosaadijääke 99,6% juhtudel



  14. Bases anatómicas da cirurgia da glândula tiróide


    Melo, Catarina José Monteiro Campos de


    Trabalho final de mestrado integrado em Medicina área cientifica de Anatomia, apresentado á Faculdade de Medicina da Universidade de Coimbra Introdução: É indispensável ter um conhecimento profundo da Morfologia da glândula tiróide, para minimizar a incidência de complicações suscitadas pela tiroidectomia, nomeadamente a lesão das glândulas paratiróides e dos nervos laríngeos. Objectivos: Revisão teórica sobre a Anatomia normal da glândula tiróide e das estruturas com ela relacionadas d...

  15. Tumor glômico endobrônquico com atelectasia de lobo superior direito


    Azevedo-Pereira,Artur Eugênio de; Rigueiro,Moacyr Pezati; Abrão,Fernando Conrado


    Tumores glômicos são raras neoplasias benignas de tecidos moles. Relatamos o caso de um paciente de 32 anos de idade que apresentava atelectasia em lobo superior direito devido a um tumor endobrônquico. O paciente foi submetido a lobectomia superior direita e broncoplastia em cunha. O diagnóstico patológico foi de tumor glômico endobrônquico. Até onde sabemos, essa apresentação com atelectasia em lobo superior direito nunca foi relatada. O tumor glômico deve ser considerado no diagnóstico dif...

  16. Electromagnetic Education in India (United States)

    Bajpai, Shrish; Asif, Siddiqui Sajida; Akhtar, Syed Adnan


    Out of the four fundamental interactions in nature, electromagnetics is one of them along with gravitation, strong interaction and weak interaction. The field of electromagnetics has made much of the modern age possible. Electromagnets are common in day-to-day appliances and are becoming more conventional as the need for technology increases.…

  17. Comparison of Physics Frameworks for WebGL-Based Game Engine

    Directory of Open Access Journals (Sweden)

    Yogya Resa


    Full Text Available Recently, a new technology called WebGL shows a lot of potentials for developing games. However since this technology is still new, there are still many potentials in the game development area that are not explored yet. This paper tries to uncover the potential of integrating physics frameworks with WebGL technology in a game engine for developing 2D or 3D games. Specifically we integrated three open source physics frameworks: Bullet, Cannon, and JigLib into a WebGL-based game engine. Using experiment, we assessed these frameworks in terms of their correctness or accuracy, performance, completeness and compatibility. The results show that it is possible to integrate open source physics frameworks into a WebGLbased game engine, and Bullet is the best physics framework to be integrated into the WebGL-based game engine.

  18. Comparison of Physics Frameworks for WebGL-Based Game Engine (United States)

    Yogya, Resa; Kosala, Raymond


    Recently, a new technology called WebGL shows a lot of potentials for developing games. However since this technology is still new, there are still many potentials in the game development area that are not explored yet. This paper tries to uncover the potential of integrating physics frameworks with WebGL technology in a game engine for developing 2D or 3D games. Specifically we integrated three open source physics frameworks: Bullet, Cannon, and JigLib into a WebGL-based game engine. Using experiment, we assessed these frameworks in terms of their correctness or accuracy, performance, completeness and compatibility. The results show that it is possible to integrate open source physics frameworks into a WebGLbased game engine, and Bullet is the best physics framework to be integrated into the WebGL-based game engine.

  19. Cycloplegic effects of 0.5g/L tropicamide in various low myopia age groups

    National Research Council Canada - National Science Library

    Hai-Rong Zhang; Hong-Xing Diao; Xiang Chen


    AIM: To investigated the refraction and cycloplegic effects of 0.5g/L tropicamide eye drops in various low myopia age groups, and provide clinical guidelines for proper usage of cyclopegic agent in different population. METHODS...

  20. Prinsessen og det hele kongerige. Christian IX og det glücksborgske kongehus

    DEFF Research Database (Denmark)

    Olden-Jørgensen, Sebastian

    Det glücksborgske kongehus' begyndelse og udvikling analyseres med særlig vægt på begreberne nærhed og distance samt welfare monarchy.......Det glücksborgske kongehus' begyndelse og udvikling analyseres med særlig vægt på begreberne nærhed og distance samt welfare monarchy....

  1. Antimicrobial effects of GL13K peptide coatings on S. mutans and L. casei (United States)

    Schnitt, Rebecca Ann

    Background: Enamel breakdown around orthodontic brackets, so-called "white spot lesions", is the most common complication of orthodontic treatment. White spot lesions are caused by bacteria such as Streptococci and Lactobacilli, whose acidic byproducts cause demineralization of enamel crystals. Aims: The aim of this project was to develop an antimicrobial peptide coating for titanium alloy that is capable of killing acidogenic bacteria, specifically Streptococcus mutans and Lactobacillus casei. The long-term goal is to create an antimicrobial-coated orthodontic bracket with the ability to reduce or prevent the formation of white spot lesions in orthodontic patients thereby improving clinical outcomes. Methods: First, an alkaline etching method with NaOH was established to allow effective coating of titanium discs with GL13K, an antimicrobial peptide derived from human saliva. Coatings were verified by contact angle measures, and treated discs were characterized using scanning electron microscopy. Secondly, GL13K coatings were tested against hydrolytic, proteolytic and mechanical challenges to ensure robust coatings. Third, a series of qualitative and quantitative microbiology experiments were performed to determine the effects of GL13K--L and GL13K--D on S. mutans and L. casei, both in solution and coated on titanium. Results: GL13K-coated discs were stable after two weeks of challenges. GL13K--D was effective at killing S. mutans in vitro at low doses. GL13K--D also demonstrated a bactericidal effect on L. casei, however, in contrast to S. mutans, the effect on L. casei was not statistically significant. Conclusion: GL13K--D is a promising candidate for antimicrobial therapy with possible applications for prevention of white spot lesions in orthodontics.

  2. Continuum limit of gl(M vertical stroke N) spin chains

    Energy Technology Data Exchange (ETDEWEB)

    Candu, Constantin [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Gruppe Theorie


    We study the spectrum of an integrable antiferromagnetic Hamiltonian of the gl(M vertical stroke N) spin chain of alternating fundamental and dual representations. After extensive numerical analysis, we identify the vacuum and low lying excitations and with this knowledge perform the continuum limit, while keeping a finite gap. All antiferromagnetic gl(n+N vertical stroke N) spin chains with n>0 and N{ne}0 are shown to possess in the continuum limit 2n-2 multiplets of massive particles which scatter with gl(n) Gross-Neveu like S-matrices, namely their eigenvalues do not depend on N. We argue that the continuum theory is the gl(M vertical stroke N) Gross-Neveu model, that is the massive deformation of the gl(M vertical stroke N){sub 1} Wess-Zumino-Witten model. As we can see ion the example of gl(2m vertical stroke 1) spin chains, the full particle spectrum is much richer. Our analysis suggests that for a complete characterization of the latter it is not enough to restrict to large volume calculations, as we do in this work. (orig.)

  3. Basic Electromagnetism and Materials

    CERN Document Server

    Moliton, André


    Basic Electromagnetism and Materials is the product of many years of teaching basic and applied electromagnetism. This textbook can be used to teach electromagnetism to a wide range of undergraduate science majors in physics, electrical engineering or materials science. However, by making lesser demands on mathematical knowledge than competing texts, and by emphasizing electromagnetic properties of materials and their applications, this textbook is uniquely suited to students of materials science. Many competing texts focus on the study of propagation waves either in the microwave or optical domain, whereas Basic Electromagnetism and Materials covers the entire electromagnetic domain and the physical response of materials to these waves. Professor André Moliton is Director of the Unité de Microélectronique, Optoélectronique et Polymères (Université de Limoges, France), which brings together three groups studying the optoelectronics of molecular and polymer layers, micro-optoelectronic systems for teleco...

  4. Electromagnetic ultrasonic guided waves

    CERN Document Server

    Huang, Songling; Li, Weibin; Wang, Qing


    This book introduces the fundamental theory of electromagnetic ultrasonic guided waves, together with its applications. It includes the dispersion characteristics and matching theory of guided waves; the mechanism of production and theoretical model of electromagnetic ultrasonic guided waves; the effect mechanism between guided waves and defects; the simulation method for the entire process of electromagnetic ultrasonic guided wave propagation; electromagnetic ultrasonic thickness measurement; pipeline axial guided wave defect detection; and electromagnetic ultrasonic guided wave detection of gas pipeline cracks. This theory and findings on applications draw on the author’s intensive research over the past eight years. The book can be used for nondestructive testing technology and as an engineering reference work. The specific implementation of the electromagnetic ultrasonic guided wave system presented here will also be of value for other nondestructive test developers.

  5. Comparison of the responsiveness of the pGL3 and pGL4 luciferase reporter vectors to steroid hormones. (United States)

    Dougherty, Dawne C; Sanders, Michel M


    The ovalbumin gene (Ov) gene is responsive to estrogen, glucocorticoid, androgen, and progesterone. In our efforts to characterize the regulation of the Ov gene by steroid hormones, we have repeatedly observed that many vector backbones and promoters are responsive to steroids. In order to determine which vectors are most suitable for these types of analyses, vectors from Promega's pGL3 and newly engineered pGL4 Dual-Luciferase Reporter Assay System were tested with both estrogen and/or corticosterone. The results confirmed that both series are induced by glucocorticoids in transient transfections of primary oviduct tubular gland cells, which contain glucocorticoid receptors, but not in MCF-7 cells, which do not. Modest effects that were dependent upon backbone and promoter context were observed with both series of vectors with estrogen. Thus, use of these vectors for experiments analyzing the effects of steroid hormones, especially glucocorticoids, should be done with caution. However the new pGL4 series does have some advantages over the older series, and a comparison of transcription factor binding sites is reported.

  6. Static electromagnetic frequency changers

    CERN Document Server

    Rozhanskii, L L


    Static Electromagnetic Frequency Changers is about the theory, design, construction, and applications of static electromagnetic frequency changers, devices that used for multiplication or division of alternating current frequency. It is originally published in the Russian language. This book is organized into five chapters. The first three chapters introduce the readers to the principles of operation, the construction, and the potential applications of static electromagnetic frequency changers and to the principles of their design. The two concluding chapters use some hitherto unpublished work

  7. Review on Computational Electromagnetics

    Directory of Open Access Journals (Sweden)

    P. Sumithra


    Full Text Available Computational electromagnetics (CEM is applied to model the interaction of electromagnetic fields with the objects like antenna, waveguides, aircraft and their environment using Maxwell equations.  In this paper the strength and weakness of various computational electromagnetic techniques are discussed. Performance of various techniques in terms accuracy, memory and computational time for application specific tasks such as modeling RCS (Radar cross section, space applications, thin wires, antenna arrays are presented in this paper.

  8. Electromagnetic Radiation Analysis (United States)


    A methodology is given for determining whether electromagnetic radiation of sufficient strength to cause performance degradation to the test item...exists at the test item location. The results of an electromagnetic radiation effects test are used to identify the radio frequencies and electromagnetic ... radiation levels to which the test item is susceptible. Further, using a test bed, comparisons are made with the representative signal levels to

  9. Electromagnetic Interface Testing Facility (United States)

    Federal Laboratory Consortium — The Electromagnetic Interface Testing facilitysupports such testing asEmissions, Field Strength, Mode Stirring, EMP Pulser, 4 Probe Monitoring/Leveling System, and...

  10. Evolución y desarrollo de la glándula anular de Drosophila Melanogaster


    Sánchez Higueras, Carlos


    Programa de Doctorado en Biotecnología, Ingeniería y Tecnología Química Durante el crecimiento de los artrópodos, la presencia de un exoesqueleto, obliga al animal a realizar varias mudas. En los insectos las mudas y la metamorfosis están reguladas por la hormona juvenil secretada por el corpora allata y la ecdisona secretada por la glándula protorácica. En los dípteros, ambas glándulas están asociadas en un órgano endocrino, la glándula anular. En las últimas décadas se ha ...

  11. Estudo morfológico da glândula pineal no cão


    Lucas Alécio Gomes


    A glândula pineal animal por muito tempo foi uma estrutura “esquecida” ou considerada de pouca importância para muitos estudiosos ligados à anatomia. Após a descoberta da melatonina, hormônio por ela secretado novas pesquisas e perspectivas surgiram. Neste trabalho, efetuamos estudo morfológico desta glândula no cão, mediante análise macroscópica, mesoscópica e microscópica (microscopia de luz). Para este estudo, foram utilizados 20 cães. A glândula pineal revelou um formato variando de cônic...

  12. Game and Graphics Programming for iOS and Android with OpenGL ES 20

    CERN Document Server

    Marruchi-Foino, Romain; Semko, Roman


    Develop graphically sophisticated apps and games today! The smart phone app market is progressively growing, and there is new market gap to fill that requires more graphically sophisticated applications and games. Game and Graphics Programming for iOS and Android with OpenGL ES 2.0 quickly gets you up to speed on understanding how powerful OpenGL ES 2.0 technology is in creating apps and games for amusement and effectiveness. Leading you through the development of a real-world mobile app with live code, this text lets you work with all the best features and tools that Open GL ES 2.0 has to off

  13. WebGL and web audio software lightweight components for multimedia education (United States)

    Chang, Xin; Yuksel, Kivanc; Skarbek, Władysław


    The paper presents the results of our recent work on development of contemporary computing platform DC2 for multimedia education usingWebGL andWeb Audio { the W3C standards. Using literate programming paradigm the WEBSA educational tools were developed. It offers for a user (student), the access to expandable collection of WEBGL Shaders and web Audio scripts. The unique feature of DC2 is the option of literate programming, offered for both, the author and the reader in order to improve interactivity to lightweightWebGL andWeb Audio components. For instance users can define: source audio nodes including synthetic sources, destination audio nodes, and nodes for audio processing such as: sound wave shaping, spectral band filtering, convolution based modification, etc. In case of WebGL beside of classic graphics effects based on mesh and fractal definitions, the novel image processing analysis by shaders is offered like nonlinear filtering, histogram of gradients, and Bayesian classifiers.

  14. 3D-kaupungin suunnittelu ja toteutus osana WebGL-multimediasovellusta


    Sissala, Erik


    Insinöörityön tarkoituksena oli suunnitella ja toteuttaa 3D-kaupunki osana interaktiivista multimediasovellusta, joka hyödyntää WebGL-tekniikkaa. WebGL-tekniikan avulla verkkoselaimiin saadaan 3D-grafiikkaa ilman ylimääräisiä liitännäisiä. Insinöörityön toimeksiantaja oli suomalainen hissiyhtiö. Työ lähti liikkeelle toimeksiantajan tarpeesta saada esittelytilaansa enemmän interaktiivisuutta, mielenkiintoista sisältöä ja modernia teknologiaa. Entinen esittelytilan si...

  15. Efecto de la radioterapia en glándulas salivales accesorias.


    Pérez Fernández, Carmen Aránzazu


    RESUMEN El objetivo de este trabajo es estudiar las alteraciones que las radiaciones ionizantes producen sobre las glándulas salivales accesorias labiales. En nuestro estudio se seleccionaron sujetos diagnosticados de un tumor maligno de cabeza y cuello que iban a recibir radioterapia dentro de su tratamiento, incluyendo los labios dentro del campo de irradiación. Se evaluó la secreción salival y las alteraciones morfológicas de las glándulas en el momento del diagnóstico...

  16. Tumores glômicos do osso temporal: relato de 6 casos

    Directory of Open Access Journals (Sweden)

    Walter Oleschko Arruda


    Full Text Available Os autores apresentam os achados clínicos, radiológicos e anátomo-patologicos de 6 casos de tumor glômico de osso temporal. Cinco pacientes eram do sexo feminino; a idade variava de 22 a 76 anos (média 48 anos. As manifestações clínicas predominantes foram hipoacusia, zumbido e achados otoscópicos sugestivos do diagnóstico. São revistos e discutidos vários aspectos relacionados à origem e fisiopatogênese dos tumores glômicos, assim como seu diagnóstico e tratamento.

  17. High frequency electromagnetic dosimetry

    CERN Document Server

    Sánchez-Hernández, David A


    Along with the growth of RF and microwave technology applications, there is a mounting concern about the possible adverse effects over human health from electromagnetic radiation. Addressing this issue and putting it into perspective, this groundbreaking resource provides critical details on the latest advances in high frequency electromagnetic dosimetry.

  18. Electromagnetic compatibility overview (United States)

    Davis, K. C.


    An assessment of the electromagnetic compatibility impact of the Satellite Power System is discussed. The discussion is divided into two parts: determination of the emission expected from SPS including their spatial and spectral distributions, and evaluation of the impact of such emissions on electromagnetic systems including considerations of means for mitigating effects.

  19. Electromagnetically Operated Counter (United States)

    Goldberg, H D; Goldberg, M I


    An electromagnetically operated counter wherein signals to be counted are applied to cause stepwise rotation of a rotatable element which is connected to a suitable register. The mechanism involved consists of a rotatable armature having three spaced cores of magnetic material and a pair of diametrically opposed electromagnets with a suitable pulsing circuit to actuate the magnets.

  20. Tunability enhanced electromagnetic wiggler (United States)

    Schlueter, R.D.; Deis, G.A.


    The invention discloses a wiggler used in synchrotron radiation sources and free electron lasers, where each pole is surrounded by at least two electromagnetic coils. The electromagnetic coils are energized with different amounts of current to provide a wide tunable range of the on-axis magnetic flux density, while preventing magnetic saturation of the poles. 14 figs.

  1. Classical electromagnetic radiation

    CERN Document Server

    Heald, Mark A


    Newly corrected, this highly acclaimed text is suitable for advanced physics courses. The author presents a very accessible macroscopic view of classical electromagnetics that emphasizes integrating electromagnetic theory with physical optics. The survey follows the historical development of physics, culminating in the use of four-vector relativity to fully integrate electricity with magnetism.

  2. An Electromagnetic Beam Converter

    DEFF Research Database (Denmark)


    The present invention relates to an electromagnetic beam converter and a method for conversion of an input beam of electromagnetic radiation having a bell shaped intensity profile a(x,y) into an output beam having a prescribed target intensity profile l(x',y') based on a further development...

  3. Physics of classical electromagnetism

    CERN Document Server

    Fujimoto, Minoru


    The classical electromagnetism described by the Maxwell equations constitutes a fundamental law in contemporary physics. Even with the advent of sophisticated new materials, the principles of classical electromagnetism are still active in various applied areas in today’s advanced communication techniques. Physics of Classical Electromagnetism, by Minoru Fujimoto, is written with concise introductory arguments emphasizing the original field concept, with an aim at understanding objectives in modern information technology. Following basic discussions of electromagnetism with a modernized approach, this book will provide readers with an overview of current problems in high-frequency physics. To further the reader’s understanding of the concepts and applications discussed, each illustration within the book shows the location of all active charges, and the author has provided many worked-out examples throughout the book. Physics of Classical Electromagnetism is intended for students in physics and engineering ...

  4. African swine fever virus Georgia isolate harboring deletions of 9GL and MGF360/505 genes is highly attenuated in swine but does not confer protection against parental virus challenge. (United States)

    O'Donnell, Vivian; Holinka, Lauren G; Sanford, Brenton; Krug, Peter W; Carlson, Jolene; Pacheco, Juan M; Reese, Bo; Risatti, Guillermo R; Gladue, Douglas P; Borca, Manuel V


    African swine fever virus (ASFV) produces a contagious disease of domestic pigs that results in severe economic consequences to the swine industry. Control of the disease has been hampered by the unavailability of vaccines. We recently reported the development of two experimental vaccine strains (ASFV-G-Δ9GL and ASFV-G-ΔMGF) based on the attenuation of the highly virulent and epidemiologically relevant Georgia2007 isolate. Deletion of the 9GL gene or six genes of the MGF360/505 group produced two attenuated ASFV strains which were able to confer protection to animals when challenged with the virulent parental virus. Both viruses, although efficient in inducing protection, present concerns regarding their safety. In an attempt to solve this problem we developed a novel virus strain, ASFV-G-Δ9GL/ΔMGF, based on the deletion of all genes deleted in ASFV-G-Δ9GL and ASFV-G-ΔMGF. ASFV-G-Δ9GL/ΔMGF is the first derivative of a highly virulent ASFV field strain subjected to a double round of recombination events seeking to sequentially delete specific genes. ASFV-G-Δ9GL/ΔMGF showed a decreased ability to replicate in primary swine macrophage cultures relative to that of ASFV-G and ASFV-G-ΔMGF but similar to that of ASFV-G-Δ9GL. ASFV-G-Δ9GL/ΔMGF was attenuated when intramuscularly inoculated into swine, even at doses as high as 10(6) HAD50. Animals infected with doses ranging from 10(2) to 10(6) HAD50 did not present detectable levels of virus in blood at any time post-infection and they did not develop detectable levels of anti-ASFV antibodies. Importantly, ASFV-G-Δ9GL/ΔMGF does not induce protection against challenge with the virulent parental ASFV-G isolate. Results presented here suggest caution towards approaches involving genomic manipulations when developing rationally designed ASFV vaccine strains. Published by Elsevier B.V.

  5. O darwinismo nas Conferências Populares da Glória Darwinism in the Popular Conferences in the Glória district of Rio de Janeiro

    Directory of Open Access Journals (Sweden)

    Karoline Carula


    Full Text Available Este artigo aborda o darwinismo exposto, entre 1875 e 1880, nas Conferências Populares da Glória - preleções públicas realizadas na escola da Freguesia da Glória, no Rio de Janeiro. As conferências que tiveram as idéias darwinistas como temática foram recebidas e repercutidas na imprensa de maneira polêmica. Apresenta-se a concepção sobre o darwinismo do médico Miranda Azevedo, o primeiro, mas não o único, a discursar sobre o tema. Com relação às conferências desse médico, analisa-se a aplicabilidade social do darwinismo por ele defendida, e as discussões na imprensa sobre a propagação do darwinismo no Brasil e sobre a possível origem símia do homem. Por fim, analisam-se as preleções de outros conferencistas que ou versaram sobre o tema mais diretamente ou perpassaram o assunto.In this paper I examine the Darwinism that transpired, between 1875 and 1880, during the Popular Conferences in the Gloria district - public conferences that took place at the Freguesia da Glória school, in Rio de Janeiro. The Conferences that had Darwinism as a subject were received and reverberated in the press polemically. I present the conception of Darwinism held by doctor Miranda Azevedo, the first, but not the only speaker, to discuss the subject. Concerning this doctor's conferences, I analyze the social application of Darwinism defended by him, and the discussions in the press about the spread of Darwinism in Brazil, and the possible simian origin of man. Finally, I talk about other lecturers' talks that either directly broached the subject or mentioned it in passing.

  6. The detection of a discrete outflow from the young stellar object GL 490 (United States)

    Mitchell, G. F.; Allen, M.; Beer, R.; Dekany, R.; Huntress, W.


    A high-resolution (0.059/cm) M-band spectrum has been obtained of the embedded young stellar object GL490. The spectrum shows interstellar absorption in the fundamental vibrational band, v = 1-0, of (C-12)O. Two strong and narrow (10 km/s) velocity components are present. One, at the velocity of GL490 (vLSR = -16 km/s), is likely gas in the molecular cloud within which GL490 is embedded. The other component is blueshifted by 13 km/s relative to GL490. An observation of emission from the J = 3-2 transition of HCO(+) using a 20-arcsec beam supports the view that the blueshifted gas is near the central object. The -29-km/s feature is interpreted as a recently ejected shell. It is conjectured that the extended outflows of cold molecular gas seen by millimeter CO emission observations are driven by sporadic outbursts rather than by continuous flows from the central object.

  7. Data of evolutionary structure change: 1SZOH-2J5GL [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available Chain>1SZOH RLERD-GGVLL e>EEEEE- EEEucture...HRDENGILE >EEEEE EEE> ATOM 22372...ryIDChain>1SZOH DFTSF-NLGTP cture...2J5GL DFPSLGDVTNP > H> EGGG - H> ATOM 14157 CA ASP H 78 60.734 94.793 25.324 1.00

  8. Learning Three.js the JavaScript 3D library for WebGL

    CERN Document Server

    Dirksen, Jos


    If you know JavaScript and want to start creating 3D graphics that run in any browser, this book is a great choice for you. You don't need to know anything about math or WebGL; all that you need is general knowledge of JavaScript and HTML.

  9. RIM+ "STYLE GUIDE" EN CODEER REGELS voor Ingres Windows4GL

    NARCIS (Netherlands)

    van der Maas CWM; Slootweg J; Knol OM; Laan WPM; Baart R; Bruinsma PH


    The LAE-department (Laboratory for Waste Materials and Emissions) is developing an Environmental Information and Planning Model (RIM+). This is a collection of applications based on an Ingres database. For the development of the applications Windows4GL is used in combination with embedded SQL for

  10. Simultaneous Deletion of the 9GL and UK Genes from the African Swine Fever Virus Georgia 2007 Isolate Offers Increased Safety and Protection against Homologous Challenge. (United States)

    O'Donnell, Vivian; Risatti, Guillermo R; Holinka, Lauren G; Krug, Peter W; Carlson, Jolene; Velazquez-Salinas, Lauro; Azzinaro, Paul A; Gladue, Douglas P; Borca, Manuel V


    African swine fever virus (ASFV) is the etiological agent of a contagious and often lethal viral disease of domestic pigs that has significant economic consequences for the swine industry. The control of African swine fever (ASF) has been hampered by the unavailability of vaccines. Successful experimental vaccines have been derived from naturally occurring, cell culture-adapted, or genetically modified live attenuated ASFV. Recombinant viruses harboring engineered deletions of specific virulence-associated genes induce solid protection against challenge with parental viruses. Deletion of the 9GL (B119L) gene in the highly virulent ASFV isolates Malawi Lil-20/1 (Mal) and Pretoriuskop/96/4 (Δ9GL viruses) resulted in complete protection when challenged with parental isolates. When similar deletions were created within the ASFV Georgia 2007 (ASFV-G) genome, attenuation was achieved but the protective and lethal doses were too similar. To enhance attenuation of ASFV-G, we deleted another gene, UK (DP96R), which was previously shown to be involved in attenuation of the ASFV E70 isolate. Here, we report the construction of a double-gene-deletion recombinant virus, ASFV-G-Δ9GL/ΔUK. When administered intramuscularly (i.m.) to swine, there was no induction of disease, even at high doses (10 6 HAD 50 ). Importantly, animals infected with 10 4 50% hemadsorbing doses (HAD 50 ) of ASFV-G-Δ9GL/ΔUK were protected as early as 14 days postinoculation when challenged with ASFV-G. The presence of protection correlates with the appearance of serum anti-ASFV antibodies, but not with virus-specific circulating ASFV-specific gamma interferon (IFN-γ)-producing cells. ASFV-G-Δ9GL/ΔUK is the first rationally designed experimental ASFV vaccine that protects against the highly virulent ASFV Georgia 2007 isolate as early as 2 weeks postvaccination. Currently, there is no commercially available vaccine against African swine fever. Outbreaks of the disease are devastating to the swine

  11. Morfologia da glândula pineal de gambás (Didelphis sp

    Directory of Open Access Journals (Sweden)

    Celina Almeida Furlanetto Mançanares


    Full Text Available A glândula pineal deve ser analisada e estudada em animais da fauna brasileira, para que dados da pesquisa básica possam ser aplicados em novas técnicas de manejo reprodutivo destes animais, inclusive em cativeiro, face à íntima relação deste órgão fotorreceptor com o ciclo reprodutivo. Para este estudo, foram utilizados 10 gambás (Didelphis sp, provenientes do Departamento de Anatomia da USP e da UNIFEOB, já mortos e fixados. Nenhum animal foi submetido a situações de dor/sofrimento e ao sacrifício de sua vida. A glândula pineal foi encontrada em todos animais estudados e apresentou-se com diminutas dimensões, não sendo possível, portanto descrever-lhe características macroscópicas. Através da análise microscópica pudemos localizar a glândula no espaço correspondente ao plano mediano, em relação ao encéfalo, rostral e dorsalmente aos colículos rostrais, ventralmente aos hemisférios cerebrais e caudalmente à comissura habenular. Consiste de uma evaginação do teto do diencéfalo e mostra-se em forma de "U" invertido. Comparativamente a características de glândulas pineais de outras espécies animais, a do Didelphis genus, que estudamos, revela peculiaridades tanto em relação ao seu tamanho, apenas perceptível microscopicamente, quanto ao fato de apresentar células semelhantes às secretoras, dispersas também em áreas vizinhas. Tais peculiaridades motivam reflexões sobre o papel funcional da glândula, na espécie considerada.

  12. Colgajos de perforantes de arteria glútea superior y arteria glútea inferior Gluteal artery perforator flaps: S-GAP and I-GAP

    Directory of Open Access Journals (Sweden)

    R. J. Allen


    Full Text Available En la actualidad la transferencia de tejido ha evolucionado hasta el nivel de los colgajos de perforantes, los cuales aportan tejido formado por piel y grasa, con la mínima morbilidad a nivel de la zona donante. Los colgajos de perforantes de la región glútea, de arteria glutea superior (S-GAP y de arteria glutea inferior (I-GAP, han ganado popularidad debido a su fiabilidad, preservación del músculo, versatilidad en el diseño sin comprometer otras alternativas reconstructivas y por su baja morbilidad. Se analizarán en este artículo de forma detallada la anatomía, técnica quirúrgica e indicaciones específicas de estos colgajos de perforantes de la región glútea.The evolution of free tissue transfer has progressed to the level of the perforator flaps. They allow the transfer of the patient’s own skin and fat in a reliable way with minimal donor-site morbidity. Nowadays the gluteal artery perforator flaps, superior (S-GAP and inferior (I-GAP, have gained popularity due to reliability, preservation of the muscle, versatility in flap design without restricting other flap options, and lower donor-site morbidity. Anatomy of the gluteal region, flap raising technique and specific indications will be well-described.

  13. Nonlinear surface electromagnetic phenomena

    CERN Document Server

    Ponath, H-E


    In recent years the physics of electromagnetic surface phenomena has developed rapidly, evolving into technologies for communications and industry, such as fiber and integrated optics. The variety of phenomena based on electromagnetism at surfaces is rich and this book was written with the aim of summarizing the available knowledge in selected areas of the field. The book contains reviews written by solid state and optical physicists on the nonlinear interaction of electromagnetic waves at and with surfaces and films. Both the physical phenomena and some potential applications are

  14. Computer techniques for electromagnetics

    CERN Document Server

    Mittra, R


    Computer Techniques for Electromagnetics discusses the ways in which computer techniques solve practical problems in electromagnetics. It discusses the impact of the emergence of high-speed computers in the study of electromagnetics. This text provides a brief background on the approaches used by mathematical analysts in solving integral equations. It also demonstrates how to use computer techniques in computing current distribution, radar scattering, and waveguide discontinuities, and inverse scattering. This book will be useful for students looking for a comprehensive text on computer techni

  15. BGO* electromagnetic calorimeter

    CERN Multimedia



    * Short for Bismuth-Germanium-Oxyde, a scintillator of high atomic number Z used in electromagnetic crystal calorimeters. BGO is characterized by fast rise time (a few nanoseconds) and short radiation length (1.11 cm).

  16. Broadband Electromagnetic Technology (United States)


    The objectives of this project are to continue the enhancements to the combined Broadband Electromagnetic and Full Encirclement Unit (BEM-FEU) technologies and to evaluate the systems capability in the laboratory and the field. The BEM instrument ...

  17. Computational electromagnetic-aerodynamics

    CERN Document Server

    Shang, Joseph J S


    Presents numerical algorithms, procedures, and techniques required to solve engineering problems relating to the interactions between electromagnetic fields, fluid flow, and interdisciplinary technology for aerodynamics, electromagnetics, chemical-physics kinetics, and plasmadynamics This book addresses modeling and simulation science and technology for studying ionized gas phenomena in engineering applications. Computational Electromagnetic-Aerodynamics is organized into ten chapters. Chapter one to three introduce the fundamental concepts of plasmadynamics, chemical-physics of ionization, classical magnetohydrodynamics, and their extensions to plasma-based flow control actuators, high-speed flows of interplanetary re-entry, and ion thrusters in space exploration. Chapter four to six explain numerical algorithms and procedures for solving Maxwell’s equation in the time domain for computational electromagnetics, plasma wave propagation, and the time-dependent c mpressible Navier-Stokes equation for aerodyn...

  18. The classical electromagnetic field

    CERN Document Server

    Eyges, Leonard


    This excellent text covers a year's course in advanced theoretical electromagnetism, first introducing theory, then its application. Topics include vectors D and H inside matter, conservation laws for energy, momentum, invariance, form invariance, covariance in special relativity, and more.

  19. Purely electromagnetic spacetimes


    Ivanov, B. V.


    Electrovacuum solutions devoid of usual mass sources are classified in the case of one, two and three commuting Killing vectors. Three branches of solutions exist. Electromagnetically induced mass terms appear in some of them.

  20. Electromagnetic reverberation chambers

    CERN Document Server

    Besnier, Philippe


    Dedicated to a complete presentation on all aspects of reverberation chambers, this book provides the physical principles behind these test systems in a very progressive manner. The detailed panorama of parameters governing the operation of electromagnetic reverberation chambers details various applications such as radiated immunity, emissivity, and shielding efficiency experiments.In addition, the reader is provided with the elements of electromagnetic theory and statistics required to take full advantage of the basic operational rules of reverberation chambers, including calibration proc

  1. Electromagnetic Education in India

    Directory of Open Access Journals (Sweden)

    Bajpai Shrish


    Full Text Available Out of the four fundamental interactions in nature, electromagnetics is one of them along with gravitation, strong interaction and weak interaction. The field of electromagnetics has made much of the modern age possible. Electromagnets are common in day-to-day appliances and are becoming more conventional as the need for technology increases. Electromagnetism has played a vital role in the progress of human kind ever since it has been understood. Electromagnets are found everywhere. One can find them in speakers, doorbells, home security systems, anti-shoplifting systems, hard drives, mobiles, microphones, Maglev trains, motors and many other everyday appliances and products. Before diving into the education system, it is necessary to reiterate its importance in various technologies that have evolved over time. Almost every domain of social life has electromagnetic playing its role. Be it the mobile vibrators you depend upon, a water pump, windshield wipers during rain and the power windows of your car or even the RFID tags that may ease your job during shopping. A flavor of electromagnetics is essential during primary level of schooling for the student to understand its future prospects and open his/her mind to a broad ocean of ideas. Due to such advancements this field can offer, study on such a field is highly beneficial for a developing country like India. The paper presents the scenario of electromagnetic education in India, its importance and numerous schemes taken by the government of India to uplift and acquaint the people about the importance of EM and its applications.

  2. Electromagnetic rotational actuation.

    Energy Technology Data Exchange (ETDEWEB)

    Hogan, Alexander Lee


    There are many applications that need a meso-scale rotational actuator. These applications have been left by the wayside because of the lack of actuation at this scale. Sandia National Laboratories has many unique fabrication technologies that could be used to create an electromagnetic actuator at this scale. There are also many designs to be explored. In this internship exploration of the designs and fabrications technologies to find an inexpensive design that can be used for prototyping the electromagnetic rotational actuator.

  3. Grid computing for electromagnetics

    CERN Document Server

    Tarricone, Luciano


    Today, more and more practitioners, researchers, and students are utilizing the power and efficiency of grid computing for their increasingly complex electromagnetics applications. This cutting-edge book offers you the practical and comprehensive guidance you need to use this new approach to supercomputing for your challenging projects. Supported with over 110 illustrations, the book clearly describes a high-performance, low-cost method to solving huge numerical electromagnetics problems.

  4. Permanent storage of light in a double-slab structure (United States)

    Chen, Jiangwei; Yuan, Guoxuan; Tao, Zhikuo


    In this paper, we shall demonstrate firstly that a normal incidence can be totally reflected from a slab made of active metamaterial with purely-imaginary-impedance. Then we shall predict that a localized steady state of electromagnetic wave dependent on initial input can exist in a double-slab structure, which relates to the non null solution of equations formed by electromagnetic field boundary conditions. These results may provide a feasible way to effectively treat loss and/or gain problems and thus store electromagnetic wave (light) permanently at room temperature. In addition, our work indicates that metamaterials with purely-imaginary-impedance may enable remarkable electromagnetic phenomena and merit further study.

  5. The electromagnetic and acoustic properties of smoke particulates (United States)

    Churches, David K.

    The research work explores the Electromagnetic and Acoustic Properties of Smoke Particulates from real fires, and the initial development of an alternative method of smoke detection based on the study work. The research was entirely self-funded including the purchase of the experimental apparatus, test equipment and calibration to international standards. The study includes the properties of solid and liquid post combustion particulates in air suspension forming smoke plumes, and the associated fluid flow dynamics. As part of the study the electromagnetic and acoustic properties of smoke particulates, a somewhat unique detection method described as the ``Double Matrix Board System'' was developed and used. It was initially developed to assist in the electromagnetic study work, and was later modified to examine the acoustic properties. The published results of the research on the ``Double Matrix Board System'' and the details of the patent application for the device are included in the Appendices to the Thesis document.

  6. Glándula hipofisaria: morfología normal y patológica


    Cónsole-Avegliano, Gloria Miriam


    La obra Glándula hipofisaria: morfología normal y patológica integra y actualiza las investigaciones morfológicas normales y patológicas del eje hipotálamo-hipofisario desarrolladas en el Laboratorio de Investigaciones Neuroendocrinas de la Cátedra B de Citología, Histología y Embriología de la Facultad de Ciencias Médicas de la Universidad Nacional de La Plata (período 1990-2016). Los estudios morfológicos de la glándula pituitaria aportan una revisión de la embriología molecular, la hist...

  7. iPhone 3D Programming Developing Graphical Applications with OpenGL ES

    CERN Document Server

    Rideout, Philip


    What does it take to build an iPhone app with stunning 3D graphics? This book will show you how to apply OpenGL graphics programming techniques to any device running the iPhone OS -- including the iPad and iPod Touch -- with no iPhone development or 3D graphics experience required. iPhone 3D Programming provides clear step-by-step instructions, as well as lots of practical advice, for using the iPhone SDK and OpenGL. You'll build several graphics programs -- progressing from simple to more complex examples -- that focus on lighting, textures, blending, augmented reality, optimization for pe

  8. Experimental immunotherapy for malignant glioma: lessons from two decades of research in the GL261 model. (United States)

    Maes, Wim; Van Gool, Stefaan W


    Nearly twenty years of experimental immunotherapy for malignant glioma yielded important insights in the mechanisms governing glioma immunology. Still considered promising, it is clear that immunotherapy does not on its own represent the magic bullet in glioma therapy. In this review, we summarize the major immunotherapeutic achievements in the mouse GL261 glioma model, which has emerged as the gold standard syngeneic model for experimental glioma therapy. Gene therapy, monoclonal antibody treatment, cytokine therapy, cell transfer strategies and dendritic cell therapy were hereby considered. Apart from the considerable progress made in understanding glioma immunology in this model, we also addressed its most pertinent issues and shortcomings. Despite these, the GL261 model will remain indispensable in glioma research since it is a fast, highly reproducible and easy-to-establish model system.

  9. WebGL-enabled 3D visualization of a Solar Flare Simulation (United States)

    Chen, A.; Cheung, C. M. M.; Chintzoglou, G.


    The visualization of magnetohydrodynamic (MHD) simulations of astrophysical systems such as solar flares often requires specialized software packages (e.g. Paraview and VAPOR). A shortcoming of using such software packages is the inability to share our findings with the public and scientific community in an interactive and engaging manner. By using the javascript-based WebGL application programming interface (API) and the three.js javascript package, we create an online in-browser experience for rendering solar flare simulations that will be interactive and accessible to the general public. The WebGL renderer displays objects such as vector flow fields, streamlines and textured isosurfaces. This allows the user to explore the spatial relation between the solar coronal magnetic field and the thermodynamic structure of the plasma in which the magnetic field is embedded. Plans for extending the features of the renderer will also be presented.

  10. Research and exploitation of CNC laser manufacturing online monitoring system based on OpenGL (United States)

    Wang, Gang; Hu, Shengsun; Wang, Mingjian; Ding, Wei; Zhao, Jie


    CNC manufacturing online monitoring technology is a significant method to improve the processing quality and achieve an important part of intelligent processing. Based on OpenGL 3D graphics technology, a Computer Numerical Control (CNC ) Laser Manufacturing 3D model is established; based on the model and the powerful ability of OpenGL, a CNC manufacturing on-line monitoring system is developed so as to achieve the ability of CNC remote real-time online monitoring in different working locations. Remote real-time online monitoring of different position of the CNC is realized. The online monitoring scope of the CNC is enlarged, with more flexibility to meet the demands of practical application, meanwhile the cost of hardware investment is greatly reduced.

  11. Perfluorocarbon emulsions radiosensitise brain tumors in carbogen breathing mice with orthotopic GL261 gliomas (United States)

    Feldman, Lisa A.; Fabre, Marie-Sophie; Grasso, Carole; Reid, Dana; Broaddus, William C.; Lanza, Gregory M.; Spiess, Bruce D.; Garbow, Joel R.; McConnell, Melanie J.


    Background Tumour hypoxia limits the effectiveness of radiation therapy. Delivering normobaric or hyperbaric oxygen therapy elevates pO2 in both tumour and normal brain tissue. However, pO2 levels return to baseline within 15 minutes of stopping therapy. Aim To investigate the effect of perfluorocarbon (PFC) emulsions on hypoxia in subcutaneous and intracranial mouse gliomas and their radiosensitising effect in orthotopic gliomas in mice breathing carbogen (95%O2 and 5%CO2). Results PFC emulsions completely abrogated hypoxia in both subcutaneous and intracranial GL261 models and conferred a significant survival advantage orthotopically (Mantel Cox: p = 0.048) in carbogen breathing mice injected intravenously (IV) with PFC emulsions before radiation versus mice receiving radiation alone. Carbogen alone decreased hypoxia levels substantially and conferred a smaller but not statistically significant survival advantage over and above radiation alone. Conclusion IV injections of PFC emulsions followed by 1h carbogen breathing, radiosensitises GL261 intracranial tumors. PMID:28873460

  12. C.W.W. BeecherEl and G.L. BogveC

    African Journals Online (AJOL)

    MOI.-LUSCICIDAL CONS'I'i'I'UENTS OF THE STEM BARK. OF TETRAPLEURA TETRAPTERA. 0.13. Ngamapaa, N.R. Farnsworth*a, T.O. Hendersonb,. C.W.W. BeecherEl and G.L. BogveC. 8'LE-'rograirn for Collaborative Research in the Pharmaceutical Sciences,. College of Pharmacy University of Illinois at Chicago, Box ...

  13. Development and implementation of a propeller test capability for GL-10 "Greased Lightning" propeller design (United States)

    Duvall, Brian Edward

    Interest in small unmanned aerial vehicles has increased dramatically in recent years. Hybrid vehicles which allow forward flight as a fixed wing aircraft and a true vertical landing capability have always had applications. Management of the available energy and noise associated with electric propeller propulsion systems presents many challenges. NASA Langley has developed the Greased Lightning 10 (GL-10) vertical takeoff, unmanned aerial vehicle with ten individual motors and propellers. All are used for propulsion during takeoff and contribute to acoustic noise pollution which is an identified nuisance to the surrounding users. A propeller test capability was developed to gain an understanding of how the noise can be reduced while meeting minimum thrust requirements. The designed propeller test stand allowed for various commercially available propellers to be tested for potential direct replacement of the current GL-10 propellers and also supported testing of a newly designed propeller provided by the Georgia Institute of Technology. Results from the test program provided insight as to which factors affect the noise as well as performance characteristics. The outcome of the research effort showed that the current GL-10 propeller still represents the best choice of all the candidate propellers tested.

  14. Employing WebGL to develop interactive stereoscopic 3D content for use in biomedical visualization (United States)

    Johnston, Semay; Renambot, Luc; Sauter, Daniel


    Web Graphics Library (WebGL), the forthcoming web standard for rendering native 3D graphics in a browser, represents an important addition to the biomedical visualization toolset. It is projected to become a mainstream method of delivering 3D online content due to shrinking support for third-party plug-ins. Additionally, it provides a virtual reality (VR) experience to web users accommodated by the growing availability of stereoscopic displays (3D TV, desktop, and mobile). WebGL's value in biomedical visualization has been demonstrated by applications for interactive anatomical models, chemical and molecular visualization, and web-based volume rendering. However, a lack of instructional literature specific to the field prevents many from utilizing this technology. This project defines a WebGL design methodology for a target audience of biomedical artists with a basic understanding of web languages and 3D graphics. The methodology was informed by the development of an interactive web application depicting the anatomy and various pathologies of the human eye. The application supports several modes of stereoscopic displays for a better understanding of 3D anatomical structures.

  15. 3D Web-based HMI with WebGL Rendering Performance

    Directory of Open Access Journals (Sweden)

    Muennoi Atitayaporn


    Full Text Available An HMI, or Human-Machine Interface, is a software allowing users to communicate with a machine or automation system. It usually serves as a display section in SCADA (Supervisory Control and Data Acquisition system for device monitoring and control. In this papper, a 3D Web-based HMI with WebGL (Web-based Graphics Library rendering performance is presented. The main purpose of this work is to attempt to reduce the limitations of traditional 3D web HMI using the advantage of WebGL. To evaluate the performance, frame rate and frame time metrics were used. The results showed 3D Web-based HMI can maintain the frame rate 60FPS for #cube=0.5K/0.8K, 30FPS for #cube=1.1K/1.6K when it was run on Internet Explorer and Chrome respectively. Moreover, the study found that 3D Web-based HMI using WebGL contains similar frame time in each frame even though the numbers of cubes are up to 5K. This indicated stuttering incurred less in the proposed 3D Web-based HMI compared to the chosen commercial HMI product.

  16. Medium effect on the characteristics of the coupled seismic and electromagnetic signals. (United States)

    Huang, Qinghua; Ren, Hengxin; Zhang, Dan; Chen, Y John


    Recently developed numerical simulation technique can simulate the coupled seismic and electromagnetic signals for a double couple point source or a finite fault planar source. Besides the source effect, the simulation results showed that both medium structure and medium property could affect the coupled seismic and electromagnetic signals. The waveform of coupled signals for a layered structure is more complicated than that for a simple uniform structure. Different from the seismic signals, the electromagnetic signals are sensitive to the medium properties such as fluid salinity and fluid viscosity. Therefore, the co-seismic electromagnetic signals may be more informative than seismic signals.

  17. Patología quirúrgica de la glándula tiroides

    Directory of Open Access Journals (Sweden)

    Juan Oré


    Full Text Available Introducción: Debido a la gran diversidad de patología quirúrgica de la glándula tiroides y su alta frecuencia en nuestro medio, creemos conveniente presentar nuestra experiencia en esta patología. Objetivos: Conocer la incidencia de la patología quirúrgica de la glándula tiroides, según diagnóstico anatomopatológico, en pacientes operados. Diseño: Estudio retrospectivo, observacional y descriptivo. Lugar: Servicio de cirugía de cabeza y cuello, Hospital Dos de Mayo, Lima, Perú, hospital de enseñanza médica. Participantes: Pacientes operados de la glándula tiroides. Intervenciones: Se revisó las historias clínicas de pacientes operados de la glándula tiroides, desde enero de 1997 hasta diciembre de 2006. Principales medidas de resultados: Resultados anatomopatológicos en los especímenes de glándula tiroides. Resultados: Hubo 274 casos operados, de los cuales 81,4% del total correspondió al sexo femenino; 56,9% de los casos provenía de fuera de Lima y Callao, con edades que fluctuaban desde los 30 y 59 años. El tumor fue el signo predominante en 97,8% de los casos. La operación realizada más frecuente fue la tiroidectomía total (39,8%. La patología benigna representó 58% de los casos, con el adenoma folicular como principal patología benigna (23%; dentro de las neoplasias malignas (42% del total, 23,7% era carcinoma papilar. Conclusiones: La patología tumoral tiroidea presentó un marcado predominio en el sexo femenino, principalmente en los grupos etáreos de la 4a, 5a y 6a décadas. La patología glandular tiroidea fue en su mayoría benigna, y de la maligna, el carcinoma papilar. Con alto valor de especificidad (97,7% y valor predictivo positivo (95,4%, la biopsia de aspiración por aguja fina de tiroides continúa siendo el examen auxiliar más importante en el estudio del paciente con patología tumoral tiroidea.

  18. Electromagnetic fields and their impacts (United States)

    Prša, M. A.; Kasaš-Lažetić, K. K.


    The main goal of this paper is to briefly recall some different electromagnetic field definitions, some macroscopic sources of electromagnetic fields, electromagnetic fields classification regarding time dependences, and the ways of field determination in concrete cases. After that, all the mechanisms of interaction between electromagnetic field and substance, on atomic level, are described in details. Interaction between substance and electric field is investigated separately from the substance and magnetic field interaction. It is demonstrated that, in all cases of the unique electromagnetic field, total interaction can be treated as a superposition of two separated interactions. Finally, the main electromagnetic fields surrounding us is cited and discussed.

  19. Aircraft electromagnetic compatibility (United States)

    Clarke, Clifton A.; Larsen, William E.


    Illustrated are aircraft architecture, electromagnetic interference environments, electromagnetic compatibility protection techniques, program specifications, tasks, and verification and validation procedures. The environment of 400 Hz power, electrical transients, and radio frequency fields are portrayed and related to thresholds of avionics electronics. Five layers of protection for avionics are defined. Recognition is given to some present day electromagnetic compatibility weaknesses and issues which serve to reemphasize the importance of EMC verification of equipment and parts, and their ultimate EMC validation on the aircraft. Proven standards of grounding, bonding, shielding, wiring, and packaging are laid out to help provide a foundation for a comprehensive approach to successful future aircraft design and an understanding of cost effective EMC in an aircraft setting.

  20. Metamaterial electromagnetic wave absorbers. (United States)

    Watts, Claire M; Liu, Xianliang; Padilla, Willie J


    The advent of negative index materials has spawned extensive research into metamaterials over the past decade. Metamaterials are attractive not only for their exotic electromagnetic properties, but also their promise for applications. A particular branch-the metamaterial perfect absorber (MPA)-has garnered interest due to the fact that it can achieve unity absorptivity of electromagnetic waves. Since its first experimental demonstration in 2008, the MPA has progressed significantly with designs shown across the electromagnetic spectrum, from microwave to optical. In this Progress Report we give an overview of the field and discuss a selection of examples and related applications. The ability of the MPA to exhibit extreme performance flexibility will be discussed and the theory underlying their operation and limitations will be established. Insight is given into what we can expect from this rapidly expanding field and future challenges will be addressed. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  1. Aircraft electromagnetic compatibility (United States)

    Clarke, Clifton A.; Larsen, William E.


    Illustrated are aircraft architecture, electromagnetic interference environments, electromagnetic compatibility protection techniques, program specifications, tasks, and verification and validation procedures. The environment of 400 Hz power, electrical transients, and radio frequency fields are portrayed and related to thresholds of avionics electronics. Five layers of protection for avionics are defined. Recognition is given to some present day electromagnetic compatibility weaknesses and issues which serve to reemphasize the importance of EMC verification of equipment and parts, and their ultimate EMC validation on the aircraft. Proven standards of grounding, bonding, shielding, wiring, and packaging are laid out to help provide a foundation for a comprehensive approach to successful future aircraft design and an understanding of cost effective EMC in an aircraft setting.

  2. Applied electromagnetic scattering theory

    CERN Document Server

    Osipov, Andrey A


    Besides classical applications (radar and stealth, antennas, microwave engineering), scattering and diffraction are enabling phenomena for some emerging research fields (artificial electromagnetic materials or metamaterials, terahertz technologies, electromagnetic aspects of nano-science). This book is a tutorial for advanced students who need to study diffraction theory. The textbook gives fundamental knowledge about scattering and diffraction of electromagnetic waves and provides some working examples of solutions for practical high-frequency scattering and diffraction problems. The book focuses on the most important diffraction effects and mechanisms influencing the scattering process and describes efficient and physically justified simulation methods - physical optics (PO) and the physical theory of diffraction (PTD) - applicable in typical remote sensing scenarios. The material is presented in a comprehensible and logical form, which relates the presented results to the basic principles of electromag...

  3. Lipidomics investigation of reversal effect of glycyrrhizin (GL) towards lithocholic acid (LCA)-induced alteration of phospholipid profiles. (United States)

    Han, Jing-Chun; Yu, Jian; Gao, Ya-Jie


    Glycyrrhizin (GL), the major ingredient isolated from licorice, exerts multiple pharmacological activities. To elucidate the protective mechanism of GL towards lithocholic acid (LCA)-induced liver toxicity using lipidomics. GL (200 mg/kg) dissolved in corn oil was treated intraperitoneally for 7 d. On the 4th day, 200 mg/kg LCA was used to treat mice (i.p., twice daily) for another 4 d. The protective role of GL towards LCA-induced liver toxicity was investigated through evaluating the liver histology and the activity of alanine transaminase (ALT). The complete lipid profile was employed using UFLC-Triple TOF MS-based lipidomics. Intraperitoneal (i.p.) administration of 200 mg/kg GL can significantly protect LCA-induced liver damage, indicated by alleviated histology alteration and prevention of the ALT elevation. Lipidomics analysis can well separate the control group from LCA-treated group, and three lipid components were major contributors, including LPC 16:0, LPC 18:0, and LPC 18:2. GL treatment can significantly prevent LCA-induced reduction of these three lipid compounds, providing a new explanation for GL's protection mechanism towards LCA-induced liver toxicity. The recent study highlights the importance of lipidomics in elucidating the therapeutic mechanism of herbs.

  4. Electromagnetic compatibility engineering

    CERN Document Server

    Ott, Henry W


    Praise for Noise Reduction Techniques IN electronic systems ""Henry Ott has literally 'written the book' on the subject of EMC. . . . He not only knows the subject, but has the rare ability to communicate that knowledge to others.""-EE Times Electromagnetic Compatibility Engineering is a completely revised, expanded, and updated version of Henry Ott's popular book Noise Reduction Techniques in Electronic Systems. It reflects the most recent developments in the field of electromagnetic compatibility (EMC) and noise reduction¿and their practical applications t

  5. Electromagnetic fields and interactions

    CERN Document Server

    Becker, Richard L


    For more than a century, ""Becker"" and its forerunner, ""Abraham-Becker,"" have served as the bible of electromagnetic theory for countless students. This definitive translation of the physics classic features both volumes of the original text.Volume I, on electromagnetic theory, includes an introduction to vector and tensor calculus, the electrostatic field, electric current and the field, and the theory of relativity. The second volume comprises a self-contained introduction to quantum theory that covers the classical principles of electron theory and quantum mechanics, problems involving

  6. Electromagnetic clutches and couplings

    CERN Document Server

    Vorob'Yeva, T M; Fry, D W; Higinbotham, W


    Electromagnetic Clutches and Couplings contains a detailed description of U.S.S.R. electromagnetic friction clutches, magnetic couplings, and magnetic particle couplings. This book is divided into four chapters. The first chapter discusses the design and construction of magnetic (solenoid-operated) couplings, which are very quick-acting devices and used in low power high-speed servo-systems. Chapter 2 describes the possible fields of application, design, construction, and utilization of magnetic particle couplings. The aspects of construction, design, and utilization of induction clutches (sli

  7. The theory of electromagnetism

    CERN Document Server

    Jones, D S


    The Theory of the Electomagnetism covers the behavior of electromagnetic fields and those parts of applied mathematics necessary to discover this behavior. This book is composed of 11 chapters that emphasize the Maxwell's equations. The first chapter is concerned with the general properties of solutions of Maxwell's equations in matter, which has certain macroscopic properties. The succeeding chapters consider specific problems in electromagnetism, including the determination of the field produced by a variable charge, first in isolation and then in the surface distributions of an antenna. The

  8. Improved Electromagnetic Brake (United States)

    Martin, Toby B.


    A proposed design for an electromagnetic brake would increase the reliability while reducing the number of parts and the weight, relative to a prior commercially available electromagnetic brake. The reductions of weight and the number of parts could also lead to a reduction of cost. A description of the commercial brake is prerequisite to a description of the proposed electromagnetic brake. The commercial brake (see upper part of figure) includes (1) a permanent magnet and an electromagnet coil on a stator and (2) a rotor that includes a steel contact plate mounted, with tension spring loading, on an aluminum hub. The stator is mounted securely on a stationary object, which would ordinarily be the housing of a gear drive or a motor. The rotor is mounted on the shaft of the gear drive or motor. The commercial brake nominally operates in a fail-safe (in the sense of normally braking) mode: In the absence of current in the electromagnet coil, the permanent magnet pulls the contact plate, against the spring tension, into contact with the stator. To release the brake, one excites the electromagnet with a current of the magnitude and polarity chosen to cancel the magnetic flux of the permanent magnet, thereby enabling the spring tension to pull the contact plate out of contact with the stator. The fail-safe operation of the commercial brake depends on careful mounting of the rotor in relation to the stator. The rotor/stator gap must be set with a tolerance between 10 and 15 mils (between about 0.25 and about 0.38 mm). If the gap or the contact pad is thicker than the maximum allowable value, then the permanent magnetic field will not be strong enough to pull the steel plate across the gap. (For this reason, any contact pad between the contact plate and the stator must also be correspondingly thin.) If the gap exceeds the maximum allowable value because of shaft end play, it becomes impossible to set the brake by turning off the electromagnet current. Although it may

  9. Lectures on electromagnetism

    CERN Document Server

    Das, Ashok


    These lecture notes on electromagnetism have evolved from graduate and undergraduate EM theory courses given by the author at the University of Rochester, with the basics presented with clarity and his characteristic attention to detail. The thirteen chapters cover, in logical sequence, topics ranging from electrostatics, magnetostatics and Maxwell's equations to plasmas and radiation. Boundary value problems are treated extensively, as are wave guides, electromagnetic interactions and fields. This second edition comprises many of the topics expanded with more details on the derivation of vari

  10. Volcano-electromagnetic effects (United States)

    Johnston, Malcolm J. S.


    Volcano-electromagnetic effects—electromagnetic (EM) signals generated by volcanic activity—derive from a variety of physical processes. These include piezomagnetic effects, electrokinetic effects, fluid vaporization, thermal demagnetization/remagnetization, resistivity changes, thermochemical effects, magnetohydrodynamic effects, and blast-excited traveling ionospheric disturbances (TIDs). Identification of different physical processes and their interdependence is often possible with multiparameter monitoring, now common on volcanoes, since many of these processes occur with different timescales and some are simultaneously identified in other geophysical data (deformation, seismic, gas, ionospheric disturbances, etc.). EM monitoring plays an important part in understanding these processes.

  11. Loss of Sh3gl2/Endophilin A1 Is a Common Event in Urothelial Carcinoma that Promotes Malignant Behavior

    Directory of Open Access Journals (Sweden)

    Shyama Majumdar


    Full Text Available Urothelial carcinoma (UC causes substantial morbidity and mortality worldwide. However, the molecular mechanisms underlying urothelial cancer development and tumor progression are still largely unknown. Using informatics analysis, we identified Sh3gl2 (endophilin A1 as a bladder urothelium-enriched transcript. The gene encoding Sh3gl2 is located on chromosome 9p, a region frequently altered in UC. Sh3gl2 is known to regulate endocytosis of receptor tyrosine kinases implicated in oncogenesis, such as the epidermal growth factor receptor (EGFR and c-Met. However, its role in UC pathogenesis is unknown. Informatics analysis of expression profiles as well as immunohistochemical staining of tissue microarrays revealed Sh3gl2 expression to be decreased in UC specimens compared to nontumor tissues. Loss of Sh3gl2 was associated with increasing tumor grade and with muscle invasion, which is a reliable predictor of metastatic disease and cancer-derived mortality. Sh3gl2 expression was undetectable in 19 of 20 human UC cell lines but preserved in the low-grade cell line RT4. Stable silencing of Sh3gl2 in RT4 cells by RNA interference 1 enhanced proliferation and colony formation in vitro, 2 inhibited EGF-induced EGFR internalization and increased EGFR activation, 3 stimulated phosphorylation of Src family kinases and STAT3, and 4 promoted growth of RT4 xenografts in subrenal capsule tissue recombination experiments. Conversely, forced re-expression of Sh3gl2 in T24 cells and silenced RT4 clones attenuated oncogenic behaviors, including growth and migration. Together, these findings identify loss of Sh3gl2 as a frequent event in UC development that promotes disease progression.

  12. Loss of Sh3gl2/endophilin A1 is a common event in urothelial carcinoma that promotes malignant behavior. (United States)

    Majumdar, Shyama; Gong, Edward M; Di Vizio, Dolores; Dreyfuss, Jonathan; Degraff, David J; Hager, Martin H; Park, Peter J; Bellmunt, Joaquim; Matusik, Robert J; Rosenberg, Jonathan E; Adam, Rosalyn M


    Urothelial carcinoma (UC) causes substantial morbidity and mortality worldwide. However, the molecular mechanisms underlying urothelial cancer development and tumor progression are still largely unknown. Using informatics analysis, we identified Sh3gl2 (endophilin A1) as a bladder urothelium-enriched transcript. The gene encoding Sh3gl2 is located on chromosome 9p, a region frequently altered in UC. Sh3gl2 is known to regulate endocytosis of receptor tyrosine kinases implicated in oncogenesis, such as the epidermal growth factor receptor (EGFR) and c-Met. However, its role in UC pathogenesis is unknown. Informatics analysis of expression profiles as well as immunohistochemical staining of tissue microarrays revealed Sh3gl2 expression to be decreased in UC specimens compared to nontumor tissues. Loss of Sh3gl2 was associated with increasing tumor grade and with muscle invasion, which is a reliable predictor of metastatic disease and cancer-derived mortality. Sh3gl2 expression was undetectable in 19 of 20 human UC cell lines but preserved in the low-grade cell line RT4. Stable silencing of Sh3gl2 in RT4 cells by RNA interference 1) enhanced proliferation and colony formation in vitro, 2) inhibited EGF-induced EGFR internalization and increased EGFR activation, 3) stimulated phosphorylation of Src family kinases and STAT3, and 4) promoted growth of RT4 xenografts in subrenal capsule tissue recombination experiments. Conversely, forced re-expression of Sh3gl2 in T24 cells and silenced RT4 clones attenuated oncogenic behaviors, including growth and migration. Together, these findings identify loss of Sh3gl2 as a frequent event in UC development that promotes disease progression.

  13. Electromagnetic fields in stratified media

    CERN Document Server

    Li, Kai


    Dealing with an important branch of electromagnetic theory with many useful applications in subsurface communication, radar, and geophysical prospecting and diagnostics, this book introduces electromagnetic theory and wave propagation in complex media.


    National Research Council Canada - National Science Library

    Marius Lolea; Simona Dzitac


      This paper presents a brief statement of electromagnetic pollution generated by public sources of electromagnetic field, wich are distributed on the territory of City of Oradea, Bihor County, Romania...

  15. Glândulas intramandibulares de Formicidae (Ponerinae, Myrmicinae): desenvolvimento e seus componentes químicos


    Martins, Luiza Carla Barbosa


    As formigas são especialmente ricas em glândulas exócrinas que variam na sua natureza estrutural, química e complexidade funcional, e esta riqueza em glândulas exócrinas talvez seja o grande ponto de seu sucesso biológico. Este estudo focalizou as glândulas intramandibulares de formigas primitivas Ponerini (Ponerinae) e derivadas Attini (Myrmicinae) quanto ao desenvolvimento de formas imaturas, diferenciação entre castas e componentes químicos, contribuindo para a compreensão dos mecanismos...

  16. glUCModel: a monitoring and modeling system for chronic diseases applied to diabetes. (United States)

    Hidalgo, J Ignacio; Maqueda, Esther; Risco-Martín, José L; Cuesta-Infante, Alfredo; Colmenar, J Manuel; Nobel, Javier


    Chronic patients must carry out a rigorous control of diverse factors in their lives. Diet, sport activity, medical analysis or blood glucose levels are some of them. This is a hard task, because some of these controls are performed very often, for instance some diabetics measure their glucose levels several times every day, or patients with chronic renal disease, a progressive loss in renal function, should strictly control their blood pressure and diet. In order to facilitate this task to both the patient and the physician, we have developed a web application for chronic diseases control which we have particularized to diabetes. This system, called glUCModel, improves the communication and interaction between patients and doctors, and eventually the quality of life of the former. Through a web application, patients can upload their personal and medical data, which are stored in a centralized database. In this way, doctors can consult this information and have a better control over patient records. glUCModel also presents three novelties in the disease management: a recommender system, an e-learning course and a module for automatic generation of glucose levels model. The recommender system uses Case Based Reasoning. It provides automatic recommendations to the patient, based on the recorded data and physician preferences, to improve their habits and knowledge about the disease. The e-learning course provides patients a space to consult information about the illness, and also to assess their own knowledge about the disease. Blood glucose levels are modeled by means of evolutionary computation, allowing to predict glucose levels using particular features of each patient. glUCModel was developed as a system where a web layer allows the access of the users from any device connected to the Internet, like desktop computers, tablets or mobile phones. Copyright © 2014 Elsevier Inc. All rights reserved.

  17. Einsatz der Laserinduzierten Glühtechnik zur Charakterisierung von Nanopartikeln unter produktionsnahen Bedingungen


    Dankers, Stefan


    Für die Bestimmung der Primärteilchengröße von Nanopartikeln wird im Rahmen dieser Arbeit die laserinduzierte Glühtechnik (Laser-Induced Incandescence - LII) eingesetzt. Diese ist ein optisches Messverfahren, das auf der Aufheizung der nanoskaligen Teilchen durch einen Laserpuls und der anschließenden Detektion der Wärmestrahlung beruht. Durch Untersuchung des Abkühlverhaltens der Teilchen kann deren Primärpartikelgröße ermittelt werden, da kleine Teilchen schneller abkühlen. Es wird die Anwe...

  18. Interactive WebGL-based 3D visualizations for EAST experiment

    Energy Technology Data Exchange (ETDEWEB)

    Xia, J.Y., E-mail: [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui (China); University of Science and Technology of China, Hefei, Anhui (China); Xiao, B.J. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui (China); University of Science and Technology of China, Hefei, Anhui (China); Li, Dan [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui (China); Wang, K.R. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui (China); University of Science and Technology of China, Hefei, Anhui (China)


    Highlights: • Developing a user-friendly interface to visualize the EAST experimental data and the device is important to scientists and engineers. • The Web3D visualization system is based on HTML5 and WebGL, which runs without the need for plug-ins or third party components. • The interactive WebGL-based 3D visualization system is a web-portal integrating EAST 3D models, experimental data and plasma videos. • The original CAD model was discretized into different layers with different simplification to enable realistic rendering and improve performance. - Abstract: In recent years EAST (Experimental Advanced Superconducting Tokamak) experimental data are being shared and analyzed by an increasing number of international collaborators. Developing a user-friendly interface to visualize the data, meta data and the relevant parts of the device is becoming more and more important to aid scientists and engineers. Compared with the previous virtual EAST system based on VRML/Java3D [1] (Li et al., 2014), a new technology is being adopted to create a 3D visualization system based on HTML5 and WebGL, which runs without the need for plug-ins or third party components. The interactive WebGL-based 3D visualization system is a web-portal integrating EAST 3D models, experimental data and plasma videos. It offers a highly interactive interface allowing scientists to roam inside EAST device and view the complex 3-D structure of the machine. It includes technical details of the device and various diagnostic components, and provides visualization of diagnostic metadata with a direct link to each signal name and its stored data. In order for the quick access to the device 3D model, the original CAD model was discretized into different layers with different simplification. It allows users to search for plasma videos in any experiment and analyze the video frame by frame. In this paper, we present the implementation details to enable realistic rendering and improve performance.

  19. Antike Gläser und versteinertes Elfenbein: Röntgenanalyse in der Kunst (United States)

    Reiche, Ina; Radtke, Martin; Brouder, Christian


    Physikalische Methoden der Archäometrie liefern den Kunsthistorikern und Archäologen wichtige Informationen. Materialspezifische Größen geben Aufschluss über Alter, Authentizität, Herkunft und Herstellungstechniken sowie Alterserscheinungen von Gegenständen. Insbesondere die Röntgenanalyse hat in jüngster Zeit wertvolle Beiträge hierzu geliefert. Dabei spannt sich ein weiter Bogen von den Mysterien ägyptischer Augenschminke über die Herstellungstechnik römischer Gläser bis zur Authentizitätsuntersuchung mittelalterlicher Silberstiftzeichnungen.

  20. Ideal and nonideal electromagnetic cloaks


    Zharova, Nina A.; Shadrivov, Ilya V.; Zharov, Alexander A.; Kivshar, Yuri S.


    We employ the analytical results for the spatial transformation of the electromagnetic fields to obtain and analyze explicit expressions for the structure of the electromagnetic fields in invisibility cloaks, beam splitters, and field concentrators. We study the efficiency of nonideal electromagnetic cloaks and discuss the effect of scattering losses on the cloak invisibility.

  1. Electromagnetic radiation detector (United States)

    Benson, Jay L.; Hansen, Gordon J.


    An electromagnetic radiation detector including a collimating window, a cathode member having a photoelectric emissive material surface angularly disposed to said window whereby radiation is impinged thereon at acute angles, an anode, separated from the cathode member by an evacuated space, for collecting photoelectrons emitted from the emissive cathode surface, and a negatively biased, high transmissive grid disposed between the cathode member and anode.

  2. Introduction to electromagnetic compatibility (United States)

    Paul, Clayton R.

    A formal and extensive treatment of electromagnetic compatibility (EMC) is presented. Basic principles are reviewed in detail, including reasons for EMC in electronic design. Also discussed are: nonideal behavior of components, signal spectra, radiated emission and susceptibility, conducted emissions and susceptibility, crosstalk, shielding, electrostatic discharge, and system design for EMC.

  3. What Are Electromagnetic Fields? (United States)

    ... them to quickly heat food. At radio frequencies, electric and magnetic fields are closely interrelated and we typically measure their levels as power densities in watts per square metre (W/m 2 ). Key points: The electromagnetic spectrum encompasses both natural and ...

  4. Electromagnetic distance measurement

    CERN Document Server


    This book brings together the work of forty-eight geodesists from twenty-five countries. They discuss various new electromagnetic distance measurement (EDM) instruments - among them the Tellurometer, Geodimeter, and air- and satellite-borne systems - and investigate the complex sources of error.

  5. Simple Superconducting "Permanent" Electromagnet (United States)

    Israelson, Ulf E.; Strayer, Donald M.


    Proposed short tube of high-temperature-superconducting material like YBa2Cu3O7 acts as strong electromagnet that flows as long as magnetic field remains below critical value and temperature of cylinder maintained sufficiently below superconducting-transition temperature. Design exploits maximally anisotropy of high-temperature-superconducting material.

  6. Nanofocusing of electromagnetic radiation

    DEFF Research Database (Denmark)

    Gramotnev, D. K.; Bozhevolnyi, Sergey I.


    Nanofocusing of electromagnetic radiation, that is, reducing the cross sections of propagating optical modes far beyond the diffraction limit in dielectric media, can be achieved in tapered metal-dielectric waveguides that support surface plasmon-polariton modes. Although the main principles...

  7. "Hearing" Electromagnetic Waves (United States)

    Rojo, Marta; Munoz, Juan


    In this work, an educational experience is described in which a microwave communication link is used to make students aware that all electromagnetic waves have the same physical nature and properties. Experimental demonstrations are linked to theoretical concepts to increase comprehension of the physical principles underlying electromagnetic…

  8. Electromagnetic structure of nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Arnold, R.G.


    A brief review is given of selected topics in the electromagnetic structure of nucleons and nuclei, including nucleon form factors from both quantum chromodynamics and electron scattering data, measurements of the deuteron and triton form factors, quasi-elastic scattering, and the EMC effect. 47 refs., 13 figs. (LEW)

  9. Faraday: Father of Electromagnetism

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 7; Issue 3. Faraday: Father of Electromagnetism. S V Bhat. General Article Volume 7 Issue 3 March 2002 pp 46-50. Fulltext. Click here to view fulltext PDF. Permanent link: Keywords. Faraday ...

  10. Shielding of Electronic Systems against Transient Electromagnetic Interferences

    Directory of Open Access Journals (Sweden)

    H. Herlemann


    Full Text Available In order to protect electronic systems against the effects of transient electromagnetic interferences, shields made of electrically conductive material can be used. The subject of this paper is an electrically conductive textile. When applying the shield, a reliable measure is needed in order to determine the effectiveness of the shield to protect against electromagnetic pulses. For this purpose, a time domain measurement technique is presented using double exponential pulses. With these pulses, the susceptibility of an operating electronic device with and without the shield is determined. As a criterion of quality of a shield, the breakdown failure rate found in both cases is compared.

  11. Anomalous electromagnetic coupling via entanglement at the nanoscale (United States)

    Slepyan, Gregory; Boag, Amir; Mordachev, Vladimir; Sinkevich, Eugene; Maksimenko, Sergey; Kuzhir, Polina; Miano, Giovanni; Portnoi, Mikhail E.; Maffucci, Antonio


    Understanding unwanted mutual interactions between devices at the nanoscale is crucial for the study of the electromagnetic compatibility in nanoelectronic and nanophotonic systems. Anomalous electromagnetic coupling (crosstalk) between nanodevices may arise from the combination of electromagnetic interaction and quantum entanglement. In this paper we study in detail the crosstalk between two identical nanodevices, each consisting of a quantum emitter (atom, quantum dot, etc), capacitively coupled to a pair of nanoelectrodes. Using the generalized susceptibility concept, the overall system is modeled as a two-port within the framework of the electrical circuit theory and it is characterized by the admittance matrix. We show that the entanglement changes dramatically the physical picture of the electromagnetic crosstalk. In particular, the excitation produced in one of the ports may be redistributed in equal parts between both the ports, in spite of the rather small electromagnetic interactions. Such an anomalous crosstalk is expected to appear at optical frequencies in lateral GaAs double quantum dots. A possible experimental set up is also discussed. The classical concepts of interference in the operation of electronic devices, which have been known since the early days of radio-communications and are associated with electromagnetic compatibility, should then be reconsidered at the nanoscale.

  12. Ocorrência e morfometria de glândulas tegumentares abdominais em Apis mellifera L. (Hymenoptera, Apidae

    Directory of Open Access Journals (Sweden)

    Marcia Heloiza Vilas Boas Mota


    Full Text Available Apis mellifera L. apresenta três diferentes tipos de glândulas abdominais: (i glândulas tergais unicelulares, representadas por: a glândulas de Koschenikow, situadas no VIII tergo abdominal de operárias e rainhas: b glândulas de Nassanoff ou glândulas de cheiro, localizadas no VII tergo das operárias: c glândulas de Renner e Baumann, localizadas nos tergos III, IV e V das rainhas; (ii glândulas epiteliais, representadas pelas glândulas de cera das abelhas operárias; (iii glândulas associadas ao ferrão: a ácidas; b básicas, ocorrendo em ambas as castas. O estudo do ciclo de desenvolvimento das glândulas abdominais foi realizado por meio de técnicas morfométricas, que consistiram em medidas diretas das células e dos diâmetros de seus núcleos e cálculo posterior de suas respectivas áreas. A ocorrência e a morfometria mostraram correlações entre o ciclo de desenvolvimento e a função das glândulas e o comportamento das abelhas.Apis mellifera L. presents threww different types of abdominal glands: (i unicelular tergal glands, represented by: a the Koschenikow glands, situated in the VIII abdominal tergum of workers and queens; b the Nassanoff glands or scent glands located in the VII tergum of workers; c the Renner and Baumann glands located in the III, IV and V terga of the queens; (ii epithelial glands, represented by wax glands of worker bees; (iii glands associated to the sting: a acid; b basic glands, occurring in both castes. The study of the developmental cycle of the abdominal glands was done by means of morfometric tecniques which consisted in direct measurements of the cells and their nuclei diameters and further calculation of their respective areas: The occurrence and morphometric studies showed correlations between the developmental cycle and the glands function and bees behavior.

  13. Electromagnetic gyrokinetic simulation in GTS (United States)

    Ma, Chenhao; Wang, Weixing; Startsev, Edward; Lee, W. W.; Ethier, Stephane


    We report the recent development in the electromagnetic simulations for general toroidal geometry based on the particle-in-cell gyrokinetic code GTS. Because of the cancellation problem, the EM gyrokinetic simulation has numerical difficulties in the MHD limit where k⊥ρi -> 0 and/or β >me /mi . Recently several approaches has been developed to circumvent this problem: (1) p∥ formulation with analytical skin term iteratively approximated by simulation particles (Yang Chen), (2) A modified p∥ formulation with ∫ dtE∥ used in place of A∥ (Mishichenko); (3) A conservative theme where the electron density perturbation for the Poisson equation is calculated from an electron continuity equation (Bao) ; (4) double-split-weight scheme with two weights, one for Poisson equation and one for time derivative of Ampere's law, each with different splits designed to remove large terms from Vlasov equation (Startsev). These algorithms are being implemented into GTS framework for general toroidal geometry. The performance of these different algorithms will be compared for various EM modes.

  14. bioWeb3D: an online webGL 3D data visualisation tool. (United States)

    Pettit, Jean-Baptiste; Marioni, John C


    Data visualization is critical for interpreting biological data. However, in practice it can prove to be a bottleneck for non trained researchers; this is especially true for three dimensional (3D) data representation. Whilst existing software can provide all necessary functionalities to represent and manipulate biological 3D datasets, very few are easily accessible (browser based), cross platform and accessible to non-expert users. An online HTML5/WebGL based 3D visualisation tool has been developed to allow biologists to quickly and easily view interactive and customizable three dimensional representations of their data along with multiple layers of information. Using the WebGL library Three.js written in Javascript, bioWeb3D allows the simultaneous visualisation of multiple large datasets inputted via a simple JSON, XML or CSV file, which can be read and analysed locally thanks to HTML5 capabilities. Using basic 3D representation techniques in a technologically innovative context, we provide a program that is not intended to compete with professional 3D representation software, but that instead enables a quick and intuitive representation of reasonably large 3D datasets.

  15. Glässer's disease in piglets produced by intraperitoneal inoculation with Haemophilus parasuis. (United States)

    Morozumi, T; Hiramune, T; Kobayashi, K


    Haemophilus parasuis was inoculated into the abdominal cavities of piglets. Its infective doses varied from 1.4 X 10(6) to 1.0 X 10(9) organisms. When inoculated with 1.0 X 10(9) or 1.6 X 10(8) organisms, piglets were affected with fibrinous polyserositis associated with arthritis and purulent meningitis. The three disorders were considered to be characteristic of Glässer's disease. Septicemia was also found in many of the infected piglets, some of which died within a few days after inoculation. No lesions were observed in piglets inoculated with 1.4 X 10(7) or 1.4 X 10(6) organisms. It was difficult to reisolate H.parasuis from lesions, especially those in the abdominal cavities of piglets killed on the 6th day after inoculation. Agglutinating and complement-fixing antibodies were present in the piglets with Glässer's syndrome examined on the 6th day after inoculation. Neither of them was detected in any piglet manifesting no clinical signs, except transient pyrexia.

  16. HTML5 games creating fun with HTML5, CSS3, and WebGL

    CERN Document Server

    Seidelin, Jacob


    Discover new opportunities for building 2D and 3D games with HTML5 The newest iteration of HTML, HTML5 can be used with JavaScript, CSS3, and WebGL to create beautiful, unique, engaging games that can be played on the web or mobile devices like the iPad or Android phones. Gone are the days where games were only possible with plugin technologies such as Flash and this cutting-edge book shows you how to utilize the latest open web technologies to create a game from scratch using Canvas, HTML5 Audio, WebGL, and WebSockets. You'll discover how to build a framework on which you will create your HTML5 game. Then each successive chapter covers a new aspect of the game, including user input, sound, multiplayer functionality, 2D and 3D graphics, and more. Aims directly at a new way to develop games for the web through the use of HTML5 Demonstrates how to make iOS and Android web apps Explains how to capture player input; create 3D graphics; and incorporate textures, lighting, and sound Guides you through the proce...

  17. Fast segmentation of satellite images using SLIC, WebGL and Google Earth Engine (United States)

    Donchyts, Gennadii; Baart, Fedor; Gorelick, Noel; Eisemann, Elmar; van de Giesen, Nick


    Google Earth Engine (GEE) is a parallel geospatial processing platform, which harmonizes access to petabytes of freely available satellite images. It provides a very rich API, allowing development of dedicated algorithms to extract useful geospatial information from these images. At the same time, modern GPUs provide thousands of computing cores, which are mostly not utilized in this context. In the last years, WebGL became a popular and well-supported API, allowing fast image processing directly in web browsers. In this work, we will evaluate the applicability of WebGL to enable fast segmentation of satellite images. A new implementation of a Simple Linear Iterative Clustering (SLIC) algorithm using GPU shaders will be presented. SLIC is a simple and efficient method to decompose an image in visually homogeneous regions. It adapts a k-means clustering approach to generate superpixels efficiently. While this approach will be hard to scale, due to a significant amount of data to be transferred to the client, it should significantly improve exploratory possibilities and simplify development of dedicated algorithms for geoscience applications. Our prototype implementation will be used to improve surface water detection of the reservoirs using multispectral satellite imagery.

  18. A massive hypergiant star as the progenitor of the supernova SN 2005gl. (United States)

    Gal-Yam, A; Leonard, D C


    Our understanding of the evolution of massive stars before their final explosions as supernovae is incomplete, from both an observational and a theoretical standpoint. A key missing piece in the supernova puzzle is the difficulty of identifying and studying progenitor stars. In only a single case-that of supernova SN 1987A in the Large Magellanic Cloud-has a star been detected at the supernova location before the explosion, and been subsequently shown to have vanished after the supernova event. The progenitor of SN 1987A was a blue supergiant, which required a rethink of stellar evolution models. The progenitor of supernova SN 2005gl was proposed to be an extremely luminous object, but the association was not robustly established (it was not even clear that the putative progenitor was a single luminous star). Here we report that the previously proposed object was indeed the progenitor star of SN 2005gl. This very massive star was likely a luminous blue variable that standard stellar evolution predicts should not have exploded in that state.

  19. Open Source, Browser-based WebGL Point Cloud Visualization (United States)

    Butler, H.; Finnegan, D. C.; Gadomski, P. J.; Verma, U. K.


    Point cloud data, in the form of Light Detection and Ranging (LiDAR), RADAR, or semi-global matching (SGM) image processing, are rapidly becoming a foundational data type to quantify and characterize geospatial processes. Visualization of these data, due to overall volume and irregular arrangement, is often difficult. Technological advancement in web browsers, in the form of WebGL and HTML5, have made interactivity and visualization capabilities ubiquitously available which once only existed in desktop software. is an open source JavaScript application that provides point cloud visualization, exploitation, and compression features in a web-browser platform, reducing the reliance for client-based desktop applications. The wide reach of WebGL and browser-based technologies mean's capabilities can be delivered to a diverse list of devices -- from phones and tablets to high-end workstations -- with very little custom software development. These properties make an ideal open platform for researchers and software developers to communicate visualizations of complex and rich point cloud data to devices to which everyone has easy access.

  20. Electromagnetic wave energy converter (United States)

    Bailey, R. L. (Inventor)


    Electromagnetic wave energy is converted into electric power with an array of mutually insulated electromagnetic wave absorber elements each responsive to an electric field component of the wave as it impinges thereon. Each element includes a portion tapered in the direction of wave propagation to provide a relatively wideband response spectrum. Each element includes an output for deriving a voltage replica of the electric field variations intercepted by it. Adjacent elements are positioned relative to each other so that an electric field subsists between adjacent elements in response to the impinging wave. The electric field results in a voltage difference between adjacent elements that is fed to a rectifier to derive dc output power.

  1. Electromagnetic Polarizabilities of Mesons (United States)

    Aleksejevs, A.; Barkanova, S.


    The Chiral Perturbation Theory (CHPT) has been very successful in describing low-energy hadronic properties in the non-perturbative regime of Quantum Chromodynamics. The results of ChPT, many of which are currently under active experimental investigation, provide stringent predictions of many fundamental properties of hadrons, including quantities such as electromagnetic polarizabilities. Yet, even for the simplest hadronic system, a pion, we still have a broad spectrum of polarizability measurements (MARK II, VENUS, ALEPH, TPC/2g, CELLO, Belle, Crystal Ball). The meson polarizability can be accessed through Compton scattering, so we can measure it through Primakoff reaction. This paper will provide an analysis of the CHPT predictions of the SU(3) meson electromagnetic polarizabilities and outline their relationship to the Primakoff cross section at the kinematics relevant to the planned JLab experiments.

  2. The KLOE electromagnetic calorimeter

    CERN Document Server

    Adinolfi, M; Antonelli, A; Antonelli, M; Anulli, F; Barbiellini, G; Bencivenni, G; Bertolucci, Sergio; Bini, C; Bloise, C; Bocci, V; Bossi, F; Branchini, P; Cabibbo, G; Caloi, R; Campana, P; Casarsa, M; Cataldi, G; Ceradini, F; Cervelli, F; Ciambrone, P; De Lucia, E; De Simone, P; De Zorzi, G; Dell'Agnello, S; Denig, A; Di Domenico, A; Di Donato, C; Di Falco, S; Doria, A; Erriquez, O; Farilla, A; Ferrari, A; Ferrer, M L; Finocchiaro, G; Forti, C; Franceschi, A; Franzini, P; Gao, M L; Gatti, C; Gauzzi, P; Giannasi, A; Giovannella, S; Graziani, E; Han, H G; Han, S W; Huang, X; Incagli, M; Ingrosso, L; Keeble, L; Kim, W; Kuo, C; Lanfranchi, G; Lee-Franzini, J; Lomtadze, T A; Mao Chen Sheng; Martemyanov, M; Mei, W; Messi, R; Miscetti, S; Moccia, S; Moulson, M; Murtas, F; Müller, S; Pacciani, L; Palomba, M; Palutan, M; Pasqualucci, E; Passalacqua, L; Passeri, A; Picca, D; Pirozzi, G; Pontecorvo, L; Primavera, M; Santangelo, P; Santovetti, E; Saracino, G; Schamberger, R D; Sciascia, B; Scuri, F; Sfiligoi, I; Silano, P; Spadaro, T; Spiriti, E; Tortora, L; Valente, P; Valeriani, B; Venanzoni, G; Ventura, A; Wu, Y; Wölfle, S; Xie, Y G; Zema, P F; Zhang, C D; Zhang, J Q; Zhao, P P


    The KLOE detector was designed primarily for the study of CP violation in neutral kaon decays at DAPHINE, the Frascati phi-factory. The detector consists of a tracker and an electromagnetic calorimeter. A lead-scintillating-fiber sampling calorimeter satisfies best the requirements of the experiment, providing adequate energy resolution and superior timing accuracy. We describe in the following the construction of the calorimeter, its calibration and how the calorimeter information is used to obtain energy, point of entry and time of the arrival of photons, electrons and charged particles. With e sup + e sup - collision data at DAPHINE for an integrated luminosity of some 2 pb sup - sup 1 we find for electromagnetic showers, an energy resolution of 5.7%/sq root E(GeV) and a time resolution of 54/sq root E(GeV) ps. We also present a measurement of efficiency for low energy photons.

  3. Electromagnetic fields and waves

    CERN Document Server

    Iskander, Magdy F


    The latest edition of Electromagnetic Fields and Waves retains an authoritative, balanced approach, in-depth coverage, extensive analysis, and use of computational techniques to provide a complete understanding of electromagnetic—important to all electrical engineering students. An essential feature of this innovative text is the early introduction of Maxwell's equations, together with the quantifying experimental observations made by the pioneers who discovered electromagnetics. This approach directly links the mathematical relations in Maxwell's equations to real experiments and facilitates a fundamental understanding of wave propagation and use in modern practical applications, especially in today's wireless world. New and expanded topics include the conceptual relationship between Coulomb's law and Gauss's law for calculating electric fields, the relationship between Biot-Savart's and Ampere's laws and their use in calculating magnetic fields from current sources, the development of Faraday's law from e...

  4. Abscesso cervical gigante provocado por sialolitíase de glândula submandibular

    Directory of Open Access Journals (Sweden)

    Fernanda Fruet


    Full Text Available Introdução: As infecções cervicais profundas apresentam alta mortalidade, apesar da eficácia da antibioticoterapia atual. Uma das principais complicações é a obstrução das vias aéreas superiores. A principal causa dessas infecções é de origem odontogênica e, raramente, a infecção das glândulas salivares. Objetivo: Apresentar um caso de abscesso cervical profundo, cuja etiologia rara está associada à sialolitíase com origem em glândula submandibular. Metodologia: O caso foi acompanhado no serviço de Cabeça e Pescoço do Conjunto Hospitalar de Sorocaba (CHS e sua descrição embasada na literatura. Relato de Caso: Paciente iniciou quadro de dor localizada em região submandibular posterior direita, acompanhada de disfagia e dispneia contínua. Procurou atendimento médico na cidade de origem, onde recebeu antibioticoterapia. Evoluiu com insuficiência respiratória, necessitando de transferência para o serviço de emergência do CHS aos cuidados da equipe de Cabeça e Pescoço. Ao exame físico, apresentava edema, abaulamento e hiperemia da lateral direita do pescoço. A Tomografia Computadorizada evidenciou abscesso em espaço retro-faríngeo com compressão da parede posterior da orofaringe e hipofaringe, além de glândula submandibular direita aumentada e imagem de cálculo. Foi realizada a traqueostomia e a resolução cirúrgica por meio da drenagem do abscesso através da incisão transversa em colar. Conclusão: O caso apresentado mostra um abscesso cervical profundo causado por etiologia incomum, a sialolitíase, cujo diagnóstico precoce, seguido do tratamento adequado, poderiam ter evitado a evolução grave do paciente. Neste caso, a drenagem cirúrgica precoce mostra sua importância na prevenção de insuficiência respiratória.

  5. Morfologia da glândula mamária do quati (Nasua nasua

    Directory of Open Access Journals (Sweden)

    Juliana B. Casals


    Full Text Available Nasua nasua é um animal onívoro, encontrado em todo Brasil. A reprodução da espécie ocorre somente uma vez ao ano, na primavera. As fêmeas são matriarcas e amamentam suas crias até os 5 meses de idade, vivem com seus filhotes em bandos de até 30 indivíduos. Para descrição morfológica da glândula mamaria do Nasua nasua foram utilizados seis animais provenientes do Criatório Cientifico (Cecrimpas, Unifeob. Autorizado pelo Ibama (Proc.02027.002322/98-99. Para análise macroscópica um animal foi injetado com látex neoprene, sendo a artéria femoral injetada com látex de cor vermelha e a veia jugular de cor azul. Os demais animais foram fixados em solução aquosa a 10% de formaldeído. Para análise microscópica, fragmentos glandulares foram coletados e submetidos ao processo rotineiro, embebido em parafina e corados com Hematoxilina e Eosina, Picrossírius e Azul de Toluidina. Macroscopicamente foram evidenciados três pares de glândulas mamárias, sendo dois pares posicionados na região abdominal e um par na região inguinal. Microscopicamente, notou-se epitélio de revestimento externo das papilas mamárias, epitélio pavimentoso estratificado queratinizado, o qual seguia por toda glândula de forma irregular. Na entrada do óstio, o epitélio da epiderme era modificado ocorrendo uma transição de epitélio pavimentoso estratificado para um epitélio cúbico no ducto papilar. O parênquima glandular era caracteristicamente túbulo alveolar com células secretoras, evidenciado principalmente no animal lactente. Os resultados macroscópicos e microscópicos assemelham-se aos já descritos nas cadelas (Canis familiaris e os do Procyon cancrivorus pertencente à mesma família do quati, Família Procyonidae.

  6. Influência do consumo de etanol nas glândulas salivares

    Directory of Open Access Journals (Sweden)

    Carrard, Vinicius Coelho et al.


    Full Text Available Objetivos: Realizar uma revisão da literatura sobre os efeitos do consumo de etanol nas glândulas salivares. Fonte de dados: Foi realizada uma busca no banco de dados Medline, utilizando as palavras alcohol/ ethanol, salivary glands. Síntese dos dados: Tem sido observada na população uma elevação no consumo de bebidas alcoólicas pela população, ocasionando alterações em diversos sistemas. Aumento de volume das glândulas salivares e redução do fluxo salivar são freqüentes em indivíduos alcoolistas. Como a saliva tem propriedades protetoras, a redução do fluxo torna a boca mais suscetível a injúrias, como as relacionadas à cárie e à periodontite. Podem ser observadas alterações morfológicas, como acúmulo de tecido adiposo, hiperplasia dos ductos e redução da proporção de células acinares. O consumo de etanol é responsável ainda pela redução dos níveis de imunoglobulinas presentes na saliva. A degradação do etanol gera metabólitos tóxicos, como o acetaldeído, que podem modificar a função das glândulas salivares. Existe a possibilidade de a saliva redistribuir o acetaldeído na boca, potencializando o dano produzido pelo consumo de etanol. Além disso, outros mecanismos podem estar presentes, como redução das prostaglandinas, desnutrição, alterações do sistema imune e estresse oxidativo, este último envolvido na patogênese de uma série de doenças crônico-degenerativas, entre elas o câncer. Conclusões: Os pacientes alcoolistas devem receber uma atenção especial em relação aos cuidados bucais, pois suas condições locais e sistêmicas os tornam mais suscetíveis a doenças da boca, como cárie, periodontite e câncer.

  7. Introduction to electromagnetic theory

    CERN Document Server

    Owen, George E


    A direct, stimulating approach to electromagnetic theory, this text employs matrices and matrix methods for the simple development of broad theorems. The author uses vector representation throughout the book, with numerous applications of Poisson's equation and the Laplace equation (the latter occurring in both electronics and magnetic media). Contents include the electrostatics of point charges, distributions of charge, conductors and dielectrics, currents and circuits, and the Lorentz force and the magnetic field. Additional topics comprise the magnetic field of steady currents, induced ele

  8. Electromagnetic Interaction Equations


    Zinoviev, Yury M.


    For the electromagnetic interaction of two particles the relativistic quantum mechanics equations are proposed. These equations are solved for the case when one particle has a small mass and moves freely. The initial wave functions are supposed to be concentrated at the coordinates origin. The energy spectrum of another particle wave function is defined by the initial wave function of the free moving particle. Choosing the initial wave function of the free moving particle it is possible to ob...

  9. Gravitation and electromagnetism


    Sidharth, B. G.


    Maxwell's equations comprise both electromagnetic and gravitational fields. The transverse part of the vector potential belongs to magnetism, the longitudinal one is concerned with gravitation. The Coulomb gauge indicates that longitudinal components of the fields propagate instantaneously. The delta-function singularity of the field of the divergence of the vector potential, referred to as the dilatation center, represents an elementary agent of gravitation. Viewing a particle as a source or...

  10. Double Swing

    DEFF Research Database (Denmark)

    Clausen, Lisbeth


    There are two main streams of understanding intercultural communication. The “classic” transmission models include the basic elements of communication involved in sending messages from a sender to a receiver. These models enable analysis of all communication elements and effects by focusing...... on sameness in communication. In contrast, Muneo Jay Yoshikawa's “double-swing” model of intercultural communication between the East and West is based on an eastern understanding of dialogue, collaborative communication, and co-creation of meaning. The double-swing model enables an understanding...... of communication as an ongoing encounter where both sender and receiver have mutual respect. It has four modes of communication: the ethnocentric, the dialectic, the control, and the dialogic. Both models have something to offer intercultural communication, but the double-swing model enables a worldview...

  11. GPU acceleration for digitally reconstructed radiographs using bindless texture objects and CUDA/OpenGL interoperability. (United States)

    Abdellah, Marwan; Eldeib, Ayman; Owis, Mohamed I


    This paper features an advanced implementation of the X-ray rendering algorithm that harnesses the giant computing power of the current commodity graphics processors to accelerate the generation of high resolution digitally reconstructed radiographs (DRRs). The presented pipeline exploits the latest features of NVIDIA Graphics Processing Unit (GPU) architectures, mainly bindless texture objects and dynamic parallelism. The rendering throughput is substantially improved by exploiting the interoperability mechanisms between CUDA and OpenGL. The benchmarks of our optimized rendering pipeline reflect its capability of generating DRRs with resolutions of 2048(2) and 4096(2) at interactive and semi interactive frame-rates using an NVIDIA GeForce 970 GTX device.

  12. Tratamiento quirúrgico de la glándula parótida


    Alonso Castañeira, Ignacio; Escapa Garrachón, José María; Alonso Treceño, José Luis


    [ES]Introducción y objetivo: La cirugía de la glándula parótida es de especial interés entre las cirugías de cabeza y cuello debido a la desproporción entre el alto porcentaje de patología benigna y las graves consecuencias estéticas que se pueden derivar de una mala ejecución de la técnica, la prolongación del tiempo quirúrgico y la excesiva manipulación de las fibras nerviosas. En contraposición a esta alerta, el conocimiento anatómico de la celda parotídea así como de la base de cráneo nos...

  13. Non-diagonal boundary conditions for gl(1|1) super spin chains

    Energy Technology Data Exchange (ETDEWEB)

    Grabinski, Andre M; Frahm, Holger, E-mail: frahm@itp.uni-hannover.d [Institut fuer Theoretische Physik, Leibniz Universitaet Hannover, Appelstrasse 2, 30167 Hannover (Germany)


    We study a one-dimensional model of free fermions with gl(1|1) supersymmetry and demonstrate how non-diagonal boundary conditions can be incorporated into the framework of the graded quantum inverse scattering method (gQISM) by means of super matrices with entries from a superalgebra. For super Hermitian twists and open boundary conditions subject to a certain constraint, we solve the eigenvalue problem for the super transfermatrix by means of the graded algebraic Bethe ansatz technique (gABA) starting from a fermionic coherent state. For generic boundary conditions the algebraic Bethe ansatz cannot be applied. In this case the spectrum of the super transfermatrix is obtained from a functional relation.

  14. Tuberculosis primaria de la glándula suprarrenal: comunicación de dos casos

    Directory of Open Access Journals (Sweden)

    Natalia Coras


    Full Text Available En muchas áreas del mundo, la tuberculosis tiene gran prevalencia y sigue siendo la principal causa de insuficiencia suprarrenal. Clínicamente, esta enfermedad permanece sin sintomatología durante sus primeros estadios, debido a que la pérdida de la función adrenal suele ser progresiva; los síntomas tienen aparición gradual e insidiosa, en su mayoría inespecíficos. Presentamos el caso de dos mujeres con cuadro clínico de insuficiencia adrenal primaria crónica, con afección bilateral de ambas glándulas suprarrenales y resultado histopatológico de infección activa por tuberculosis.

  15. A browser-based event display for the CMS Experiment at the LHC using WebGL (United States)

    McCauley, T.


    Modern web browsers are powerful and sophisticated applications that support an ever-wider range of uses. One such use is rendering high-quality, GPU-accelerated, interactive 2D and 3D graphics in an HTML canvas. This can be done via WebGL, a JavaScript API based on OpenGL ES. Applications delivered via the browser have several distinct benefits for the developer and user. For example, they can be implemented using well-known and well-developed technologies, while distribution and use via a browser allows for rapid prototyping and deployment and ease of installation. In addition, delivery of applications via the browser allows for easy use on mobile, touch-enabled devices such as phones and tablets. iSpy WebGL is an application for visualization of events detected and reconstructed by the CMS Experiment at the Large Hadron Collider at CERN. The first event display developed for an LHC experiment to use WebGL, iSpy WebGL is a client-side application written in JavaScript, HTML, and CSS and uses the WebGL API three.js. iSpy WebGL is used for monitoring of CMS detector performance, for production of images and animations of CMS collisions events for the public, as a virtual reality application using Google Cardboard, and asa tool available for public education and outreach such as in the CERN Open Data Portal and the CMS masterclasses. We describe here its design, development, and usage as well as future plans.

  16. Measurement and analysis of electromagnetic pulses radiated from a charged copper pipe. Taidendo pipe kara hoshasareru denji pulse no sokutei to kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Masugi, M.; Murakawa, K.; Kuwabara, N.; Amemiya, F. (Nippon Telegraph and Telephone Corp., Tokyo (Japan))


    The purpose of this paper is to clarify the characteristics of electromagnetic wave accompanied with the electrostatic discharge. Experimental and analytical results on electromagnetic pulses radiated from a charged copper pipe are described. The electromagnetic pulses radiated from the copper pipe were measured by using electromagnetic field measuring antennas, such as loop antenna, biconical antenna, and double ridged guide antenna. Electromagnetic energy of the electromagnetic pulses was analyzed by integrating energy spectrums of three frequency domains of 1 to 30MHz, 30 to 300MHz, and 300 to 750MHz. Consequently, it was found that the radiated electromagnetic energy by discharge does not always increase in proportion to charging voltage. In addition, it was shown that high speed touch discharges by charging voltage of 7 or 10kV increase electromagnetic energy especially in the frequency region of 300 to 750MHz. 13 refs., 10 figs., 1 tab.

  17. Electromagnetic field and cosmic censorship

    CERN Document Server

    Düztaş, Koray


    We construct a gedanken experiment in which an extremal Kerr black hole interacts with a test electromagnetic field. Using Teukolsky's solutions for electromagnetic perturbations in Kerr spacetime, and the conservation laws imposed by the energy momentum tensor of the electromagnetic field and the Killing vectors of the spacetime, we prove that this interaction cannot convert the black hole into a naked singularity, thus cosmic censorship conjecture is not violated in this case.

  18. Electromagnetic Scattering and Material Characterization

    CERN Document Server

    Omar, Abbas


    Based on the author's more-than 30 years of experience, this first-of-its-kind volume presents a comprehensive and systematic analysis of electromagnetic fields and their scattering by material objects. The book considers all three categories of scattering environments commonly used for material measurements – unbounded regions, waveguides, and cavity resonators. The book covers such essential topics as electromagnetic field propagation, radiation, and scattering, containing mathematically rigorous approaches for the computation of electromagnetic fields and the explanation of their behavior.

  19. Electromagnetic Meissner-Effect Launcher (United States)

    Robertson, Glen A.


    Proposed electromagnetic Meissner-effect launching apparatus differs from previous electromagnetic launchers; no need for electromagnet coil on projectile. Result, no need for brush contacts and high-voltage commutation equipment to supply current directly to projectile coil, or for pulse circuitry to induce current in projectile coil if brush contacts not used. Compresses magnetic field surrounding rear surface of projectile, creating gradient of magnetic pressure pushing projectile forward.

  20. Glándula pediosa de moluscos terrestres y sus implicancias evolutivas, con énfasis en Megalobulimus

    Directory of Open Access Journals (Sweden)

    Victor Borda


    Full Text Available Se describe la anatomía de la glándula pediosa de cinco especies de Megalobulimus (Megalobulimidae, y son comparadas con gastrópodos pulmonados Succineidae, Orthalicidae, Helicidae y Veronicellidae. Una sinapomorfía considerada para el clado Stylommatophora es la presencia de una membrana que aísla a la glándula pediosa de la cavidad visceral. Las especies estudiadas mostraron un grado variable de sujeción de la glándula al pie, desde apenas sujeta por escasa fibras (Megalobulimus hasta aquella totalmente aislada por una membrana (Cantareus pasando por grados intermedios (Succinea y Bostryx. La glándula pediosa en la seudobabosa Heterovaginia limayana (Systellommatophora no está adherida al piso de la cavidad visceral. En Megalobulimus, la parte glandular es voluminosa y pende del techo de la cápsula, a diferencia de las otras especies en que los acinos glandulares están uniformemente adosados a la pared interna de la cápsula. Se describen nuevos caracteres para la glándula pediosa que mejoran la diagnosis del género Megalobulimus y su evaluación filogenética.

  1. A dioxin response element in the multiple cloning site of the pGL3 luciferase reporter influences transcriptional activity. (United States)

    Ochs, Sharon D; Liu, Jing; Fernando, Tharu M; Fecher, Roger A; Sulentic, Courtney E W


    Luciferase reporter plasmids (pGL3 backbone, Promega) have been utilized to characterize the transcriptional effects of the environmental contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and other aryl hydrocarbon receptor (AhR) ligands. Following ligand activation, the AhR and its dimerization partner AhR nuclear translocator (ARNT) regulate transcription by binding dioxin response elements (DREs) in regulatory regions of dioxin-sensitive genes. Upon sequencing of our luciferase reporters, we unexpectedly identified a DRE core motif within the multiple cloning site (mcsDRE) of the pGL3 luciferase plasmid backbone in a subset of our reporters. Therefore, the objective of this study was to determine if the mcsDRE inadvertently influences reporter activity. Utilizing deletional analysis we determined that the mcsDRE did significantly alter the transcriptional effect induced by TCDD. Since many chemicals have been shown to interact with the AhR and influence transcription through the DRE, the presence of the mcsDRE in the pGL3 luciferase plasmid may inappropriately influence promoter and enhancer analysis. As such, insertion of regulatory elements into pGL3 reporters should be designed to avoid retaining the mcsDRE core motif (GCGTG) and currently utilized pGL3 reporters should be evaluated for the presence of the mcsDRE. Copyright © 2012 Elsevier Ltd. All rights reserved.

  2. Force-free electromagnetic pulses in a laboratory plasma (United States)

    Stenzel, R. L.; Urrutia, J. M.


    A short, intense current pulse is drawn from an electrode immersed in a magnetized afterglow plasma. The induced magnetic field B(r,t) assumes the shape of a helical double vortex which propagates along B(0) through the uniform plasma as a whistler mode. The observations support a prediction of force-free (J x B + neE = 0) electromagnetic fields and solitary waves. Energy and helicity are approximately conserved.

  3. Electromagnetic Radiation Generated by Acoustic Excitation of Rock Samples (United States)

    Yavorovich, Lyudmila V.; Bespalko, Anatolii A.; Fedotov, Pavel I.; Baksht, Rina B.


    The paper presents an experiment on acoustic excitation of electromagnetic radiation (EMR) signals in skarn, sandstone, and magnetite ore samples. For the skarn and sandstone samples, the EMR signal amplitude was observed to decrease with increasing ultimate strength. Supposedly, this effect can be explained by assuming that EMR is generated when an acoustic wave propagates through an electrical double layer. The presence of piezoelectric inclusions ( e.g., quartz) in the magnetite ore enhances the analog EMR signal and its spectral components.

  4. Electromagnetic fields in biological systems

    National Research Council Canada - National Science Library

    Lin, James C


    "Focusing on exposure, induced fields, and absorbed energy, this volume covers the interaction of electromagnetic fields and waves with biological systems, spanning static fields to terahertz waves...

  5. Electromagnetic waves in stratified media

    CERN Document Server

    Wait, James R; Fock, V A; Wait, J R


    International Series of Monographs in Electromagnetic Waves, Volume 3: Electromagnetic Waves in Stratified Media provides information pertinent to the electromagnetic waves in media whose properties differ in one particular direction. This book discusses the important feature of the waves that enables communications at global distances. Organized into 13 chapters, this volume begins with an overview of the general analysis for the electromagnetic response of a plane stratified medium comprising of any number of parallel homogeneous layers. This text then explains the reflection of electromagne

  6. Battlefield Electromagnetic Environments Office (BEEO) (United States)

    Federal Laboratory Consortium — The Battlefield Electromagnetic Environments Office (BEEO) develops, maintains, and operates the Army Materiel Command (AMC) databases for spectrum management, per...

  7. Method of moments in electromagnetics

    CERN Document Server

    Gibson, Walton C


    Responding to the need for a clear, up-to-date introduction to the field, The Method of Moments in Electromagnetics explores surface integral equations in electromagnetics and presents their numerical solution using the method of moments (MOM) technique. It provides the numerical implementation aspects at a nuts-and-bolts level while discussing integral equations and electromagnetic theory at a higher level. The author covers a range of topics in this area, from the initial underpinnings of the MOM to its current applications. He first reviews the frequency-domain electromagnetic theory and t

  8. [Health effects of electromagnetic fields]. (United States)

    Röösli, Martin


    Use of electricity causes extremely low frequency magnetic fields (ELF-MF) and wireless communication devices emit radiofrequency electromagnetic fields (RF-EMF). Average ELF-MF exposure is mainly determined by high voltage power lines and transformers at home or at the workplace, whereas RF-EMF exposure is mainly caused by devices operating close to the body (mainly mobile and cordless phones). Health effects of EMF are controversially discussed. The IARC classified ELF-MF and RF-EMF as possible carcinogenic. Most consistent epidemiological evidence was found for an association between ELF-MF and childhood leukaemia. If causal, 1 - 4 percent of all childhood leukaemia cases could be attributed to ELF-MF. Epidemiological research provided some indications for an association between ELF-MF and Alzheimer's diseases as well as amyotrophic lateral sclerosis, although not entirely consistent. Regarding mobile phones and brain tumours, some studies observed an increased risk after heavy or long term use on the one hand. On the other hand, brain tumour incidence was not found to have increased in the last decade in Sweden, England or the US. Acute effects of RF-EMF on non-specific symptoms of ill health seem unlikely according to randomized and double blind provocation studies. However, epidemiological research on long term effects is still limited. Although from the current state of the scientific knowledge a large individual health risk from RF-EMF exposure is unlikely, even a small risk would have substantial public health relevance because of the widespread use of wireless communication technologies.

  9. Handbook of electromagnetic compatibility

    CERN Document Server


    This""know-how""book gives readers a concise understanding of the fundamentals of EMC, from basic mathematical and physical concepts through present, computer-age methods used in analysis, design, and tests. With contributions from leading experts in their fields, the text provides a comprehensive overview. Fortified with information on how to solve potential electromagnetic interference (EMI) problems that may arise in electronic design, practitioners will be betterable to grasp the latest techniques, trends, and applications of this increasingly important engineering discipline.Handbook of E

  10. Introduction to electromagnetic engineering

    CERN Document Server

    Harrington, Roger E


    This study of electromagnetic theory introduces students to a broad range of quantities and concepts, imparting the necessary vector analysis and associated mathematics and reinforcing its teachings with several elementary field problems. Based on circuit theory rather than on the classical force-relationship approach, the text uses the theory of electric circuits to provide a system of experiments already familiar to the electrical engineer; a series of field concepts are then introduced as a logical extension of circuit theory. Virtually unobtainable elsewhere, this text was written by a pr

  11. Electromagnetic Meissner effect launcher (United States)

    Robertson, Glen A. (Inventor)


    An electromagnetic projectile launcher provides acceleration of a superconducting projectile through the diamagnetic repulsion of the superconducting projectile. A superconducting layer is provided aft of the projectile, either directly on the projectile or on a platform upon which the projectile is carried, and a traveling magnetic field is caused to propagate along a magnetic field drive coil in which the projectile is disposed. The resulting diamagnetic repulsion between the superconducting projectile and the traveling magnetic field causes the projectile to be propelled along the coil. In one embodiment, a segmented drive coil is used to generate the traveling magnetic field.

  12. Direcionadores de preferência e perfil sensorial de pães isentos de glúten e sacarose


    Natália Manzatti Machado Alencar


    Resumo: Na atualidade a doença celíaca atinge aproximadamente 1% da população do mundo, e cerca de 3,1% dos pacientes com diabetes mellitus tipo I. A doença celíaca é caracterizada pela atrofia da mucosa intestinal na parte proximal e pela permanente intolerância ao glúten. Seu tratamento consiste em uma dieta isenta de glúten. Novas estratégias tem sido utilizadas para a fabricação de produtos de panificação isentos de glúten e sacarose, que se referem à utilização de pseudocereais, tais com...

  13. The Murid Herpesvirus-4 gL regulates an entry-associated conformation change in gH.

    Directory of Open Access Journals (Sweden)

    Laurent Gillet


    Full Text Available The glycoprotein H (gH/gL heterodimer is crucial for herpesvirus membrane fusion. Yet how it functions is not well understood. The Murid Herpesvirus-4 gH, like that of other herpesviruses, adopts its normal virion conformation by associating with gL. However, gH switched back to a gL-independent conformation after virion endocytosis. This switch coincided with a conformation switch in gB and with capsid release. Virions lacking gL constitutively expressed the down-stream form of gH, prematurely switched gB to its down-stream form, and showed premature capsid release with poor infectivity. These data argue that gL plays a key role in regulating a gH and gB functional switch from cell binding to membrane fusion.

  14. Double screening

    Energy Technology Data Exchange (ETDEWEB)

    Gratia, Pierre [Department of Physics, University of Chicago,South Ellis Avenue, Chicago, IL 60637 (United States); Hu, Wayne [Department of Astronomy and Astrophysics, University of Chicago,South Ellis Avenue, Chicago, IL 60637 (United States); Enrico Fermi Institute and Kavli Institute for Cosmological Physics, University of Chicago,South Ellis Avenue, Chicago, IL 60637 (United States); Joyce, Austin [Enrico Fermi Institute and Kavli Institute for Cosmological Physics, University of Chicago,South Ellis Avenue, Chicago, IL 60637 (United States); Ribeiro, Raquel H. [School of Physics and Astronomy, Queen Mary University of London,Mile End Road, London, E1 4NS (United Kingdom)


    Attempts to modify gravity in the infrared typically require a screening mechanism to ensure consistency with local tests of gravity. These screening mechanisms fit into three broad classes; we investigate theories which are capable of exhibiting more than one type of screening. Specifically, we focus on a simple model which exhibits both Vainshtein and kinetic screening. We point out that due to the two characteristic length scales in the problem, the type of screening that dominates depends on the mass of the sourcing object, allowing for different phenomenology at different scales. We consider embedding this double screening phenomenology in a broader cosmological scenario and show that the simplest examples that exhibit double screening are radiatively stable.

  15. Estereologia das glândulas bulbouretrais do coelho (Oryctolagus cuniculus e da cobaia (Cavia porcellus

    Directory of Open Access Journals (Sweden)

    Bélgica Vásquez


    Full Text Available As glândulas bulbouretrais (GBU no coelho (Oryctolagus cuniculus e na cobaia (Cavia porcellus desempenham um papel importante na fisiologia reprodutiva. No entanto, seus aspectos histológico e estereológico são escassos. Assim, o objetivo desta pesquisa foi comparar características estereológicas entre as GBU do coelho e da cobaia como um primeiro passo para a compreensão das variáveis morfométricas que participam nos processos reprodutivos. Foram utilizados 5 coelhos e 5 cobaias adultos machos, saudáveis, obtidos do Biotério da Universidade de La Frontera, Temuco, Chile. A região pélvica foi dissecada isolando-se a GBU de cada animal. Determinou-se o peso e o volume de cada glândula. Estas foram fixadas em formalina tamponada durante 24 horas e incluídas em paraplast. Cortes seriados de 4 μm de espessura foram corados com HE para análise estereológica. A média de células glandulares na GBU do coelho foi 19,50 x 10(5mm³ (DP 2,35 e da cobaia 10,57 x 10(5mm³ (DP 2,07 e a porcentagem média de tecido glandular foi de 25,52% (DP 2,20 e 17,20% (DP 3,33, respectivamente. Todos os parâmetros estereológicos comparados tiveram uma diferença estatisticamente significativa (p<0,0001. Estas diferenças poderiam ser explicadas porque há maior proximidade celular do epitélio secretor, menor diâmetro do lúmen dos ácinos e da relação núcleo citoplasma na GBU do coelho. Assim, os ácinos da GBU apresentam maior quantidade de células por mm³ do que na GBU do coelho. Estes parâmetros podem ser influenciados por fatores hormonais, etários, sazonais e ambientais, entre outros. Considerar as características morfológicas da GBU nesses animais poderia condicionar o êxito da reprodução por parte do macho.

  16. Transplante de glândulas salivares menores no tratamento da ceratoconjuntivite seca em cães

    Directory of Open Access Journals (Sweden)

    G.T Angélico


    Full Text Available Relatou-se o efeito do transplante de glândulas salivares menores (TGSM em cães portadores de ceratoconjuntivite seca (CCS e estudaram-se os efeitos da secreção dessas glândulas usadas como alternativa de lubrificação ocular. A aplicação da técnica foi satisfatória, uma vez que resultou em melhora no quadro clínico oftalmológico sem que houvesse mínimas intercorrências pós-operatórias.

  17. Metamaterials beyond electromagnetism (United States)

    Kadic, Muamer; Bückmann, Tiemo; Schittny, Robert; Wegener, Martin


    Metamaterials are rationally designed man-made structures composed of functional building blocks that are densely packed into an effective (crystalline) material. While metamaterials are mostly associated with negative refractive indices and invisibility cloaking in electromagnetism or optics, the deceptively simple metamaterial concept also applies to rather different areas such as thermodynamics, classical mechanics (including elastostatics, acoustics, fluid dynamics and elastodynamics), and, in principle, also to quantum mechanics. We review the basic concepts, analogies and differences to electromagnetism, and give an overview on the current state of the art regarding theory and experiment—all from the viewpoint of an experimentalist. This review includes homogeneous metamaterials as well as intentionally inhomogeneous metamaterial architectures designed by coordinate-transformation-based approaches analogous to transformation optics. Examples are laminates, transient thermal cloaks, thermal concentrators and inverters, ‘space-coiling’ metamaterials, anisotropic acoustic metamaterials, acoustic free-space and carpet cloaks, cloaks for gravitational surface waves, auxetic mechanical metamaterials, pentamode metamaterials (‘meta-liquids’), mechanical metamaterials with negative dynamic mass density, negative dynamic bulk modulus, or negative phase velocity, seismic metamaterials, cloaks for flexural waves in thin plates and three-dimensional elastostatic cloaks.

  18. Electromagnetic Environmental Effects System Testing (United States)


    K-1 L. INTRA SYSTEM ELECTROMAGNETIC COMPATIBILITY ( EMC ) SOURCE/VICTIM ................... L-1 M. PERSONNEL...TEMPEST and test guidance for the addition of test procedures for implementing Electromagnetic Compatibility ( EMC ), Radiated Emissions (RE...for Grounds and Bonds is not addressed since it is sufficiently discussed in MIL-STD-464C. For Shielding Effectiveness, reference American Society

  19. Exploration of the Electromagnetic Environment (United States)

    Fullekrug, M.


    The electromagnetic environment is composed of electric and magnetic fields which result from man-made and natural sources. An elementary experiment is described to explore the electromagnetic environment by measuring electric fields in the frequency range from approximately equal to 10 to 24 000 Hz. The equipment required to conduct the…

  20. Electromagnetic actuation in MEMS switches

    DEFF Research Database (Denmark)

    Oliveira Hansen, Roana Melina de; Mátéfi-Tempfli, Mária; Chemnitz, Steffen

    . Electromagnetic actuation is a very promising approach to operate such MEMS and Power MEMS devices, due to the long range, reproducible and strong forces generated by this method, among other advantages. However, the use of electromagnetic actuation in such devices requires the use of thick magnetic films, which...

  1. Electromagnetic compatibility in power electronics

    CERN Document Server

    Costa , François; Revol , Bertrand


    Scientists largely attribute the recent deterioration of the electromagnetic environment to power electronics. This realization has spurred the study of methodical approaches to electromagnetic compatibility designs as explored in this text. The book addresses major challenges, such as handling numerous parameters vital to predicting electro magnetic effects and achieving compliance with line-harmonics norms, while proposing potential solutions.

  2. Electromagnetic Interference (EMI) and TEMPEST Test Facility (United States)

    Federal Laboratory Consortium — Electromagnetic Interference (EMI), Electromagnetic Compatibility (EMC) and TEMPEST testing are conducted at EPG's Blacktail Canyon Test Facility in one of its two...

  3. Hybrid synchronous motor electromagnetic torque research

    Directory of Open Access Journals (Sweden)

    Suvorkova Elena E.


    Full Text Available Electromagnetic field distribution models in reluctance and permanent magnet parts were made by means of Elcut. Dependences of electromagnetic torque on torque angle were obtained.

  4. Radiofrequency Electromagnetic Field Map of Timisoara

    National Research Council Canada - National Science Library

    N. Stefu; I. Solyom; A. Arama


    There are many electromagnetic field (EMF) sources nowadays acting simultaneously, especially in urban areas, making the theoretical estimation of electromagnetic power at ground level very difficult...

  5. Gravitational scattering of electromagnetic radiation (United States)

    Brooker, J. T.; Janis, A. I.


    The scattering of electromagnetic radiation by linearized gravitational fields is studied to second order in a perturbation expansion. The incoming electromagnetic radiation can be of arbitrary multipole structure, and the gravitational fields are also taken to be advanced fields of arbitrary multipole structure. All electromagnetic multipole radiation is found to be scattered by gravitational monopole and time-varying dipole fields. No case has been found, however, in which any electromagnetic multipole radiation is scattered by gravitational fields of quadrupole or higher-order multipole structure. This lack of scattering is established for infinite classes of special cases, and is conjectured to hold in general. The results of the scattering analysis are applied to the case of electromagnetic radiation scattered by a moving mass. It is shown how the mass and velocity may be determined by a knowledge of the incident and scattered radiation.

  6. Simulator Posisi Matahari dan Bulan Berbasis Web dengan WebGL

    Directory of Open Access Journals (Sweden)



    Full Text Available Moon as a satellite of the earth has an important role for the life of the earth. Apart from being a source of illumination, moon also has an effect on the earth both on land and at sea. The influence of the moon to the earth relate to the its position. This research aims to create a simulator of the sun and moon position to the earth based on the time and location of the observation. This simulator is web-based and made in 3-dimensional (3D using webGL technology. The position of the sun and moon expressed by latitude and longitude which is a position that is passed by the line connecting the earth to the sun or the line connecting the earth to the moon. The position of the sun and moon obtained from calculations based on previous research. Once the position is known, the earth, the sun, and the moon then described as a 3-D model. The position of the camera can be moved by dragging a web page so that the sun, earth, and moon can be seen from various positions. The camera always leads to the center of the earth to avoid user errors flipping the camera which causes the object is not visible.

  7. Condroma de la glándula parótida

    Directory of Open Access Journals (Sweden)

    Yorgel Reyes Álvarez


    Full Text Available El condroma es una neoplasia benigna, de origen mesenquimatoso, constituida por tejido cartilaginoso, que en el área maxilofacial es rara. Su sitio más frecuente en el complejo craneofacial es la estructura ósea maxilar o mandibular, aunque también se han descrito condromas de los tejidos blandos. Clínicamente se presenta como una lesión de crecimiento lento, asintomático, no dolorosa, de consistencia duro elástica, con una gradual expansión. El tratamiento de elección es la resección quirúrgica. Se tuvo como objetivo publicar esta infrecuente ubicación de la neoplasia por la dificultad que se presenta al diagnóstico diferencial. Presentamos un caso clínico de un tumor localizado en el lóbulo profundo de la glándula parótida, cuyo diagnóstico inicial, tras la citología por aspiración con aguja fina, fue de adenoma pleomorfo, lo que se comprobó luego por examen histopatológico de la pieza quirúrgica que se trataba de un condroma. Se concluye que ante una tumoración de parótida, siempre debe tenerse en cuenta el condroma en el diagnóstico diferencial.

  8. Cycloplegic effects of 0.5g/L tropicamide in various low myopia age groups

    Directory of Open Access Journals (Sweden)

    Hai-Rong Zhang


    Full Text Available AIM: To investigated the refraction and cycloplegic effects of 0.5g/L tropicamide eye drops in various low myopia age groups, and provide clinical guidelines for proper usage of cyclopegic agent in different population. METHODS: Three low myopia age groups(n=45were selected, non-cycloplegic and cycloplegic auto-refraction using “Shin-Nippon” auto-refractor were performed at various time point for refractive error. The subjective accommodation amplitudes were also collected at each time point.RESULTS: The accommodation amplitude showed a similar but significant decline between 20~60min after the first cyclopegic drops in all three age groups. However, the decline of accommodation amplitudes were not statistically correlated with the results of “Shin-Nippon”auto-refraction results at different time points. CONCLUSION: The refraction time should be arranged according to the cycloplegic effects of tropicamide. Open-field auto-refractor could reduce the usage of cycloglegice drugs in low myopia groups, even for the youngest.

  9. Baryon electromagnetic form factors at BESIII

    Directory of Open Access Journals (Sweden)

    Dbeyssi Alaa


    Full Text Available Electromagnetic form factors are fundamental quantities which parameterize the electric and magnetic structure of hadrons. This contribution reports on the measurements of baryon electromagnetic form factors at the BESIII experiment in Beijing. The Beijing e+e− collider BEPCII is a double-ring symmetric collider running at √s between 2.0 and 4.6 GeV. Baryon electromagnetic form factors can be measured at BESIII in direct e+e−-annihilation and in initial state radiation processes. Based on the data collected by the BESIII detector at 12 center of mass energies between 2.23 and 3.67 GeV, the e+e− → p̄p cross section and the time-like proton form factor is measured. Preliminary results from the analysis of the initial state radiation process e+e− → p̄pγ using a data set of 7.408 fb−1 collected at center-of-mass energies between 3.773 and 4.6 GeV, are also presented. The cross section for e+e−→Λ¯Λ${e^ + }{e^ - } \\to \\bar \\Lambda \\Lambda $ is measured based on 40.5 pb−1 data collected at 4 energy points from the threshold up to 3.08 GeV. Preliminary results on the total cross section and the Λ effective form factor are shown. Ongoing analysis based on the high luminosity energy scan from 2015 and from radiative return at different √s are also described.

  10. Highly abundant HCN in the inner hot envelope of GL 2591 : probing the birth of a hot core?

    NARCIS (Netherlands)

    Boonman, A. M. S.; Stark, R.; Tak, F. F. S. van der; Dishoeck, E. F.; Schafer, F.; Lange, G de; Laauwen, W. M.; van der Wal, P.B.


    Published in: Astrophys. J. 553 (2001) L63-L68 citations recorded in [Science Citation Index] Abstract: We present observations of the v2=0 and vibrationally excited v2=1 J=9-8 rotational lines of HCN at 797 GHz toward the deeply embedded massive young stellar object GL 2591, which provide the

  11. Electromagnetic fields and life

    CERN Document Server

    Presman, A S


    A broad region of the electromagnetic spectrum long assumed to have no influence on living systems under natural conditions has been critically re-examined over the past decade. This spectral region extends from the superhigh radio frequencies, through de­ creasing frequencies, to and including essentially static electric and magnetic fields. The author of this monograph, A. S. Presman, has reviewed not only the extensive Russian literatur!;"l, but also al­l most equally comprehensively the non-Russian literature, dealing with biological influences of these fields. Treated also is literature shedding some light on possible theoretical foundations for these phenomena. A substantial, rapidly increasing number of studies in many laboratories and countries has now clearly established bio­ logical influences which are independent of the theoretically predictable, simple thermal effects. Indeed many of the effects are produced by field strengths very close to those within the natural environment. The author has,...

  12. Electromagnetically Clean Solar Arrays (United States)

    Stem, Theodore G.; Kenniston, Anthony E.


    The term 'electromagnetically clean solar array' ('EMCSA') refers to a panel that contains a planar array of solar photovoltaic cells and that, in comparison with a functionally equivalent solar-array panel of a type heretofore used on spacecraft, (1) exhibits less electromagnetic interferences to and from other nearby electrical and electronic equipment and (2) can be manufactured at lower cost. The reduction of electromagnetic interferences is effected through a combination of (1) electrically conductive, electrically grounded shielding and (2) reduction of areas of current loops (in order to reduce magnetic moments). The reduction of cost is effected by designing the array to be fabricated as a more nearly unitary structure, using fewer components and fewer process steps. Although EMCSAs were conceived primarily for use on spacecraft they are also potentially advantageous for terrestrial applications in which there are requirements to limit electromagnetic interference. In a conventional solar panel of the type meant to be supplanted by an EMCSA panel, the wiring is normally located on the back side, separated from the cells, thereby giving rise to current loops having significant areas and, consequently, significant magnetic moments. Current-loop geometries are chosen in an effort to balance opposing magnetic moments to limit far-0field magnetic interactions, but the relatively large distances separating current loops makes full cancellation of magnetic fields problematic. The panel is assembled from bare photovoltaic cells by means of multiple sensitive process steps that contribute significantly to cost, especially if electomagnetic cleanliness is desired. The steps include applying a cover glass and electrical-interconnect-cell (CIC) sub-assemble, connecting the CIC subassemblies into strings of series-connected cells, laying down and adhesively bonding the strings onto a panel structure that has been made in a separate multi-step process, and mounting the

  13. Electromagnetic scattering theory (United States)

    Bird, J. F.; Farrell, R. A.


    Electromagnetic scattering theory is discussed with emphasis on the general stochastic variational principle (SVP) and its applications. The stochastic version of the Schwinger-type variational principle is presented, and explicit expressions for its integrals are considered. Results are summarized for scalar wave scattering from a classic rough-surface model and for vector wave scattering from a random dielectric-body model. Also considered are the selection of trial functions and the variational improvement of the Kirchhoff short-wave approximation appropriate to large size-parameters. Other applications of vector field theory discussed include a general vision theory and the analysis of hydromagnetism induced by ocean motion across the geomagnetic field. Levitational force-torque in the magnetic suspension of the disturbance compensation system (DISCOS), now deployed in NOVA satellites, is also analyzed using the developed theory.

  14. Focusing of electromagnetic waves

    Energy Technology Data Exchange (ETDEWEB)

    Dhayalan, V.


    The focusing of electromagnetic waves inside a slab has been examined together with two special cases in which the slab is reduced to a single interface or a single medium. To that end the exact solutions for the fields inside a layered medium have been used, given in terms of the outside current source in order to obtain the solutions for the focused electric field inside a slab. Both exact and asymptotic solutions of the problem have been considered, and the validity of the latter has been discussed. The author has developed a numerical algorithm for evaluation of the diffraction integral with special emphasis on reducing the computing time. The numerical techniques in the paper can be readily applied to evaluate similar diffraction integrals occurring e.g. in microstrip antennas. 46 refs.

  15. Solved problems in electromagnetics

    CERN Document Server

    Salazar Bloise, Félix; Bayón Rojo, Ana; Gascón Latasa, Francisco


    This book presents the fundamental concepts of electromagnetism through problems with a brief theoretical introduction at the beginning of each chapter. The present book has a strong  didactic character. It explains all the mathematical steps and the theoretical concepts connected with the development of the problem. It guides the reader to understand the employed procedures to learn to solve the exercises independently. The exercises are structured in a similar way: The chapters begin with easy problems increasing progressively in the level of difficulty. This book is written for students of physics and engineering in the framework of the new European Plans of Study for Bachelor and Master and also for tutors and lecturers. .

  16. On steady electromagnetic equilibria (United States)

    Lehnert, B.


    The existence of steady electromagnetic equilibrium states predicted by an extended Lorentz invariant formulation of Maxwell's equations is analyzed. General equilibrium solutions are outlined which lead to integrated field quantities of the system, such as total charge qo, magnetic moment Mo, mass mo and angular momentum so. The quantization of moMo/qo in terms of Bohr magnetons is shown to be equivalent to the proposed resonance condition of circulating self-confined radiation. Exact equilibrium solutions were deduced in two simple cases, thereby leading to a so of the same order as that of the electron, and to a qo one order of magnitude larger than the electronic charge. A variational procedure is suggested in search for states of minimum charge, under the subsidiary quantum conditions on moMo/qo and so, i.e., by varying the profile of the electric space charge distribution.

  17. Electromagnetic properties of neutrinos

    Energy Technology Data Exchange (ETDEWEB)

    Ould-Saada, F. [Zurich Univ. (Switzerland). Inst. fuer Physik


    Electromagnetic properties of neutrinos and their implications are discussed, and the experimental situation summarised. Spin precession in solar magnetic fields presents a solution of the solar neutrino problem. A magnetic moment, {mu}{sub {nu}}, of the order of 10{sup -11} {mu}{sub B} would be needed. In the simplest extension of the standard model, with no-vanishing neutrino masses, dipole moment interactions are allowed through higher order processes. A neutrino mass of {approx_equal}10 eV would give {mu}{sub {nu}}{approx_equal}10{sup -18} {mu}{sub B}, much smaller than the present experimental upper limit of 2x10{sup -10} {mu}{sub B}. Although model-dependent, upper bounds on dipole moments from astrophysics and cosmology are 10 to 100 times more stringent. Any values of {mu}{sub {nu}}, larger than the SM predictions, would then signal the onset of new physics. Among the processes sensitive to the magnetic moment, {nu}e{sup -} scattering presents two advantages: it is a pure weak, theoretically well understood process, and the recoil electron can be easily measured. A hypothetical electromagnetic contribution to the cross-section would dominate at low energies. A low background detector, MUNU, being built at the Bugey nuclear reactor is presented.It is based on a gas TPC, surrounded by a scintillator. The threshold on the electron recoil energy can be set very low, around 500 keV, giving the experiment a good sensitivity to the magnetic moment of the {nu}{sub e}, extending down to 2x10{sup -11} {mu}{sub B}. (author) 15 figs., 5 tabs., 96 refs.

  18. Classificação Morfológica da Glândula Prepucial do Nasua nasua (Quati.

    Directory of Open Access Journals (Sweden)

    Bruno Machado Bertassoli


    Full Text Available A proposta desta pesquisa é descrever a glândula prepucial do Nasua nasua. Utilizaram-se oito quatis provenientes do Criatόrio Científico Cecrimpas (Unifeob; as glândulas prepuciais foram analisadas, dissecadas e descritas macro e microscopicamente, visando estabelecer sua classificação morfofuncional para, assim, poder compará-las com as de outras espécies já descritas na literatura. Amostras de tecido glandular foram coletadas, coradas (Hematoxilina e Eosina, Azul Toluidina, e Picrosirius e analisadas através da microscopia de luz. Todos os resultados foram compilados e fotodocumentados. Na espécie citada, essa glândula tem como principal função a demarcação territorial e está situada na porção prepucial do mesmo modo que nos javalis. Em outros animais, como primatas, cervídeos e roedores, essas glândulas demarcatόrias estão localizadas em diferentes regiões anatômicas, como entre os olhos, no metatarso, nas áreas perianais e esternais. Em nosso resultado das medidas biométricas, obtivemos como média 3,8 ± 1,41cm de largura, 3,15 ± 0,93cm de altura e 10,26 ± 1,89cm de circunferência, e essa glândula foi histologicamente classificada como do tipo tubuloalveolar, com secreção holόcrina.

  19. Transfusiones de glóbulos rojos en pacientes críticos

    Directory of Open Access Journals (Sweden)

    Carolina Ruiz Balart


    Full Text Available La anemia es muy frecuente en los pacientes críticos,  pudiendo estar presente en casi el 100% después una semana de hospitalización enla Unidadde Cuidados Intensivos (UCI. Se ha descrito que la anemia es un factor de riesgo de mayor mortalidad y morbilidad para los pacientes críticos. La etiología de la anemia en UCI es multifactorial, destacando la anemia de la inflamación, los déficits nutricionales, la hemodilución y el aumento de las pérdidas. Dentro del aumento de las pérdidas destaca la toma seriada de exámenes de sangre. A pesar de lo deletéreo de la anemia, no se ha demostrado que las transfusiones de glóbulos rojos (GR puedan mejorar el pronóstico de los pacientes con anemia. Por el contrario, hay estudios que han descrito un aumento de las complicaciones y mortalidad asociadas al aporte de GR. La evidencia actual sugiere que en pacientes críticos estables y que no presentan sangrado activo, las transfusiones deberían evitarse si la concentración de hemoglobina es mayor a 7 g/dL. Sin embargo, un umbral transfusional estricto puede no ser adecuado para todos los pacientes, por lo que también deberían considerarse las alteraciones de la perfusión y la condición cardíaca y respiratoria en la decisión de transfundir GR.

  20. The Endoplasmic Reticulum-Associated Maize GL8 Protein Is a Component of the Acyl-Coenzyme A Elongase Involved in the Production of Cuticular Waxes1 (United States)

    Xu, Xiaojie; Dietrich, Charles R.; Lessire, Rene; Nikolau, Basil J.; Schnable, Patrick S.


    The gl8 gene is required for the normal accumulation of cuticular waxes on maize (Zea mays) seedling leaves. The predicted GL8 protein exhibits significant sequence similarity to a class of enzymes that catalyze the reduction of a ketone group to a hydroxyl group. Polyclonal antibodies raised against the recombinant Escherichia coli-expressed GL8 protein were used to investigate the function of this protein in planta. Subcellular fractionation experiments indicate that the GL8 protein is associated with the endoplasmic reticulum membranes. Furthermore, polyclonal antibodies raised against the partially purified leek (Allium porrum) microsomal acyl-coenzyme A (CoA) elongase can react with the E. coli-expressed GL8 protein. In addition, anti-GL8 immunoglobulin G inhibited the in vitro elongation of stearoyl-CoA by leek and maize microsomal acyl-CoA elongase. In combination, these findings indicate that the GL8 protein is a component of the acyl-CoA elongase. In addition, the finding that anti-GL8 immunoglobulin G did not significantly inhibit the 3-ketoacyl-CoA synthase, 3-ketoacyl-CoA dehydrase, and (E) 2,3-enoyl-CoA reductase partial reactions of leek or maize acyl-CoA elongase lends further support to our previous hypothesis that the GL8 protein functions as a β-ketoacyl reductase during the elongation of very long-chain fatty acids required for the production of cuticular waxes. PMID:11891248

  1. Regionalización histológica de la glándula dorsal del pecarí de collar (Artiodactyla, Tayassuidae: Pecari tajacu)


    Juan Carlos González Morales; Víctor Fajardo; Arturo Luna Blasio; Palestina Guevara-Fiore; Jorge Rodríguez-Antolín; Erendira Quintana


    Se describe histológicamente la glándula dorsal de machos y hembras del pecarí de collar en tres regiones: craneal, media y caudal. Con las tinciones Hematocilinaeosina y Tricrómica de Masson observamos una clara regionalización morfológica e histológica de esta glándula y se describe por primera vez la presencia de glándulas tubuloacinares en la región craneal de la glándula dorsal del macho de pecarí, cuya función es aún desconocida.

  2. Regionalización histológica de la glándula dorsal del pecarí de collar (Artiodactyla, Tayassuidae: Pecari tajacu

    Directory of Open Access Journals (Sweden)

    Juan Carlos González Morales


    Full Text Available Se describe histológicamente la glándula dorsal de machos y hembras del pecarí de collar en tres regiones: craneal, media y caudal. Con las tinciones Hematocilinaeosina y Tricrómica de Masson observamos una clara regionalización morfológica e histológica de esta glándula y se describe por primera vez la presencia de glándulas tubuloacinares en la región craneal de la glándula dorsal del macho de pecarí, cuya función es aún desconocida.

  3. Electromagnetic environment and telecommunications: towards a cognitive electromagnetic compatibility (United States)

    Zeddam, Ahmed; Avril, Gautier; Tlich, Mohamed


    This article deals with the electromagnetic environment management problem within the context of high speed digital transmissions deployed in wired telecommunication networks. Traditionally, Electromagnetic Compatibility (EMC) is assured by filtering for better electromagnetic immunity, and by cable shielding for emission limitation. However, like cognitive radio, we can also, for high speed wired transmissions, treat the EMC as an intelligent and autonomous system capable of perceiving its environment, interpreting it, making suited decisions, and reacting according to the constraints related to the electromagnetic environment. In this context, some application examples are here given in order to illustrate this evolution towards a cognitive EMC in wired networks. To cite this article: A. Zeddam et al., C. R. Physique 10 (2009).

  4. Electromagnetic segregation of cast parts (United States)

    Langejurgen, M.; Nacke, B.


    The Electromagnetic Induced Segregation (EIS) of cast parts is an innovative technology for diecasting aluminium alloys. Using numerical simulation, an inductor system has been developed to produce a primary silicon concentration gradient during casting. The report shows the advantages of numerical simulation in research and development. A suitable inductor has been designed and its electromagnetic field optimized for the EIS. The numerical model is 2D for geometries with cylindrical symmetry and 3D for non-symmetric products. The inductor system is implemented in a pilot installation. With the metallurgical results, the interaction between the electromagnetic field and the location of primary silicon is investigated. Figs 7, Refs 1.

  5. Differential forms on electromagnetic networks

    CERN Document Server

    Balasubramanian, N V; Sen Gupta, D P


    Differential Forms on Electromagnetic Networks deals with the use of combinatorial techniques in electrical circuit, machine analysis, and the relationship between circuit quantities and electromagnetic fields. The monograph is also an introduction to the organization of field equations by the methods of differential forms. The book covers topics such as algebraic structural relations in an electric circuit; mesh and node-pair analysis; exterior differential structures; generalized Stoke's theorem and tensor analysis; and Maxwell's electromagnetic equation. Also covered in the book are the app

  6. Electromagnetic transients in power cables

    CERN Document Server

    da Silva, Filipe Faria


    From the more basic concepts to the most advanced ones where long and laborious simulation models are required, Electromagnetic Transients in Power Cables provides a thorough insight into the study of electromagnetic transients and underground power cables. Explanations and demonstrations of different electromagnetic transient phenomena are provided, from simple lumped-parameter circuits to complex cable-based high voltage networks, as well as instructions on how to model the cables.Supported throughout by illustrations, circuit diagrams and simulation results, each chapter contains exercises,

  7. Electromagnetic foundations of electrical engineering

    CERN Document Server

    Faria, J A Brandao


    The applications of electromagnetic phenomena within electrical engineering have been evolving and progressing at a fast pace. In contrast, the underlying principles have been stable for a long time and are not expected to undergo any changes. It is these electromagnetic field fundamentals that are the subject of discussion in this book with an emphasis on basic principles, concepts and governing laws that apply across the electrical engineering discipline. Electromagnetic Foundations of Electrical Engineering begins with an explanation of Maxwell's equations, from which the fundament

  8. A primer on electromagnetic fields

    CERN Document Server

    Frezza, Fabrizio


    This book is a concise introduction to electromagnetics and electromagnetic fields that covers the aspects of most significance for engineering applications by means of a rigorous, analytical treatment. After an introduction to equations and basic theorems, topics of fundamental theoretical and applicative importance, including plane waves, transmission lines, waveguides, and Green's functions, are discussed in a deliberately general way. Care has been taken to ensure that the text is readily accessible and self-consistent, with conservation of the intermediate steps in the analytical derivations. The book offers the reader a clear, succinct course in basic electromagnetic theory. It will also be a useful lookup tool for students and designers.

  9. Electrical power generation by mechanically modulating electrical double layers. (United States)

    Moon, Jong Kyun; Jeong, Jaeki; Lee, Dongyun; Pak, Hyuk Kyu


    Since Michael Faraday and Joseph Henry made their great discovery of electromagnetic induction, there have been continuous developments in electrical power generation. Most people today get electricity from thermal, hydroelectric, or nuclear power generation systems, which use this electromagnetic induction phenomenon. Here we propose a new method for electrical power generation, without using electromagnetic induction, by mechanically modulating the electrical double layers at the interfacial areas of a water bridge between two conducting plates. We find that when the height of the water bridge is mechanically modulated, the electrical double layer capacitors formed on the two interfacial areas are continuously charged and discharged at different phases from each other, thus generating an AC electric current across the plates. We use a resistor-capacitor circuit model to explain the results of this experiment. This observation could be useful for constructing a micro-fluidic power generation system in the near future.

  10. [Electromagnetic pollution (electrosmog)--potential hazards of our electromagnetic future]. (United States)

    Nowak, D; Radon, K


    The term electromagnetic environment encompasses the totality of all electric, magnetic and electromagnetic fields generated by natural and technical sources. A differentiation is made between low- and high-frequency electromagnetic fields. Typical sources of the former are domestic electricity Exposure to the latter is, for example, associated with the sue of mobile telephones. Studies on the health-related effects of electromagnetic fields are available in particular for the low-frequency range, based on an appropriate estimation of exposure. A number of these studies reveal an association between exposure to this type of electromagnetic fields and the occurrence of infantile leukemia in the highest exposure category. For high-frequency electromagnetic fields the number of epidemiological studies is limited. An increased risk of an accident occurring through the use of a cellular phone while driving has consistently been shown. Against the background of our limited knowledge about possible adverse effects of exposure to mobile phone transmitters, and the inability of the public to influence such exposure, transparency in the communication of the risks involved is of great importance.

  11. Gallilei covariant quantum mechanics in electromagnetic fields

    Directory of Open Access Journals (Sweden)

    H. E. Wilhelm


    Full Text Available A formulation of the quantum mechanics of charged particles in time-dependent electromagnetic fields is presented, in which both the Schroedinger equation and wave equations for the electromagnetic potentials are Galilei covariant, it is shown that the Galilean relativity principle leads to the introduction of the electromagnetic substratum in which the matter and electromagnetic waves propagate. The electromagnetic substratum effects are quantitatively significant for quantum mechanics in reference frames, in which the substratum velocity w is in magnitude comparable with the velocity of light c. The electromagnetic substratum velocity w occurs explicitly in the wave equations for the electromagnetic potentials but not in the Schroedinger equation.

  12. Conical electromagnetic radiation flux concentrator (United States)

    Miller, E. R.


    Concentrator provides method of concentrating a beam of electromagnetic radiation into a smaller beam, presenting a higher flux density. Smaller beam may be made larger by sending radiation through the device in the reverse direction.

  13. Earthquake prediction with electromagnetic phenomena

    Energy Technology Data Exchange (ETDEWEB)

    Hayakawa, Masashi, E-mail: [Hayakawa Institute of Seismo Electomagnetics, Co. Ltd., University of Electro-Communications (UEC) Incubation Center, 1-5-1 Chofugaoka, Chofu Tokyo, 182-8585 (Japan); Advanced Wireless & Communications Research Center, UEC, Chofu Tokyo (Japan); Earthquake Analysis Laboratory, Information Systems Inc., 4-8-15, Minami-aoyama, Minato-ku, Tokyo, 107-0062 (Japan); Fuji Security Systems. Co. Ltd., Iwato-cho 1, Shinjyuku-ku, Tokyo (Japan)


    Short-term earthquake (EQ) prediction is defined as prospective prediction with the time scale of about one week, which is considered to be one of the most important and urgent topics for the human beings. If this short-term prediction is realized, casualty will be drastically reduced. Unlike the conventional seismic measurement, we proposed the use of electromagnetic phenomena as precursors to EQs in the prediction, and an extensive amount of progress has been achieved in the field of seismo-electromagnetics during the last two decades. This paper deals with the review on this short-term EQ prediction, including the impossibility myth of EQs prediction by seismometers, the reason why we are interested in electromagnetics, the history of seismo-electromagnetics, the ionospheric perturbation as the most promising candidate of EQ prediction, then the future of EQ predictology from two standpoints of a practical science and a pure science, and finally a brief summary.

  14. Monte Carlo methods for electromagnetics

    CERN Document Server

    Sadiku, Matthew NO


    Until now, novices had to painstakingly dig through the literature to discover how to use Monte Carlo techniques for solving electromagnetic problems. Written by one of the foremost researchers in the field, Monte Carlo Methods for Electromagnetics provides a solid understanding of these methods and their applications in electromagnetic computation. Including much of his own work, the author brings together essential information from several different publications.Using a simple, clear writing style, the author begins with a historical background and review of electromagnetic theory. After addressing probability and statistics, he introduces the finite difference method as well as the fixed and floating random walk Monte Carlo methods. The text then applies the Exodus method to Laplace's and Poisson's equations and presents Monte Carlo techniques for handing Neumann problems. It also deals with whole field computation using the Markov chain, applies Monte Carlo methods to time-varying diffusion problems, and ...

  15. Electromagnetic field theories for engineering

    CERN Document Server

    Salam, Md Abdus


    A four year Electrical and Electronic engineering curriculum normally contains two modules of electromagnetic field theories during the first two years. However, some curricula do not have enough slots to accommodate the two modules. This book, Electromagnetic Field Theories, is designed for Electrical and Electronic engineering undergraduate students to provide fundamental knowledge of electromagnetic fields and waves in a structured manner. A comprehensive fundamental knowledge of electric and magnetic fields is required to understand the working principles of generators, motors and transformers. This knowledge is also necessary to analyze transmission lines, substations, insulator flashover mechanism, transient phenomena, etc. Recently, academics and researches are working for sending electrical power to a remote area by designing a suitable antenna. In this case, the knowledge of electromagnetic fields is considered as important tool.

  16. Classical electromagnetism in a nutshell

    CERN Document Server

    Garg, Anupam


    This graduate-level physics textbook provides a comprehensive treatment of the basic principles and phenomena of classical electromagnetism. While many electromagnetism texts use the subject to teach mathematical methods of physics, here the emphasis is on the physical ideas themselves. Anupam Garg distinguishes between electromagnetism in vacuum and that in material media, stressing that the core physical questions are different for each. In vacuum, the focus is on the fundamental content of electromagnetic laws, symmetries, conservation laws, and the implications for phenomena such as radiation and light. In material media, the focus is on understanding the response of the media to imposed fields, the attendant constitutive relations, and the phenomena encountered in different types of media such as dielectrics, ferromagnets, and conductors. The text includes applications to many topical subjects, such as magnetic levitation, plasmas, laser beams, and synchrotrons.

  17. Wave propagation in electromagnetic media

    CERN Document Server

    Davis, Julian L


    This is the second work of a set of two volumes on the phenomena of wave propagation in nonreacting and reacting media. The first, entitled Wave Propagation in Solids and Fluids (published by Springer-Verlag in 1988), deals with wave phenomena in nonreacting media (solids and fluids). This book is concerned with wave propagation in reacting media-specifically, in electro­ magnetic materials. Since these volumes were designed to be relatively self­ contained, we have taken the liberty of adapting some of the pertinent material, especially in the theory of hyperbolic partial differential equations (concerned with electromagnetic wave propagation), variational methods, and Hamilton-Jacobi theory, to the phenomena of electromagnetic waves. The purpose of this volume is similar to that of the first, except that here we are dealing with electromagnetic waves. We attempt to present a clear and systematic account of the mathematical methods of wave phenomena in electromagnetic materials that will be readily accessi...

  18. Radiation and propagation of electromagnetic waves

    CERN Document Server

    Tyras, George; Declaris, Nicholas


    Radiation and Propagation of Electromagnetic Waves serves as a text in electrical engineering or electrophysics. The book discusses the electromagnetic theory; plane electromagnetic waves in homogenous isotropic and anisotropic media; and plane electromagnetic waves in inhomogenous stratified media. The text also describes the spectral representation of elementary electromagnetic sources; the field of a dipole in a stratified medium; and radiation in anisotropic plasma. The properties and the procedures of Green's function method of solution, axial currents, as well as cylindrical boundaries a

  19. Advanced Model of Electromagnetic Launcher

    Directory of Open Access Journals (Sweden)

    Karel Leubner


    Full Text Available An advanced 2D model of electromagnetic launcher is presented respecting the influence of eddy currents induced in the accelerated ferromagnetic body. The time evolution of electromagnetic field in the system, corresponding forces acting on the projectile and time evolutions of its velocity and current in the field circuit are solved numerically using own application Agros2d. The results are then processed and evaluated in Wolfram Mathematica. The methodology is illustrated with an example whose results are discussed.

  20. Self-dual electromagnetic fields (United States)

    Chubykalo, Andrew E.; Espinoza, Augusto; Kosyakov, B. P.


    We demonstrate the utility of self-dual fields in electrodynamics. Stable configurations of free electromagnetic fields can be represented as superpositions of standing waves, each possessing zero Poynting vector and zero orbital angular momentum. The standing waves are themselves superpositions of self-dual and anti-self-dual solutions. The idea of self-duality provides additional insights into the geometrical and spectral properties of stable electromagnetic configurations, such as those responsible for the formation of ball lightning.

  1. The law of electromagnetic force

    Directory of Open Access Journals (Sweden)

    V.J. Kutkovetskyy


    Full Text Available Calculation peculiarities for Lorentz force, Ampere force, interaction of parallel electric currents, and the moment of electrical machines are analyzed. They have exceptions on application, and they are the rules which result from the law of electromagnetic force as coordinate derivative of the operating magnetic flow. An addition to the direction of electromagnetic force action is proposed. Standards of salient-pole electrical machine designing are considered.

  2. Condroma de la glándula parótida Parotid gland chondroma

    Directory of Open Access Journals (Sweden)

    Yorgel Reyes Álvarez


    Full Text Available El condroma es una neoplasia benigna, de origen mesenquimatoso, constituida por tejido cartilaginoso, que en el área maxilofacial es rara. Su sitio más frecuente en el complejo craneofacial es la estructura ósea maxilar o mandibular, aunque también se han descrito condromas de los tejidos blandos. Clínicamente se presenta como una lesión de crecimiento lento, asintomático, no dolorosa, de consistencia duro elástica, con una gradual expansión. El tratamiento de elección es la resección quirúrgica. Se tuvo como objetivo publicar esta infrecuente ubicación de la neoplasia por la dificultad que se presenta al diagnóstico diferencial. Presentamos un caso clínico de un tumor localizado en el lóbulo profundo de la glándula parótida, cuyo diagnóstico inicial, tras la citología por aspiración con aguja fina, fue de adenoma pleomorfo, lo que se comprobó luego por examen histopatológico de la pieza quirúrgica que se trataba de un condroma. Se concluye que ante una tumoración de parótida, siempre debe tenerse en cuenta el condroma en el diagnóstico diferencial.The chondroma is a benign tumor of mesenchymal origin, consisted of a cartilaginous tissue, and occurs rarely in the maxillofacial area. Its most frequent site in the craniofacial complex is the maxillary bony structure, although chondromas of the soft tissues have also been described in the literature. From the clinical viewpoint, it appears as a painless, hard elastic lesion of slow asymptomatic growth, with gradual expansion. The treatment of choice is surgery. This paper presented a clinical case of a tumor located in the deep lobe of the parotid gland. The initial diagnosis, after the fine needle aspiration test, was pleomorphic adenoma, which was then subjected to histopathologic testing to obtain the final diagnosis of chondroma. Concluding that although uncommon in this localization, it should always be kept in mind as possible diagnosis. It was concluded that when

  3. Introduction to engineering electromagnetics

    CERN Document Server

    Lee, Yeon Ho


    This text provides students with the missing link that can help them master the basic principles of electromagnetics. The concept of vector fields is introduced by starting with clear definitions of position, distance, and base vectors. The symmetries of typical configurations are discussed in detail, including cylindrical, spherical, translational, and two-fold rotational symmetries. To avoid serious confusion between symbols with two indices, the text adopts a new notation: a letter with subscript 1-2 for the work done in moving a unit charge from point 2 to point 1, in which the subscript 1-2 mimics the difference in potentials, while the hyphen implies a sense of backward direction, from 2 to 1. This text includes 300 figures in which real data are drawn to scale. Many figures provide a three-dimensional view. Each subsection includes a number of examples that are solved by examining rigorous approaches in steps. Each subsection ends with straightforward exercises and answers through which students can c...


    CERN Multimedia

    R. Rusack

    Installation is under way of the last piece of the electromagnetic calorimeter. This is the preshower (ES) that sits in front of the two endcap calorimeters. The construction of the ES was completed in December and went through a detailed set of tests in December and January. The two preshower detectors have a total of 4300 silicon sensors with 137,000 strips. After final assembly and system testing in January, only two of the strips were found to be defective. Once CMS was fully opened a new support structure (‘Gazprom’) was put into place underneath the beam pipe, to support the Surkov platform, on which the preshower installation takes place. In the early hours of 26th February the first two Dees, which form the ‘ES+’ endcap,  were transported to P5 , a journey that took two and a half hours. The Dees, still inside environmental protection boxes, were then lowered  underground and moved to the ‘+’ end of CMS. Installation start...

  5. Electromagnetism of Bacterial Growth (United States)

    Ainiwaer, Ailiyasi


    There has been increasing concern from the public about personal health due to the significant rise in the daily use of electrical devices such as cell phones, radios, computers, GPS, video games and television. All of these devices create electromagnetic (EM) fields, which are simply magnetic and electric fields surrounding the appliances that simultaneously affect the human bio-system. Although these can affect the human system, obstacles can easily shield or weaken the electrical fields; however, magnetic fields cannot be weakened and can pass through walls, human bodies and most other objects. The present study was conducted to examine the possible effects of bacteria when exposed to magnetic fields. The results indicate that a strong causal relationship is not clear, since different magnetic fields affect the bacteria differently, with some causing an increase in bacterial cells, and others causing a decrease in the same cells. This phenomenon has yet to be explained, but the current study attempts to offer a mathematical explanation for this occurrence. The researchers added cultures to the magnetic fields to examine any effects to ion transportation. Researchers discovered ions such as potassium and sodium are affected by the magnetic field. A formula is presented in the analysis section to explain this effect.


    Energy Technology Data Exchange (ETDEWEB)

    Steven D. Novack; Dale K. Kotter; Dennis Slafer; Patrick Pinhero


    This research explores a new efficient approach for producing electricity from the abundant energy of the sun. A nanoantenna electromagnetic collector (NEC) has been designed, prototyped, and tested. Proof of concept has been validated. The device targets mid-infrared wavelengths where conventional photovoltaic (PV) solar cells do not respond but is abundant in solar energy. The initial concept of designing NEC antennas was based on scaling of radio frequency antenna theory. This approach has proven unsuccessful by many due to not fully understanding and accounting for the optical behavior of materials in the THz region. Also until recent years the nanofabrication methods were not available to fabricate the optical antenna elements. We have addressed and overcome both technology barriers. Several factors were critical in successful implementation of NEC including: 1) frequency-dependent modeling of antenna elements, 2) selection of materials with proper THz properties and 3) novel manufacturing methods that enable economical large-scale manufacturing. The work represents an important step toward the ultimate realization of a low-cost device that will collect as well as convert this radiation into electricity, which will lead to a wide spectrum, high conversion efficiency, and low cost solution to complement conventional PVs.

  7. Carcinoma da glândula supra-renal Adrenal gland carcinoma

    Directory of Open Access Journals (Sweden)

    Alexandre Coutinho Teixeira de Freitas


    Full Text Available RACIONAL: A neoplasia da glândula supra-renal pode ser oriunda de diversos tipos histológicos. O carcinoma é raro, correspondendo à 0,02% de todas as neoplasias. OBJETIVOS: Revisar os últimos avanços relacionados ao diagnóstico e ao tratamento do carcinoma da glândula supra-renal. MÉTODOS:Foi realizada revisão da literatura no Medline, livros texto de autores consagrados e referências obtidas de artigos considerados de maior relevância. CONCLUSÕES: Aproximadamente 79% dos carcinomas supra-renais são funcionantes. O hormônio mais comumente secretado é o cortisol causando síndrome de Cushing. Portadores de lesões não-funcionantes podem apresentar queixas relacionadas com o crescimento local da lesão. Ele está presente em uma série de síndromes neoplásicas de origem familiar. Ainda não está definido se o carcinoma esporádico tem origem em lesões benignas. De acordo com os sintomas, a investigação diagnóstica inicial envolve dosagens de cortisol urinário e nível sérico de aldosterona e renina. A tomografia abdominal ou a ressonância magnética são os exames de imagem de primeira linha. O PET scan com fluorodeoxiglicose apresenta potencial para diferenciação entre lesão benigna e maligna. A biópsia com agulha fina não está indicada devido à sua alta taxa de complicações. O tratamento de eleição é o cirúrgico com ressecção em bloco de órgãos adjacentes se necessário. Linfadenectomia aórtica e retroperitoneal deve ser realizada. Recorrência local ou metástases ocorrem em 80% dos casos. Procedimentos cirúrgicos citoredutores beneficiam os casos de doença avançada. Na presença de metástases, nos submetidos à cirurgia citoredutora e nos com recorrência local à quimioterapia com mitotano está indicada. Radioterapia é o tratamento de escolha no caso de metástases ósseas e tratamento adjuvante em alguns casos de risco elevado para recorrência. Em adultos a sobrevida média geral em 5 anos

  8. Control Method for Electromagnetic Unmanned Robot Applied to Automotive Test Based on Improved Smith Predictor Compensator

    Directory of Open Access Journals (Sweden)

    Gang Chen


    Full Text Available A new control method for an electromagnetic unmanned robot applied to automotive testing (URAT and based on improved Smith predictor compensator, and considering a time delay, is proposed. The mechanical system structure and the control system structure are presented. The electromagnetic URAT adopts pulse width modulation (PWM control, while the displacement and the current doubles as a closed-loop control strategy. The coordinated control method of multiple manipulators for the electromagnetic URAT, e.g., a skilled human driver with intelligent decision-making ability is provided, and the improved Smith predictor compensator controller for the electromagnetic URAT considering a time delay is designed. Experiments are conducted using a Ford FOCUS automobile. Comparisons between the PID control method and the proposed method are conducted. Experimental results show that the proposed method can achieve the accurate tracking of the target vehicle's speed and reduce the mileage derivation of autonomous driving, which meets the requirements of national test standards.

  9. Acoustic emission analysis of crack resistance and fracture behavior of 20GL steel having the gradient microstructure and strength (United States)

    Nikulin, S.; Nikitin, A.; Belov, V.; Rozhnov, A.; Turilina, V.; Anikeenko, V.; Khatkevich, V.


    The crack resistances as well as fracture behavior of 20GL steel quenched with a fast-moving water stream and having gradient microstructure and strength are analyzed. Crack resistance tests with quenched and normalized flat rectangular specimens having different cut lengths loaded by three-point bending with acoustic emission measurements have been performed. The critical J-integral has been used as the crack resistance parameter of the material. Quenching with a fast moving water stream leads to gradient (along a specimen wall thickness) strengthening of steel due to highly refined gradient microstructure formation of the troostomartensite type. Quenching with a fast-moving water stream increases crack resistance Jc , of 20GL steel by a factor of ∼ 1.5. The fracture accrues gradually with the load in the normalized specimens while the initiated crack is hindered in the variable ductility layer and further arrested in the more ductile core in the quenched specimens.

  10. Design and implementation of virtual fault diagnosis system for photoelectric tracking devices based on OpenGL (United States)

    Hou, MingLiang; Li, Cunhua; Zhang, Yong; Su, Liyun


    In view of the crucial deficiency of the traditional diagnosis approaches for photoelectric tracking devices and the output of more sufficient diagnosis information, in this paper, an virtual fault diagnosis system based on open graphic library(OpenGL) is proposed. Firstly, some interrelated key principles and technology of virtual reality, visualization and intelligent fault diagnosis technology are put forward. Then, the demand analysis and architecture of the system are elaborated. Next, details of interrelated essential implementation issues are also discussed, including the the 3D modeling of the related diagnosis equipments, key development process and design via OpenGL. Practical applications and experiments illuminate that the proposed approach is feasible and effective.

  11. Implementing WebGL and HTML5 in Macromolecular Visualization and Modern Computer-Aided Drug Design. (United States)

    Yuan, Shuguang; Chan, H C Stephen; Hu, Zhenquan


    Web browsers have long been recognized as potential platforms for remote macromolecule visualization. However, the difficulty in transferring large-scale data to clients and the lack of native support for hardware-accelerated applications in the local browser undermine the feasibility of such utilities. With the introduction of WebGL and HTML5 technologies in recent years, it is now possible to exploit the power of a graphics-processing unit (GPU) from a browser without any third-party plugin. Many new tools have been developed for biological molecule visualization and modern drug discovery. In contrast to traditional offline tools, real-time computing, interactive data analysis, and cross-platform analyses feature WebGL- and HTML5-based tools, facilitating biological research in a more efficient and user-friendly way. Copyright © 2017 Elsevier Ltd. All rights reserved.

  12. Cálculos em glândulas salivares: uma revisão crítica da literatura


    Ferreira, José Lucas Soares; Souto, Ingrid Carneiro Cavalcante; Universidade Federal de Campina Grande; Alves, Emanuelle Ferreira; Oliveira, Heloísa Mara Batista Fernandes de; Alves, Maria Angélica Satyro Gomes; Oliveira Filho, Abrahão Alves de


    O presente estudo objetiva realizar uma revisão critica da literatura sobre sialólitos do ponto de vista de desenvolvimento, etiologia, sintomatologia, diagnóstico e tratamento. Os sialólitos são calcificações que obstruem o interior das glândulas salivares ou o interior de seus ductos, compostos por um núcleo de substância amorfa envolto de íons provenientes da saliva. A sialolitíase é a doença mais comum das glândulas salivares, possui uma predileção por homens de meia idade. Os sialólitos ...

  13. Plasticidade de glândulas tegumentares abdominais em Monoeca xanthopyga Harter-Marques, Cunha & Moure (Hymenoptera, Apidae, Tapinotaspidini

    Directory of Open Access Journals (Sweden)

    Camila Gonçalves dos Santos


    Full Text Available Glândulas tegumentares são amplamente conhecidas em abelhas sociais e responsáveis por diversas funções nestes insetos. Entretanto, pouco se conhece sobre estas glândulas em abelhas solitárias. Monoeca xanthopyga é uma espécie de abelha solitária que exibe comportamento peculiar nas estratégias de acasalamento e no processo de nidificação. Este estudo visa verificar a ocorrência de glândulas tegumentares abdominais e a natureza química de produtos secretados por machos e fêmeas de M. xanthopyga, em dois momentos do ciclo vital: recém-emergidas e em período de nidificação. O material foi estudado utilizando-se microscopia óptica e eletrônica de varredura e histoquímica. Machos e fêmeas recém-emergidas e em período de nidificação apresentam glândulas tegumentares nos tergos III ao VII, entretanto diferem no tipo e na localização. Nos esternos de fêmeas recém-emergidas, as glândulas estão ausentes, já nas fêmeas em período de nidificação estas glândulas estão presentes nos esternos IV ao VI. Nos machos, as glândulas tegumentares estão presentes nos esternos IV ao VI. A análise histoquímica das glândulas tegumentares de machos e fêmeas sugere a presença de produtos de natureza lipídica, possivelmente envolvidos na comunicação relacionada ao comportamento sexual.Plasticity of abdominal tegumentar glands in Monoeca xanthopyga Harter-Marques, Cunha & Moure (Hymenoptera, Apidae, Tapinotaspidini. Tegumentar glands are highly known in social bees and are responsible for a diversity of functions in these insects. However, little is known about these glands in solitary bees. Monoeca xanthopyga is a solitary bee species that shows a singular behavior of mating and nesting. This study is to verify the occurrence of abdominal tegumentar glands and the chemical nature of the products secreted by males and females of M. xanthopyga, at two moments of the vital cycle: just emerged and at the nesting period. The

  14. Vascularização das glândulas adrenais em galinhas da linhagem NPK (Gallus gallus domesticus

    Directory of Open Access Journals (Sweden)

    Vanessa Coutinho do Amaral


    Full Text Available Com o objetivo de contribuir com o conhecimento referente aos arranjos vasculares viscerais, que freqüentemente mostram suficientes variações para diferenciação entre famílias e ordens, utilizamos 34 galinhas da linhagem NPK, com idade aproximada de 10 semanas, eutanasiadas com dose de gás anestésico, tendo marcado seus contingentes arteriais com solução aquosa de Neoprene Látex ¨450¨ a 50 %, corada com corante específico e fixadas em solução aquosa de formol a 10 %, para estudar a vascularização das glândulas adrenais. Assim, os resultados indicam que as glândulas adrenais são órgãos pares, dispostos um em cada antímero, lateralmente à aorta descendente, caudalmente aos pulmões e médio-cranialmente aos rins. Nos dois antímeros, as glândulas adrenais receberam vasos oriundos das artérias adrenais homólogas provenientes da artéria renal cranial e da aorta descendente (ramos diretos. Independentemente da origem, o número de ramos destinados às glândulas adrenais variou de acordo com o antímero, sendo de 1 a 4 para o antímero esquerdo, e de 1 e 3 para o direito. Quanto maior o número de artérias totais e ramos emitidos pelas artérias adrenais contralaterais destinados a um antímero, maior será o número de ramos destinados pelas mesmas ao antímero oposto.

  15. Linfoma tipo MALT de la glándula parótida Lymphoma type MALT of the parotid gland

    Directory of Open Access Journals (Sweden)

    Carlos Frómeta Neira


    Full Text Available Los linfomas tipo MALT (tejido linfoideo asociado a mucosa, constituyen la variedad más recientemente descubierta de los linfomas no Hodgkin, tienen lugar fundamentalmente en la mucosa gástrica asociados a infección por Helycobacter pylori, y en la glándula tiroides en relación con la tiroiditis de Hashimoto. Sin embargo, internacionalmente se han descrito casos en glándulas salivales asociados a linfoadenitis. La naturaleza de la lesión a menudo no puede ser determinada solo por el estudio citológico; se hace necesario el análisis histopatológico para el diagnóstico definitivo en la mayoría de los casos. El presente estudio muestra un paciente masculino con aumento de volumen bilateral de ambas glándulas parótidas y diagnóstico citohistopatológico de un proceso linfoepitelial benigno, el cual desarrolló un linfoma tipo MALT en relación con la glándula parótida derecha.The lymphomas type MALT or the mucosa-associated lymphoid tissue, are the most recent variety of non-Hodgkin lymphomas present mainly in the gastric mucosa associated with Helycobacter pylori infection and in the thyroid gland in relation to Hashimoto's thyroiditis. Frequently the origin of this lesion can't be determined only by cytology study, thus it is necessary the histopathology analysis for a definitive diagnosis in most cases. Present paper includes the case of male patient with bilateral volume increase of both parotid glands and a diagnosis cytopathological of a benign lymphoepithelial process and the development of a type MALT lymphoma in relation to the right parotid gland.

  16. Precision cosmology from future lensed gravitational wave and electromagnetic signals. (United States)

    Liao, Kai; Fan, Xi-Long; Ding, Xuheng; Biesiada, Marek; Zhu, Zong-Hong


    The standard siren approach of gravitational wave cosmology appeals to the direct luminosity distance estimation through the waveform signals from inspiralling double compact binaries, especially those with electromagnetic counterparts providing redshifts. It is limited by the calibration uncertainties in strain amplitude and relies on the fine details of the waveform. The Einstein telescope is expected to produce 10 4 -10 5 gravitational wave detections per year, 50-100 of which will be lensed. Here, we report a waveform-independent strategy to achieve precise cosmography by combining the accurately measured time delays from strongly lensed gravitational wave signals with the images and redshifts observed in the electromagnetic domain. We demonstrate that just 10 such systems can provide a Hubble constant uncertainty of 0.68% for a flat lambda cold dark matter universe in the era of third-generation ground-based detectors.

  17. Clinical effect of 1g/L fluorometholone drops combined with soft corneal contact lens for filamentary keratitis

    Directory of Open Access Journals (Sweden)

    Zhi-Bin Shen


    Full Text Available AIM: To study the clinical effect of 1g/L fluorometholone drops combined with soft corneal contact lens in the treatment of patients with filamentary keratitis. METHODS: A total of 30 patients(45 eyeswere included in this study and were randomly divided into two groups: 16 patients(23 eyeswere in treatment group and 14 patients(22 eyesin control group. In the treatment group, after removed filaments, the patients wore soft corneal contact lens and received corticosteroid eye drops(1g/L fluorometholone dropsand artificial tears(sodium hyaluronate. In the control group, patients received only artificial tears(sodium hyaluronateafter removed filaments. Clinical effects of the two groups were record. The patients were followed up for 3mo.RESULTS: The total clinical effective rate of the patients in the treatment group was significantly higher than that in the control group(22 eyes vs 17 eyes, 96% vs 77%. The difference between two groups had statistical significance(U=1.992, P=0.046. CONCLUSION: The results suggest that 1g/L fluorometholone drops combined with soft corneal contact lens is effective to patients with filamentary keratitis.

  18. Sôbre a glândula de oviduto ímpar de Odozona obscura Schs. (Arctiidae, Lithosiinae

    Directory of Open Access Journals (Sweden)

    Rudolf Barth


    Full Text Available A glândula da fêmea de Odozona obscura está situada na parte terminal do oviduto ímpar (homólogo à vagina. Sua origem é ectodérmica. è composta por um epitélio simples, formando uma dobra dupla, que substitui parcialmente a luz do duto. São apresentadas várias fases da função celular. A célula possui uma zona basal ergastoplasmática e, na parte apical, um rabdório muito alto. As secreções atravessam a cutícula de modo criptócrino, isto é, em gotículas menores que 0,1 µ. A função da glândula é desconhecida, podendo ser uma glândula atraente, ou colágena, produzindo uma substância para colar os ovos sôbre o substrato no momento da postura.

  19. Analysis of the Lunar Gravity Field by Using GL0660B Model and Its Effect on Lunar Satellite Orbit

    Directory of Open Access Journals (Sweden)

    HUANG Kunxue


    Full Text Available The lunar gravity field provides a way to research moon's evolution and probes the interior structure of the moon. It is an important factor influencing the lunar satellite precise orbit determination as well. The new lunar gravity model GL0660B from GRAIL mission dramatically improves the gravity spectrum and spectral ranges. Using the model GL0660B, it can be computed that the corresponding degree-wise RMS and correlation of topography, with which the quality of model GL0660B can be analyzed. Then different characters of the lunar gravity field comparing with other lunar gravity fields are analyzed. Besides, gravity anomaly distribution figures at different height of the models are given, and the character and difference of the lunar gravity models at different height are compared. In addition, lunar satellite orbit revolutionary at different height are modeled by GEODYN. The result shows that the trend of lunar satellite eccentricity changes is a complex and long cycle of change trend. It is different affected by the perturbation of the mascons of different height, which causes different changes of apolune, perilune and eccentricity.



  1. Double inflation

    Energy Technology Data Exchange (ETDEWEB)

    Silk, J.; Turner, M.S.


    The Zel'dovich spectrum of adiabatic density perturbations is a generic prediction of inflation. There is increasing evidence that when the spectrum is normalized by observational data on small scales, there is not enough power on large scales to account for the observed large-scale structure in the Universe. Decoupling the spectrum on large and small scales could solve this problem. As a means of decoupling the large and small scales we propose double inflation (i.e., two episodes of inflation). In this scenario the spectrum on large scales is determined by the first episode of inflation and those on small scales by a second episode of inflation. We present three models for such a scenario. By nearly saturating the large angular-scale cosmic microwave anisotropy bound, we can easily account for the observed large-scale structure. We take the perturbations on small scales to be very large, deltarho/rho approx. = 0.1 to 0.01, which results in the production of primordial black holes (PBHs), early formation of structure, reionization of the Universe, and a rich array of astrophysical events. The ..cap omega..-problem is also addressed by our scenario. Allowing the density perturbations produced by the second episode of inflation to be large also lessens the fine-tuning required in the scalar potential and makes reheating much easier. We briefly speculate on the possibility that the second episode of inflation proceeds through the nucleation of bubbles, which today manifest themselves as empty bubbles whose surfaces are covered with galaxies. 37 refs., 1 fig.

  2. Seeing Double (United States)

    Pesic, Peter


    The separateness and connection of individuals is perhaps the central question of human life: What, exactly, is my individuality? To what degree is it unique? To what degree can it be shared, and how? To the many philosophical and literary speculations about these topics over time, modern science has added the curious twist of quantum theory, which requires that the elementary particles of which everything consists have no individuality at all. All aspects of chemistry depend on this lack of individuality, as do many branches of physics. From where, then, does our individuality come? In Seeing Double, Peter Pesic invites readers to explore this intriguing set of questions. He draws on literary and historical examples that open the mind (from Homer to Martin Guerre to Kafka), philosophical analyses that have helped to make our thinking and speech more precise, and scientific work that has enabled us to characterize the phenomena of nature. Though he does not try to be all-inclusive, Pesic presents a broad range of ideas, building toward a specific point of view: that the crux of modern quantum theory is its clash with our ordinary concept of individuality. This represents a departure from the usual understanding of quantum theory. Pesic argues that what is bizarre about quantum theory becomes more intelligible as we reconsider what we mean by individuality and identity in ordinary experience. In turn, quantum identity opens a new perspective on us. Peter Pesic is a Tutor and Musician-in-Residence at St. John's College, Santa Fe, New Mexico. He has a Ph.D. in physics from Stanford University.

  3. The physico-chemical characteristics of the phosphocholine-containing glycoglycerolipid MfGL-II govern the permeability properties of Mycoplasma fermentans. (United States)

    Ben-Menachem, G; Byström, T; Rechnitzer, H; Rottem, S; Rilfors, L; Lindblom, G


    Mycoplasma fermentans seems to be involved in several pathogenic conditions in humans, and is among other things capable of fusing with T-cells and lymphocytes. The choline-containing phosphoglycolipid 6'-O-(3"-phosphocholine-2"-amino-1"-phospho-1",3"-propanediol)-alpha-D-glucopyranosyl-(1'-->3)-1,2-diacylglycerol (MfGL-II) in the membrane of M. fermentans has been suggested to enhance the fusion process, and the characteristics of MfGL-II were therefore investigated. When a cell culture ages the fraction of MfGL-II increases, and the fraction of the other major membrane lipid, phosphatidylglycerol (PtdGro), decreases concomitantly. Swelling experiments showed that the permeability and osmotic fragility are markedly reduced in aged cells. MfGL-II is selectively released into the surrounding medium when aged M. fermentans cells are incubated in buffer containing EDTA. The physico-chemical properties of MfGL-II were studied by NMR spectroscopy and differential scanning calorimetry, and they can explain the biochemical results. The temperature for the transition between gel and lamellar liquid crystalline (Lalpha) phases is 35-45 degrees C higher for MfGL-II than for PtdGro, which most probably gives rise to the reduced permeability in aged cells. At high water contents MfGL-II forms an Lalpha phase and isotropic aggregates which were interpreted to be vesicles with a radius of approximately 450 A. It is proposed that MfGL-II forms vesicles in the surrounding medium when it is released from the cell membrane. Neither EDTA nor Ca2+ ions have a significant influence on the aggregate structures formed by MfGL-II. Our results indicate that MfGL-II has no fusogenic properties. It is more probable that a recently identified lysolipid in the M. fermentans membrane acts as a fusogen.

  4. Electromagnetic aquametry electromagnetic wave interaction with water and moist substances

    CERN Document Server

    Kupfer, Klaus


    This book covers all aspects of Electromagnetic Aquametry. It summarizes the wide area of metrology and its applications in electromagnetic sensing of moist materials. The physical properties of water in various degrees of binding interacting with electromagnetic fields is presented by model systems. The book describes measurement methods and sensors in the frequency domain, TDR-techniques for environmental problems, methods and sensors for quality assessment of biological substances, and nuclear magnetic resonance techniques. Environmental sciences, as well as civil and geoengineering, fossil fuels, food and pharmaceutical science are the main fields of application. A very wide frequency sprectrum is used for dielectric measurement methods, but the microwave range is clearly dominant. Multiparameter methods as well as methods of principal components and artificial neural networks for density independent measurements are described.

  5. Electromagnetic dissociation of relativistic [sup 28]Si by nucleon emission

    Energy Technology Data Exchange (ETDEWEB)

    Sonnadara, U.J.


    A detailed study of the electromagnetic dissociation of [sup 28]Si by nucleon emission at E[sub lab]/A = 14.6 (GeV/nucleon was carried out with [sup 28]Si beams interacting on [sup 208]Pb). [sup 120]Sn. [sup 64]C targets. The measurements apparatus consists of detectors in the target area which measure the energy and charged multiplicity, and a forward spectrometer which measures the position, momentum and energy of the reaction fragments. The exclusive electromagnetic dissociation cross sections for decay channels having multiple nucleons in the final state have been measured which enables the selection of events produced in pure electromagnetic interactions. The measured cross sections agree well with previous measurements obtained for the removal of a few nucleons as well as with measurements on total charge removal cross sections from other experiments. The dependence of the integrated cross sections on the target charge Z[sub T] and the target mass AT confirms that for higher Z targets the excitation is largely electromagnetic. Direct measurements of the excitation energy for the electromagnetic dissociation of [sup 28]Si [yields] p+[sup 27]Al and [sup 28]Si [yields] n+[sup 27]Si have been obtained through a calculation of the invariant mass in kinematically, reconstructed events. The excitation energy spectrum for all targets peak near the isovector giant dipole resonance in [sup 28]Si. These distributions are well reproduced by combining the photon spectrum calculated using the Weizsaecker-Williams approximation with the experimental data on the photonuclear [sup 28]Si([sub [gamma],p])[sup 27]Al and [sup 28]Si([sub [gamma],n])[sup 27]Si. The possibilities of observing double giant dipole resonance excitations in [sup 28]Si have been investigated with cross section measurements as well as with excitation energy reconstruction.

  6. Electromagnetic Dissociation and Spacecraft Electronics Damage (United States)

    Norbury, John W.


    When protons or heavy ions from galactic cosmic rays (GCR) or solar particle events (SPE) interact with target nuclei in spacecraft, there can be two different types of interactions. The more familiar strong nuclear interaction often dominates and is responsible for nuclear fragmentation in either the GCR or SPE projectile nucleus or the spacecraft target nucleus. (Of course, the proton does not break up, except possibly to produce pions or other hadrons.) The less familiar, second type of interaction is due to the very strong electromagnetic fields that exist when two charged nuclei pass very close to each other. This process is called electromagnetic dissociation (EMD) and primarily results in the emission of neutrons, protons and light ions (isotopes of hydrogen and helium). The cross section for particle production is approximately defined as the number of particles produced in nucleus-nucleus collisions or other types of reactions. (There are various kinematic and other factors which multiply the particle number to arrive at the cross section.) Strong, nuclear interactions usually dominate the nuclear reactions of most interest that occur between GCR and target nuclei. However, for heavy nuclei (near Fe and beyond) at high energy the EMD cross section can be much larger than the strong nuclear interaction cross section. This paper poses a question: Are there projectile or target nuclei combinations in the interaction of GCR or SPE where the EMD reaction cross section plays a dominant role? If the answer is affirmative, then EMD mechanisms should be an integral part of codes that are used to predict damage to spacecraft electronics. The question can become more fine-tuned and one can ask about total reaction cross sections as compared to double differential cross sections. These issues will be addressed in the present paper.

  7. Soft-photon emission effects and radiative corrections for electromagnetic processes at very high energies (United States)

    Gould, R. J.


    Higher-order electromagnetic processes involving particles at ultrahigh energies are discussed, with particular attention given to Compton scattering with the emission of an additional photon (double Compton scattering). Double Compton scattering may have significance in the interaction of a high-energy electron with the cosmic blackbody photon gas. At high energies the cross section for double Compton scattering is large, though this effect is largely canceled by the effects of radiative corrections to ordinary Compton scattering. A similar cancellation takes place for radiative pair production and the associated radiative corrections to the radiationless process. This cancellation is related to the well-known cancellation of the infrared divergence in electrodynamics.

  8. Double hard scattering without double counting (United States)

    Diehl, Markus; Gaunt, Jonathan R.; Schönwald, Kay


    Double parton scattering in proton-proton collisions includes kinematic regions in which two partons inside a proton originate from the perturbative splitting of a single parton. This leads to a double counting problem between single and double hard scattering. We present a solution to this problem, which allows for the definition of double parton distributions as operator matrix elements in a proton, and which can be used at higher orders in perturbation theory. We show how the evaluation of double hard scattering in this framework can provide a rough estimate for the size of the higher-order contributions to single hard scattering that are affected by double counting. In a numeric study, we identify situations in which these higher-order contributions must be explicitly calculated and included if one wants to attain an accuracy at which double hard scattering becomes relevant, and other situations where such contributions may be neglected.

  9. Double hard scattering without double counting

    Energy Technology Data Exchange (ETDEWEB)

    Diehl, Markus [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Gaunt, Jonathan R. [VU Univ. Amsterdam (Netherlands). NIKHEF Theory Group; Schoenwald, Kay [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany)


    Double parton scattering in proton-proton collisions includes kinematic regions in which two partons inside a proton originate from the perturbative splitting of a single parton. This leads to a double counting problem between single and double hard scattering. We present a solution to this problem, which allows for the definition of double parton distributions as operator matrix elements in a proton, and which can be used at higher orders in perturbation theory. We show how the evaluation of double hard scattering in this framework can provide a rough estimate for the size of the higher-order contributions to single hard scattering that are affected by double counting. In a numeric study, we identify situations in which these higher-order contributions must be explicitly calculated and included if one wants to attain an accuracy at which double hard scattering becomes relevant, and other situations where such contributions may be neglected.

  10. Electromagnetic compatibility and interference metrology (United States)

    Ma, M. T.; Kanda, M.


    The material included in the report is intended for a short course on electromagnetic compatibility/interference (EMC/EM) metrology. The entire course is presented in nine chapters with the introductory part given as Chapter 1. The particular measurement topics to be covered are: (1) open sites (Chapters 2 and 6), (2) transverse electromagnetic cells (Chapter 3), (3) techniques for measuring the electromagnetic shielding of materials (Chapter 4), (4) anechoic chambers (Chapter 5), and (5) reverberating chambers (Chapter 8). In addition, since small probe antennas play an important role in some of the EMC/EMI measurements discussed, a separate chapter on various probe systems developed at NBS is given in Chapter 7. Selected contemporary EMI topics such as the characterization and measurement of a complex EM environment, interferences in the form of out-of-band receptions to an antenna, and some conducted EMI problems are also briefly discussed (Chapter 9).

  11. Electromagnetic fields in biological systems

    CERN Document Server

    Lin, James C


    As wireless technology becomes more sophisticated and accessible to more users, the interactions of electromagnetic fields with biological systems have captured the interest not only of the scientific community but also the general public. Unintended or deleterious biological effects of electromagnetic fields and radiation may indicate grounds for health and safety precautions in their use. Spanning static fields to terahertz waves, Electromagnetic Fields in Biological Systems explores the range of consequences these fields have on the human body. With contributions by an array of experts, topics discussed include: Essential interactions and field coupling phenomena, highlighting their importance in research on biological effects and in scientific, industrial, and medical applications Electric field interactions in cells, focusing on ultrashort, pulsed high-intensity fields The effect of exposure to naturally occurring and human-made static, low-frequency, and pulsed magnetic fields in biological systems Dosi...

  12. Electromagnetic Transients in Power Cables

    DEFF Research Database (Denmark)

    Silva, Filipe Faria Da; Bak, Claus Leth

    of electromagnetic phenomena associated to their operation, among them electromagnetic transients, increased as well. Transient phenomena have been studied since the beginning of power systems, at first using only analytical approaches, which limited studies to more basic phenomena; but as computational tools became...... more powerful, the analyses started to expand for the more complex phenomena. Being old phenomena, electromagnetic transients are covered in many publications, and classic books such as the 40-year-old Greenwood’s ‘‘Electric Transients in Power Systems’’ are still used to this day. However...... example.However, the book is not only intended for students . It can also be used by engineers who work in this area and need to understand the challenges/problems they are facing or who need to learn how to prepare their simulation models as well as their function. It also shows how to calculate...

  13. Objects of maximum electromagnetic chirality

    CERN Document Server

    Fernandez-Corbaton, Ivan


    We introduce a definition of the electromagnetic chirality of an object and show that it has an upper bound. The upper bound is attained if and only if the object is transparent for fields of one handedness (helicity). Additionally, electromagnetic duality symmetry, i.e. helicity preservation upon scattering, turns out to be a necessary condition for reciprocal scatterers to attain the upper bound. We use these results to provide requirements for the design of such extremal scatterers. The requirements can be formulated as constraints on the polarizability tensors for dipolar scatterers or as material constitutive relations. We also outline two applications for objects of maximum electromagnetic chirality: A twofold resonantly enhanced and background free circular dichroism measurement setup, and angle independent helicity filtering glasses.

  14. Electromagnetic contributions to pseudoscalar masses

    CERN Document Server

    Basak, S; Bernard, C; DeTar, C; Freeland, E; Freeman, W; Foley, J; Gottlieb, Steven; Heller, U M; Hetrick, J E; Laiho, J; Levkova, L; Oktay, M; Osborn, J; Sugar, R L; Torok, A; Toussaint, D; Van de Water, R S; Zhou, R


    We report on the calculation by the MILC Collaboration of the electromagnetic effects on kaon and pion masses. These masses are computed in QCD with dynamical (asqtad staggered) quarks plus quenched photons at three lattice spacings varying from 0.12 to 0.06 fm. The masses are fit to staggered chiral perturbation theory with NLO electromagnetic terms, as well as analytic terms at higher order. We extrapolate the results to physical light-quark masses and to the continuum limit. At the current stage of the analysis, most, but not all, of the systematic errors have been estimated. The main goal is the comparison of kaon electromagnetic splittings to those of the pion, i.e., an evaluation of the corrections to "Dashen's theorem." This in turn will allow us to significantly reduce the systematic errors in our determination of m_u/m_d.

  15. Moving Manifolds in Electromagnetic Fields

    Directory of Open Access Journals (Sweden)

    David V. Svintradze


    Full Text Available We propose dynamic non-linear equations for moving surfaces in an electromagnetic field. The field is induced by a material body with a boundary of the surface. Correspondingly the potential energy, set by the field at the boundary can be written as an addition of four-potential times four-current to a contraction of the electromagnetic tensor. Proper application of the minimal action principle to the system Lagrangian yields dynamic non-linear equations for moving three dimensional manifolds in electromagnetic fields. The equations in different conditions simplify to Maxwell equations for massless three surfaces, to Euler equations for a dynamic fluid, to magneto-hydrodynamic equations and to the Poisson-Boltzmann equation.

  16. CIME School on "Computational Electromagnetism"

    CERN Document Server

    Valli, Alberto


    Presenting topics that have not previously been contained in a single volume, this book offers an up-to-date review of computational methods in electromagnetism, with a focus on recent results in the numerical simulation of real-life electromagnetic problems and on theoretical results that are useful in devising and analyzing approximation algorithms. Based on four courses delivered in Cetraro in June 2014, the material covered includes the spatial discretization of Maxwell’s equations in a bounded domain, the numerical approximation of the eddy current model in harmonic regime, the time domain integral equation method (with an emphasis on the electric-field integral equation) and an overview of qualitative methods for inverse electromagnetic scattering problems. Assuming some knowledge of the variational formulation of PDEs and of finite element/boundary element methods, the book is suitable for PhD students and researchers interested in numerical approximation of partial differential equations and scienti...

  17. Circuit modeling for electromagnetic compatibility

    CERN Document Server

    Darney, Ian B


    Very simply, electromagnetic interference (EMI) costs money, reduces profits, and generally wreaks havoc for circuit designers in all industries. This book shows how the analytic tools of circuit theory can be used to simulate the coupling of interference into, and out of, any signal link in the system being reviewed. The technique is simple, systematic and accurate. It enables the design of any equipment to be tailored to meet EMC requirements. Every electronic system consists of a number of functional modules interconnected by signal links and power supply lines. Electromagnetic interference

  18. Electromagnetic compatibility principles and applications

    CERN Document Server

    Weston, David A


    This totally revised and expanded reference/text provides comprehensive, single-source coverage of the design, problem solving, and specifications of electromagnetic compatibility (EMC) into electrical equipment/systems-including new information on basic theories, applications, evaluations, prediction techniques, and practical diagnostic options for preventing EMI through cost-effective solutions. Offers the most recent guidelines, safety limits, and standards for human exposure to electromagnetic fields! Containing updated data on EMI diagnostic verification measurements, as well as over 900 drawings, photographs, tables, and equations-500 more than the previous edition

  19. Mathematical methods of electromagnetic theory

    CERN Document Server

    Friedrichs, Kurt O


    This text provides a mathematically precise but intuitive introduction to classical electromagnetic theory and wave propagation, with a brief introduction to special relativity. While written in a distinctive, modern style, Friedrichs manages to convey the physical intuition and 19th century basis of the equations, with an emphasis on conservation laws. Particularly striking features of the book include: (a) a mathematically rigorous derivation of the interaction of electromagnetic waves with matter, (b) a straightforward explanation of how to use variational principles to solve problems in el

  20. Electromagnetic geothermometry theory, modeling, practice

    CERN Document Server

    Spichak, Viacheslav V


    Electromagnetic Geothermometry explores, presents and explains the new technique of temperature estimation within the Earth's interior; the Electromagnetic technique will identify zones of geothermal anomalies and thus provides locations for deep drilling. This book includes many case studies from geothermal areas such as Travale (Italy), Soultz-sous-Forêts (France) and Hengill (Iceland), allowing the author and reader to draw conclusions regarding the dominating heat transfer mechanisms, location of its sources and to constrain the locations for drilling of the new boreholes. Covering a to

  1. Integral equation methods for electromagnetics

    CERN Document Server

    Volakis, John


    This text/reference is a detailed look at the development and use of integral equation methods for electromagnetic analysis, specifically for antennas and radar scattering. Developers and practitioners will appreciate the broad-based approach to understanding and utilizing integral equation methods and the unique coverage of historical developments that led to the current state-of-the-art. In contrast to existing books, Integral Equation Methods for Electromagnetics lays the groundwork in the initial chapters so students and basic users can solve simple problems and work their way up to the mo

  2. Measurement of advanced electromagnetic radiation


    Bajlo, Darko


    For the purpose of detecting advanced electromagnetic radiation predicted by Wheeler-Feynman absorber theory for the case of incomplete absorption of retarded electromagnetic radiation, pulses in duration of 6 ns to 24 ns, wavelength from 91 cm to 200 cm where supplied to three different transmitting antennas. Detection was done with a λ/20 monopole antenna in the advanced time window at a time 2r/c before the arrival of the center of the retarded pulse. At distances ranging from 430 cm to 18...

  3. Electromagnetic reciprocity in antenna theory

    CERN Document Server

    Stumpf, Martin


    The reciprocity theorem is among the most intriguing concepts in wave field theory and has become an integral part of almost all standard textbooks on electromagnetic (EM) theory. This book makes use of the theorem to quantitatively describe EM interactions concerning general multiport antenna systems. It covers a general reciprocity-based description of antenna systems, their EM scattering properties, and further related aspects. Beginning with an introduction to the subject, Electromagnetic Reciprocity in Antenna Theory provides readers first with the basic prerequisites before offering coverage of the equivalent multiport circuit antenna representations, EM coupling between multiport antenna systems and their EM interactions with scatterers, accompanied with the corresponding EM compensation theorems.

  4. Loss of Sh3gl2/Endophilin A1 Is a Common Event in Urothelial Carcinoma that Promotes Malignant Behavior12 (United States)

    Majumdar, Shyama; Gong, Edward M; Di Vizio, Dolores; Dreyfuss, Jonathan; DeGraff, David J; Hager, Martin H; Park, Peter J; Bellmunt, Joaquim; Matusik, Robert J; Rosenberg, Jonathan E; Adam, Rosalyn M


    Urothelial carcinoma (UC) causes substantial morbidity and mortality worldwide. However, the molecular mechanisms underlying urothelial cancer development and tumor progression are still largely unknown. Using informatics analysis, we identified Sh3gl2 (endophilin A1) as a bladder urothelium-enriched transcript. The gene encoding Sh3gl2 is located on chromosome 9p, a region frequently altered in UC. Sh3gl2 is known to regulate endocytosis of receptor tyrosine kinases implicated in oncogenesis, such as the epidermal growth factor receptor (EGFR) and c-Met. However, its role in UC pathogenesis is unknown. Informatics analysis of expression profiles as well as immunohistochemical staining of tissue microarrays revealed Sh3gl2 expression to be decreased in UC specimens compared to nontumor tissues. Loss of Sh3gl2 was associated with increasing tumor grade and with muscle invasion, which is a reliable predictor of metastatic disease and cancer-derived mortality. Sh3gl2 expression was undetectable in 19 of 20 human UC cell lines but preserved in the low-grade cell line RT4. Stable silencing of Sh3gl2 in RT4 cells by RNA interference 1) enhanced proliferation and colony formation in vitro, 2) inhibited EGF-induced EGFR internalization and increased EGFR activation, 3) stimulated phosphorylation of Src family kinases and STAT3, and 4) promoted growth of RT4 xenografts in subrenal capsule tissue recombination experiments. Conversely, forced re-expression of Sh3gl2 in T24 cells and silenced RT4 clones attenuated oncogenic behaviors, including growth and migration. Together, these findings identify loss of Sh3gl2 as a frequent event in UC development that promotes disease progression. PMID:23814487

  5. Parametric Instabilities of Electromagnetic Waves in Plasmas, (United States)

    A simple formalism for the parametric decay of an intense, coherent electromagnetic wave into an electrostatic wave and scattered electromagnetic ... waves in a homogeneous plasma is developed. Various instabilities including Brillouin and Raman backscattering, Compton scattering, filamentation and

  6. Higher-order techniques in computational electromagnetics

    CERN Document Server

    Graglia, Roberto D


    Higher-Order Techniques in Computational Electromagnetics explains 'high-order' techniques that can significantly improve the accuracy, computational cost, and reliability of computational techniques for high-frequency electromagnetics, such as antennas, microwave devices and radar scattering applications.

  7. Electromagnetic Compatibility of Devices on Hybrid Electromagnetic Components (United States)

    Konesev, S. G.; Khazieva, R. T.; Kirillov, R. V.; Gainutdinov, I. Z.; Kondratyev, E. Y.


    There is a general tendency to reduce the weight and dimensions, the consumption of conductive and electrical insulating materials, increase the reliability and energy efficiency of electrical devices. In recent years, designers have been actively developing devices based on hybrid electromagnetic components (HEMC) such as inductive-capacitive converters (ICC), voltages pulse generators (VPG), secondary power supplies (SPS), capacitive storage devices (CSD), induction heating systems (IHS). Sources of power supplies of similar electrical devices contain, as a rule, links of increased frequency and function in key (pulse) modes, which leads to an increase in electromagnetic interference (EMI). Nonlinear and periodic (impulse) loads, non-sinusoidal (pulsation) of the electromotive force and nonlinearity of the internal parameters of the source and input circuits of consumers distort the shape of the input voltage lead to an increase in thermal losses from the higher harmonic currents, aging of the insulation, increase in the weight of the power supply filter units, resonance at higher harmonics. The most important task is to analyze the operation of electrotechnical devices based on HEMC from the point of view of creating EMIs and assessing their electromagnetic compatibility (EMC) with power supply systems (PSS). The article presents the results of research on the operation of an IHS, the operation principle of a secondary power supply source of which is based on the operation of a half-bridge autonomous inverter, the switching circuit of which is made in the form of a HEMC, called the «multifunctional integrated electromagnetic component»" (MIEC).

  8. Bathymetry, electromagnetic streamlines and the marine controlled source electromagnetic method (United States)

    Pethick, Andrew; Harris, Brett


    Seafloor topography must influence the strength and direction of electromagnetic fields generated during deep ocean controlled source electromagnetic surveying. Neither mathematical equation nor rules of thumb provide a clear perspective of how changes in water column thickness alters electromagnetic fields that engulf hundreds of cubic kilometres of air, ocean, host and reservoir. We use streamline visualisation to provide a generalised representation of how electromagnetic fields propagate into a 2D geo-electrical setting that includes strong bathymetry. Of particular interest are: (i)' dead zones' where electric fields at the ocean floor are demonstrated to be weak and (ii) the 'airwave' that appears in the electric field streamlines as circulating vortices with a shape that is clearly influenced by changes in ocean depth. Our analysis of the distribution of electric fields for deep and shallow water examples alludes to potential benefits from placement of receivers and/or transmitters higher in the water column as is the case for towed receiver geometries. Real-time streamline representation probably holds the most value at the survey planning stage, especially for shallow water marine EM surveys where ocean bottom topography is likely to be consequential.



  10. Detección y localización inmunohistoquímica del receptor de leptina en la glándula paratiroides de ratas


    Vidal Carrascosa, Ángela


    Premio extraordinario de Trabajo Fin de Máster curso 2015-2016. Medicina, Sanidad y Mejora Animal La glándula paratiroides es una glándula endocrina involucrada en la homeostasis del calcio mediante la producción de la parathormona (PTH). La relación existente entre los niveles de leptina y PTH en obesidad e hiperparatiroidismo sugiere la presencia de receptores de leptina en la glándula paratiroides. La leptina es una adipoquina cuya función principal es la regulación del metabolismo ener...

  11. Cistomatose de glândula apócrina em onça-pintada (Panthera onca

    Directory of Open Access Journals (Sweden)

    Leonardo Gruchouskei

    Full Text Available RESUMO: A cistomatose de glândula apócrina é uma condição rara e não-neoplásica, que tem sido relatada em cães e gatos, e caracterizada por vários grupos de glândulas sudoríparas dilatadas, cuja distribuição generalizada raramente é observada. Uma fêmea de onça-pintada melânica (Panthera onca, com idade estimada de 16 anos e mantida em cativeiro, apresentou aumento de volume abdominal. Ao exame físico foram observados vários nódulos de consistência macia e flutuante, não aderidos, com tamanho de 2 a 15cm de diâmetro, na região ventral abdominal. Outras massas de menor diâmetro (0,5-1,0cm estavam presentes na região cervical e no dorso do animal. Estas massas foram removidas em um procedimento cirúrgico. Dentro deste cisto havia conteúdo líquido, inodoro e translúcido. Microscopicamente, observou-se entre a derme média e profunda a formação de múltiplos cistos de tamanho variável. Esses cistos eram revestidos por uma única camada de células predominantemente cubóides. Em alguns focos eram observadas raras projeções papiliformes de epitélio glandular. O citoplasma estava levemente eosinofílico e com raras imagens de decapitação do ápice. O diagnóstico de cistomatose de glândulas apócrinas foi realizado através dos achados macroscópicos e microscópicos.

  12. Dynamics of prolonged salt movement in the Glückstadt Graben (NW Germany) driven by tectonic and sedimentary processes (United States)

    Warsitzka, Michael; Kley, Jonas; Jähne-Klingberg, Fabian; Kukowski, Nina


    The formation of salt structures exerted a major influence on the evolution of subsidence and sedimentation patterns in the Glückstadt Graben, which is part of the Central European Basin System and comprises a post-Permian sediment thickness of up to 11 km. Driven by regional tectonics and differential loading, large salt diapirs, salt walls and salt pillows developed. The resulting salt flow significantly influenced sediment distribution in the peripheral sinks adjacent to the salt structures and overprinted the regional subsidence patterns. In this study, we investigate the geometric and temporal evolution of salt structures and subsidence patterns in the central Glückstadt Graben. Along a key geological cross section, the post-Permian strata were sequentially decompacted and restored in order to reconstruct the subsidence history of minibasins between the salt structures. The structural restoration reveals that subsidence of peripheral sinks and salt structure growth were initiated in Early to Middle Triassic time. From the Late Triassic to the Middle Jurassic, salt movement and salt structure growth never ceased, but were faster during periods of crustal extension. Following a phase from Late Jurassic to the end of the early Late Cretaceous, in which minor salt flow occurred, salt movement was renewed, particularly in the marginal parts of the Glückstadt Graben. Subsidence rates and tectonic subsidence derived from backstripping of 1D profiles reveal that especially the Early Triassic and Middle Keuper times were periods of regional extension. Three specific types of salt structures and adjacent peripheral sinks could be identified: (1) Graben centre salt walls possessing deep secondary peripheral sinks on the sides facing away from the basin centre, (2) platform salt walls, whose main peripheral sinks switched multiple times from one side of the salt wall to the other, and (3) Graben edge pillows, which show only one peripheral sink facing the basin centre.

  13. Sonda permeabilizadora en el tratamiento de la disfunción obstructiva de las glándulas de Meibomio

    Directory of Open Access Journals (Sweden)

    Taimí Cárdenas Díaz

    Full Text Available El ojo seco constituye una de las principales afecciones de la superficie ocular por la que acuden las personas a la consulta de Oftalmología. El 70 % de los pacientes con este diagnóstico presentan algún signo relacionado con la enfermedad de las glándulas de Meibomio y su control con los tratamientos habituales continúa siendo un problema. Las compresas calientes y los lavados con champú infantil darán alivio temporal, pero por lo general son abandonados por los pacientes. Otro enfoque es la expresión de las glándulas de Meibomio, la cual es molesta y por lo general necesita realizarse más de una vez; de ahí que el sondeo quirúrgico de esta sea una alternativa a utilizar. El sondaje mediante las sondas de Maskin introducidas desde el 2009 constituye una nueva modalidad terapéutica, la cual, de acuerdo con el conocimiento de los autores, no había sido introducida previamente en el país. La no disponibilidad de sondas con este fin en Cuba fue la motivación para diseñarla con el objetivo de permeabilizar los conductos excretores en la disfunción obstructiva de las glándulas de Meibomio (O- MGD, y así implementar esta técnica. Este dispositivo se construyó con medios propios en el taller de prototipos del laboratorio, de acuerdo con las características anatómicas del sistema glandular. Actualmente se usa de manera regular por doctores con resultados alentadores, como en los casos que se presentan.

  14. Conduta conservadora no carcinoma papilífero da glândula tireóide

    Directory of Open Access Journals (Sweden)

    Josias de Andrade Sobrinho

    Full Text Available OBJETIVO: Avaliar os resultados do tratamento do carcinoma papilífero limitado a um lobo da glândula tireóide, através de tireoidectomia parcial com seguimento superior a cinco anos. MÉTODO: Estudo retrospectivo de 105 prontuários de pacientes portadores de carcinoma diferenciado da glândula tireóidea operados no Departamento de Cirurgia de Cabeça e Pescoço e Otorrinolaringologia do Hospital Heliópolis, Hosphel, São Paulo de 1977 a 1997 e selecionados 31 casos que apresentavam nódulos limitados a um lobo da glândula com seguimento superior a cinco anos e submetidos à lobectomia total mais istmectomia. RESULTADOS: Observamos somente um caso (3% de disfonia transitória com paresia de prega vocal unilateral que regrediu espontaneamente. Não houve casos de hipoparatireoidismo transitório ou definitivo. O seguimento médio foi de 12,6 anos, sendo todos com seguimento superior a cinco anos; 10 casos (32% com seguimento entre 10 e 15 anos e 10 casos (32% com seguimento além de 15 anos. Não foram observados casos com recorrência loco-regional ou metástase à distância, estando todos eles assintomáticos e sem doença. CONCLUSÃO: Nesta série, a tireoidectomia parcial para carcinoma papilífero limitado a um lobo, mostrou-se eficaz.

  15. Aberrant cryptic responsiveness of the pCAT 3- and pGL3-promoter reporter vectors. (United States)

    Giannakis, G; Edmondson, S R; Favaloro, J M; Zajac, J D; Greenland, K J


    Transfection analyses are an informative method to assess the activity of specific promoter or enhancer elements in mammalian cells. Commercially available reporter vectors can be extremely useful investigative tools for such studies. This study reports that the pCAT 3- and pGL3-promoter vectors display cryptic responsiveness to androgens when they contain a DNA insert, while the empty vector, a commonly used negative control, is nonresponsive. Our studies initially aimed to characterize novel androgen-responsive DNA sequences in human genomic DNA through transactivational analyses. An isolated DNA fragment, designated ARC-3, contained three putative androgen response element "half-sites" and was androgen-responsive when cloned into the pCAT3-promoter vector. While we originally believed this to be a novel enhancer element, subsequent analyses of this clone revealed that this vector displays cryptic activity in the presence of an androgen. This was confirmed by cloning several unrelated DNA fragments that did not contain any known classic response elements into the pCAT3-promoter vector, all of which were found to be responsive. The empty vector (negative control) was again nonresponsive. The ARC-3 DNA fragment was also weakly responsive to stimulation when cloned into the pGL3-promotor vector, which is identical to the pCAT3-promoter vector, with the exception of an intron located 5' of the chloramphenicol acetyltransferase gene, and the reporter genes. This work demonstrates that both the pCAT3- and pGL3-promoter vectors are inappropriate to assess androgen-responsive enhancers and emphasizes the importance of the careful selection of reporter vectors and controls when conducting transactivational analysis.

  16. Avaliação pós-radioterápica de glândulas salivares maiores


    Galli, Susane D'Arc Barcelos Britto


    Objetivo: Este estudo objetivou avaliar a xerostomia por meio de questionário e objetivamente analisou-se o volume das glândulas salivares maiores pela TC e a função e excreção por meio de cintilografia, antes e após a radioterapia. Materiais e Métodos: Neste estudo prospectivo foram selecionados 28 pacientes, 22 homens e 6 mulheres, com idade que variou entre 18 e 75 anos, com diagnóstico histopatológico de carcinoma espinocelular na região de cabeça e pescoço. Os pacientes foram exami...

  17. Real Time Position Detection by Using GPS+GSM+GPRS and Arduino Mega Based Telit GL865


    Baki Koyuncu; ZeynepÖzdemir


    A web application on a mobile platform is developed by using GPS, GSMand GPRSon an Arduino Mega board to determine the object positions in real time.The system receives the GPS position data and sends it to a distant server through a GSM channel by using GPRS and an Arduino Mega board. Position data is displayed on a Google map on the server or a mobile cell phone. U BloxLea is deployed as the GPS device, Telit GL865 is used as the combined GSM and GPRS devices. GPS data is received every 1 s...

  18. A new anti-glioma therapy, AG119: pre-clinical assessment in a mouse GL261 glioma model. (United States)

    Towner, Rheal A; Ihnat, Michael; Saunders, Debra; Bastian, Anja; Smith, Nataliya; Pavana, Roheeth Kumar; Gangjee, Aleem


    High grade gliomas (HGGs; grades III and IV) are the most common primary brain tumors in adults, and their malignant nature ranks them fourth in incidence of cancer death. Standard treatment for glioblastomas (GBM), involving surgical resection followed by radiation and chemotherapy with temozolomide (TMZ) and the anti-angiogenic therapy bevacizumab, have not substantially improved overall survival. New therapeutic agents are desperately needed for this devastating disease. Here we study the potential therapeutic agent AG119 in a pre-clinical model for gliomas. AG119 possesses both anti-angiogenic (RTK inhibition) and antimicrotubule cytotoxic activity in a single molecule. GL261 glioma-bearing mice were either treated with AG119, anti-VEGF (vascular endothelial growth factor) antibody, anti c-Met antibody or TMZ, and compared to untreated tumor-bearing mice. Animal survival was assessed, and tumor volumes and vascular alterations were monitored with morphological magnetic resonance imaging (MRI) and perfusion-weighted imaging, respectively. Percent survival of GL261 HGG-bearing mice treated with AG119 was significantly higher (p < 0.001) compared to untreated tumors. Tumor volumes (21-31 days following intracerebral implantation of GL261 cells) were found to be significantly lower for AG119 (p < 0.001), anti-VEGF (p < 0.05) and anti-c-Met (p < 0.001) antibody treatments, and TMZ-treated (p < 0.05) mice, compared to untreated controls. Perfusion data indicated that both AG119 and TMZ were able to reduce the effect of decreasing perfusion rates significantly (p < 0.05 for both), when compared to untreated tumors. It was also found that IC50 values for AG119 were much lower than those for TMZ in T98G and U251 cells. These data support further exploration of the anticancer activity AG119 in HGG, as this compound was able to increase animal survival and decrease tumor volumes in a mouse GL261 glioma model, and that AG119 is also not subject to methyl guanine

  19. Ultraestrutura e função das glândulas salivares de Podisus nigrispinus (Hemiptera: Pentatomidae)


    Castrillon, Luis Carlos Martinez


    Podisus nigrispinus Dallas (Hemiptera: Pentatomidae) é um inseto zoofitófago com potencial para controle biológico, pois ninfas e adultos predam diversos insetos, inserindo o aparelho bucal e injetando o conteúdo das glândulas salivares no interior das presas, causando a morte das mesmas. Entretanto, os compostos tóxicos da saliva desse inseto, responsáveis pela morte das presas são ainda desconhecidos. Como primeira etapa para a identificação das possíveis substâncias presentes na saliva de ...

  20. Cystadenoma: a rare tumor originated in minor salivary gland Cistadenoma: um tumor raro em glândula salivar menor

    Directory of Open Access Journals (Sweden)

    Jean Nunes dos Santos


    Full Text Available Cystadenoma of salivary glands is an uncommon benign neoplasm that presents intraluminal papillary projections. The authors describe one case of cystadenoma located in the buccal mucosa and highlight its histomorphological features and differential diagnosis.O cistadenoma de glândula salivar é uma neoplasia benigna incomum, que exibe projeções papilíferas intraluminais. Os autores descrevem um caso de cistadenoma localizado na mucosa jugal, discutindo os aspectos histomorfológicos e o diagnóstico diferencial desse tumor.

  1. Alteraciones estructurales de la glándula tiroidea tras la radioterapia Structural alterations of thyroid gland after radiotherapy

    Directory of Open Access Journals (Sweden)

    Caridad Verdecia Cañizares


    Full Text Available INTRODUCCIÓN. El objetivo de la presente publicación fue comunicar los casos detectados en nuestro estudio de anomalías estructurales de la glándula tiroidea en pacientes que recibieron radioterapia para el tratamiento de tumores malignos de cabeza y cuello. MÉTODOS. Se realizó un estudio descriptivo de corte transversal para determinar la prevalencia de alteraciones estructurales de la glándula tiroides en 43 pacientes sobrevivientes de tumores malignos de cabeza y cuello, que habían recibido radioterapia y que fueron atendidos en los Hospitales Pediátricos Docentes «William Soler» y «Juan Manuel Márquez» en un período de 10 años (1990 a 2000. RESULTADOS. La alteración estructural de la glándula tiroides más frecuente fue la fibrosis glandular (18,5 %, seguida del adenoma tiroideo y de quistes simples de la glándula (11,1 % respectivamente. Hubo 2 casos de carcinoma diferenciado de la glándula tiroides (7,4 % y uno de lesión mixta adenofolicular (3,7 %. La citología aspirativa con aguja fina permitió la detección de la mayoría de estas lesiones y posibilitó, guiada por ecografía, la detección de lesiones intraparenquimatosas de la glándula. El tratamiento de las alteraciones encontradas fue quirúrgico y se practicó tiroidectomía total a los dos pacientes con carcinoma diferenciado de la glándula tiroides, tiroidectomía subtotal a los tres pacientes con quistes de la glándula y adenomas tiroideos. En los casos de fibrosis glandular se detectó hipofunción tiroidea concomitante, por tanto se administró tratamiento sustitutivo con levotiroxina. CONCLUSIONES. La citología aspirativa con aguja fina guiada mediante ecografía de la glándula tiroides permitió diagnosticar alteraciones estructurales no detectadas en el examen físico. La patología maligna más irradiada correspondió a los linfomas no Hodgkin. Cuanto mayor es la dosis de irradiación, mayor es la patología tiroidea.INTRODUCTION: The aim of

  2. Research for visualization of running state of long-distance water transmission pipeline based on OpenGL (United States)

    Zhang, Xiaoping; Xu, Xuejun; Liu, Bing; Zhang, Zhendong


    The running condition of long distance water pipeline are complicated and changeable, and the lag of water flow is obvious, which is the key technical problem to be solved in the process of regulation and control. According to the present situation of the long-distance water conveyance project, the visualization simulation technology is used to study the operation and management of the long-distance water conveyance pipeline based on OpenGL technology. The system developed in this paper can combine pipeline information, working condition data and relevant data to provide a visualization platform for analysis and decision-making of project management and operation.

  3. Landau levels for electromagnetic wave

    CERN Document Server

    Zyuzin, Vladimir A


    In this paper we show that the frequencies of propagating electromagnetic wave (photon) in rotating dielectric media obey Landau quantization. We show that the degeneracy of right and left helicities of photons is broken on the lowest Landau level. In spatially homogeneous system this level is shown to be helical, i.e. left and right helical photons counter-propagate.

  4. Solved problems in classical electromagnetism

    CERN Document Server

    Franklin, Jerrold


    This original Dover publication is the companion to a new edition of the author's Classical Electromagnetism: Second Edition. The latter volume will feature only basic answers; this book will contain some problems from the reissue as well as many other new ones. All feature complete, worked-out solutions and form a valuable source of problem-solving material for students.

  5. Nanocomposites for electromagnetic radiation protection (United States)

    Petrunin, V. F.


    Specific features that characterize nanoparticles and which are due to their small size and allow one to enhance the interaction between the electromagnetic radiation and nanostructured materials and to develop the effective protection of man and equipment against harmful uncontrolled radiation are reported. Examples of the development of nanocomposite radar absorbing materials that can be used for protection of man and equipment are presented.

  6. Electromagnetic Levitation of a Disc (United States)

    Valle, R.; Neves, F.; de Andrade, R., Jr.; Stephan, R. M.


    This paper presents a teaching experiment that explores the levitation of a disc of ferromagnetic material in the presence of the magnetic field produced by a single electromagnet. In comparison to the classical experiment of the levitation of a sphere, the main advantage of the proposed laboratory bench is that the uniform magnetic field…

  7. Electromagnetic pulses bone healing booster (United States)

    Sintea, S. R.; Pomazan, V. M.; Bica, D.; Grebenisan, D.; Bordea, N.


    Posttraumatic bone restoration triggered by the need to assist and stimulate compensatory bone growth in periodontal condition. Recent studies state that specific electromagnetic stimulation can boost the bone restoration, reaching up to 30% decrease in recovery time. Based on the existing data on the electromagnetic parameters, a digital electronic device is proposed for intra oral mounting and bone restoration stimulation in periodontal condition. The electrical signal is applied to an inductive mark that will create and impregnate magnetic field in diseased tissue. The device also monitors the status of the electromagnetic field. Controlled wave forms and pulse frequency signal at programmable intervals are obtained with optimized number of components and miniaturized using surface mounting devices (SMD) circuits and surface mounting technology (SMT), with enhanced protection against abnormal current growth, given the intra-oral environment. The system is powered by an autonomous power supply (battery), to limit the problems caused by powering medical equipment from the main power supply. Currently the device is used in clinical testing, in cycles of six up to twelve months. Basic principles for the electrical scheme and algorithms for pulse generation, pulse control, electromagnetic field control and automation of current monitoring are presented, together with the friendly user interface, suitable for medical data and patient monitoring.

  8. Airborne electro-magnetic system

    Energy Technology Data Exchange (ETDEWEB)


    Tridem is a three-frequency in-phase and quadrature measuring, fixed configuration, airborne electromagnetic system developed by Scintrex. It has been in operation in Canada since 1975. It is expected that the system will be used in high resolution, multiple natural resource surveys for base metals, uranium, sand and gravel, coal, lignite, groundwater and civil engineering purposes.

  9. Explanations, Education, and Electromagnetic Fields. (United States)

    Friedman, Sharon M.

    Explaining complex scientific and environmental subjects in the mass media is difficult to do, particularly under such constraints as short deadlines and lack of space or time. When a scientific controversy and human health risk are involved, this becomes an even harder task to accomplish. The subject of electromagnetic fields (EMF) involves…

  10. Contributions of Maxwell to Electromagnetism

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 8; Issue 5. Contributions of Maxwell to Electromagnetism. P V Panat. General Article Volume 8 Issue 5 May 2003 pp 17-29. Fulltext. Click here to view fulltext PDF. Permanent link: Keywords.

  11. Radiation leakage from electromagnetic oven

    Directory of Open Access Journals (Sweden)

    Abdurrahman Khalil


    Results & Discussions: The measurements have been done at some houses in Erbil city, according to the source of background radiation exist before measuring data. Our data compared with standard safe range of radiation data. Results showed that there is radiation leak form all type of electromagnetic oven and all at the order of safety compared with standard value.

  12. Cardiovascular Responses to Electromagnetic Radiation

    African Journals Online (AJOL)

    Dr Olaleye Samuel

    fatigue. ABSTRACT. Electromagnetic signaling has recently greatly increased due to mobile telephony and computers some of which radiate much and have wide spectra. The radiations are also reflected and thus form standing waves with incoming ones. In cities both the direct and reflected radiations form complex ...

  13. Nanocomposites for electromagnetic radiation protection

    Energy Technology Data Exchange (ETDEWEB)

    Petrunin, V. F., E-mail: [National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) (Russian Federation)


    Specific features that characterize nanoparticles and which are due to their small size and allow one to enhance the interaction between the electromagnetic radiation and nanostructured materials and to develop the effective protection of man and equipment against harmful uncontrolled radiation are reported. Examples of the development of nanocomposite radar absorbing materials that can be used for protection of man and equipment are presented.

  14. Analysis of electromagnetic enhancement by a groove doublet in gold substrate. (United States)

    Zhang, Siwen; Liu, Haitao; Mu, Guoguang


    A semianalytical Fabry-Perot model is presented to investigate the electromagnetic enhancement by double grooves in gold substrate. The influence of hybrid wave (HW) propagating along the metal surface on field enhancement is explored systematically with a HW model. Simulation results imply that the hybrid generated by one groove can affect the mode fields in the other groove after propagating along the metallic surface. Giant electromagnetic field intensity at resonance condition is found for the groove distance of 0.6λ with the contribution of surface waves, which is nearly independent of the incidence wavelength and groove width.

  15. Health hazards and electromagnetic fields. (United States)

    Saunders, T


    Biological rhythms, physical wellbeing and mental states are dependent on our electrical brainwave system interacting with the extremely weak electromagnetic fields generated by the Earth's telluric and Cosmic radiations. In a single generation, since the evolution of humankind over millions of years, we are exposed to a wide range of powerful, artificially generated electromagnetic radiation which adversely affects the subtle balance in nature's energy fields and has become the source of so-called 'diseases of civilization'. This also includes electromagnetic sensitivity. Generally, there is a lack of awareness and understanding of the impact electromagnetic fields can have upon health and wellbeing.Our ancestors were acutely aware that certain locations, were perceived to have a positive energy field which was beneficial to health and vitality. Over time, these areas are now referred to as sacred sites for spiritual ceremony and as healing centres. In contrast, there are other geographical locations that can have a negative effect upon health and these are known as geopathic stress zones. It is believed that such zones can interfere with the brain's normal function that inhibits the release of melatonin and other endocrine secretions needed to replenish the immune system. Geopathic stress can affect animals and plant life as well as human beings and significantly contributes to sick building syndrome (SBS). Whilst there is an increasing body of opinion amongst eminent researchers and scientists who are addressing these issues, the establishment professions are slow to change. However, very gradually, modern allopathic medicine and attitudes are beginning to recognise the extraordinary wisdom and efficacy of ancient traditions such as acupuncture, light, colour and other therapies based on the understanding and treatment of the interaction of a person's electromagnetic subtle body and the immediate environment. These and many other 'complementary' therapies may

  16. A System for Electromagnetic Field Conversion

    DEFF Research Database (Denmark)


    A system is provided for conversion of a first electromagnetic field into a desired second electromagnetic field, for example for coupling modes between waveguides or into microstructured waveguides. The system comprises a complex spatial electromagnetic field converter that is positioned...... for reception of at least a part of the first electromagnetic field and that is adapted for conversion of the received field into the desired electromagnetic field, and wherein at least one of the first and second fields matches a mode of a microstructured waveguide. It is an important advantage of the present...

  17. Cross-spectral purity of electromagnetic fields. (United States)

    Hassinen, Timo; Tervo, Jani; Friberg, Ari T


    We extend Mandel's scalar-wave concept of cross-spectral purity to electromagnetic fields. We show that in the electromagnetic case, assumptions similar to the scalar cross-spectral purity lead to a reduction formula, analogous with the one introduced by Mandel. We also derive a condition that shows that the absolute value of the normalized zeroth two-point Stokes parameter of two cross-spectrally pure electromagnetic fields is the same for every frequency component of the field. In analogy with the scalar theory we further introduce a measure of the cross-spectral purity of two electromagnetic fields, namely, the degree of electromagnetic cross-spectral purity.

  18. Colgajo bilateral de perforantes lumbares para reconstrucción glútea tras infiltración por modelantes

    Directory of Open Access Journals (Sweden)

    J. Gordillo-Hernández


    Full Text Available La inyección de sustancias modelantes es un procedimiento usado desde el siglo XIX para mejorar el contorno corporal con fines estéticos. Durante la última década ha aumentado la demanda de técnicas quirúrgicas para la reconstrucción de los defectos originados tras la resección de unidades anatómicas afectadas por infiltración de estas sustancias modelantes, haciendo que en ocasiones tengamos que recurrir al empleo de expansores cutáneos, injertos, colgajos locales, colgajos regionales e incluso, a colgajos libres. Describimos el proceso de reconstrucción glútea en caso de infiltración de sustancias modelantes en el que tuvimos que emplear un colgajo de perforantes lumbares debido a su fiabilidad, a que preserva la musculatura, a su versatilidad de diseño sin comprometer otras posibles alternativas reconstructivas y por su baja morbilidad. Analizamos también la anatomía, diseño, técnica quirúrgica e indicaciones específicas de estos colgajos de perforantes de la región glútea.

  19. Análise histoquímica das glândulas anexas do aparelho reprodutor do macho de paca (Cuniculus paca

    Directory of Open Access Journals (Sweden)

    Aretuza C. Capalbo

    Full Text Available RESUMO: A paca (Cuniculus paca é um roedor típico de regiões tropicais. Com a finalidade de estudar esta espécie selvagem para manejo adequado e sua preservação, objetivou-se neste trabalho caracterizar a histoquímica das glândulas anexas do trato reprodutor do macho da paca. Para este fim, cortes histológicos dessas glândulas foram submetidas às reações histoquímicas com Ácido Periódico de Schiff (PAS, Alcian blue (AB, PAS. + AB. e PAS + Amilase. Na glândula bulbouretral foi constatado que o epitélio produz secreção rica em glicoproteínas neutras e ácidas, glicosaminoglicanas, e em algumas regiões produz mais de um tipo de secreção. Não foi observada a presença de glicogênio no epitélio. Na glândula vesicular, seu epitélio em borda em escova corou-se por glicoproteínas neutras e também por substância de composição desconhecida, não contendo glicoproteínas ácidas, glicogênio ou glicosaminoglicanas. Verificou-se presença de pequena quantidade de glicoproteínas ácidas e neutras na próstata, em especial na mucosa, além de glicoproteínas ácidas carboxiladas e sulfatadas em pequena quantidade no tecido conjuntivo da lâmina própria dessa glândula. Por fim, a glândula coaguladora apresentou pequena quantidade de glicoproteínas neutras na borda em escova de seu epitélio e substância de composição desconhecida, sendo ausente o glicogênio. Conclui-se que as glândulas anexas do trato reprodutor da paca apresentam características histoquímicas que compartilham certa similaridade com outras espécies da ordem Rodentia, com a presença de glicoproteínas neutras e ácidas em algumas glândulas, principalmente no epitélio da glândula bulbouretal e na borda em escova do epitélio das demais glândulas.

  20. Properties of dynamical electromagnetic metamaterials (United States)

    Padilla, Willie J.; Averitt, Richard D.


    Electromagnetic metamaterials consist of two or three dimensional arrays of tailored metallic and/or dielectric inclusions and provide unprecedented sub-wavelength control over light-matter interactions. Metamaterials are fashioned to yield a specific response to the electric and magnetic components of light and may be treated as effective media, described by effective optical constants {μ }{{eff}} and {{ɛ }}{{eff}}, and have realized a multitude of exotic properties difficult to achieve with natural materials. An inductive-capacitive unit cell geometry provides enhanced values of optical constants, as well as the ability to dynamically control the novel responses exhibited by electromagnetic metamaterials. The ability of metamaterials to achieve real-time dynamic properties has realized novel applications and has made them relevant for the next revolution in advanced materials and related devices.

  1. Simple Electromagnetic Analysis in Cryptography

    Directory of Open Access Journals (Sweden)

    Zdenek Martinasek


    Full Text Available The article describes the main principle and methods of simple electromagnetic analysis and thus provides an overview of simple electromagnetic analysis.The introductions chapters describe specific SPA attack used visual inspection of EM traces, template based attack and collision attack.After reading the article, the reader is sufficiently informed of any context of SEMA.Another aim of the article is the practical realization of SEMA which is focused on AES implementation.The visual inspection of EM trace of AES is performed step by step and the result is the determination of secret key Hamming weight.On the resulting EM trace, the Hamming weight of the secret key 1 to 8 was clearly visible.This method allows reduction from the number of possible keys for following brute force attack.

  2. Hydrological Aspects of Electromagnetic Surveys

    Directory of Open Access Journals (Sweden)

    Baden G. Williams


    Full Text Available Interpreting Electromagnetic (EM surveys - Electromagnetic induction techniques have now largely replaced previous descriptive, and largely subjective, techniques used for soil salinity surveys. The question then is a matter of how to interpret the EM data. A very clear linkage exists between Apparent Electrical Conductivity (ECa and the total soluble salts in the upper soil profile. This, in turn, can be interpreted as reflecting the degree of vertical/ lateral leaching of soluble salts, or of salt accumulation in the profile. Topography, depth to groundwater and groundwater salinity also appear to affect ECa, although they are not suited to rapid survey techniques and do not necessarily have a direct relationship with either the total salt content of the upper soil profile or the ECa values. The interpretation of isoconductivity maps in terms of the degree of leaching of the soil profile from point to point provides an added hydrological management perspective to EM soil salinity surveys.

  3. Asymptotic symmetries and electromagnetic memory (United States)

    Pasterski, Sabrina


    Recent investigations into asymptotic symmetries of gauge theory and gravity have illuminated connections between gauge field zero-mode sectors, the corresponding soft factors, and their classically observable counterparts — so called "memories". Namely, low frequency emissions in momentum space correspond to long time integrations of the corre-sponding radiation in position space. Memory effect observables constructed in this manner are non-vanishing in typical scattering processes, which has implications for the asymptotic symmetry group. Here we complete this triad for the case of large U(1) gauge symmetries at null infinity. In particular, we show that the previously studied electromagnetic memory effect, whereby the passage of electromagnetic radiation produces a net velocity kick for test charges in a distant detector, is the position space observable corresponding to th Weinberg soft photon pole in momentum space scattering amplitudes.

  4. Piglet nasal microbiota at weaning may influence the development of Glässer's disease during the rearing period. (United States)

    Correa-Fiz, Florencia; Fraile, Lorenzo; Aragon, Virginia


    The microbiota, the ensemble of microorganisms on a particular body site, has been extensively studied during the last few years, and demonstrated to influence the development of many diseases. However, these studies focused mainly on the human digestive system, while the populations in the respiratory tract have been poorly assessed, especially in pigs. The nasal mucosa of piglets is colonized by an array of bacteria, many of which are unknown. Among the early colonizers, Haemophilus parasuis also has clinical importance, since it is also the etiological agent of Glässer's disease. This disease produces economical losses in all the countries with pig production, and the factors influencing its development are not totally understood. Hence, the purpose of this work was to characterize the nasal microbiota composition of piglets, and its possible role in Glässer's disease development. Seven farms from Spain (4 with Glässer's disease and 3 control farms without any respiratory disease) and three farms from UK (all control farms) were studied. Ten piglets from each farm were sampled at 3-4 weeks of age before weaning. The total DNA extracted from nasal swabs was used to amplify the 16S RNA gene for sequencing in Illumina MiSeq. Sequencing data was quality filtered and analyzed using QIIME software. The diversity of the nasal microbiota was low in comparison with other body sites, showing a maximum number of operational taxonomic units (OTUs) per pig of 1,603, clustered in five phyla. Significant differences were found at various taxonomical levels, when the microbiota was compared regarding the farm health status. Healthy status was associated to higher species richness and diversity, and UK farms demonstrated the highest diversity. The composition of the nasal microbiota of healthy piglets was uncovered and different phylotypes were shown to be significantly altered in animals depending on the clinical status of the farm of origin. Several OTUs at genus level were

  5. Clinical observation on 1g/L bromfenac sodium hydrate ophthalmic solution associated with glucocorticoid in high myopia after LASEK

    Directory of Open Access Journals (Sweden)

    Qing-He Li


    Full Text Available AIM:To observe the efficacy and safety of 1g/L bromfenac sodium hydrate ophthalmic solution in the partial substitution of glucocorticoid after laser subepithelial keratomileusis(LASEK. METHODS: Totally 104 cases(208 eyeswere received LASEK, which were selected and divided into study group and control group. The study group were adopted 1g/L bromfenac sodium hydrate ophthalmic solution combined with tobramycin dexamethasone eye drops and fluorometholone eye drops, the control group were adopted tobramycin dexamethasone eye drops and fluorometholone eye drops. The changes of visual acuity and intraocular pressure of two groups were recorded before and after surgery, and the score of painness and the occurrence of haze were observed after surgery. RESULTS: At postoperative 1, 2, 3d, respectively, the pain score of the study group were 1.70±0.35, 1.25±0.34, 0.82±0.32, the pain score of the control group were 2.30±0.43, 1.68±0.44, 1.12±0.33, the differences were significant(PP>0.05, and the differences were not significant(P>0.05. At preoperative and postoperative 1, 2wk, 1 and 3mo of surgery, respectively, the intraocular pressure of study group were 17.33±1.58, 7.54±1.28, 7.23±1.58, 7.26±1.47, and 7.30±1.36 mmHg; the intraocular pressure of control group were 17.53±1.43,7.57±1.32,7.73±1.55,7.80±1.38,7.86±1.43 mmHg,the differences were not significant between before and at 2wk after surgery(P>0.05, the differences were significant between the two groups at 2wk, 1mo and 3mo(PP>0.05. CONCLUSION: It is safe and effective that 1g/L bromfenac sodium hydrate ophthalmic solution in the partial substitution of glucocorticoid after laser subepithelial keratomileusis. The patient has a lower intraocular pressure, has similar therapeutic effect as glucocorticoid in vision and antiinflammatory.

  6. Transplante de glândulas salivares labiais no tratamento de olho seco em cães pela autoenxertia

    Directory of Open Access Journals (Sweden)

    Leticia Séra Castanho


    Full Text Available OBJETIVO: Avaliar os efeitos clínicos da secreção das glândulas salivares labiais como alternativa de lubrificação ocular para alívio do olho seco, em casos moderados, severos e refratários ao tratamento clínico, através da técnica de transposição de glândulas salivares labiais para o fórnice conjuntival pela autoenxertia. MÉTODOS: Foram selecionados 17 cães os quais apresentavam olho seco autoimune sem reposta satisfatória ao tratamento clínico. O teste lacrimal de Schirmer e o tempo de ruptura do filme lacrimal foram realizados no pré-operatório para avaliar a quantidade e a qualidade da lágrima produzida. Os pacientes foram submetidos aos exames oftálmicos completos no pré-operatório, a cada 15 dias por dois meses e a cada 30 dias por mais dois meses, totalizando seis retornos pós-operatórios. No pré-operatório e em todos os pós-operatórios fotografias digitais foram tiradas para o arquivo fotográfico. Utilizou-se o programa photoshop para avaliação e marcação dos neovasos corneanos em todos os retornos. RESULTADOS: Houve redução em todos os casos da secreção mucopurulenta, hiperemia conjuntival e blefarospasmo, bem como estabilização de lesões pré-existentes e redução importante do número de neovasos corneanos. A transposição resultou na melhora do tempo de ruptura do filme lacrimal, porém sem alterações significativas no teste de Schirmer. CONCLUSÃO: O transplante das glândulas salivares labiais para o fórnice conjuntival é um procedimento de fácil execução, rápido, eficaz, acessível a qualquer cirurgião veterinário oftalmologista e de grande valia para casos moderados e severos de ceratoconjuntivite seca não responsivos às medicações existentes.

  7. Double outlet right ventricle (United States)

    ... Double outlet right ventricle To use the sharing features on this page, please enable JavaScript. Double outlet right ventricle (DORV) is a heart disease that is ...

  8. Relativistic approach to electromagnetic imaging


    Budko, Neil


    A novel imaging principle based on the interaction of electromagnetic waves with a beam of relativistic electrons is proposed. Wave-particle interaction is assumed to take place in a small spatial domain, so that each electron is only briefly accelerated by the incident field. In the one-dimensional case the spatial distribution of the source density can be directly observed in the temporal spectrum of the scattered field. Whereas, in the two-dimensional case the relation between the source a...

  9. Electromagnetic Calorimeter for HADES Experiment

    Directory of Open Access Journals (Sweden)

    Rodríguez-Ramos P.


    Full Text Available Electromagnetic calorimeter (ECAL is being developed to complement dilepton spectrometer HADES. ECAL will enable the HADES@FAIR experiment to measure data on neutral meson production in heavy ion collisions at the energy range of 2-10 AGeV on the beam of future accelerator SIS100@FAIR. We will report results of the last beam test with quasi-monoenergetic photons carried out in MAMI facility at Johannes Gutenberg Universität Mainz.

  10. Health effects of electromagnetic fields.


    Peter Gajšek


    Abstract: Devices that emit electromagnetic fields (EMF) have become a part of our daily life and can be found in telecommunications, industry, traffic, science, medicine and in every household. Due to the fact that general public is massively exposed to the EMF, even very small health effects could become a serious public health problem. Many studies show that the EMF above a certain threshold can have a negative health impact. The studies, which could explain the question of health risks as...

  11. Electromagnetism Tutorial (Tutorial de Eletromagnetismo)


    Dantas, Christine C.


    The present tutorial aims at covering the fundamentals of electromagnetism, in a condensed and clear manner. Some solved and proposed exercises have been included. The reader is assumed to have knowledge of basic electricity, partial derivatives and multiple integrals. ----- O presente tutorial visa cobrir os fundamentos do eletromagnetismo, de forma condensada e clara. Alguns exercicios resolvidos e propostos foram incluidos. Assume-se conhecimento de eletricidade basica, derivadas parciais ...

  12. Exponential beams of electromagnetic radiation


    Bialynicki-Birula, Iwo; Bialynicka-Birula, Zofia


    We show that in addition to well known Bessel, Hermite-Gauss, and Laguerre-Gauss beams of electromagnetic radiation, one may also construct exponential beams. These beams are characterized by a fall-off in the transverse direction described by an exponential function of rho. Exponential beams, like Bessel beams, carry definite angular momentum and are periodic along the direction of propagation, but unlike Bessel beams they have a finite energy per unit beam length. The analysis of these beam...

  13. Electromagnetic forces in photonic crystals


    Antonoyiannakis, M. I.; Pendry, J. B.


    We develop a general methodology for numerical computations of electromagnetic (EM) fields and forces in matter, based on solving the macroscopic Maxwell's equations in real space and adopting the Maxwell Stress Tensor formalism. Our approach can be applied to both dielectric and metallic systems of frequency-dependent dielectric function; as well as to objects of any size and geometrical properties in principle. We are particularly interested in calculating forces on nanostructures. We find ...

  14. Do electromagnetic fields induce cancer?


    飯島,純夫; 山縣, 然太朗; 浅香,昭雄


    Recently public concern about the carcinogenic effects of electromagnetic fields(EMF) has been increasing. We reviewed the published literature and current problems relating to possible carcinogenic effects of residential and occupational exposure to EMF. There are several suggestions that such an exposure may increase the risk of cancer, but these studies failed to provide conclusive indications. Further studies including improved prospective studies and biological experiments using EMF and ...

  15. Joint Electromagnetic Spectrum Management Operations (United States)


    effects of EMP can extend to hundreds of kilometers depending on the height and yield of a nuclear burst. A high-altitude electromagnetic pulse ( HEMP ...can generate significant disruptive field strengths over a continental-size area. The portion of the EMS most affected by EMP and HEMP is the radio...commander can prohibit any RF emitter from operating when there is anticipated interference to mission-essential EM equipment. The installation

  16. The law of electromagnetic induction

    Directory of Open Access Journals (Sweden)

    V.J. Kutkovetskyy


    Full Text Available Mathematical models of the electromagnetic induction law which do not take into account Faraday’s restrictions are not in full accordance with the physical phenomenon and so they are not laws. Their incomplete correspondence with real devices results in such "paradoxes" as unlimited magnetic field of unipolar generators, infinite sizes of inductors for DC and AC machines modeled, and so on.

  17. Electromagnetic hypersensitivity: Fact or fiction?

    Energy Technology Data Exchange (ETDEWEB)

    Genuis, Stephen J., E-mail: [University of Alberta (Canada); Lipp, Christopher T. [Faculty of Medicine at the University of Calgary (Canada)


    As the prevalence of wireless telecommunication escalates throughout the world, health professionals are faced with the challenge of patients who report symptoms they claim are connected with exposure to some frequencies of electromagnetic radiation (EMR). Some scientists and clinicians acknowledge the phenomenon of hypersensitivity to EMR resulting from common exposures such as wireless systems and electrical devices in the home or workplace; others suggest that electromagnetic hypersensitivity (EHS) is psychosomatic or fictitious. Various organizations including the World Health Organization as well as some nation states are carefully exploring this clinical phenomenon in order to better explain the rising prevalence of non-specific, multi-system, often debilitating symptoms associated with non-ionizing EMR exposure. As well as an assortment of physiological complaints, patients diagnosed with EHS also report profound social and personal challenges, impairing their ability to function normally in society. This paper offers a review of the sparse literature on this perplexing condition and a discussion of the controversy surrounding the legitimacy of the EHS diagnosis. Recommendations are provided to assist health professionals in caring for individuals complaining of EHS. - Highlights: Black-Right-Pointing-Pointer Many people report symptoms when near devices emanating electromagnetic fields(EMF). Black-Right-Pointing-Pointer Electromagnetic hypersensitivity (EHS) research has generated conflicting outcomes. Black-Right-Pointing-Pointer Recent evidence suggests pathophysiological change in some individuals with EHS. Black-Right-Pointing-Pointer EHS patients consistently report profound social and personal challenges. Black-Right-Pointing-Pointer Clinicians need to be apprised of the EHS condition and potential interventions.

  18. Electromagnetic brake/clutch device (United States)

    Vranish, John M.


    An electromagnetic brake/clutch device includes a drive shaft supported by at least one bearing for transmitting torque, a housing, affixed to prevent its rotation, surrounding the drive shaft, and an electromagnetically activated device within the housing to selectively prevent and allow rotation of the drive shaft. The electromagnetically activated device includes a plurality of cammed rollers to prevent counter-clockwise rotation of the drive shaft. The drive shaft includes a circumferential disk and the housing includes a reaction ring for engagement with the plurality of cammed rollers. The plurality of cammed rollers are released from engagement with the circumferential disk and the reaction ring by a plurality of tripping mechanisms within the housing. The tripping action uses the locking force to act as a release force merely by changing the boundary conditions of the roller interface angles. The tripping mechanisms include trippers for disengaging the plurality of cammed rollers and an anvil shaped portion for providing lateral movement of the trippers. The plurality of cammed rollers is preloaded to engagement with the circumferential disk and reaction ring by a spring, and is located with respect to an adjacent tripping mechanism with another spring.

  19. New Electromagnetic Absorbers Composed of Left-handed and Right-handed Materials (United States)

    Fang, Weihai; Xu, Shanjia


    New double-layered electromagnetic absorbers are presented in this paper. The new absorbers composed of one lossy left-handed material absorbing layer and one impedance matching layer consisted of lossless right-handed material. It is indicated that the reflection loss of below -20dB can be obtained in the frequency range 7GHz 13GHz. Power attenuation achieving -50dB of narrow frequency band electromagnetic absorbers can also be obtained by modulate permittivity of right-handed material. Furthermore, the thickness of the whole absorbing structure is only 2mm, which is particularly helpful in some practical applications. The presented results are of reference significance for accurate design of the new electromagnetic absorbers and of practical prospects for stealth technology.

  20. Double Outlet Right Ventricle (United States)

    ... Right Ventricle Menu Topics Topics FAQs Double Outlet Right Ventricle Double outlet right ventricle (DORV) is a rare form of congenital heart disease. Article Info En español Double outlet right ventricle (DORV) is a rare form of congenital ...

  1. Clinical Assessment of the RHUMART System Based on the Use of Pulsed Electromagnetic Fields with Low Frequency. (United States)

    Begue-Simon, A-M.; Drolet, R. A.


    Difficulties in using the double-blind method of evaluation with use of Pulsed Electromagnetic Fields led to an open evaluation with 96 patients with musculoskeletal diseases, neurological disorders, circulatory diseases, or gastroenterological diseases. This paper reports the impact of use on dependency, pain, and patient satisfaction. (DB)

  2. La glándula uropigia de aves de distintos ambientes: su estructura y función


    Chiale, María Cecilia


    La glándula uropigia de las aves es un órgano sebáceo compacto ubicado dorsalmente sobre las últimas vértebras caudales. Es muy variable en cuanto a su forma y tamaño pero, generalmente, está formada por dos lóbulos y en su extremo caudal posee una papila; en ésta última región se encuentran los poros excretores que suelen ser dos en la mayoría de las aves, pero en algunos casos se observó que éste número puede ser mayor. También es posible encontrar un pincel de plumas rodeando los poros exc...

  3. Revisión bibliográfica de los tumores de la glándula lagrimal


    Bañón Navarro, Raquel


    Analizar la patología tumoral de la Glándula Lagrimal en su extensión clínica, diagnóstica, terapéutica y vital. MATERIAL Y MÉTODOS La literatura científica en esta revisión bibliográfica procede de las bases de información médica LILACS, SCIENCEDIRECT, MEDLINE Y COCHRANE. Los Medical Subject Headings fueron “lacrimal gland” y “tumor lacrimal gland”. Los artículos científicos seleccionados fueron valorados por el cuestionario CASPe y la declaración de STROBE para valor...

  4. Alergia ao glúten: série de nove casos = Gluten allergy: series of nine cases

    Directory of Open Access Journals (Sweden)

    Maia, Estefânia Barrosa


    Conclusões: A alergia ao glúten é rara, explicando o pequeno número diagnosticado em 15 anos, em um hospital central de referência. Os nove casos tiveram início no primeiro ano de vida, sendo as manifestações cutâneas as mais frequentes. O eczema foi uma apresentação frequente e a sensibilização foi por via cutânea em alguns casos. A alergia alimentar múltipla também foi frequente nos casos descritos. Três das nove crianças resolveram a alergia até os seis anos, tendo em comum uma manifestação inicial cutânea. Nestes nove casos, o valor de IgE específica não foi preditivo da evolução clínica

  5. [Construction of pGL3-SM22-SCAP (D443N) eukaryotic expression vector and its expression in CHO cells]. (United States)

    Wang, Yuanyuan; Hu, Jieli; Cui, Jing; Huang, Ailong; Ruan, Xiongzhong; Chen, Yaxi


    The experiment was designed to investigate the function of SREBP cleavage-activating protein (SCAP) mutant (D443N) by constructing an eukaryotic expressive vector using a smooth muscle specific promoter SM22 (pGL3-SM22-SCAP(D443N)). SM22 promoter (pSM22) was amplified from genome DNA of mice by nested PCR, and then cloned into pMD-T vector. The SM22 promoter fragment released from the vector by Kpn I and Hind III digestion was sub-cloned into pGL3-control-Luc vector, to form pGL3-SM22-Luc. The activity of pSM22 in human vascular smooth muscle cells (VSMCs) was tested using Dual-Luciferase Reporter System. SCAP(D443) mutant amplified from plasmid pTK-HSV-SCAP(D443N) and pSM22 from mice liver were cloned into pGL3-control vector to construct pGL3-SM22-SCAP(D443N) which was transfected into Chinese hamster ovary cells (CHO) to test SCAP(D443) expression by real-time PCR and Western blot. The sequence and construction of pGL3-SM22-SCAP(D443N) were correct. SM22 promoter activity initiated the expression of luciferase in VSMCs and also drove SCAP(D443) expression in transfected CHO cells. The pGL3-SM22-SCAP(D443N) eukaryotic expression vector was successfully constructed and the recombinant vector provides a powerful approach in investigating the function and regulation of SCAP and also in producing vascular smooth muscle specific SCAP transgenic mice.

  6. Targeting Protein Kinase CK2: Evaluating CX-4945 Potential for GL261 Glioblastoma Therapy in Immunocompetent Mice (United States)

    Ferrer-Font, Laura; Villamañan, Lucia; Arias-Ramos, Nuria; Vilardell, Jordi; Plana, Maria; Ruzzene, Maria; Pinna, Lorenzo A.; Itarte, Emilio; Arús, Carles; Candiota, Ana Paula


    Glioblastoma (GBM) causes poor survival in patients even with aggressive treatment. Temozolomide (TMZ) is the standard chemotherapeutic choice for GBM treatment but resistance always ensues. Protein kinase CK2 (CK2) contributes to tumour development and proliferation in cancer, and it is overexpressed in human GBM. Accordingly, targeting CK2 in GBM may benefit patients. Our goal has been to evaluate whether CK2 inhibitors (iCK2s) could increase survival in an immunocompetent preclinical GBM model. Cultured GL261 cells were treated with different iCK2s including CX-4945, and target effects evaluated in vitro. CX-4945 was found to decrease CK2 activity and Akt(S129) phosphorylation in GL261 cells. Longitudinal in vivo studies with CX-4945 alone or in combination with TMZ were performed in tumour-bearing mice. Increase in survival (p < 0.05) was found with combined CX-4945 and TMZ metronomic treatment (54.7 ± 11.9 days, n = 6) when compared to individual metronomic treatments (CX-4945: 24.5 ± 2.0 and TMZ: 38.7 ± 2.7, n = 6) and controls (22.5 ± 1.2, n = 6). Despite this, CX-4945 did not improve mice outcome when administered on every/alternate days, either alone or in combination with 3-cycle TMZ. The highest survival rate was obtained with the metronomic combined TMZ+CX-4945 every 6 days, pointing to the participation of the immune system or other ancillary mechanism in therapy response. PMID:28208677

  7. Targeting Protein Kinase CK2: Evaluating CX-4945 Potential for GL261 Glioblastoma Therapy in Immunocompetent Mice

    Directory of Open Access Journals (Sweden)

    Laura Ferrer-Font


    Full Text Available Glioblastoma (GBM causes poor survival in patients even with aggressive treatment. Temozolomide (TMZ is the standard chemotherapeutic choice for GBM treatment but resistance always ensues. Protein kinase CK2 (CK2 contributes to tumour development and proliferation in cancer, and it is overexpressed in human GBM. Accordingly, targeting CK2 in GBM may benefit patients. Our goal has been to evaluate whether CK2 inhibitors (iCK2s could increase survival in an immunocompetent preclinical GBM model. Cultured GL261 cells were treated with different iCK2s including CX-4945, and target effects evaluated in vitro. CX-4945 was found to decrease CK2 activity and Akt(S129 phosphorylation in GL261 cells. Longitudinal in vivo studies with CX-4945 alone or in combination with TMZ were performed in tumour-bearing mice. Increase in survival (p < 0.05 was found with combined CX-4945 and TMZ metronomic treatment (54.7 ± 11.9 days, n = 6 when compared to individual metronomic treatments (CX-4945: 24.5 ± 2.0 and TMZ: 38.7 ± 2.7, n = 6 and controls (22.5 ± 1.2, n = 6. Despite this, CX-4945 did not improve mice outcome when administered on every/alternate days, either alone or in combination with 3-cycle TMZ. The highest survival rate was obtained with the metronomic combined TMZ+CX-4945 every 6 days, pointing to the participation of the immune system or other ancillary mechanism in therapy response.

  8. Efeito da substituição da farinha de trigo no desenvolvimento de biscoitos sem glúten

    Directory of Open Access Journals (Sweden)

    Tamires dos Santos VIEIRA


    Full Text Available Resumo O glúten pode determinar a qualidade da farinha de trigo, conferindo às massas características como elasticidade e capacidade de absorver água, o que torna a elaboração de produtos de panificação isentos de glúten um desafio. Desse modo, o presente estudo buscou avaliar as características físico-químicas e sensoriais de biscoitos elaborados com ingredientes sucedâneos ao trigo, como fécula de mandioca, farinha de soja, de quinoa e de amaranto. Para a caracterização física foram determinados: peso, diâmetro, espessura, fator de expansão e volume específico. Quanto à composição química foram determinados: umidade, cinzas, proteínas, lipídios, fibras alimentares, carboidratos totais, energia, além de pH e acidez. A aceitabilidade foi determinada por meio de uma escala hedônica de nove pontos. As formulações contendo farinhas sucedâneas ao trigo apresentaram bom rendimento, maior teor de cinzas, de proteínas, de lipídios e de fibras alimentares. Também, essas apresentaram percentuais de aceitabilidade superiores a 70%, exceto para a avaliação do sabor da amostra com maior teor de soja (40 g/100g. Conclui-se que as formulações contendo farinhas sucedâneas ao trigo podem ser consideradas promissoras, disponibilizando alternativas alimentares àqueles que almejam produtos com valor nutricional superior e posicionamento único no mercado, visto que os produtos disponíveis muitas vezes possuem baixo valor nutritivo ao serem elaborados com farinhas amiláceas.

  9. Salinivibrio costicola GL6, a Novel Isolated Strain for Biotransformation of Caffeine to Theobromine Under Hypersaline Conditions. (United States)

    Ashengroph, Morahem


    The present study has been conducted towards isolation of moderately halophilic bacteria capable of transforming caffeine into theobromine. A total of 45 caffeine-degrading moderate halophiles were enriched from hypersaline lakes and examined for the biotransformation of caffeine to theobromine by thin-layer chromatography (TLC) and high-performance liquid chromatography analyses. Strain GL6, giving the highest yield of theobromine, was isolated from the Hoz Soltan Lake, 20 % w/v salinity, central Iran, and identified as Salinivibrio costicola based on morphological and biochemical features as well as its 16S rRNA gene sequence analysis (GeneBank Accession No. KT378066) and DNA-DNA relatedness. The biotransformation of caffeine with strain GL6 leads to the formation of two metabolites, identified as theobromine and paraxanthine, but the yield of paraxanthine was much lower. Further study on the production of theobromine from caffeine under resting cell experiment was carried out subsequently. The optimal yield of theobromine (56 %) was obtained after a 32-h incubation using 5 mM of caffeine and 15 g l-1 (wet weight) of biomass in 0.1 M saline phosphate buffer (pH 7.0 and 10 % w/v NaCl) under agitation 180 rpm at 30 °C. The biotransformed theobromine was purified by preparative TLC and subjected to FTIR and mass spectroscopy for chemical identification. This is the first evidence for biotransformation of caffeine into theobromine by strains of the genus Salinivibrio.

  10. Regular consumption of a complementary food fortified with ascorbic acid and ferrous fumarate or ferric pyrophosphate is as useful as ferrous sulfate in maintaining hemoglobin concentrations >105 g/L in young Bangladeshi children. (United States)

    Davidsson, Lena; Sarker, Shafiqual Alam; Jamil, Kazi Asif; Sultana, Shamima; Hurrell, Richard


    Non-water-soluble iron compounds have been reported to be less well absorbed than ferrous sulfate in young children, and concern has been raised about their usefulness as food fortificants. The objective was to evaluate the usefulness of ferrous fumarate and ferric pyrophosphate, compared with ferrous sulfate, in maintaining hemoglobin concentrations >105 g/L in Bangladeshi children. Two hundred thirty-five children aged 7-24 mo (hemoglobin >105 g/L) were randomly assigned in a double-blind study to receive an infant cereal fortified with ferrous fumarate, ferric pyrophosphate, or ferrous sulfate. One serving of cereal (9.3 mg Fe; molar ratio of ascorbic acid to iron of 3:1) was consumed per day, 6 d/wk, for 9 mo. Blood samples were drawn at 4.5 and 9 mo. Raw data were reformatted, and a "time to event" was calculated that corresponded to reaching the following thresholds: hemoglobin 10 mg/L at baseline, 4.5 mo, or 9 mo. Data were censored when children did not reach the threshold or were lost to follow-up. A Kaplan-Meier approach was used to compare the 3 groups. No statistically significant differences were observed for hemoglobin 10 mg/L (P = 0.508). Contrary to earlier concerns, these results do not indicate differences in usefulness between water-soluble and non-water-soluble iron compounds in maintaining hemoglobin concentrations and preventing iron deficiency. These data will be important in the development of food-fortification strategies to combat anemia and iron deficiency in highly vulnerable population groups.

  11. From Engineering Electromagnetics to Electromagnetic Engineering: Using Computational Electromagnetics for Synthesis Problems


    TIJHUIS, Anton G.; BEURDEN, Martijn C. van; HON, Bastiaan P. de


    In this paper, a two-stage approach is proposed for using computational electromagnetics in antenna engineering. First, stochastic optimization techniques are used in combination with approximate models. Second, line-search techniques are combined with full-wave modeling. For the first stage, we show an illustrative example. The second stage is considered in detail; both the acceleration of the underlying field computations and the implementation of the optimization are discussed.

  12. Epstein-Barr Virus Fusion with Epithelial Cells Triggered by gB Is Restricted by a gL Glycosylation Site. (United States)

    Möhl, Britta S; Chen, Jia; Park, Seo Jin; Jardetzky, Theodore S; Longnecker, Richard


    Epstein-Barr virus (EBV) entry into epithelial cells is mediated by the conserved core fusion machinery, composed of the fusogen gB and the receptor-binding complex gH/gL. The heterodimeric gH/gL complex binds to the EBV epithelial cell receptor or gp42, which binds to the B-cell receptor, triggering gB-mediated fusion of the virion envelope with cellular membranes. Our previous study found that the gL glycosylation mutant N69L/S71V had an epithelial cell-specific hyperfusogenic phenotype. To study the influence of this gL mutant on the initiation and kinetics of gB-driven epithelial cell fusion, we established a virus-free split-green fluorescent protein cell-cell fusion assay that enables real-time measurements of membrane fusion using live cells. The gL_N69L/S71V mutant had a large increase in epithelial cell fusion activity of up to 300% greater than that of wild-type gL starting at early time points. The hyperfusogenicity of the gL mutant was not a result of alterations in complex formation with gH or alterations in cellular localization. Moreover, the hyperfusogenic phenotype of the gL mutant correlated with the formation of enlarged syncytia. In summary, our present findings highlight an important role of gL in the kinetics of gB-mediated epithelial cell fusion, adding to previous findings indicating a direct interaction between gL and gB in EBV membrane fusion.IMPORTANCE EBV predominantly infects epithelial cells and B lymphocytes, which are the cells of origin for the EBV-associated malignancies Hodgkin and Burkitt lymphoma as well as nasopharyngeal carcinoma. Contrary to the other key players of the core fusion machinery, gL has the most elusive role during EBV-induced membrane fusion. We found that the glycosylation site N69/S71 of gL is involved in restricting epithelial cell fusion activity, strongly correlating with syncytium size. Interestingly, our data showed that the gL glycosylation mutant increases the fusion activity of the hyperfusogenic g

  13. Antimicrobial GL13K peptide coatings killed and ruptured the wall of Streptococcus gordonii and prevented formation and growth of biofilms.

    Directory of Open Access Journals (Sweden)

    Xi Chen

    Full Text Available Infection is one of the most prevalent causes for dental implant failure. We have developed a novel antimicrobial peptide coating on titanium by immobilizing the antimicrobial peptide GL13K. GL13K was developed from the human salivary protein BPIFA2. The peptide exhibited MIC of 8 µg/ml against planktonic Pseudonomas aeruginosa and their biofilms were reduced by three orders of magnitude with 100 µg/ml GL13K. This peptide concentration also killed 100% of Streptococcus gordonii. At 1 mg/ml, GL13K caused less than 10% lysis of human red blood cells, suggesting low toxicity to mammalian cells. Our GL13K coating has also previously showed bactericidal effect and inhibition of biofilm growth against peri-implantitis related pathogens, such as Porphyromonas gingivalis. The GL13K coating was cytocompatible with human fibroblasts and osteoblasts. However, the bioactivity of antimicrobial coatings has been commonly tested under (quasistatic culture conditions that are far from simulating conditions for biofilm formation and growth in the oral cavity. Oral salivary flow over a coating is persistent, applies continuous shear forces, and supplies sustained nutrition to bacteria. This accelerates bacteria metabolism and biofilm growth. In this work, the antimicrobial effect of the coating was tested against Streptococcus gordonii, a primary colonizer that provides attachment for the biofilm accretion by P. gingivalis, using a drip-flow biofilm bioreactor with media flow rates simulating salivary flow. The GL13K peptide coatings killed bacteria and prevented formation and growth of S. gordonii biofilms in the drip-flow bioreactor and under regular mild-agitation conditions. Surprisingly the interaction of the bacteria with the GL13K peptide coatings ruptured the cell wall at their septum or polar areas leaving empty shell-like structures or exposed protoplasts. The cell wall rupture was not detected under regular culture conditions, suggesting that cell

  14. [Medical implantable devices and electromagnetic compatibility]. (United States)

    Andrivet, P


    Continuing progress in medicine has led to a corresponding population growth among the elderly population resulting in an increase in the number of patients with active implanted medical devices. At the same time, there continues to be a proliferation of electromagnetic wave sources within our technological environment. The coexistence of implanted active medical devices and environmental electromagnetic waves requires particular attention in order to avoid electromagnetic interference. For this reason, experts are more and more involved in writing specific manufacturing standards.

  15. Wireless Phones Electromagnetic Field Radiation Exposure Assessment


    A. D. Usman; W. F.W. Ahmad; M. Z.A.A. Kadir; M. Mokhtar


    Problem statement: Inadequate knowledge of electromagnetic field emitted by mobile phones and increased usage at close proximity, created a lot of skepticism and speculations among end users on its safety or otherwise. Approach: In this study, near field electromagnetic field radiation measurements were conducted on different brand of mobile phones in active mode using a tri-axis isotropic probe and electric field meter. Results: The highest electromagnetic field exposure was recorded when th...

  16. Scattering of light and other electromagnetic radiation

    CERN Document Server

    Kerker, Milton


    The Scattering of Light and Other Electromagnetic Radiation discusses the theory of electromagnetic scattering and describes some practical applications. The book reviews electromagnetic waves, optics, the interrelationships of main physical quantities and the physical concepts of optics, including Maxwell's equations, polarization, geometrical optics, interference, and diffraction. The text explains the Rayleigh2 theory of scattering by small dielectric spheres, the Bessel functions, and the Legendre functions. The author also explains how the scattering functions for a homogenous sphere chan

  17. Anisotropic conducting films for electromagnetic radiation applications (United States)

    Cavallo, Francesca; Lagally, Max G.; Rojas-Delgado, Richard


    Electronic devices for the generation of electromagnetic radiation are provided. Also provided are methods for using the devices to generate electromagnetic radiation. The radiation sources include an anisotropic electrically conducting thin film that is characterized by a periodically varying charge carrier mobility in the plane of the film. The periodic variation in carrier mobility gives rise to a spatially varying electric field, which produces electromagnetic radiation as charged particles pass through the film.

  18. The finite element method in electromagnetics

    CERN Document Server

    Jin, Jianming


    A new edition of the leading textbook on the finite element method, incorporating major advancements and further applications in the field of electromagnetics The finite element method (FEM) is a powerful simulation technique used to solve boundary-value problems in a variety of engineering circumstances. It has been widely used for analysis of electromagnetic fields in antennas, radar scattering, RF and microwave engineering, high-speed/high-frequency circuits, wireless communication, electromagnetic compatibility, photonics, remote sensing, biomedical engineering, and space exploration. The

  19. Advanced computational electromagnetic methods and applications

    CERN Document Server

    Li, Wenxing; Elsherbeni, Atef; Rahmat-Samii, Yahya


    This new resource covers the latest developments in computational electromagnetic methods, with emphasis on cutting-edge applications. This book is designed to extend existing literature to the latest development in computational electromagnetic methods, which are of interest to readers in both academic and industrial areas. The topics include advanced techniques in MoM, FEM and FDTD, spectral domain method, GPU and Phi hardware acceleration, metamaterials, frequency and time domain integral equations, and statistics methods in bio-electromagnetics.

  20. Electromagnetic wave analogue of electronic diode


    Shadrivov, Ilya V.; Powell, David A.; Kivshar, Yuri S.; Fedotov, Vassili A.; Zheludev, Nikolay I.


    An electronic diode is a nonlinear semiconductor circuit component that allows conduction of electrical current in one direction only. A component with similar functionality for electromagnetic waves, an electromagnetic isolator, is based on the Faraday effect of the polarization state rotation and is also a key component of optical and microwave systems. Here we demonstrate a chiral electromagnetic diode, which is a direct analogue of an electronic diode: its functionality is underpinned by ...

  1. Homology in Electromagnetic Boundary Value Problems

    Directory of Open Access Journals (Sweden)

    Pellikka Matti


    Full Text Available We discuss how homology computation can be exploited in computational electromagnetism. We represent various cellular mesh reduction techniques, which enable the computation of generators of homology spaces in an acceptable time. Furthermore, we show how the generators can be used for setting up and analysis of an electromagnetic boundary value problem. The aim is to provide a rationale for homology computation in electromagnetic modeling software.

  2. A dioxin response element in the multiple cloning site of the pGL3 luciferase reporter influences transcriptional activity1 (United States)

    Ochs, Sharon; Liu, Jing; Fernando, Tharu; Fecher, Roger; Sulentic, Courtney E.W.


    Luciferase reporter plasmids (pGL3 backbone, Promega) have been utilized to characterize the transcriptional effects of the environmental contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and other aryl hydrocarbon receptor (AhR) ligands. Following ligand activation, the AhR and its dimerization partner AhR nuclear translocator (ARNT) regulate transcription by binding dioxin response elements (DREs) in regulatory regions of dioxin-sensitive genes. Upon sequencing of our luciferase reporters, we unexpectedly identified a DRE core motif within the multiple cloning site (mcsDRE) of the pGL3 luciferase plasmid backbone in a subset of our reporters. Therefore, the objective of this study was to determine if the mcsDRE inadvertently influences reporter activity. Utilizing deletional analysis we determined that the mcsDRE did significantly alter the transcriptional effect induced by TCDD. Since many chemicals have been shown to interact with the AhR and influence transcription through the DRE, the presence of the mcsDRE in the pGL3 luciferase plasmid may inappropriately influence promoter and enhancer analysis. As such, insertion of regulatory elements into pGL3 reporters should be designed to avoid retaining the mcsDRE core motif (GCGTG) and currently utilized pGL3 reporters should be evaluated for the presence of the mcsDRE. PMID:22652426

  3. Numerical computation of electromagnetic field for general static and axisymmetric current distribution (United States)

    Fukushima, Toshio


    We developed a numerical method to compute the electromagnetic field of arbitrary static and axisymmetric current distribution. The method (i) numerically evaluates a double integral of the electrostatic and magnetostatic potentials of an infinitely thin ring current by the split quadrature method using the double exponential rules, and (ii) derives the electrostatic field and the magnetostatic induction by numerically differentiating the numerically integrated potentials by the central difference formula. A comparison with the exact solution for a poloidal current distribution with an anisotropic Gaussian damping confirmed the 14- and 9-digit accuracy of the potential and the field/induction computed by the new method.

  4. Integral methods in low-frequency electromagnetics

    CERN Document Server

    Solin, Pavel; Karban, Pavel; Ulrych, Bohus


    A modern presentation of integral methods in low-frequency electromagnetics This book provides state-of-the-art knowledge on integral methods in low-frequency electromagnetics. Blending theory with numerous examples, it introduces key aspects of the integral methods used in engineering as a powerful alternative to PDE-based models. Readers will get complete coverage of: The electromagnetic field and its basic characteristics An overview of solution methods Solutions of electromagnetic fields by integral expressions Integral and integrodifferential methods

  5. Electromagnetic Compatibility for the Space Shuttle (United States)

    Scully, Robert C.


    This slide presentation reviews the Space Shuttle electromagnetic compatibility (EMC). It includes an overview of the design of the shuttle with the areas that are of concern for the electromagnetic compatibility. It includes discussion of classical electromagnetic interference (EMI) and the work performed to control the electromagnetic interference. Another area of interest is electrostatic charging and the threat of electrostatic discharge and the attempts to reduce damage to the Shuttle from these possible hazards. The issue of electrical bonding is als reviewed. Lastly the presentation reviews the work performed to protect the shuttle from lightning, both in flight and on the ground.

  6. Electromagnetic Theory for Microwaves and Optoelectronics

    CERN Document Server

    Zhang, Keqian


    This book is a first year graduate text on electromagnetic fields and waves. At the same time it serves as a useful reference for researchers and engineers in the areas of microwaves and optoelectronics. Following the presentation of the physical and mathematical foundations of electromagnetic theory, the book discusses the field analysis of electromagnetic waves confined in material boundaries, or so-called guided waves, electromagnetic waves in the dispersive media and anisotropic media, Gaussian beams and scalar diffraction theory. The theories and methods presented in the book are foundations of wireless engineering, microwave and millimeter wave techniques, optoelectronics and optical fiber communication.

  7. Parallel QR Decomposition for Electromagnetic Scattering Problems

    National Research Council Canada - National Science Library

    Boleng, Jeff


    This report introduces a new parallel QR decomposition algorithm. Test results are presented for several problem sizes, numbers of processors, and data from the electromagnetic scattering problem domain...

  8. Visualization Of Electromagnetic Environment Near GSM Antennae (United States)

    Zvezdina, M. Yu; Shokova, Yu A.; Kundryukova, N. I.; Kutukova, V. D.; Pozdnyakova, A. V.


    Web-enabled mobile phone enhancement has determined a sharp increase of mobile base station quantity, which has led to a surge of electromagnetic noise in metropolitan areas. Electromagnetic noise permanently influences adult and child population; the impossibility to remove this impact has promoted the electromagnetic monitoring. The most accessible form of socially oriented monitoring is a visualization of energy flux density for GSM base station antennae. Forecast calculation routines take antenna construction and location into an account; they also allow giving the recommendations on electromagnetic environment improvement basing on physical interpretation the obtained results.

  9. Electromagnetic Radiation Interface System and Method

    National Research Council Canada - National Science Library

    Steinbrecher, Donald H


    .... The termination section may comprise an electrical resistance for capturing substantially all the electromagnetic wave energy received by each respective bristle to thereby prevent reflections...

  10. Electromagnetic perturbations in new brane world scenarios (United States)

    Molina, C.; Pavan, A. B.; Medina Torrejón, T. E.


    In this work, we consider electromagnetic dynamics in Randall-Sundrum branes. It is derived from a family of four-dimensional spacetimes compatible with Randall-Sundrum brane worlds, focusing on asymptotic flat backgrounds. Maximal extensions of the solutions are constructed, and their causal structures are discussed. These spacetimes include singular, nonsingular, and extreme black holes. Maxwell's electromagnetic field is introduced, and its evolution is studied in an extensive numerical survey. Electromagnetic quasinormal mode spectra are derived and analyzed with time-dependent and high-order WKB methods. Our results indicate that the black holes in the brane are electromagnetically stable.

  11. A resonant electromagnetic vibration energy harvester for intelligent wireless sensor systems

    Energy Technology Data Exchange (ETDEWEB)

    Qiu, Jing, E-mail:; Wen, Yumei; Li, Ping; Liu, Xin; Chen, Hengjia; Yang, Jin [Sensors and Instruments Research Center, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044 (China)


    Vibration energy harvesting is now receiving more interest as a means for powering intelligent wireless sensor systems. In this paper, a resonant electromagnetic vibration energy harvester (VEH) employing double cantilever to convert low-frequency vibration energy into electrical energy is presented. The VEH is made up of two cantilever beams, a coil, and magnetic circuits. The electric output performances of the proposed electromagnetic VEH have been investigated. With the enhancement of turns number N, the optimum peak power of electromagnetic VEH increases sharply and the resonance frequency deceases gradually. When the vibration acceleration is 0.5 g, we obtain the optimum output voltage and power of 9.04 V and 50.8 mW at frequency of 14.9 Hz, respectively. In a word, the prototype device was successfully developed and the experimental results exhibit a great enhancement in the output power and bandwidth compared with other traditional electromagnetic VEHs. Remarkably, the proposed resonant electromagnetic VEH have great potential for applying in intelligent wireless sensor systems.

  12. Electromagnetic imaging and simulated annealing (United States)

    Gibert, Dominique; Virieux, Jean


    In contrast with acoustical imaging methods, for which the wave field is dominated by propagation effects, electromagnetic imaging of conductive media suffers from the diffusive behavior of the electromagnetic field. An important question to address when working toward the achievement of electromagnetic imaging concerns the possibility of resolving the diffusion damping. Exact inversion will be looking at the solvability of the integral equation relating a diffusive field to its dual wavefield. This equation is ill posed because its Laplace-like kernel makes the inverse problem of finding the dual wave field a notoriously difficult (both numerically and mathematically) one. Stochastic inversion is another alternative based on least squares fitting. In this inverse problem approach, extracting the wave field is still a relatively instable process, although the L2 misfit function for data without noise presents a global minimum. The simulated annealing overcomes this instability for parameterization of this problem designed as follows. The unknown wave field is expected to be a sequence of impulsive functions. The number of impulsive functions can be determined by using a statistical criterion, called AIC, which comes from the Prony technique. The simulated annealing is applied to the positions of the reflections, while the amplitudes, which are not taken as parameters, are obtained by linear fitting. The simulated annealing method proves to be efficient even in the presence of noise. Furthermore, this nonlinear numerical inversion furnishes statistical quantities which allows an estimation of the resolution. Simple synthetic examples illustrate the performance of the inversion, while a synthetic finite element example shows the final pseudo-seismic section to be processed by standard seismic migration techniques.

  13. Electromagnetic effects on transportation systems

    Energy Technology Data Exchange (ETDEWEB)

    Morris, M.E.; Dinallo, M.A.


    Electronic and electrical system protection design can be used to eliminate deleterious effects from lightning, electromagnetic interference, and electrostatic discharges. Evaluation of conventional lightning protection systems using advanced computational modeling in conjunction with rocket-triggered lightning tests suggests that currently used lightning protection system design rules are inadequate and that significant improvements in best practices used for electronic and electrical system protection designs are possible. A case study of lightning induced upset and failure of a railway signal and control system is sketched.

  14. The CLAS forward electromagnetic calorimeter

    CERN Document Server

    Amarian, M; Beard, K; Brooks, W; Burkert, V; Carstens, T; Coleman, A; Demirchyan, R; Efremenko, Yu V; Egiyan, H; Egiyan, K; Funsten, H; Gavrilov, V; Giovanetti, K; Marshall, R M; Mecking, B; Minehart, R C; Mkrtchan, H; Ohandjanyan, M; Sharabyan, Yu G; Smith, L C; Stepanyan, S; Stephens, W A; Tung, T Y; Zorn, C


    The CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab utilizes six iron-free superconducting coils to provide an approximately toroidal magnetic field. The six sectors are instrumented individually to form six independent spectrometers. The forward region (8 deg. < 45 deg.) of each sector is equipped with a lead-scintillator electromagnetic sampling calorimeter (EC), 16 radiation lengths thick, using a novel triangular geometry with stereo readout. With its good energy and position resolution, the EC is used to provide the primary electron trigger for CLAS. It is also used to reject pions, reconstruct pi deg. and eta decays and detect neutrons. This paper treats the design, construction and performance of the calorimeter.

  15. Electromagnetic fields in fractal continua

    Energy Technology Data Exchange (ETDEWEB)

    Balankin, Alexander S., E-mail: [Grupo “Mecánica Fractal”, Instituto Politécnico Nacional, México D.F., 07738 Mexico (Mexico); Mena, Baltasar [Instituto de Ingeniería, Universidad Nacional Autónoma de México, México D.F. (Mexico); Patiño, Julián [Grupo “Mecánica Fractal”, Instituto Politécnico Nacional, México D.F., 07738 Mexico (Mexico); Morales, Daniel [Instituto Mexicano del Petróleo, México D.F., 07730 Mexico (Mexico)


    Fractal continuum electrodynamics is developed on the basis of a model of three-dimensional continuum Φ{sub D}{sup 3}⊂E{sup 3} with a fractal metric. The generalized forms of Maxwell equations are derived employing the local fractional vector calculus related to the Hausdorff derivative. The difference between the fractal continuum electrodynamics based on the fractal metric of continua with Euclidean topology and the electrodynamics in fractional space F{sup α} accounting the fractal topology of continuum with the Euclidean metric is outlined. Some electromagnetic phenomena in fractal media associated with their fractal time and space metrics are discussed.

  16. Plasma scattering of electromagnetic radiation

    CERN Document Server

    Sheffield, John


    Plasma Scattering of Electromagnetic Radiation covers the theory and experimental application of plasma scattering. The book discusses the basic properties of a plasma and of the interaction of radiation with a plasma; the relationship between the scattered power spectrum and the fluctuations in plasma density; and the incoherent scattering of low-temperature plasma. The text also describes the constraints and problems that arise in the application of scattering as a diagnostic technique; the characteristic performance of various dispersion elements, image dissectors, and detectors; and the ge

  17. 2008+ solved problems in electromagnetics

    CERN Document Server

    Nasar, Syed


    SciTech Publishing is reissuing this extremely valuable learning resource, originally published in 1992 in the Schaum's Problem-Solving Series for students of electromagnetics and those who wish to refresh and solidify their understanding of its challenging applications. Problem-solving drill helps develop confidence, but few textbooks offer the answers, never mind the complete solutions, to their chapter exercises. Here noted author Professor Syed Nasar has divided the book's problems into topic areas similar to a textbook and presented a wide array of problems, followed immediately by their

  18. Electromagnetic fields, environment and health

    CERN Document Server

    Perrin, Anne


    A good number of false ideas are circulating on the effects of non-ionizing radiations on our health, which can lead to an oversimplification of the issue, to potentially dangerous misconceptions or to misleading data analysis. Health effects may be exaggerated, or on the contrary underplayed. The authors of this work (doctors, engineers and researchers) have endeavored to supply validated and easily understandable scientific information on the electromagnetic fields and their biological and health effects. After a general review of the physics of the waves and a presentation of non-ionizing r

  19. Continuum mechanics of electromagnetic solids

    CERN Document Server

    Maugin, GA


    This volume is a rigorous cross-disciplinary theoretical treatment of electromechanical and magnetomechanical interactions in elastic solids. Using the modern style of continuum thermomechanics (but without excessive formalism) it starts from basic principles of mechanics and electromagnetism, and goes on to unify these two fields in a common framework. It treats linear and nonlinear static and dynamic problems in a variety of elastic solids such as piezoelectrics, electricity conductors, ferromagnets, ferroelectrics, ionic crystals and ceramics. Chapters 1-3 are introductory, describing the e

  20. Análise histoquímica das glândulas anexas do aparelho reprodutor do macho de paca (Cuniculus paca)


    Aretuza C. Capalbo; Claudinei Cruz; Fabrício S. Oliveira; Sasahara,Tais H.C.; Leonardo M. Leal; LUCIANA S. SIMÕES; Miglino, Maria A; Machado, Márcia R.F.


    RESUMO: A paca (Cuniculus paca) é um roedor típico de regiões tropicais. Com a finalidade de estudar esta espécie selvagem para manejo adequado e sua preservação, objetivou-se neste trabalho caracterizar a histoquímica das glândulas anexas do trato reprodutor do macho da paca. Para este fim, cortes histológicos dessas glândulas foram submetidas às reações histoquímicas com Ácido Periódico de Schiff (PAS), Alcian blue (AB), PAS. + AB. e PAS + Amilase. Na glândula bulbouretral foi constatado qu...

  1. The muscle-specific protein phosphatase PP1G/R(GL)(G(M))is essential for activation of glycogen synthase by exercise

    DEFF Research Database (Denmark)

    Aschenbach, W G; Suzuki, Y; Breeden, K


    that was originally postulated to mediate insulin control of glycogen metabolism. However, we recently showed (Suzuki, Y., Lanner, C., Kim, J.-H., Vilardo, P. G., Zhang, H., Jie Yang, J., Cooper, L. D., Steele, M., Kennedy, A., Bock, C., Scrimgeour, A., Lawrence, J. C. Jr., L., and DePaoli-Roach, A. A. (2001) Mol....... Cell. Biol. 21, 2683-2694) that insulin activates GS in muscle of R(GL)(G(M)) knockout (KO) mice similarly to the wild type (WT). To determine whether PP1G is involved in glycogen metabolism during muscle contractions, R(GL) KO and overexpressors (OE) were subjected to two models of contraction...... of glycogen metabolism under basal conditions and in response to contractile activity, and may explain the reduced muscle glycogen content in the R(GL) KO mice, despite the normal insulin activation of GS....

  2. Efeitos do som basal em fendas glóticas Effects of vocal fry incomplete glottal closure

    Directory of Open Access Journals (Sweden)

    Geovana de Paula Bolzan


    Full Text Available TEMA: som basal em fendas glóticas. PROCEDIMENTOS: participaram desta pesquisa dois sujeitos do sexo feminino, com idades entre 20 e 40 anos e diagnóstico otorrinolaringológico de fenda em ampulheta. Houve gravação da emissão sustentada da vogal /a/ e exame videolaringoestroboscópico, imediatamente a seguir, os sujeitos realizaram o som basal em três séries de 15 repetições, e foram submetidos a novo exame laríngeo e gravação da vogal. Os dados pré e pós-realização do som basal foram submetidos às analises acústica, perceptivo-auditiva e videolaringoestroboscópica, realizadas por juízes (três fonoaudiólogas e três otorrinolaringologistas, respectivamente. RESULTADOS: em ambos os sujeitos, houve melhora no fechamento glótico e amplitude de vibração da mucosa das pregas vocais; piora no tipo de voz; aumento das medidas de ruído e de Jitter. CONCLUSÃO: o som basal promoveu redução das fendas glóticas e aumento da amplitude de vibração da mucosa das pregas vocais; piora do tipo de voz, que ficou mais ruidoso; aumento das medidas de ruído e de Jitter, sugerindo irregularidade vibratória, provavelmente devido ao efeito do ajuste do som basal ao mobilizar intensamente a mucosa.BACKGROUND: vocal fry in incomplete glottal closure. PROCEDURE: two individuals aged between 20 and 40 years old presenting an otolaryngological diagnosis of ampoule chink were part of the study. A recording of the sustained emission of /a/ vowel took place, as well as a videostroboscopic examination. Right after, the individuals completed the vocal fry in three series of 15 repetitions, being submitted to a new laryngeal examination and to the vowel’s recording. Both pre-vocal and post vocal fry data were assessed through acoustic, perceptive-auditive and videostroboscopic analysis, carried out by judges (three speech and language pathologists and three otolaryngologists, respectively. RESULTS: for both individuals, there was an improvement

  3. Electromagnets 1: Turn on the Power. Science in a Box. (United States)

    Whitman, Betsy Blizard


    The article presents inexpensive activities to teach elementary school students about electromagnets. Students learn to make an electromagnet with a battery, nail, and wire, then different activities help them explore the difference between permanent magnets and electromagnets. (SM)

  4. Antibacterial activity and cytocompatibility of an implant coating consisting of TiO2 nanotubes combined with a GL13K antimicrobial peptide. (United States)

    Li, Tao; Wang, Na; Chen, Su; Lu, Ran; Li, Hongyi; Zhang, Zhenting


    Prevention of implant-associated infections at an early stage of surgery is highly desirable for the long-term efficacy of implants in dentistry and orthopedics. Infection prophylaxis using conventional antibiotics is becoming less effective due to the development of bacteria resistant to multiple antibiotics. An ideal strategy to conquer bacterial infections is the local delivery of antibacterial agents. Therefore, antimicrobial peptide (AMP) eluting coatings on implant surfaces is a promising alternative. In this study, the feasibility of utilizing TiO2 nanotubes (TNTs), processed using anodization, as carriers to deliver a candidate AMP on titanium surfaces for the prevention of implant-associated infections is assessed. The broad-spectrum GL13K (GKIIKLKASLKLL-CONH2) AMP derived from human parotid secretory protein was selected and immobilized to TNTs using a simple soaking technique. Field emission scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and liquid chromatography-mass spectrometry analyses confirmed the successful immobilization of GL13K to anatase TNTs. The drug-loaded coatings demonstrated a sustained and slow drug release profile in vitro and eradicated the growth of Fusobacterium nucleatum and Porphyromonas gingivalis within 5 days of culture, as assessed by disk-diffusion assay. The GL13K-immobilized TNT (GL13K-TNT) coating demonstrated greater biocompatibility, compared with a coating produced by incubating TNTs with equimolar concentrations of metronidazole. GL13K-TNTs produced no observable cytotoxicity to preosteoblastic cells (MC3T3-E1). The coating may also have an immune regulatory effect, in support of rapid osseointegration around implants. Therefore, the combination of TNTs and AMP GL13K may achieve simultaneous antimicrobial and osteoconductive activities.

  5. The double identity of linguistic doubling. (United States)

    Berent, Iris; Bat-El, Outi; Brentari, Diane; Dupuis, Amanda; Vaknin-Nusbaum, Vered


    Does knowledge of language consist of abstract principles, or is it fully embodied in the sensorimotor system? To address this question, we investigate the double identity of doubling (e.g., slaflaf, or generally, XX; where X stands for a phonological constituent). Across languages, doubling is known to elicit conflicting preferences at different levels of linguistic analysis (phonology vs. morphology). Here, we show that these preferences are active in the brains of individual speakers, and they are demonstrably distinct from sensorimotor pressures. We first demonstrate that doubling in novel English words elicits divergent percepts: Viewed as meaningless (phonological) forms, doubling is disliked (e.g., slaflaf Language, and their capacity to do so depends on the structure of their spoken language (English vs. Hebrew). These results demonstrate that linguistic preferences doubly dissociate from sensorimotor demands: A single stimulus can elicit diverse percepts, yet these percepts are invariant across stimulus modality--for speech and signs. These conclusions are in line with the possibility that some linguistic principles are abstract, and they apply broadly across language modality.

  6. Gene expression profiling in the lungs of pigs with different susceptibilities to Glässer's disease

    Directory of Open Access Journals (Sweden)

    Sargent Carole A


    Full Text Available Abstract Background Haemophilus parasuis is the causative agent of Glässer's disease in pigs. Currently, little is known about the molecular mechanisms that contribute to disease susceptibility. This study used a porcine oligonucleotide microarray to identify genes that were differentially expressed (DE in the lungs of colostrum-deprived animals previously characterized as being either 'Fully Resistant' (FR or 'Susceptible' to infection by H. parasuis in a bacterial challenge experiment. Results Gene expression profiles of 'FR' and 'Susceptible' animals were obtained by the identification of genes that were differentially expressed between each of these groups and mock-inoculated 'Control' animals. At 24 hours post-inoculation, a total of 21 and 58 DE genes were identified in 'FR' and 'Susceptible' animals respectively. At 72 hours, the numbers of genes were 20 and 347 respectively. 'FR' animals at 24 hours exhibited an increased expression of genes encoding extracellular matrix and TGF-β signalling components, possibly indicative of tissue repair following the successful early resolution of infection. The gene expression profile of 'FR' animals at 72 hours supported the hypothesis that higher levels of antibacterial activity were responsible for the 'FR' phenotype, possibly due to an increase in natural immunoglobulin A and decrease in signalling by the immunoregulatory transcription factor peroxisome proliferator-activated receptor gamma (PPAR-γ. The expression profile of 'Susceptible' animals at both time-points was characterized by an imbalance in signalling between pro and anti-inflammatory cytokines and an increased expression of genes involved in biological processes associated with inflammation. These include the pro-inflammatory cytokine genes resistin (RETN and interleukin 1-beta (IL1B. At 72 hours, a reduction in the expression of genes involved in antigen presentation by both MHC class I and II molecules was observed, which could

  7. Project Half Double

    DEFF Research Database (Denmark)

    Svejvig, Per; Ehlers, Michael; Adland, Karoline Thorp

    activities carried out within the framework of the projects. The formal part of Project Half Double was initiated in June 2015. We started out by developing, refining and testing the Half Double methodology on seven pilot projects in the first phase of the project, which will end June 2016. The current...... many of the key performance indicators associated with them can be evaluated (Grundfos and Siemens Wind Power). In addition to the current status of delivering impact faster for the seven pilot projects, it is important to highlight that Project Half Double phase 1 has planted many seeds in the pilot...... organisations concerning project methodology and beyond. The many learning points from each pilot project show that Project Half Double has left its clear footprint in the pilot organisations, and that the Half Double methodology has evolved and developed very much during Project Half Double phase 1....

  8. Análisis ultraestructural de membranas de glóbulos grasos lácteos de calostro y leche humana


    Hernández, Francisco; Akahori, Hiroshi


    Se describen ultraestructuralmente los glóbulos grasos lácteos y sus membranas, a partir de leche y calostro de origen humano. Al microscopio electrónico de barrido los glóbulos aparecen como estructuras esferoides con algunas irregularidades en su superficie. Al micriscopio electrónico de transmisión se ve que esas irregularidades están compuestas por islotes de un material morfológicamente similar al citoplasma, en el que aparecen estructuras similares a fragmentos de retículo endoplasmátic...

  9. Sialolitos en conductos y glándulas salivales: Revisión de literatura Sialoliths in ducts and salivary glands: Literature review


    M. Rebolledo Cobos; Z. Carbonell Muñoz; A. Díaz Caballero


    La sialolitiasis es una afección que se produce por la obstrucción de una glándula salival o de su conducto excretor por la formación de concreciones calcáreas o sialolitos en el parénquima de los mismos. Existen teorías que afirman que los sialolitos en las glándulas y conductos salivales son originados por la mineralización de varios componentes como: cuerpos extraños, detritus celulares y microorganismos, depositándose inicialmente una matriz orgánica, probablemente de glucoproteínas, para...

  10. Reanimación con glóbulos rojos Rh positivo y sin prueba cruzada en emergencias médicas.


    Armando Corté; Wilson Wedekin; Fabiola Bolaños


    INTRODUCCIÓN: Se presentan tres años de experiencia en el uso de concentrado de glóbulos rojos O Rh positivo sin cruzar para transfusión de emergencia en pacientes severamente lesionados e hipovolémicos en una clínica privada de Cali. MATERIALES Y MÉTODOS: La sangre se solicitó para pacientes con trauma, hemorragia intraoperatoria masiva inesperada, o ruptura de aneurisma. Los glóbulos rojos O Rh positivos es la primera elección para el soporte de pacientes que no pueden esperar sangre tipo ...

  11. The electromagnetic momentum of static charge-current distributions


    Franklin, Jerrold


    The origin of electromagnetic momentum for general static charge-current distributions is examined. The electromagnetic momentum for static electromagnetic fields is derived by implementing conservation of momentum for the sum of mechanical momentum and electromagnetic momentum. The external force required to keep matter at rest during the production of the final static configuration produces the electromagnetic momentum. Examples of the electromagnetic momentum in static electric and magneti...

  12. Double sequence core theorems

    Directory of Open Access Journals (Sweden)

    Richard F. Patterson


    Full Text Available In 1900, Pringsheim gave a definition of the convergence of double sequences. In this paper, that notion is extended by presenting definitions for the limit inferior and limit superior of double sequences. Also the core of a double sequence is defined. By using these definitions and the notion of regularity for 4-dimensional matrices, extensions, and variations of the Knopp Core theorem are proved.

  13. Electromagnetic probes of the QGP

    Directory of Open Access Journals (Sweden)

    Bratkovskaya E. L.


    Full Text Available We investigate the properties of the QCD matter across the deconfinement phase transition in the scope of the parton-hadron string dynamics (PHSD transport approach. We present here in particular the results on the electromagnetic radiation, i.e. photon and dilepton production, in relativistic heavy-ion collisions. By comparing our calculations for the heavy-ion collisions to the available data, we determine the relative importance of the various production sources and address the possible origin of the observed strong elliptic flow v2 of direct photons. We argue that the different centrality dependence of the hadronic and partonic sources for direct photon production in nucleusnucleus collisions can be employed to shed some more light on the origin of the photon v2 “puzzle”. While the dilepton spectra at low invariant mass show in-medium effects like an enhancement from multiple baryonic resonance formation or a collisional broadening of the vector meson spectral functions, the dilepton yield at high invariant masses (above 1.1 GeV is dominated by QGP contributions for central heavy-ion collisions at ultra-relativistic energies. This allows to have an independent view on the parton dynamics via their electromagnetic massive radiation.

  14. Compton Sources of Electromagnetic Radiation

    Energy Technology Data Exchange (ETDEWEB)

    Geoffrey Krafft,Gerd Priebe


    When a relativistic electron beam interacts with a high-field laser beam, intense and highly collimated electromagnetic radiation will be generated through Compton scattering. Through relativistic upshifting and the relativistic Doppler effect, highly energetic polarized photons are radiated along the electron beam motion when the electrons interact with the laser light. For example, X-ray radiation can be obtained when optical lasers are scattered from electrons of tens-of-MeV beam energy. Because of the desirable properties of the radiation produced, many groups around the world have been designing, building, and utilizing Compton sources for a wide variety of purposes. In this review article, we discuss the generation and properties of the scattered radiation, the types of Compton source devices that have been constructed to date, and the prospects of radiation sources of this general type. Due to the possibilities of producing hard electromagnetic radiation in a device that is small compared to the alternative storage ring sources, it is foreseen that large numbers of such sources may be constructed in the future.

  15. Flipping the Electromagnetic Theory classroom (United States)

    Berger, Andrew J.


    Electromagnetic Theory is a required junior-year course for Optics majors at the University of Rochester. This foundational course gives students their first rigorous exposure to electromagnetic vector fields, dipole radiation patterns, Fresnel reflection/transmission coefficients, waveguided modes, Jones vectors, waveplates, birefringence, and the Lorentz model of refractive index. To increase the percentage of class time devoted to student-centered conceptual reasoning and instructor feedback, this course was recently "flipped". Nearly all of the mathematically-intensive derivations were converted to narrated screencasts ("Khan Academy" style) and made available to students through the course's learning management system. On average, the students were assigned two 10-15 minute videos to watch in advance of each lecture. An electronic survey after each tutorial encouraged reflection and counted towards the student's participation grade. Over the past three years, students have consistently rated the videos as being highly valuable. This presentation will discuss the technical aspects of creating tutorial videos and the educational tradeoffs of flipping a mathematically-intensive upper-level course. The most important advantage is the instructor's increased ability to identify and respond to student confusion, via activities that would consume too much time in a lecture-centered course. Several examples of such activities will be given. Two pitfalls to avoid are the temptation for the instructor not to update the videos from year to year and the tendency of students not to take lecture notes while watching the videos.

  16. Millimeter waves: acoustic and electromagnetic. (United States)

    Ziskin, Marvin C


    This article is the presentation I gave at the D'Arsonval Award Ceremony on June 14, 2011 at the Bioelectromagnetics Society Annual Meeting in Halifax, Nova Scotia. It summarizes my research activities in acoustic and electromagnetic millimeter waves over the past 47 years. My earliest research involved acoustic millimeter waves, with a special interest in diagnostic ultrasound imaging and its safety. For the last 21 years my research expanded to include electromagnetic millimeter waves, with a special interest in the mechanisms underlying millimeter wave therapy. Millimeter wave therapy has been widely used in the former Soviet Union with great reported success for many diseases, but is virtually unknown to Western physicians. I and the very capable members of my laboratory were able to demonstrate that the local exposure of skin to low intensity millimeter waves caused the release of endogenous opioids, and the transport of these agents by blood flow to all parts of the body resulted in pain relief and other beneficial effects. Copyright © 2012 Wiley Periodicals, Inc.

  17. Transient electromagnetic sounding for groundwater (United States)

    Fitterman, David V.; Stewart, Mark T.


    The feasibility of using the transient electromagnetic sounding (TS or TDEM) method for groundwater exploration can be studied by means of numerical models. As examples of its applicability to groundwater exploration, we study four groundwater exploration problems: (1) mapping of alluvial fill and gravel zones over bedrock; (2) mapping of sand and gravel lenses in till; (3) detection of salt or brackish water interfaces in freshwater aquifers; and (4) determination of hydrostratigraphy. These groundwater problems require determination of the depth to bedrock; location of resistive, high‐porosity zones associated with fresh water; determination of formation resistivity to assess water quality; and determination of lithology and geometry, respectively. The TS method is best suited for locating conductive targets, and has very good vertical resolution. Unlike other sounding techniques where the receiver‐transmitter array must be expanded to sound more deeply, the depth of investigation for the TS method is a function of the length of time the transient is recorded. Present equipment limitations require that exploration targets with resistivities of 50 Ω ⋅ m or more be at least 50 m deep to determine their resistivity. The maximum depth of exploration is controlled by the geoelectrical section and background electromagnetic (EM) noise. For a particular exploration problem, numerical studies are recommended to determine if the target is detectable.

  18. Electromagnetic hypersensitivity: fact or fiction? (United States)

    Genuis, Stephen J; Lipp, Christopher T


    As the prevalence of wireless telecommunication escalates throughout the world, health professionals are faced with the challenge of patients who report symptoms they claim are connected with exposure to some frequencies of electromagnetic radiation (EMR). Some scientists and clinicians acknowledge the phenomenon of hypersensitivity to EMR resulting from common exposures such as wireless systems and electrical devices in the home or workplace; others suggest that electromagnetic hypersensitivity (EHS) is psychosomatic or fictitious. Various organizations including the World Health Organization as well as some nation states are carefully exploring this clinical phenomenon in order to better explain the rising prevalence of non-specific, multi-system, often debilitating symptoms associated with non-ionizing EMR exposure. As well as an assortment of physiological complaints, patients diagnosed with EHS also report profound social and personal challenges, impairing their ability to function normally in society. This paper offers a review of the sparse literature on this perplexing condition and a discussion of the controversy surrounding the legitimacy of the EHS diagnosis. Recommendations are provided to assist health professionals in caring for individuals complaining of EHS. Copyright © 2011 Elsevier B.V. All rights reserved.

  19. Electromagnetic Radiation Originating from Unstable Electron Oscillations

    DEFF Research Database (Denmark)

    Juul Rasmussen, Jens; Pécseli, Hans


    Electromagnetic oscillations in the range 300 – 700 MHz were observed from an unmagnetized argon discharge with an unstable electron velocity distribution function.......Electromagnetic oscillations in the range 300 – 700 MHz were observed from an unmagnetized argon discharge with an unstable electron velocity distribution function....

  20. [Mechanisms of electromagnetic radiation damaging male reproduction]. (United States)

    Xue, Lei; Chen, Hao-Yu; Wang, Shui-Ming


    More and more evidence from over 50 years of researches on the effects of electromagnetic radiation on male reproduction show that a certain dose of electromagnetic radiation obviously damages male reproduction, particularly the structure and function of spermatogenic cells. The mechanisms of the injury may be associated with energy dysmetabolism, lipid peroxidation, abnormal expressions of apoptosis-related genes and proteins, and DNA damage.

  1. Electromagnetic Energy Localization and Characterization of Composites (United States)


    Drewniak, and B. Archam- beault, “Numerical modeling of periodic composite media for electromagnetic shield - ing application,” 2007 IEEE Int. Symp. on...Electromagnetic Compatibility ( EMC 2007), July 9–13, 2007, pp. 1–5. [40] M. Luo, C. Liu, and H. P. Pan, “Numerical simulation on dielectric enhancement of

  2. High-Altitude Electromagnetic Pulse (HEMP) Testing (United States)


    Final 3. DATES COVERED (From - To) 4. TITLE AND SUBTITLE Test Operations Procedure (TOP) 01-2-620A High-Altitude Electromagnetic Pulse ( HEMP ...planning and execution of testing Army/DOD equipment to determine the effects of Horizontal Component High Altitude Electromagnetic Pulse ( HEMP ...5 2.3 HEMP Pre/Post Test Illuminations ..................................................... 7 3. REQUIRED TEST


    The reflection of electromagnetic waves normally incident on the wavefronts of a semi-infinite standing sound wave is discussed. By analogy with the...with the sound frequency. An experiment is described in which the Bragg reflection of 3 cm electromagnetic waves from a standing sound wave beneath a water surface is observed.

  4. Science 101: Can Electromagnetic Waves Affect Emotions? (United States)

    Robertson, Bill

    The answer to this month's question, "Can electromagnetic waves affect emotions," is yes. Wherever there are electromagnetic (EM) waves (basically everywhere!), there is the potential for them directly or indirectly to affect the emotions. But what about the likely motivation behind the originally-posed question? Can EM waves affect your…

  5. Statistical measurements of fast changing electromagnetic fields

    NARCIS (Netherlands)

    Serra, Ramiro; Serra, Ramiro; Leferink, Frank Bernardus Johannes


    The present works aims at describing important statistical indexes such as the field uniformity, the field inhomogeneity and the statistics near the cavity walls for a special case of fast changing random electromagnetic fields. We generate this kind of electromagnetic environment by means of a

  6. Electromagnetic transition between molecular resonances in Be

    Indian Academy of Sciences (India)


    Nov 4, 2014 ... A crucial test of this conjecture is the electromagnetic transition between the molecular resonances. This paper ... Electromagnetic properties and transitions present a crucial test for any model or the- ory. ... triple coincidence measurement is necessary to reduce the background problem which is particularly ...

  7. simulation of electromagnetic transients in power systems

    African Journals Online (AJOL)

    Dr Obe


    Sep 1, 1996 ... Electromagnetic (EM) transients produced by these mathematical models serve as a useful reference in the design of protective devices and fault locators. ... with simulated fault data from electromagnetic. (EM) transients calculation. .... problem in the frequency domain and, finally, taking the inverse Fourier ...

  8. Electromagnetic Radiation from QCD Matter: Theory Overview


    Shen, Chun


    Recent theory developments in electromagnetic radiation from relativistic heavy-ion collisions are reviewed. Electromagnetic observables can serve as a thermometer, a viscometer, and tomographic probes to the collision system. The current status of the "direct photon flow puzzle" is highlighted.

  9. Project Physics Tests 4, Light and Electromagnetism. (United States)

    Harvard Univ., Cambridge, MA. Harvard Project Physics.

    Test items relating to Project Physics Unit 4 are presented in this booklet. Included are 70 multiple-choice and 22 problem-and-essay questions. Concepts of light and electromagnetism are examined on charges, reflection, electrostatic forces, electric potential, speed of light, electromagnetic waves and radiations, Oersted's and Faraday's work,…


    Young, J.N.


    An electromagnetic device for moving an object in a linear path by increments is described. The device is specifically adapted for moving a neutron absorbing control rod into and out of the core of a reactor and consists essentially of an extension member made of magnetic material connected to one end of the control rod and mechanically flexible to grip the walls of a sleeve member when flexed, a magnetic sleeve member coaxial with and slidable between limit stops along the flexible extension, electromagnetic coils substantially centrally located with respect to the flexible extension to flex the extension member into gripping engagement with the sleeve member when ener gized, moving electromagnets at each end of the sleeve to attract the sleeve when energized, and a second gripping electromagnet positioned along the flexible extension at a distance from the previously mentioned electromagnets for gripping the extension member when energized. In use, the second gripping electromagnet is deenergized, the first gripping electromagnet is energized to fix the extension member in the sleeve, and one of the moving electromagnets is energized to attract the sleeve member toward it, thereby moving the control rod.

  11. International Conference on Microelectronics, Electromagnetics and Telecommunications

    CERN Document Server

    Rao, N; Kumar, S; Raj, C; Rao, V; Sarma, G


    This volume contains 73 papers presented at ICMEET 2015: International Conference on Microelectronics, Electromagnetics and Telecommunications. The conference was held during 18 – 19 December, 2015 at Department of Electronics and Communication Engineering, GITAM Institute of Technology, GITAM University, Visakhapatnam, INDIA. This volume contains papers mainly focused on Antennas, Electromagnetics, Telecommunication Engineering and Low Power VLSI Design.

  12. CALICE silicon–tungsten electromagnetic calorimeter

    Indian Academy of Sciences (India)

    paradigm', to be successful optimal interplay between hardware, i.e. granularity, and software, i.e. reconstruction algorithms is required. CALICE plans include studies of both electromagnetic and hadronic calorime- ter prototypes. The electromagnetic prototype is a sampling calorimeter with W absorber and Si pads as ...

  13. Ultimate Energy Densities for Electromagnetic Pulses


    Tsang, Mankei


    The ultimate electric and magnetic energy densities that can be attained by bandlimited electromagnetic pulses in free space are calculated using an ab initio quantized treatment, and the quantum states of electromagnetic fields that achieve the ultimate energy densities are derived. The ultimate energy densities also provide an experimentally accessible metric for the degree of localization of polychromatic photons.

  14. Dynamic evolution of double five-level atom interacting with one ...

    Indian Academy of Sciences (India)

    N H Abdel-Wahab


    Nov 23, 2017 ... Abstract. In this paper, the model describing a double five-level atom interacting with a single mode electromagnetic cavity field in the (off) non-resonate case is studied. We obtained the constants of motion for the considered model. Also, the state vector of the wave function is given by using the ...

  15. Optimization and inverse problems in electromagnetism

    CERN Document Server

    Wiak, Sławomir


    From 12 to 14 September 2002, the Academy of Humanities and Economics (AHE) hosted the workshop "Optimization and Inverse Problems in Electromagnetism". After this bi-annual event, a large number of papers were assembled and combined in this book. During the workshop recent developments and applications in optimization and inverse methodologies for electromagnetic fields were discussed. The contributions selected for the present volume cover a wide spectrum of inverse and optimal electromagnetic methodologies, ranging from theoretical to practical applications. A number of new optimal and inverse methodologies were proposed. There are contributions related to dedicated software. Optimization and Inverse Problems in Electromagnetism consists of three thematic chapters, covering: -General papers (survey of specific aspects of optimization and inverse problems in electromagnetism), -Methodologies, -Industrial Applications. The book can be useful to students of electrical and electronics engineering, computer sci...

  16. Electromagnetic Interference on Large Wind Turbines

    Directory of Open Access Journals (Sweden)

    Florian Krug


    Full Text Available Electromagnetic interference (EMI can both affect and be transmitted by mega-watt wind turbines. This paper provides a general overview on EMI with respect to mega-watt wind turbines. Possibilities of measuring all types of electromagnetic interference are shown. Electromagnetic fields resulting from a GSM transmitter mounted on a mega-watt wind turbine will be analyzed in detail. This cellular system operates as a real-time communication link. The method-of-moments is used to analytically describe the electro-magnetic fields. The electromagnetic interference will be analyzed under the given boundary condition with a commercial simulation tool. Different transmitter positions are judged on the basis of their radiation patterns. The principal EMI mechanisms are described and taken into consideration.

  17. The energy blockers bromopyruvate and lonidamine lead GL15 glioblastoma cells to death by different p53-dependent routes. (United States)

    Davidescu, Magdalena; Macchioni, Lara; Scaramozzino, Gaetano; Cristina Marchetti, Maria; Migliorati, Graziella; Vitale, Rita; Corcelli, Angela; Roberti, Rita; Castigli, Emilia; Corazzi, Lanfranco


    The energy metabolism of tumor cells relies on aerobic glycolysis rather than mitochondrial oxidation. This difference between normal and cancer cells provides a biochemical basis for new therapeutic strategies aimed to block the energy power plants of cells. The effects produced by the energy blockers bromopyruvate (3BP) and lonidamine (LND) and the underlying biochemical mechanisms were investigated in GL15 glioblastoma cells. 3BP exerts early effects compared to LND, even though both drugs lead cells to death but by different routes. A dramatic decrease of ATP levels occurred after 1 hour treatment with 3BP, followed by cytochrome c and hexokinase II degradation, and by the decrease of both LC3I/LC3II ratio and p62, markers of an autophagic flux. In addition, Akt(Ser(473)) and p53(Ser(15)/Ser(315)) dephosphorylation occurred. In LND treatment, sustained ATP cellular levels were maintained up to 40 hours. The autophagic response of cells was overcome by apoptosis that was preceded by phosphatidylinositol disappearance and pAkt decrease. This last event favored p53 translocation to mitochondria triggering a p53-dependent apoptotic route, as observed at 48 and 72 hours. Adversely, in 3BP treatment, phospho-p53 dephosphorylation targeted p53 to MDM2-dependent proteolysis, thus channeling cells to irreversible autophagy.

  18. Tumores de glándulas salivales: Su comportamiento en 10 años de trabajo (1993-2002

    Directory of Open Access Journals (Sweden)

    Oscar García-Roco Pérez


    Full Text Available Se realizó un estudio descriptivo de 107 pacientes que fueron intervenidos quirúrgicamente debido a afecciones en glándulas salivales, durante un período de 10 años, en el Servicio de Cirugía Maxilofacial del Hospital Provincial Docente "Manuel Ascunce Domenech" de Camagüey, con el propósito de describir su frecuencia según edad y sexo, comportamiento biológico, localización anatómica y resultado histopatológico. Hubo predominio de las condiciones neoplásicas benignas en la parótida, mientras que en la submandibular se manifestaron con mayor frecuencia los procesos malignos. El adenoma pleomorfo fue el tumor más frecuente entre las neoplasias benignas y el carcinoma mucoepidermoide, el más común entre las malignas.A descriptive study of 107 patients, who had been surgically treated from salivary gland tumors in the Maxillofacial Surgery Department of "Manuel Ascunce Domenech" provincial teaching hospital located in Camagüey during 10 years, was performed to describe the sex and age distribution and frequency of these tumors, their biological behavior, anatomical location and histopathological outcome. It was observed that benign neoplasias predominated in the parotid glands whereas malignant processes developed more often in submandibular glands. Pleomorphic adenoma was the most found tumor among the benign neoplasias and mucoepidermoid carcinoma was the commonest among the malignant processes.

  19. Pollen grains in quaternary sediments from the Campos Basin, state of Rio de Janeiro, Brazil: Core BU-91-GL-05

    Directory of Open Access Journals (Sweden)

    Aline Gonçalves de Freitas


    Full Text Available Here, we describe pollen grains extracted from a Pleistocene-Holocene sediment core (BU-91-GL-05; 22°48'45"S; 41°54'13"W taken from the Albacora Slope (22°48'45"S; 41°54'13"W, located in the Campos Basin of the northern region of the state of Rio de Janeiro, Brazil. The analysis resulted in the identification and morphological description of 46 types of pollen: one of a gymnosperm genus (Podocarpus; and 45 of angiosperm taxa across 27 families-one family of monocotyledons (Poaceae and 26 families (30 types of dicotyledons. The most common angiosperm families were Amaranthaceae (Chenopodium, Amaranthus and Gomphrena; Fabaceae (Fabaceae type, Bauhinia, Inga and Canavalia; Malpighiaceae (Tetrapteris, Heteropteris and Peixotoa; Malvaceae (Sida, Abutilon, Hibiscus and Pseudobombax; Rubiaceae (Faramea, Borreria and Psychotria; Asteraceae (Eupatorium and tribe Vernonieae; Bignoniaceae (Bignoniaceae type, Adenocalymma and Tabebuia; and Onagraceae (Fuchsia and Ludwigia. The palynoflora in this study are associated with dense montane and submontane Atlantic Forest, semideciduous forest and restinga (coastal woodland, all of which are present in the state of Rio de Janeiro. Palynological analysis can provide important data about paleovegetation and paleoclimatic changes in the studied area during the Quaternary, specifically in the last 145,000 years.

  20. Effect of maternal antibodies and pig age on the antibody response after vaccination against Glässers disease. (United States)

    Pomorska-Mól, Małgorzata; Markowska-Daniel, Iwona; Rachubik, Jarosław; Pejsak, Zygmunt


    The influence of age and maternal antibodies on the development and duration of postvaccinal antibody response against Glässer's disease were investigated. Pigs born to immune (MDA-positive) and non-immune (MDA-negative) sows were vaccinated with inactivated vaccine. Vaccination was done according to three different protocols: at 1 and 4, at 2 and 5 or at 4 and 7 weeks of age. There were also two control groups for MDA-negative and MDA-positive pigs. The level of Haemophilus parasuis (Hps) specific antibodies were determined using commercial ELISA test. No serological responses were seen in any of the groups after the first vaccination. Maternally derived antibodies (MDA) against Hps were above the positive level until approximately 3 weeks of life in MDA-positive pigs. In those pigs the strongest postvaccinal humoral response was observed in piglets vaccinated at 4 and 7 weeks of age. In the remaining MDA-positive piglets only slight seroconversion was noted but levels of antibodies never exceeded values considered as positive. All MDA-negative pigs produced Hps-specific antibodies after the second vaccination. The results of the present study indicated that MDA may alter the development and duration of active postvaccinal antibody response. Age of pigs at the moment of vaccination was not associated with the significant differences in the magnitude of antibody response, however influenced the kinetics of decline of Hps-specific antibodies.

  1. Design and electronic power supply of double salience variable reluctance machines; Conception et alimentation electronique des machines a reluctance variable a double saillance

    Energy Technology Data Exchange (ETDEWEB)

    Multon, B.


    This work deals with the optimization of double salience variable reluctance motors with electronic switching. It includes the control laws, the electromagnetic structure and the direct and indirect self-driving sensors. The first chapter presents the state-of-the-art of double salience reluctance machines, their characteristics, their inverters and the evolutions of their electromagnetic structure. Chapters 2 and 3 treat of the optimization of power supplies and of the electromagnetic structure, respectively. Finally, the last chapter treats of original solutions of position measurement for the self-control, one using a variable reluctance sensor, and the other using an indirect sensor. The impact of the motor characteristics on the power supply has been analyzed with the optimization of the control laws in permanent regime and low torque undulation regime. The influence of the motor structure geometry on the electromagnetic characteristics has been studied using analytic methods coupled with punctual finite-element calculations. Using a particular example, a self-oscillating power supply mode has been implemented in order to reduce the losses and the electromagnetic pollution. (J.S.)

  2. Electromagnetically Induced Grating Without Absorption Using Incoherent Pump (United States)

    Chen, Yu-Yuan; Liu, Zhuan-Zhuan; Wan, Ren-Gang


    We propose a scheme for creating electromagnetically induced grating in a four-level double- Λ atomic system driven by a coupling field and an incoherent pump field. Owing to the incoherent pumping process, large refractivity accompanied with vanishing absorption or even gain across the probe field can be built up in the atoms, thus phase grating or gain-phase grating, which diffracts a probe light into different directions, can be formed with the help of a standing-wave coupling field. The diffraction efficiency of the gratings can be tuned by the coupling field intensity and the incoherent pump rate, hence the proposed gratings should be suitable for beam splitter and optical switching in optical communication and networking.

  3. On electromagnetic and quantum invisibility (United States)

    Mundru, Pattabhiraju Chowdary

    The principle objective of this dissertation is to investigate the fundamental properties of electromagnetic wave interactions with artificially fabricated materials i.e., metamaterials for application in advanced stealth technology called electromagnetic cloaking. The main goal is to theoretically design a metamaterial shell around an object that completely eliminates the dipolar and higher order multipolar scattering, thus making the object invisible. In this context, we developed a quasi-effective medium theory that determines the optical properties of multi-layered-composites beyond the quasi-static limit. The proposed theory exactly reproduces the far-field scattering/extinction cross sections through an iterative process in which mode-dependent quasi-effective impedances of the composite system are introduced. In the large wavelength limit, our theory is consistent with Maxwell-Garnett formalism. Possible applications in determining the hybridization particle resonances of multi-shell structures and electromagnetic cloaking are identified. This dissertation proposes a multi-shell generic cloaking system. A transparency condition independent of the object's optical and geometrical properties is proposed in the quasi-static regime of operation. The suppression of dipolar scattering is demonstrated in both cylindrically and spherically symmetric systems. A realistic tunable low-loss shell design is proposed based on the composite metal-dielectric shell. The effects due to dissipation and dispersion on the overall scattering cross-section are thoroughly evaluated. It is shown that a strong reduction of scattering by a factor of up to 103 can be achieved across the entire optical spectrum. Full wave numerical simulations for complex shaped particle are performed to validate the analytical theory. The proposed design does not require optical magnetism and is generic in the sense that it is independent of the object's material and geometrical properties. A generic

  4. Neutrinoless double beta decay

    Indian Academy of Sciences (India)


    Oct 6, 2012 ... The physics potential of neutrinoless double beta decay is discussed. Furthermore, experimental considerations as well as the current status of experiments are presented. Finally, an outlook towards the future, work on nuclear matrix elements and alternative processes is given. Keywords. Double beta ...

  5. A double-sided linear primary permanent magnet vernier machine. (United States)

    Du, Yi; Zou, Chunhua; Liu, Xianxing


    The purpose of this paper is to present a new double-sided linear primary permanent magnet (PM) vernier (DSLPPMV) machine, which can offer high thrust force, low detent force, and improved power factor. Both PMs and windings of the proposed machine are on the short translator, while the long stator is designed as a double-sided simple iron core with salient teeth so that it is very robust to transmit high thrust force. The key of this new machine is the introduction of double stator and the elimination of translator yoke, so that the inductance and the volume of the machine can be reduced. Hence, the proposed machine offers improved power factor and thrust force density. The electromagnetic performances of the proposed machine are analyzed including flux, no-load EMF, thrust force density, and inductance. Based on using the finite element analysis, the characteristics and performances of the proposed machine are assessed.

  6. Achado incidental de glândula sebácea em colo uterino: provavelmente um processo metaplásico


    Ogata,Daniel Cury; Pereira Neto,Elisiário; Perin, Daiana Paola; May, Bruna Miers


    As glândulas sebáceas ectópicas são achados muito infrequentes no trato genital feminino. Descrevemos um caso que ocorreu em paciente de 42 anos de idade, submetida à histerectomia total, devido à leiomiomatose e ao prolapso uterino.

  7. Efficient transformer for electromagnetic waves (United States)

    Miller, R.B.

    A transformer structure for efficient transfer of electromagnetic energy from a transmission line to an unmatched load provides voltage multiplication and current division by a predetermined constant. Impedance levels are transformed by the square of that constant. The structure includes a wave splitter, connected to an input transmission device and to a plurality of output transmission devices. The output transmission devices are effectively connected in parallel to the input transmission device. The output transmission devices are effectively series connected to provide energy to a load. The transformer structure is particularly effective in increasing efficiency of energy transfer through an inverting convolute structure by capturing and transferring energy losses from the inverter to the load.

  8. Health Effects of Electromagnetic Fields

    Directory of Open Access Journals (Sweden)

    Peter Gajšek


    Full Text Available Abstract: Devices that emit electromagnetic fields (EMF have become a part of our daily life and can be found in telecommunications, industry, traffic, science, medicine and in every household. Due to the fact that general public is massively exposed to the EMF, even very small health effects could become a serious public health problem. Many studies show that the EMF above a certain threshold can have a negative health impact. The studies, which could explain the question of health risks as a result of chronic exposure to low intensities, are often contradictory and deficient. In this review the state of the art in the field of health risks associated with the EMF exposure in our environment is presented.

  9. The CLAS Forward Electromagnetic Calorimeter

    Energy Technology Data Exchange (ETDEWEB)

    M. Amarian; Geram Asryan; Kevin Beard; Will Brooks; Volker Burkert; Tom Carstens; Alan Coleman; Raphael Demirchyan; Yuri Efremenko; Hovanes Egiyan; Kim Egiyan; Herb Funsten; Vladimir Gavrilov; Kevin L. Giovanetti; R.M. Marshall; Berhard Mecking; R.C. Minehart; H. Mkrtchan; Mavrik Ohandjanyan; Youri Sharabian; L.C. Smith; Stepan Stepanyan; W.A. Stephens; T.Y. Tung; Carl Zorn


    The CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab utilizes six iron-free superconducting coils to provide an approximately toroidal magnetic field. The six sectors are instrumented individually to form six independent spectrometers. The forward region (8deg < (theta) < 45deg) of each sector is equipped with a lead-scintillator electromagnetic sampling calorimeter (EC), 16 radiation lengths thick, using a novel triangular geometry with stereo readout. With its good energy and position resolution, the EC is used to provide the primary electron trigger for CLAS. It is also used to reject pions, reconstruct pi-0 and eta decays and detect neutrons, This paper treats the design, construction and performance of the calorimeter.

  10. Formal analysis of electromagnetic optics (United States)

    Khan-Afshar, Sanaz; Hasan, Osman; Tahar, Sofiène


    Optical systems are increasingly being used in safety-critical applications. Due to the complexity and sensitivity of optical systems, their verification raises many challenges for engineers. Traditionally, the analysis of such systems has been carried out by paper-and-pencil based proofs and numerical computations. However, these techniques cannot provide accurate results due to the risk of human error and inherent approximations of numerical algorithms. In order to overcome these limitations, we propose to use theorem proving (i.e., a computer-based technique that allows to express mathematical expressions and reason about their correctness by taking into account all the details of mathematical reasoning) as a complementary approach to improve optical system analysis. This paper provides a higher-order logic (a language used to express mathematical theories) formalization of electromagnetic optics in the HOL Light theorem prover. In order to demonstrate the practical effectiveness of our approach, we present the analysis of resonant cavity enhanced photonic devices.

  11. Visualizing electromagnetic vacuum by MRI

    CERN Document Server

    Chandrashekar, Chandrika S; Chandrashekar, S; Taylor, Erika A; Taylor, Deanne M


    Based upon Maxwell's equations, it has long been established that oscillating electromagnetic (EM) fields incident upon a metal surface decay exponentially inside the conductor, leading to a virtual EM vacuum at sufficient depths. Magnetic resonance imaging (MRI) utilizes radiofrequency (r.f.) EM fields to produce images. Here we present the first visualization of an EM vacuum inside a bulk metal strip by MRI, amongst several novel findings. We uncover unexpected MRI intensity patterns arising from two orthogonal pairs of faces of a metal strip, and derive formulae for their intensity ratios. Further, we furnish chemical shift imaging (CSI) results that discriminate different faces (surfaces) of a metal block according to their distinct nuclear magnetic resonance (NMR) chemical shifts, which holds much promise for monitoring surface chemical reactions noninvasively. Bulk metals are ubiquitous, and MRI is a premier noninvasive diagnostic tool. Combining the two, the emerging field of bulk metal MRI can be expe...

  12. Transistor Clamped Five-Level Inverter using Non-Inverting Double Reference Single Carrier PWM Technique for photovoltaic applications

    DEFF Research Database (Denmark)

    Bhaskar, Mahajan Sagar; Padmanaban, Sanjeevikumar; Fedák, Viliam


    This treatise deals with Transistor Clamped Five Level Inverter using Non-Inverting Double Reference Single Carrier PWM (NIDRSC PWM) Technique. Conventional or two level inverter have drawbacks like: i) Requirement of fast switching devices, ii) Very high dv/dt, iii) High Electromagnetic Interfer......This treatise deals with Transistor Clamped Five Level Inverter using Non-Inverting Double Reference Single Carrier PWM (NIDRSC PWM) Technique. Conventional or two level inverter have drawbacks like: i) Requirement of fast switching devices, ii) Very high dv/dt, iii) High Electromagnetic...

  13. The electromagnetic radiation fields of a relativistic electron avalanche with special attention to the origin of narrow bipolar pulses (United States)

    Cooray, G. V.; Cooray, G. K.


    .1029/2006GL027426. [3] Cooray, V. and G. Cooray (2010), IEEE Transactions on Electromagnetic Compatibility, 52, No. 4, 944 - 955. [4] Eack, K. B. (2004), Geophys. Res. Lett., Vol. 31, L20102, doi: 10.1029/2005GL023975.

  14. Scattering theory of stochastic electromagnetic light waves. (United States)

    Wang, Tao; Zhao, Daomu


    We generalize scattering theory to stochastic electromagnetic light waves. It is shown that when a stochastic electromagnetic light wave is scattered from a medium, the properties of the scattered field can be characterized by a 3 x 3 cross-spectral density matrix. An example of scattering of a spatially coherent electromagnetic light wave from a deterministic medium is discussed. Some interesting phenomena emerge, including the changes of the spectral degree of coherence and of the spectral degree of polarization of the scattered field.

  15. Modeling Electromagnetic Scattering From Complex Inhomogeneous Objects (United States)

    Deshpande, Manohar; Reddy, C. J.


    This software innovation is designed to develop a mathematical formulation to estimate the electromagnetic scattering characteristics of complex, inhomogeneous objects using the finite-element-method (FEM) and method-of-moments (MoM) concepts, as well as to develop a FORTRAN code called FEMOM3DS (Finite Element Method and Method of Moments for 3-Dimensional Scattering), which will implement the steps that are described in the mathematical formulation. Very complex objects can be easily modeled, and the operator of the code is not required to know the details of electromagnetic theory to study electromagnetic scattering.

  16. Scattering by an electromagnetic radiation field (United States)

    Bini, D.; Geralico, A.


    Motion of test particles in the gravitational field associated with an electromagnetic plane wave is investigated. The interaction with the radiation field is modeled by a force term à la Poynting-Robertson entering the equations of motion given by the 4-momentum density of radiation observed in the particle’s rest frame with a multiplicative constant factor expressing the strength of the interaction itself. Explicit analytical solutions are obtained. Scattering of fields by the electromagnetic wave, i.e., scalar (spin 0), massless spin (1)/(2) and electromagnetic (spin 1) fields, is studied too.

  17. Interactions between electromagnetic fields and matter

    CERN Document Server

    Steiner, Karl-Heinz


    Interactions between Electromagnetic Fields and Matter deals with the principles and methods that can amplify electromagnetic fields from very low levels of signals. This book discusses how electromagnetic fields can be produced, amplified, modulated, or rectified from very low levels to enable these for application in communication systems. This text also describes the properties of matter and some phenomenological considerations to the reactions of matter when an action of external fields results in a polarization of the particle system and changes the bonding forces existing in the matter.

  18. The eighth national electromagnetics meeting. Extended abstracts

    Energy Technology Data Exchange (ETDEWEB)

    Eloranta, E.; Jokela, K. [eds.


    The National Electromagnetics Meeting has been arranged annually since 1991 in Finland. The purpose of the meeting is to convene the persons working with problems of electromagnetics and to enhance the interaction between different research groups in different disciplines. The eighth meeting was held at the Radiation and Nuclear Safety Authority (STUK) August 27, 1998. The meeting is also the national meeting of the URSI (L`Union Radio-Scientifique Internationals)(Commission B: Fields and Waves) and the IEEE MTT/AP/ED Finland Chapter (Institute of Electrical and Electronics Engineers, Inc.). The report includes the extended abstracts of the presentations given in the National Electromagnetics Meeting at STUK. (orig.)

  19. Metamaterial-based wideband electromagnetic wave absorber. (United States)

    La Spada, Luigi; Vegni, Lucio


    In this paper, an analytical and numerical study of a new type of electromagnetic absorber, operating in the infrared and optical regime, is proposed. Absorption is obtained by exploiting Epsilon-Near-Zero materials. The structure electromagnetic properties are analytically described by using a new closed-form formula. In this way, it is possible to correlate the electromagnetic absorption properties of the structure with its geometrical characteristics. Good agreement between analytical and numerical results was achieved. Moreover, an absorption in a wide angle range (0°-80°), for different resonant frequencies (multi-band) with a large frequency bandwidth (wideband) for small structure thicknesses (d = λp/4) is obtained.

  20. Electromagnetic Properties Analysis on Hybrid-driven System of Electromagnetic Motor (United States)

    Zhao, Jingbo; Han, Bingyuan; Bei, Shaoyi


    The hybrid-driven system made of permanent-and electromagnets applied in the electromagnetic motor was analyzed, equivalent magnetic circuit was used to establish the mathematical models of hybrid-driven system, based on the models of hybrid-driven system, the air gap flux, air-gap magnetic flux density, electromagnetic force was proposed. Taking the air-gap magnetic flux density and electromagnetic force as main research object, the hybrid-driven system was researched. Electromagnetic properties of hybrid-driven system with different working current modes is studied preliminary. The results shown that analysis based on hybrid-driven system can improve the air-gap magnetic flux density and electromagnetic force more effectively and can also guarantee the output stability, the effectiveness and feasibility of the hybrid-driven system are verified, which proved theoretical basis for the design of hybrid-driven system.

  1. Congenital maxillary double lip

    Directory of Open Access Journals (Sweden)

    Dinesh Singh Chauhan


    Full Text Available Double lip, also referred to as "macrocheilia," is a rare anomaly which affects the upper lip more commonly than the lower lip. It consists of a fold of excess or redundant hypertrophic tissue on the mucosal side of the lip. The congenital double lip is believed to be present at birth and becomes more prominent after eruption of teeth. It affects esthetics and also interferes with speech and mastication. Simple surgical excision produces good functional and cosmetic results. We report a case of a non-syndromic congenital maxillary double lip in a 21-year-old male patient.

  2. Electromagnetic sounding of the Earth's interior

    CERN Document Server

    Spichak, Viacheslav V


    Electromagnetic Sounding of the Earth's Interior 2nd edition provides a comprehensive up-to-date collection of contributions, covering methodological, computational and practical aspects of Electromagnetic sounding of the Earth by different techniques at global, regional and local scales. Moreover, it contains new developments such as the concept of self-consistent tasks of geophysics and , 3-D interpretation of the TEM sounding which, so far, have not all been covered by one book. Electromagnetic Sounding of the Earth's Interior 2nd edition consists of three parts: I- EM sounding methods, II- Forward modelling and inversion techniques, and III - Data processing, analysis, modelling and interpretation. The new edition includes brand new chapters on Pulse and frequency electromagnetic sounding for hydrocarbon offshore exploration. Additionally all other chapters have been extensively updated to include new developments. Presents recently developed methodological findings of the earth's study, including seism...

  3. Detection of electromagnetic radiation using nonlinear materials (United States)

    Hwang, Harold Y.; Liu, Mengkun; Averitt, Richard D.; Nelson, Keith A.; Sternbach, Aaron; Fan, Kebin


    An apparatus for detecting electromagnetic radiation within a target frequency range is provided. The apparatus includes a substrate and one or more resonator structures disposed on the substrate. The substrate can be a dielectric or semiconductor material. Each of the one or more resonator structures has at least one dimension that is less than the wavelength of target electromagnetic radiation within the target frequency range, and each of the resonator structures includes at least two conductive structures separated by a spacing. Charge carriers are induced in the substrate near the spacing when the resonator structures are exposed to the target electromagnetic radiation. A measure of the change in conductivity of the substrate due to the induced charge carriers provides an indication of the presence of the target electromagnetic radiation.

  4. Method and apparatus for measuring electromagnetic radiation (United States)

    Been, J. F. (Inventor)


    An apparatus and method are described in which the capacitance of a semiconductor junction subjected to an electromagnetic radiation field is utilized to indicate the intensity or strength of the radiation.

  5. Morgantown People Mover Electromagnetic Compatibility Program (United States)


    Electromagnetic Compatibility (EMC) of a transit system is the absence of interference between all parts of the system, and between the system and the community which it serves. This report documents the EMC experience obtained during the design and ...

  6. Integration of basic electromagnetism and engineering technology

    DEFF Research Database (Denmark)

    Bentz, Sigurd


    and retain much of the course material, which in turn makes their subsequent studies more difficult. We describe a freshman course in electromagnetism which alleviates these problems. Our hypothesis is that the course material is difficult to grasp because of its abstract nature. Consequently the purely...... and their application in technology students get a more comprehensive understanding of electromagnetism, and they are able to apply the physical principles to problems they encounter later in their careers......The theory of electromagnetism is taught as a part of most contemporary electrical engineering curricula. Usually a basic course is intended to cover all the fundamental electromagnetic theory which is needed in later engineering courses. However it is often found that students fail to understand...

  7. 1st Applied Electromagnetic International Conference

    CERN Document Server

    Othman, Mohd; Aziz, Mohamad; Malek, Mohd


    In this book, experts from academia and industry present the latest advances in scientific theory relating to applied electromagnetics and examine current and emerging applications particularly within the fields of electronics, communications, and computer technology. The book is based on presentations delivered at APPEIC 2014, the 1st Applied Electromagnetic International Conference, held in Bandung, Indonesia in December 2014. The conference provided an ideal platform for researchers and specialists to deliver both theoretically and practically oriented contributions on a wide range of topics relevant to the theme of nurturing applied electromagnetics for human technology. Many novel aspects were addressed, and the contributions selected for this book highlight the relevance of advances in applied electromagnetics to a variety of industrial engineering problems and identify exciting future directions for research.

  8. Scattering of electromagnetic waves by obstacles

    CERN Document Server

    Kristensson, Gerhard


    The main purpose of Scattering of Electromagnetic Waves by Obstacles is to give a theoretical treatment of the scattering phenomena, and to illustrate numerical computations of some canonical scattering problems for different geometries and materials.

  9. Nanomechanical electric and electromagnetic field sensor (United States)

    Datskos, Panagiotis George; Lavrik, Nickolay


    The present invention provides a system for detecting and analyzing at least one of an electric field and an electromagnetic field. The system includes a micro/nanomechanical oscillator which oscillates in the presence of at least one of the electric field and the electromagnetic field. The micro/nanomechanical oscillator includes a dense array of cantilevers mounted to a substrate. A charge localized on a tip of each cantilever interacts with and oscillates in the presence of the electric and/or electromagnetic field. The system further includes a subsystem for recording the movement of the cantilever to extract information from the electric and/or electromagnetic field. The system further includes a means of adjusting a stiffness of the cantilever to heterodyne tune an operating frequency of the system over a frequency range.

  10. Reducing physical appearance of electromagnetic sources

    National Research Council Canada - National Science Library

    Tichit, Paul-Henri; Burokur, Shah Nawaz; de Lustrac, André


    .... By applying transformations that compress space, and then that match it to the surrounding environment, we show how the electromagnetic appearance of radiating elements can be tailored at will...

  11. Airborne electromagnetic imaging of discontinuous permafrost

    National Research Council Canada - National Science Library

    Burke J. Minsley; Jared D. Abraham; Bruce D. Smith; James C. Cannia; Clifford I. Voss; M. Torre Jorgenson; Michelle A. Walvoord; Bruce K. Wylie; Lesleigh Anderson; Lyndsay B. Ball; Maryla Deszcz-Pan; Tristan P. Wellman; Thomas A. Ager


    .... Here, we present the results of a pioneering 1,800 line-kilometer airborne electromagnetic survey that shows sediments deposited over the past 4 million years and the configuration of permafrost...

  12. Serpentine Robot Arm Contains Electromagnetic Actuators (United States)

    Moya, Israel A.; Studer, Philip A.


    Identical modules assembled into flexible robot arm configured in serpentlike fashion to manipulate objects while avoiding obstacles. Each module includes integral electromagnetic actuators energized selectively to produce variety of motions, stationary configurations, and combinations thereof.

  13. Propagation of SLF/ELF electromagnetic waves

    CERN Document Server

    Pan, Weiyan


    This book deals with the SLF/ELF wave propagation, an important branch of electromagnetic theory. The SLF/ELF wave propagation theory is well applied in earthquake electromagnetic radiation, submarine communication, thunderstorm detection, and geophysical prospecting and diagnostics. The propagation of SLF/ELF electromagnetic waves is introduced in various media like the earth-ionospheric waveguide, ionospheric plasma, sea water, earth, and the boundary between two different media or the stratified media. Applications in the earthquake electromagnetic radiation and the submarine communications are also addressed. This book is intended for scientists and engineers in the fields of radio propagation and EM theory and applications. Prof. Pan is a professor at China Research Institute of Radiowave Propagation in Qingdao (China). Dr. Li is a professor at Zhejiang University in Hangzhou (China).

  14. Electromagnetic field computation by network methods

    CERN Document Server

    Felsen, Leopold B; Russer, Peter


    This monograph proposes a systematic and rigorous treatment of electromagnetic field representations in complex structures. The book presents new strong models by combining important computational methods. This is the last book of the late Leopold Felsen.

  15. Intentional Electromagnetic Interferences in Communication Devices


    Md. Abdul Nabi; Jayalakshmi, R; Dr. K. Umapathy


    IEMI is the intentional generation of electromagnetic energy introducing noise or signals into electrical andor electronic systems by interrupting damaging and diverting these systems for jamming terrorist or criminal malicious purposes.

  16. 2nd Applied Electromagnetic International Conference

    CERN Document Server

    Sulaiman, Hamzah; Othman, Mohd; Aziz, Mohamad; Malek, Mohd


    In this book, experts from academia and industry present the latest advances in scientific theory relating to applied electromagnetics and examine current and emerging applications particularly within the fields of electronics, communications, and computer technology. The book is based on presentations delivered at APPEIC 2015, the 2nd Applied Electromagnetic International Conference, held in Krabi, Thailand in December 2015. The conference provided an ideal platform for researchers and specialists to deliver both theoretically and practically oriented contributions on a wide range of topics relevant to the theme of nurturing applied electromagnetics for human technology. Many novel aspects were addressed, and the contributions selected for this book highlight the relevance of advances in applied electromagnetics to a variety of industrial engineering problems and identify exciting future directions for research.

  17. Correlations of electromagnetic fields in chaotic cavities

    CERN Document Server

    Eckhardt, B; Kühl, T; Stöckmann, H J


    We consider the fluctuations of electromagnetic fields in chaotic microwave cavities. We calculate the transversal and longitudinal correlation function based on a random wave assumption and compare the predictions with measurements on two- and three-dimensional microwave cavities.

  18. Electromagnetic Behaviour of Metallic Wire Structures

    CERN Document Server

    Chui, S T


    Despite the recent development and interest in the photonics of metallic wire structures, the relatively simple concepts and physics often remain obscured or poorly explained to those who do not specialize in the field. Electromagnetic Behaviour of Metallic Wire Structures provides a clear and coherent guide to understanding these phenomena without excessive numerical calculations.   Including both background material and detailed derivations of the various different formulae applied, Electromagnetic Behaviour of Metallic Wire Structures describes how to extend basic circuit theory relating to voltages, currents, and resistances of metallic wire networks to include situations where the currents are no longer spatially uniform along the wire. This lays a foundation for a deeper understanding of the many new phenomena observed in meta-electromagnetic materials.   Examples of applications are included to support this new approach making Electromagnetic Behaviour of Metallic Wire Structures a comprehensive and ...

  19. Carbon nanostructure composite for electromagnetic interference ...

    Indian Academy of Sciences (India)


    based composite materials for electromagnetic interference (EMI) shielding. With more and more electronic gadgets being used at different frequencies, there is a need for shielding them from one another to avoid interference.

  20. Resonant Electromagnetic Shunt Damping of Flexible Structures

    DEFF Research Database (Denmark)

    Høgsberg, Jan Becker


    Electromagnetic transducers convert mechanical energy to electrical energy and vice versa. Effective passive vibration damping of flexible structures can therefore be introduced by shunting with an accurately calibrated resonant electrical network thatcontains a capacitor to create the desired...