Similarities and differences of the thermal analysis issues between the intelligent and general AC contactors are analyzed. Heat source model of the magnet system is established according to the unique control mode of the intelligent AC contactor. Linking with the features common of the two kinds of contactors, the extension of the ...

The a.c. resistance and inductance of a coplanar waveguide with nonideal conductivity are computed by means of a quasi-static mode-matching method. Convergence is examined and the numerical results are compared to those obtained by a full-wave mode-matching method. Regarding the frequency dependence, significant ...

... 123. Percent Complete by Mode of Transportation (ACS). Overview ... Percent Complete by Mode of Transportation (ACS). -. -. Links on this page: Page ...

Nb-Ti ultrafine multifilamentary wires with Cu-Si alloy matrix have been fabricated for AC use. An AC coil of 100 kVA-class capacity was wound by the stranded wire, and the coil has been operated in AC mode successfully. The stranded wire is composed of six elemental wires of 0.203 mm in diameter and a central ...

The paper considers the electrical characteristics of an arc-mode slagging segmented Faraday generator studied with voltage probes, an ac resistance instrument, and a wide-view optical port. Cathode gap deterioration was observed during operation with the ac resistance instrument and correlated with the decrease in Hall voltage ...

This proposal is a test and verification of the ACS dump of CS memory capability. Areas to dump include: EEPROM, PROM, EDAC RAM, and Buffer RAM with the CS in OPERATE mode.

... BY DC AN AC ELECTROCHEMICAL TECHNIQUES AS COMPARED ... IMPEDANCE DIAGRAMS SHOW THAT A SLIGHTLY ...

VLF (very low frequency) mode instability with parallel AC electric field was studied for generalized loss-cone distribution with an index j, which is reducible to bi-Maxwellian, loss-cone and delta function for j = 0,1 and ?. The particle trajectories and dispersion relation are obtained through a kinetic approach and method of characteristic solutions. ...

We discovered structurally novel human calcium-sensing receptor (CaSR) allosteric agonists and compared their pharmacology to phenylalkylamine calcimimetics. 1-Benzothiazol-2-yl-1-(2,4-dimethyl-phenyl)-ethanol (AC-265347) activated CaSR signaling in cellular proliferation and phosphatidylinositol (PI) hydrolysis assays with potencies of 30 and 10 nM, ...

It is important to generate fast fluid flow yet maintain low temperature rise for ac electrothermal (ac ET) pumping in microsystems with conductive fluids. This has been generally the limitation of ac ET driven micropump applications. We present an enhanced ac ET pumping mechanism using low voltage ...

An experimental study is under way to assess the performance of electrode-supported solid-oxide cells operating in the steam electrolysis mode for hydrogen production. The cells currently under study were developed primarily for the fuel cell mode of operation. Results presented in this paper were obtained from single cells, with an active area of 16 cm2 ...

An experimental study is under way to assess the performance of electrode-supported solid-oxide cells operating in the steam electrolysis mode for hydrogen production. The cells currently under study were developed primarily for the fuel cell mode of operation. Results presented in this paper were obtained from single cells, with an active area of 16 cm2 ...

The coupling of Alfvén Cascade (AC) modes or reversed-shear Alfvén eigenmodes (rsAE) to Geodesic Acoustic Modes (GAM) implies that the range of the AC frequency sweep is reduced as the electron β is increased. This model provides an explanation for the otherwise surprising absence of AC ...

In this paper, a model with a small number of parameters is used to simulate the motion of a cantilever in the AC mode of an atomic force microscope (AFM). The results elucidate the transition dependence-from noncontact to tapping operating mode-on the height of the contamination layer and on the stiffness of the sample.

We hypothesized that partial liquid ventilation (PLV) with perflubron in spontaneously breathing lung-injured animals would increase respiratory workload compared to animals treated with gas ventilation (GV), and that a fully synchronized mode, assist-control ventilation (AC), would reduce the piglets' effort when ...

This thesis proposes and investigates application of a three-phase AC-AC Matrix Converter (MC), as an alternative to the conventional AC-DC-AC converter system, to interface a Micro-Turbine-Generator (MTG) unit as a Distributed Generation (DG) unit to a utility distribution grid. As compared with a conventional ...

To take advantage of the wide latitude of computed radiography (CR), the AC series manufactured by Fuji uses an exposure data recognizer (EDR) system which may be operated in one of three modes: automatic, semi-automatic (semi auto), and fixed. This study evaluated the performance of these EDR modes in comparison with a conventional ...

The tearing mode stability of the radial profiles of current density resulting from the skin effect accompanying AC modulation is calculated using a computer program. An AC component was superposed on the plasma current and a computer program was designed...

Burst Threshold: If the log AC value exceeds this threshold, burst mode is ... The AC EDR product contains alternating current (AC) level values at the ...

An experiment was performed on the pulsator Tokamak at Garching in which an ac component was superposed on the plasma current. To interpret and plan these experiments, a computer program was developed to calculate the current distributions accompanying the ac modulation taking into account the skin effect. The experiments show that ac ...

... Induction (AC) Modes of Operation ... Page 4. Compact, Low-Noise Magnetic Sensor with Fluxgate and Induction modes of Operation i. ...

crack can experience any manner of mixed-mode loading. Prediction of the resulting ..... Mixed-mode crack growth can transition between path ...

In this mode the Antenna Pointing Assembly (APA) generates a circular scan pattern which is sent to the Antenna Control System (ACS). ...

In this mode the Antenna Pointing Assembly (APA) generates a circular scan pattern which is sent to the Antenna Control System (ACS). ...

In this mode the Antenna Pointing Assembly (APA) generates a circular scan pattern which is sent to the Antenna Control System (ACS). ...

This paper demonstrates a thermally actuated tapping mode atomic force microscopy (AFM) with a polymer cantilever. The cantilever (350�250�3 ?m3) is made from polyimide and includes an embedded resistive heater for thermal actuation. The oscillation of the cantilever is due to the stress gradient caused by alternating heating and cooling from the periodic ...

This article reports on some theoretical studies concerning the impulsional mode of a cylindrical ion trap (CIT) supplied with a periodic impulsional radio frequency (rf) voltage of the form V(ac)cos?t/(1-kcos2?t) with 0 ? k < 1. The performance characteristics of CIT impulsional mode, for the twelve stability regions, were computed ...

The ACS Nearby Galaxy Survey Treasury (ANGST) has acquired deep ACS imaging of a field in the outer disk of the large spiral galaxy M81. These data were obtained over a total of 20 Hubble Space Telescope orbits, providing a baseline long enough to reliably identify Cepheid variable stars in the field. Fundamental mode and first ...

INTRODUCTION: Platelets play a central role in the pathophysiology of acute coronary syndromes (ACS) and activation of platelet glycoprotein (GP) IIb/IIIa receptor is critical to platelet aggregation. Abciximab, a human murine chimeric antibody to the GPIIb/IIIa receptor, is an important biological therapy in the management of patients presenting with ACS. ...

The catalytic activity of the CoAcAc)/sub 2/-Et/sub 2/Al(AcAc) system in the hydrogenation of styrene and benzene has been studied and compared to the Co(AcAc)/sub 2/-AlEt/sub 3/ catalytic system. It is shown that the use of Et/sub 2/Al(AcAc) leads to a reduction of catalytic activity toward ...

The coupling of Alfv�n Cascade (AC) modes or reversed-shear Alfv�n eigenmodes (rsAE) to Geodesic Acoustic Modes (GAM) implies that the range of the AC frequency sweep is reduced as the electron ? is increased. This model provides an explanation for the otherwise surprising absence of AC ...

A novel approach is presented to improve the dynamic stability of a parallel AC-DC power system. The developed scheme employs a proportional-integral-derivative (PID) power system stabilizer (PSS) and a PID rectifier current regulator (RCR) to enhance the damping for the electromagnetical mode of the system. The parameters of the proposed PID controllers ...

Language: English ...

A field population (SZ) of Plutella xylostella, collected from the cabbage field in Shenzhen, Guangdong Province of China in 2002, showed 2.3-fold resistance to Cry1Aa, 110-fold to Cry1Ab, 30-fold to Cry1Ac, 2.1-fold to Cry1F, 5.3-fold to Cry2Aa and 6-fold resistance to Bacillus thuringiensis var. kurstaki (Btk) compared with a susceptible strain (ROTH). ...

The study aimed at examination of tissue expression of polysaccharides and secretory mucin 5AC (MUC5AC) in young patients (up to 25 years of age) with a symptomatic gallstones. For comparison, patients most frequently subjected to cholecystectomy were studied, i.e. patients of approximately 50 years of age with the same diagnosis. In quantitative studies ...

We present preliminary results obtained from the observations with MAD@VLT of the globular cluster NGC 6388. This study has two aims: first, to assess the capabilities of the Multi-Conjugate Adaptive Optics (MCAO) corrections in crowded fields photometry and, second, to couple the deepest ACS/HST optical observations with comparable NIR observations (in ...

Oscillatory deformations of micrometer-sized NaCl-water droplets by an AC electric field are used for contact angle measurements on superhydrophobic surfaces. Contact angles are determined from the dependence of the lowest-order resonant frequency of the electrically driven droplet oscillations on the droplet size. The resonant frequency and size of a droplet are found using ...

Salmonella and Escherichia coli O157:H7 (EC) contamination continues to be one of the major concerns for the microbiological safety of raw poultry and beef products. Application of more than one decontamination agent as a multi-hurdle intervention to carcasses in a processing line might produce greater reductions than one treatment alone due to different modes of action of ...

A new interpretation of the observed periods in AC Andromedae as the first three radial over-tones is investigated. It is shown that this mode identification agrees well with a stellar model of about 0.5 solar masses belonging to the suprahorizontal branch. In this picture AC Andromedae is a c-type RR Lyrae variable. Further ...

BackgroundThe mechanisms behind formation and filling of intracranial arachnoid cysts (AC) are poorly understood. The aim of this study was to evaluate AC fluid by proteomics to gain further knowledge about ACs. Two goals were set: 1) Comparison of AC fluid from individual patients to determine whether or not ...

This paper is a modeling study of whistler wave propagation in an infinite bi-Maxwellian magnetoplasma in the presence of an ac electric field. The authors derive the dispersion relations for the instability using a method of characteristic solutions. They determine the growth rate of the instability. They find that the ac field parameters modify the ...

... Accession Number : ADD202265. Title : Analysis of Mode I and Mode II Interlaminar Fracture Specimens by a Comparative Finite Element Method,. ...

A laboratory analysis of a CPN Corporation's model AC-2 asphalt content gauge was performed to determine if the CPN AC-2 gauge could measure asphalt contents with the same degree of accuracy and repeatability as the Troxler Electronic Laboratories', Inc. ...

Describes the action of a capacitor when dc is applied and when ac is applied. Describes and illustrates the phase relationship between voltage and current in a capacitor when ac is applied. Compares the voltage and current relationship in an inductive an...

The program describes the action of a capacitor when DC is applied and when AC is applied. It describes and illustrates the phase relationship between voltage and current in a capacitor when AC is applied. It also compares the voltage and current relation...

Enterotoxigenic Escherichia coli (ETEC) expressing K88 (F4) adhesins are associated with post-weaning diarrhoea in piglets. Different grain fractions from pea (Pisum sativum) and faba bean (Vicia faba) were tested in vitro for their capacity to counteract aetiological factors, which contribute to the development of diarrhoea. In detail, adhesion of E.�coli O149:K91:K88ac ...

2',3'-O-(N-Methylanthraniloyl)-ITP (MANT-ITP) is the most potent inhibitor of mammalian membranous adenylyl cyclase (mAC) 5 (AC5, K(i), 1 nM) yet discovered and surpasses the potency of MANT-GTP by 55-fold (J Pharmacol Exp Ther 329:1156-1165, 2009). AC5 inhibitors may be valuable drugs for treatment of heart failure. The aim of this ...

of wireless stations or expected through- put of each AC queue with diffferent PLRs. In each test into the 802.11e MAC channel model to obtain the PLR of each AC for each video sequence. The predicted PLRs

A novel AC amplifier for electrophysiological measurements that uses three op-amps based instrumentation amplifier (IA), and active suppression of the input offset was designed. The development followed the requirements to increase the common mode rejecti...

SINCGARS. KG-84 A/C. KY-58. KG-96. KY-58. Fastlane. KG-84 A/C. Vocoder. ATM. Windows NT. Internet Router. SNMP. JTRS Waveforms & Crypto Algorithms ...

The relation between the AC-admittance of single mode electron waveguides is discussed in terms of the more complete scattering matrix of the same structure. For low frequencies, the admittance coincides with the series- inductance expressions in the lite...

The report presents guidelines for selection of asphalt-overlaid concrete (AC/PCC) pavements for rehabilitation, collection of distress data, recognition of AC/PCC pavement distress modes, nondestructive deflection testing, materials sampling, an overall ...

The dependence of various upstream Scrape-Off Layer (SOL) widths on the line-averaged density (n e), plasma current (Ip), and power into the SOL (PSOL) for H-mode plasmas was investigated, using the mid-plane fast reciprocating probe and Thomson scattering diagnostics, in the National Spherical Torus Experiment (NSTX). The heat flux width (?q) at the divertor plate, measured ...

Conducted electromagnetic interference (EMI) generated by PWM inverter-fed induction motor drive systems, which are currently widely used in many industrial and/or avionic applications, causes severe parasitic current problems, especially at high frequencies (HF). These restrict power electronic drive's evolution. In order to reduce or minimize these EMI problems, several techniques can be ...

This two-volume report presents the development and first application of a methodology for using generic PRA information to identify risk-important systems and components at a plant lacking a PRA. The methodology requires the detailed analysis of both similarities and differences between related plants. It is applied in an analysis of the Rancho Seco plant using information from PRAs for the ANO-1 ...

Comparing the physics of hydrogen plasmas with deuterium plasmas is important for the validation of key issues in plasma physics, such as ion mass dependences. This is vitally important for the first operational phase of ITER, which will use hydrogen plasmas. The issues for hydrogen plasmas include: (a) determining the H-mode power threshold and validating ...

A system is described for power conditioning a line of supply of AC power from an AC source to an AC load, comprising: a first array of static power switches mounted across one AC source and AC load; a second array of static power switches coupled in series with the AC ...

The effectiveness of an alpha-chloralose (AC)-corn oil suspension, an AC-margarine mixture, and AC tablets were compared for immobilizing Canada geese (Branta canadensis). Responses to AC immobilization also were compared in male and female Canada geese. There was no ...

This paper reports on the experimental characterization of collapse-mode operation of capacitive micromachined ultrasonic transducers (CMUTs). CMUTs are conventionally operated by applying a direct current (DC) bias voltage less than the collapse voltage of the membrane, so that the membrane is deflected toward the bottom electrode. In the conventional regime, there is no ...

Arc Welding (GTAW) process or the Plasma Arc Welding (PAW) process including AC, . SWAC, DC, and VP process modes. Any other proposed processes must be ...

acquisition mode even with just the ACS loops closed. The SMC is responsible for second stage X-Y pointing, aiming to correct for pointing errors that cannot be ...

... to use ac voltages to operate the light valve. ... light activated voltage gate for the ... Descriptors : *LIQUID CRYSTALS, *VALVES, *SCREENS(DISPLAYS ...

been the development of a two-wheel backup control ... of a redundant fourth wheel from the ACS design; ... wheel control design in a timely fashion, a design ...

... Title : A Comparative Mechanophysiological Study of Fish Locomotion with Implications for Tuna-Like Swimming Mode,. ...

The yield of two proteins, avidin and green fluorescent protein (GFP), expressed from a modified Autographa californica nucleopolyhedrovirus (AcMNPV), was compared in Sf9 cell culture monolayer, Sf21 cell suspension culture and intact Spodoptera litura larvae. GFP expressed from the p10 promoter yielded up to 1.5% of total soluble protein in larvae, ...

This paper presents digital control schemes for control of two permanent magnet (PM) machines in an integrated traction and air-conditioning compressor drive system for automotive applications. The integrated drive system employs a five-leg inverter to power a three-phase traction PM motor and a two-phase compressor PM motor by tying the common terminal of the two-phase motor to the neutral point ...

The development of neural cell topography in the retinal ganglion cell layer was examined in a teleost, the black bream (Acanthopagrus butcheri). From Nissl-stained wholemounts, it was established that fish between 10 and 15 mm standard body length (SL) possess high cell densities throughout the dorso-temporal retinal quadrant, with peak cell densities located in temporal regions of the retina. ...

Emergency department physicians, along with hospitalists and interventional cardiologists, provide first-line care for patients experiencing symptoms potentially associated with acute coronary syndromes (ACS). Because these health care providers encounter and manage patients with varying degrees of risk, a clear understanding of the modes of action, ...

The electric power distribution systems for spacecraft are compared concentrating on two interrelated issues: the choice between dc and high frequency ac, and the converter/inverter topology to be used at the power source. The relative merits of dc and ac...

Mar 5, 2009 ... GYROS: AC ON. FDS MODE. XB DATA RATE(MI). FDS MODE. XB DATA RATE(MI). VGR COVERAGE. ISSUE DATE: THURSDAY. MARCH 5, 2009. 064-065 ...

Jul 5, 2001 ... Reply: kuznet@ms2.inr.ac.ru: "Re: Persist Mode -- ** Standards bug ??" Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ...

to diagnosis (diagnosability analysis, generation of the FMEA - Failure Mode Effect Analysis, generation of on such as the diagnosability of the system being designed or the analysis of the FMEA (Failure Mode Effects Analysis, which into ac- count? When and how is FMEA performed? When and how is the diagnostic software developed

A power transistor used in a chopper circuit to control field excitation of a vehicle motor when in a power mode is also used to control charging current from an a-c to d-c rectifier to the vehicle battery when in a battery charging mode. Two isolating di...

... Some of the detonators were confined in mock HE inserts to compare the performance of a confined detonator with that of an unconfined detonator. ...

... There was a trend toward earlier elevation of troponin-I and creatine kinase in patients with myocarditis compared with ACS. ...

Routine high power operation of the ICRF heating system (up to 3.5 MW at 80 MHz) has enabled study of enhanced confinement modes in Alcator C-Mod up to B_T=8 T. L-mode plasmas are well characterized by the ITER89-P scaling, but are observed only at low power levels under typical operating conditions. H-mode is routinely observed at ...

This paper describes circuit topologies for 3-phase pulse-width modulation (PWM) boost rectifiers that operate with a unity fundamental power factor and a low-distortion ac line current. Overlap delays between the switching of the upper and lower devices in a PWM rectifier leg are not critical and diodes eliminates the possibility of the dc-link capacitor discharging into ...

High harmonic fast wave (HHFW) heating properties for ELM-free and ELMy H-mode plasmas are being compared to investigate the effects of ELMs on HHFW heating efficiency and edge HHFW power losses. In general, core heating is reduced and edge heating is increased in the NB and HHFW driven ELMy H-mode regimes. The goal is to determine to ...

This test of the coronagraphic procedure duplicates observations that have been taken in normal 3-gyro mode in proposal . It will take place in the period February 21st to 23rd 2005, or February 28th to March 2nd. The available roll angles depend on the dates. Earth flats with the coronagraph in place are taken every week as part of proposal 10377. The last observation taken ...

The Rayleigh-Taylor instability is a gravity driven instability of a contact surface between fluids of different densities. The growth of this instability is sensitive to numerical or physical mass diffusion. For this reason, high resolution of the contact discontinuity is particularly important. In this paper, we address this problem using a second order TVD finite difference scheme with ...

Long implosion time wire array experiments have been carried out on the 7-MA Saturn accelerator at Sandia National Laboratories. Such experiments are motivated by the incentive that longer implosion times translate to reduced cost and power flow risk to existing and future, high current generators. However, this mode of driver is desirable only if similar implosion velocities ...

The reusability of Co(3)O(4) (AC-Co), MnO(2) (AC-Mn) and CuCoO(4) (AC-CC) loaded activated carbon (AC) and their element mercury removal efficiency had been studied using a laboratory-scale fixed-bed reactor under simulated flue gas conditions. Tests showed that spent AC-Co could be regenerated ...

Manned interplanetary missions using nuclear propulsion systems, comparing alternative modes such as

Compares modes of operation: Electronic Code Book; Cipher Block Chaining; Cipher Feedback; Output Feedback; Counter

... Keywords: Health care; Patient access modes. Descriptors : *OUTPATIENT CLINICS, EFFICIENCY, MEDICINE, ACCESS, PSYCHOLOGY ...

the 1999 March thermal vacuum test of ACS, the Stimulus for Ultraviolet Flat Fields (STUFF) apparatus was used to provide external flat field illumination of the SBC channel. STUFF was developed by Doug ACS and is much brighter than the more widely diffused Spectralon mode. Since neither STUFF

The nonlinear stationary ac response of the magnetization of assemblies consisting of (i) noninteracting uniaxial superparamagnetic nanoparticles with aligned easy axes and (ii) randomly oriented nanoparticles subjected to superimposed ac and dc bias magnetic fields of arbitrary strength and orientation is calculated by averaging Gilbert's equation ...

The complex dielectric constant ({epsilon}{sup *}) is reported for multiwalled carbon nanotubes (MWCNTs) up to 10{sup 5} Hz as a function of ac-electric field amplitudes E{sub rot} (in phase and same frequency as the measurement) and E{sub ac} (different phase and fixed frequency with respect to the measurement). A slow relaxation process ...

The surface chemistry of a commercial AC (AC(0)) was selectively modified, without changing significantly its textural properties, by chemical oxidation with HNO(3) (AC(HNO3)) and O(2) (AC(O2)), and thermal treatments under H(2) (AC(H2)) or N(2) (AC(N2)) flow. The effect of ...

The genome of the baculovirus Autographa californica nuclear polyhedrosis virus (AcMNPV) contains two homologues, orf145 and orf150, of the Heliothis armigera Entomopoxvirus (HaEPV) 11,000-kDa gene. Polyclonal antibodies raised against the Ac145 or Ac150 protein were utilized to demonstrate that they are expressed from late to very ...

The genome of the baculovirus Autographa californica nuclear polyhedrosis virus (AcMNPV) contains two homologues, orf145 and orf150, of the Heliothis armigera Entomopoxvirus (HaEPV) 11,000-kDa gene. Polyclonal antibodies raised against the Ac145 or Ac150 protein were utilized to demonstrate that they are expressed from late to very ...

A novel high-frequency alternating current (AC) electrospray ionization (ESI) source has been developed for applications in mass spectrometry. The AC ESI source operates in a conical meniscus mode, analogous to the cone-jet mode of direct current (DC) electrosprays but with significant physical and mechanistic ...

Nov 29, 2007 ... 0039 GYRO INIT. 0039 GYROS AC ON. 0049 GYRO FAULT TEST. Page 1 of 19 ... GYROS: AC. FDS MODE. XB DATA RATE(MI). FDS MODE. XB DATA RATE(MI) ...

The aim of this paper is to describe the conception of a newly developed simple converter which fuses the photovoltaic power and the ac power of the distribution network. The design consideration, detailed circuit and the characteristics of the fusion mode of this converter are discussed. The results of a preliminary field test are reported to facilitate ...

Performance Analysis of Sleep Mode Operation in IEEE 802.16e Mobile Broadband Wireless Access University, Seoul, Korea Email: schoi@snu.ac.kr Abstract-- In this paper, we analytically evaluate the sleep mode operation of the IEEE 802.16e, defined for the power saving. In the sleep mode, an Mobile

We study whether or not sine-Gordon kinks exhibit internal modes or "quasimodes." By considering the response of the kinks to ac forces and initial distortions, we show that neither intrinsic internal modes nor "quasimodes" exist in contrast to previous reports. However, we do identify a different kind of internal ...

Although amorphous carbon (a-C) materials are being widely used, relaxed atomic structures of a-C have not yet been investigated in detail. In this study, a-C structures were relaxed in molecular simulations, and their structural properties and phonon properties were investigated. As a result, several nanoscale fractional graphitic ...

The absolute single-shot pulse energy of the SPring 8 extreme ultraviolet (EUV) free electron laser (FEL) was measured using a cryogenic radiometer with a relative standard uncertainty of 3%. The temperature change of the cavity in the cryogenic radiometer caused by an incident FEL pulse was determined using a lock-in amplifier and an ac Wheatstone bridge. The measured pulse ...

Abstract- Zero-current-transition, discontinuous-conduction-mode (ZCT-DCM) converters are intro-duced in this paper. Compared to hard-switching (PWM) converters in DCM, the ZCT-DCM con-verters have similar current stresses and conduction losses, and much reduced turn-off switching losses. At the expense of increased voltage stresses, ...

Development of CXCR4-specific ligands is an important issue in chemotherapy of HIV infection, cancer metastasis, and rheumatoid arthritis, and numerous potential ligands have been developed to date. However, it is difficult to assess their binding mode and specificity because of uncertainties in the structure of the CXCR4-ligand complexes. To address this problem, we have ...

Jun 16, 2011... monitoring systems to compare treatment effectiveness. A paired watershed approach uses two adjacent and similar catchments (5-20 ac) ...

In situ amendment of contaminated sediments using activated carbon (AC) is a recent remediation technique, where the strong sorption of contaminants to added AC reduces their release from sediments and uptake into organisms. The current study describes a marine underwater field pilot study in Trondheim harbor, Norway, in which powdered ...

The article considers the possibilities of saving the regenerative braking energy in �koda 24Tr type trolleybuses by installing the onboard supercapacitor energy storage system (ESS) and improving its performance with automated switching to the autonomous traction mode. Proposed is an ESS control system with constant DC bus voltage in the supercapacitor charging ...

The characteristics of advanced discharge modes were investigated through measurements of spatiotemporal infrared emission, discharge current, infrared intensity, and luminous efficacy in an ac plasma display panel with an auxiliary electrode located between scan and common electrodes. Pulse waveforms that included auxiliary pulses applied to the auxiliary ...

We derive the surface Q for an arbitrary mode, compare azimuthal to radial mode signal, discuss cell size considerations, and compare to nonresonant PAS. 6 refs.

The purpose of this test program was to evaluate the application of a baghouse to an FBC system and provide data to be used in future fabric filter designs. The goals of the program were to: determine mass collection efficiencies of baghouse; determine outlet emissions in terms of lbs particulate/10/sup 6/ Btu fired as compared with the New Source Performance Standard of 0.03 ...

Point mutations and molecular modeling have been used to study the activation of the M₁ muscarinic acetylcholine receptor (mAChR) by the functionally selective agonists 4-n-butyl-1-[4-(2-methylphenyl)-4-oxo-1-butyl]-piperidine (AC-42), and 1-[3-(4-butyl-1-piperidinyl)propyl]-3,4-dihydro-2(1H)-quinolinone (77-LH-28-1), comparing ...

The physical properties of oxygen deficient polycrystalline rm YBa_2Cu_3O_{7 -delta} superconducting materials have been systematically investigated. These properties include magnetic susceptibility, electrical transport, thermoelectric power and infrared reflectivity. A great deal of this study has concentrated on the magnetic and transport properties of these materials when they are in the mixed ...

A power source provides continuous ac power by employing a bidirectional converter which interfaces a rechargable dc power storage device with ac mains power and ac loads. The bidirectional converter includes a transformer having first and second windings coupled in reverse polarity through dual switching means in parallel with one ...

An undergraduate level experiment is described to demonstrate the role of probabilistic observations in physics. A capacitor and a DC voltmeter are used to randomly sample an AC voltage source. The resulting probability distribution is analyzed to extract information about the AC source. Different characteristic probability distributions arising from ...

A study comparing the results of a digital computer program and an hvdc simulator is reported. The digital computer program permits the study of combined ac-dc systems, and provides a complete representation of one or more hvdc transmission systems in a large scale interconnected ac system. The hvdc simulator is a model of the dc ...

Based on Natu- rally-Occurring Bile Ac- ids. Macromolecules, 2009, 42 (19), pp 7324� 7331. Andr Plante Multi-methacrylate Derivatives of Bile Acids: A Comparative Study with Commercial Monomers", ACS Applied Multi-methacrylate Derivatives of Bile Acids: A Comparative Study with Commercial Monomers", ...

WHAT IS ALREADY KNOWN ABOUT THIS SUBJECTIn determining the effects of alcohol or assessing alcohol�drug interactions, it is helpful if the alcohol plasma concentration can be maintained at reasonably stable levels.To achieve pseudo-steady state alcohol concentrations various methods are used.In this study two different methods were optimized and compared in the search for an ...

Muzzle devices for reducing the blast and flash levels received by the AC-130 gunship were investigated. A noise suppressor design decreased the blast levels only minimally while the flash level increased compared to the standard flash hider. Extension tu...

This report is one of a series produced to highlight results from the 2009 American Community Survey (ACS). It presents poverty estimates based on data from the 2008 and the 2009 ACS. The report compares national and state level poverty rates and summariz...

A method of detecting AC resistance bridge error signals with low sensitivity to stray reactances is presented. The detector, which compares magnitudes of two bridge signals, can be used in a fast resistance temperature control to maintain constant resist...

A method of detecting AC resistance bridge error signals with low sensitivity to stray reactances is presented. The detector, which compares magnitudes of two bridge signals, can be used in a fast resistance temperature control to maintain constant resist...

The purpose of the INEL testing was to provide test results from which an evaluation of the performance capabilities of the Eaton ac powertrain could be made and compared with other electric vehicle propulsion systems. The major portion of the testing inv...

ITEM: Long Spacer Weld Mold Impressions: #171 (LS-4A-C047), #173 (LS-4A-C048), ... impressions from the long spacer, LS-4A, using an optical comparator. ...

Compared to other available methods, ac dielectrophoresis is particularly well-suited for the manipulation of minute particles in micro- and nano-fluidics. The essential advantage of this technique is that an ac field at a sufficiently high frequency supp...

Results are given for the permeability, conductivity, and dielectric constant of a multifilament superconductor, treated as an anisotropic state of matter. The calculations are made for the limiting cases of strong and weak ac magnetic fields compared with the field required for complete penetration of the filaments. General expressions are given ...

The Primary Standards Laboratory (PSL) presently uses a manually operated dc bridge to calibrate standard platinum resistance thermometers (SPRTs). The PSL will replace the dc bridge with a computer controlled ac bridge. The two bridges are compared for c...

... TABLE 2 Principal mechanical properties of Titanium, TI-6A1-4V compared with aluminium alloy 7075 and D6AC steel. ... D6AC 1400 1500 10 ...

The theory and calculation of a.c. losses in type II superconducting materials and superconducting coils are presented. The calculated losses are compared to loss-measurements in solenoids performed by several laboratories. Methods of loss measurements are described. (author)

Five macrocycles containing 1,5-disubstituted acetylacetone units (AcAc) have been synthesized. Their abilities to complex metal cations in water--dioxane have been compared to those of noncyclic model compounds. The AcAc units were bound together through bridges composed of the following groups: oxa (O), ethylene (E), and ...

Critical currents and AC losses of (Bi, Pb)2Sr2Ca2Cu3Ox superconducting tapes were measured in self-field as a function of temperature. The experimental data of the temperature dependence of critical current were compared with calculated results. An approach to calculating AC losses as a function of temperature was developed and the ...

A novel mode transformer was fabricated that transforms a modal area by a factor of 100. Using the mode transformer improves the efficiency of mode transformation by an order of magnitude compared with that when no mode transformer is used. With this mode transformer, ...

The influence of a spectrum of drift wave fluctuations on the trapped ion mode is investigated and shown to inhibit the onset of these modes. The stochastic damping of the trapped ion mode becomes comparable to the linear growth rate when the drift wave spectrum is described by previous theoretical models.

This project developed new Light Emitting Diode (LED) driver ICs associated with specific (uniquely operated) switching power supplies that optimize performance for High Brightness LEDs (HB-LEDs). The drivers utilize a digital control core with a newly developed nonlinear, hysteretic/sliding mode controller with mixed-signal processing. The drivers are flexible enough to ...

JET discharges using neon and argon impurity seeding have produced H-mode plasmas with improved confinement using the MkII-Gas Box configuration. The impurity concentrations in the JET sub-divertor are measured with a Penning gauge coupled to a photo-multiplier system, and are used along with spectrometer and bolometer measurements in the plasma edge and strike point region. ...

The effect of different outer conducting configurations on the stability of a cylindrical plasma of radius a is treated with emphasis on the k approx. 0, n = 1 mode associated with the usual surface perturbation e/sup ikz+-in theta. The conducting configuration comprises of either one or more segments of a cylindrical shell or conducting cylinder with gaps in it, or segments ...

In recent years, various types of fault current limiter (FCL) have been developed, because installation of the FCL will bring a lot of benefits to power system operation. Power system controllers based on a concept of Flexible AC Transmission Systems (FACTS) can also be applicable as the FCL with growing power ratings of them. Such FCLs are expected to contribute power system ...

The wild-type strain of Chlamydomonas reinhardi and 3 mutant strains ac-21, ac-141, and ac-115 have been compared for their fluorescence (and luminescence) properties. The different fluorescence levels, the rapid and slow photochemical responses affecting fluorescence, and the intensity of luminescence have been ...

The wild-type strain of Chlamydomonas reinhardi and 3 mutant strains ac-21, ac-141, and ac-115 have been compared for their fluorescence (and luminescence) properties. The different fluorescence levels, the rapid and slow photochemical responses affecting fluorescence, and the intensity of luminescence have been ...

Reduction of ac losses in applied ac fields can be accomplished through either the creation of filaments and bridging in YBCO coated conductors or an assembly of narrow width YBCO tapes. The ac losses for each of these geometries were measured at 77 K in perpendicular ac fields up to 100 mT. While ...

In the acetoclastic methanogen Methanothrix soehngenii, acetate is activated to acetyl coenzyme A by acetyl coenzyme A synthetase (Acs). The acs gene, coding for the single Acs subunit, was isolated from a genomic library of M. soehngenii DNA in Escherichia coli by using antiserum raised against the purified Acs. ...

In this thesis, a novel bi-directional DC-to-AC inverter is proposed to achieve dynamic robustness of the output voltage, i.e., the output voltage of the inverter remains dynamically unchanged when there are large disturbances of the supply voltage or the load current. The control technique is to simultaneously feedback the output voltage and feed-forward the supply voltage ...

We compare the amplification of various modes in large mode area fibers when the pump is coupled into the fundamental core mode versus the standard cladding-pump scheme. Our simulations show that pumping in the LP(01) core mode results in differential gain for the fundamental signal ...

The platinum group elements (PGE) comprise Ru, Rh, Pd, Os, Ir, and Pt. The PGE are extremely siderophile and most of the elements were during the Earth differentiation partitioned into the core. The average natural concentration of PGE in Earth's crust is low and range of 0.X - X0 ?g kg-1. During the magmatic process the PGE are strongly partitioned into sulphides and Ni minerals. The distribution ...

A theory was developed to compare vibration modes obtained by NASTRAN analysis with those obtained experimentally. Because many more analytical modes can be obtained than experimental modes, the analytical set was treated as expansion functions for puttin...

Measurements and understanding of energetic ion driven instabilities such as TAE, Alfven cascades (ACs), and chirping modes are crucial for assessing all aspects of such instabilities in burning plasmas. Ion loss and Alfven spectroscopy associated with energetic ion-driven modes were investigated in experiments on JET and on MAST with ...

Adenocarcinomas (AC), squamous cell carcinomas (SCC) and adenosquamous carcinomas (ASC) are three histological subtypes of non-small-cell lung carcinomas (NSCLC). ASC are morphologically mixed tumours that contain the two cell components AC and SCC. To understand if they are a "simple" mix of AC and SCC or if they present molecular ...

Although comparative genetic mapping studies show extensive genome conservation among grasses, recent data provide many exceptions to gene collinearity at the DNA sequence level. Rice, sorghum, and maize are closely related grass species, once sharing a common ancestor. Because they diverged at different times during evolution, they provide an excellent model to investigate ...

We demonstrate a technique for exciting spin waves in an ultracold gas of 87Rb atoms on the basis of tunable ac Stark potentials. This technique allows us to excite normal modes of spin waves with arbitrary amplitudes in the trapped gas, including dipole, quadrupole, octupole and hexadecapole modes. These modes ...

A power transistor used in a chopper circuit to control field excitation of a vehicle motor when in a power mode is also used to control charging current from an a-c to d-c rectifier to the vehicle battery when in a battery charging mode. Two isolating diodes and a small high frequency filter inductor are the only elements required in ...

A power transistor used in a chopper circuit to control field excitation of a vehicle motor when in a power mode is also used to control charging current from an a-c to d-c rectifier to the vehicle battery when in a battery charging mode. Two isolating diodes and a small high frequency filter inductor are the only elements required in ...

Corona discharges in gases exist under several distinctive forms. In this paper, a survey study has been made of ac corona discharge modes generated in some different gases fed in a wire-duct reactor with a constant rate of flowing at atmospheric pressure. The properties of different corona modes are analyzed under some condition ...

The dynamics of the enolic form of acetylacetone (E-AcAc) was investigated using a femtosecond pump-probe experiment. The pump at 266 nm excited E-AcAc in the first bright state, S2(pi pi*). The resulting dynamics was probed by multiphoton ionization at 800 nm. It was investigated for 80 ps on the S2(pi pi*) and S1(n pi*) potential energy surfaces. An ...

Language: English ...

... Numerical results are compared with the experimental modeling results of the American Nucleonics Corporation. (Author). ...

Language: English ...

Language: English ...

This report presents results of a study to determine the fatigue behavior of rubber modified pavements in Alaska in comparison with conventional asphalt concrete pavements. Laboratory studies were conducted on field specimens using the flexural fatigue test in the controlled-displacement mode. Tests were performed at 72 deg F and 40 deg F. Tested materials include (1) ...

A new dc/ac inversion for achieving an ac sinusoidal waveform synthesized by a series of quasisinusoidal pulses is described. A modified pulse-width-modulated (PWM) controller is presented for driving the power switch to operate in a forced discontinuous-conduction mode (FDCM) so as to achieve series-resonance in the power stage. The ...

We present the first study of the variable star populations in the isolated dwarf spheroidal galaxies (dSphs) Cetus and Tucana. Based on Hubble Space Telescope images obtained with the Advanced Camera for Surveys in the F475W and F814W bands, we identified 180 and 371 variables in Cetus and Tucana, respectively. The vast majority are RR Lyrae stars. In Cetus, we also found three anomalous Cepheids ...

BackgroundArachnoid cyst (AC) fluid has not previously been compared with cerebrospinal fluid (CSF) from the same patient. ACs are commonly referred to as containing "CSF-like fluid". The objective of this study was to characterize AC fluid by clinical chemistry and to compare ...

The preponderant application of rectifier circuits is the powering of dc loads from the ac utility line. Ordinary rectifier circuits present a nonlinear load impedance to the utility line, thereby generating harmonic currents, and contributing to the harmonic current problem. There are many active and passive rectifier circuits offering reduced harmonic currents, and in this ...

Structural characteristics, thermal transitions and molecular dynamics of selected poly(amide urethane)s with transition metal acetyl acetonates Me(AcAc)(2) (Me = Sn(4+), Zn(2+), Cu(2+), Pb(2+)) as chain extenders, were comparatively investigated using small- and wide-angle X-ray scattering (SAXS, WAXS), differential scanning calorimetry (DSC), and ...

Structural characteristics, thermal transitions and molecular dynamics of selected poly(amide urethane)s with transition metal acetyl acetonates Me(AcAc){2} (Me = Sn4+, Zn2+, Cu2+, Pb2+) as chain extenders, were comparatively investigated using small- and wide-angle X-ray scattering (SAXS, WAXS), differential scanning calorimetry (DSC), and dielectric ...

BACKGROUND There are no population-based data comparing analgesics after Mohs micrographic surgery (MMS) and reconstruction. OBJECTIVE To compare the efficacy in pain management of three analgesic combinations. METHODS In a randomized, double-blind, controlled study, patients undergoing MMS and reconstruction for head and neck skin cancers received ...

ObjectiveTo introduce the American Community Survey (ACS) and its measure of health insurance coverage to researchers and policy makers.Data Sources/Study SettingWe compare the survey designs for the ACS and Current Population Survey (CPS) that measure insurance coverage.Study DesignWe describe the ACS and how it ...

Acute coronary syndrome (ACS) is a continuum of disease that includes non-ST-segment elevation ACS and ST-segment elevation myocardial infarction. The purpose of this article is to define the developing role of ticagrelor in ACS and compare it to currently available P2Y(12) receptor inhibitors. While clopidogrel ...

Mass separated sources of {sup 227}Pa (separated as PaF{sub 4}{sup +} ions) were used to study the level structure of {sup 223}Ac following alpha decay. The levels in {sup 223}Ac are interpreted as K = 5/2{sup {plus minus}} parity doublet bands which occur naturally in reflection asymmetric models and the multiphonon octupole model. The anomalous structure ...

In this study we investigated the use of activated carbon (AC) as a soil amendment for reducing bioavailability of polychlorinated biphenyls (PCBs) to the earthworm Eisenia fetida. Artificial soil was contaminated with PCBs and used in bioaccumulation experiments fresh or after aging for 19 months. PCB bioaccumulation in earthworms was reduced by 68% when ...

Modulation of power transmitted over a proposed multiterminal dc system to provide effective stability enhancement of a large ac system in the Southwestern U.S. is demonstrated in this paper. This proposed multiterminal dc system connecting the Phoenix, Mead and Los Angeles areas could be in parallel with an Extra High-Voltage (EHV) ac transmission network ...

This paper introduces the ant colony system (ACS), a distributed algorithm that is applied to the traveling salesman problem (TSP). In the ACS, a set of cooperating agents called ants cooperate to find good solutions to TSP�s. Ants cooperate using an indirect form of communication mediated by a pheromone they deposit on the edges of the TSP graph while ...

The stability of acetyl-CoA synthetases (ACS1 and ACS2) from P. blakesleeanus against temperature, urea and trypsin was studied and compared. Thermal inactivation of ACS1 was biphasic, while that of ACS2 was monophasic. The thermodynamic parameters calculated from the inactivation profiles show ...

This study statistically compares spark test faults from spark testers using ac and equivalent dc potentials. Two spoolers that rewind PVC insulated copper conductors were equipped with a 3 kHz. ac bead chain electrode spark tester and a dc bead chain ele...

A power factor analysis of the input part of an advanced AC/DC/AC converter for variable speed wind turbines is presented. Two types of rectifying input converters are compared: the boost rectifier, consisting of three AC inductors, a three-phase diode br...

from Ruta graveolens (20, 21). This difference in CHS and ACS suggests that Phe-265 may play a role-directed mutants were generated by using the QuikChange (Stratagene) protocol. R. graveolens This paper Comparison of ACS and the CHS F215S Mutant. For compar- ison to the CHS F215S mutant, R. graveolens ACS2

... et al. 2001; Adamczyk and Meredith 2004), and plant structures, such as terminal leaves, express more Cry1Ac compared ... et al. 2001). These Cry1Ac expression differences among plant structures and culti...

A comparison was made between the most recent DOE-developed AC electric vehicle drive systems and that which is independently under development by Unique Mobility of Golden, Colorado. The DOE-developed AC systems compared in this study are the Single-Shaf...

In this paper the AC losses requirement for the superconducting coils of the Next European Torus (NET) project are discussed on the basis of the pulsed field scenario and plasma disruptions. The AC losses test results on the prototype 40 kA cable-in-conduit superconductors developed for NET are presented: the performance achieved is ...

Summary: Data visualization can play a key role in comparative genomics, for example, underpinning the investigation of conserved synteny patterns. Strudel is a desktop application that allows users to easily compare both genetic and physical maps interactively and efficiently. It can handle large datasets from several genomes simultaneously, and allows ...

Ac and dc potential systems for monitoring fatigue crack growth are examined with reference to the measurements method, system elements, calibration, sensitivity, and operating characteristics. A specific specimen is used to compare the systems. It is shown that while dc systems are easier to use and provide reasonable measurement sensitivity and ...

In order to achieve a high-efficiency high-density cryogenic instrumentation system, the power processing electronics should be placed in the cold environment along with the sensors and signal-processing electronics. The typical instrumentation system requires low voltage dc usually obtained from processing line frequency ac power. Switch-mode power ...

It is a well observed characteristic that when a DCT block is traversed in the zigzag order, the AC coefficients generally decrease in size and the run-length of zero coefficients increase in number. This article presents a minor modification to the Huffman coding of the JPEG baseline compression algorithm to exploit this redundancy. For this purpose, DCT blocks are divided ...

Microwave sintering is a very interesting subject, which provides an alternative method to overcome problems faced with conventional sintering. This process is very efficient and only requires a few minutes. In this paper, nanocomposite electrodes (Cu0.15Ni0.85-GDC) were sintered at 700 degrees C for 10 mins in a single mode 2.45 GHz microwave oven by the solid state reaction ...

Infection with Aspergillus terreus is more likely to result in invasive, disseminated disease when compared to other Aspergillus species; importantly this species appears to be less susceptible to the antifungal drug amphotericin B. Unique to this species is the ability to produce specialized structures denoted as accessory conidia (AC) directly on hyphae ...

Mar 10, 2005 ... H = High Power Transmitter. T = TLC Uplink. *Electronic Copy Only ... XB: HI. PYR: .05/.10/.25. GYROS: AC ON. FDS MODE. XB DATA RATE(MI) ...

automatic method for tracking the cavity resonance and impedance match would ... ac motor driving an eccentric crank on its shaft to modulate the stub tuner ...

This paper presents an overview of the Tropical Rainfall Measuring Mission (TRMM) Attitude Control System (ACS) along with detailed in-flight performance results for each operational mode. The TRMM spacecraft is an Earth-pointed, zero momentum bias satell...

A gage has been constructed using conventional (high end) components for the application of measuring fragile syntactic foam parts in a non-contact mode. Success with this approach has been achieved through a novel method of transferring (mapping) high ac...

Jun 24, 2011 ... At separation, the lMS ACS will be enabled to bring the reaction ...... JPL indicated that heat soak back through the vanes was a ..... spacecraft, i.e., thruster REM B-I cannot operate in the steady state mode ...

... crop failures because they were efficiently controlled by chemical insecticides ... or genetic engineering such as the CryMod toxins (Soberon et al. ... ...

... confers organophosphate and carbamate resistance, and a γ-aminobutyric acid receptor mutation of the Rdl locus conferring dieldrin ... sodium channel (pyrethroids and DDT), inhibition of γ-aminobutyric ac...

, automotive, bioengineering, materials and manufacturing. Students will develop: the skills to able to solve included: experimental analyses design oriented studies development of mathematical or computational models Engineering Rapid Product Development Fibre Reinforced Composites Material Models & Modes of failure

~150 Keithley 2182 Nano Voltmeter AC Power 1) Where are ground connections? 2) Config-Delta I-High = 1� DC/Delta Mode Measurement Keithley 6221 Current Source & 2182 NanoVoltmeter Low Triboelectric cable

... For a long single-mode electron waveguide as in Fig. ... DC- resistance R0 = h/2e2 ; 13 kQ in series with the kinetic inductance of the electrons in the ...

The internal waves in the south of the Strait of Messina (Italy) are studied using observational data and numerical simulations. The observational data consisted of SAR images, XBT probes, CTD yoyos and thermistor string profiles from the Coastal Ocean Ac...

The design, construction, and testing of a one meter diameter fiber ring optical gyro, using 1.57 kilometers of single mode fiber, are described. The various noise components: electronic, thermal, mechanical, and optical, were evaluated. Both dc and ac me...

Laminate structures composed of alternating thin layers of conductor and dielectric material are commonly used in energy storage and transmission components. The failure of the dielectric layers in regions of high field stress, with applied 60 Hz ac, dc a...

The development of a reflective mode liquid crystal light valve suitable for large screen dynamic color symbology projection display is described. The light valve consists of a sandwich structure of a thin film photoconductor, light blocking layer, broad ...

An expression derived from the current flow across the convertor transformer is used in ac-dc load flow models. Voltage ambiguity is removed, and two independent equations are derived from the specified control mode.

A functional assessment of Bacillus thuringiensis (Bt) toxin receptors in the midgut of lepidopteran insects will facilitate understanding of the toxin mode of action and provide effective strategies to counter the development of resistance. In this study, we produced anti-aminopeptidase (APN) and ...

A concentrate of acid-grade fluorspar with an unacceptably high chlorine content was subjected to a mineralogical examination. Information was required on the mode of occurrence of the chlorine. The concentrate was leached in hot water and hydrochloric ac...

The effect of frequency on the characteristics of plasmas in saline solution driven by 50�1000 Hz ac power is studied. Two distinct modes, namely bubble and jetting modes, are identified. The bubble mode occurs under low frequencies. In this mode, a millimeter-sized bubble is tightly attached ...

of evolution, and hap- loid, maternal mode of inheritance, mitochondrial DNA (mtDNA) offers certain advantages173 REFERENCE: Stone AC, Starrs JE, Stoneking, M. Mitochondrial DNA analysis of the presumptive, DNA typ- ing, mitochondrial DNA, Jesse James, exhumation Due to its high copy number, rapid rate

Two parallel magnetic flux paths are provided in a dynamoelectric machine having a superconductive field winding. A first, or main, magnetic flux path includes at least one area of nonferromagnetic or diamagnetic material. A second, or shunt, magnetic flux path prevents the relatively low frequency ac flux present during starting or asynchronous operation of the machine, when ...

Very recently Willis [Phys. Rev. E 69, 056612 (2004)] have used a collective variable theory to explain the appearance of a nonzero energy current in an ac-driven, damped sine-Gordon equation. In this Comment, we prove rigorously that the time-averaged energy current in an ac-driven nonlinear Klein-Gordon system is strictly zero. PMID:16089707