Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: NQR

Related Topics

In the News (Thu 19 Apr 18)

NQR techniques for the identification of nitrogen-containing explosives depend on the signals generated by 14N nuclei present in the solid material when irradiated with RF radiation in the frequency range 0.5 to 6 MHz.
The NQR frequencies and spectra are specific to a given explosive and provide not only a positive identification of the material but also its quantity.
The main goal of this meeting is to examine the recent advances in the capabilities and features of NQR techniques for the detection of land mines and explosives and to stimulate a strong exchange of knowledge and new ideas between basic research and applications.
www2.ijs.si /~ampere   (562 words)

 NRL Press Release
NQR is a radio frequency spectroscopy similar to nuclear magnetic resonance (NMR) and to magnetic resonance imaging (MRI).
The NQR explosives detection approach is conceptually simple: one broadcasts an RF pulse at the particular frequency or frequencies of interest and looks for a return signal with a sensitive radio receiver.
Indeed NQR for landmine detection was explored in the 1970's by the US Army and in the 1980's by the Soviet Army.
www.nrl.navy.mil /pao/pressRelease.php?Y=2000&R=13-00r   (1030 words)

 World Intellectual Property Organization   (Site not responding. Last check: 2007-10-21)
The NQR response signal is used to identify nuclei having a quadruple moment in specific chemical environments.
The application of NQR is not limited to this one isotope, as there are many other quadrupolar nuclei that have been used in material identification.
Such an apparatus would be useful in investigating several distinct lines in the NQR response from a substance, whether this is from the broadened bandwidth or the same receiving apparatus coping with an antenna that is tuned to other resonance frequencies, or a multiply tuned receiving antenna.
www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=03/107028.031224&ELEMENT_SET=DECL   (8805 words)

 Isuzu Commercial Vehicles - News - ISUZU NQR FOR 2002
Chassis construction of the NQR is a straight channel ladder type frame with a section modulus of 7.20 cubic inches and a Resistance Bending Moment (RBM) of 316,800 lbs.
To provide maximum load carrying, the NQR is equipped with front and rear semi-elliptical, multi-leaf springs and shock absorbers.
NQR is equipped with an Anti-lock Brake System (ABS) for safer vehicle operation.
www.isuzucv.com /news/2002_1.html   (564 words)

 Company News On Call
NQR systematically monitors and analyzes the service quality of financial services organizations with a comprehensive suite of performance measurement, quality assessment, and statistical reporting tools.
NQR also reviews and rates the related telephone/call center performance with objective evaluations incorporating 27 standard criteria and specific rules designed to determine the quality of telephone service.
NQR has a staff of 70 financial service professionals with backgrounds in load and no-load mutual funds, insurance, and variable annuity operations.
www.prnewswire.com /cgi-bin/stories.pl?ACCT=105&STORY=/www/story/03-17-2004/0002130021   (688 words)

 NRL Press Release   (Site not responding. Last check: 2007-10-21)
Because of its immunity to external electrical and magnetic environmental noise, an NQR detection system with the NRL-patented coil does not require external radio frequency (RF) shielding, and would be more practical and suitable for field use.
NQR is an RF spectroscopic technique, related to nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI).
The specimen is irradiated with RF energy at specific frequencies, and the size of the return signal indicates the presence or absence of known explosives and narcotics.
www.nrl.navy.mil /pao/pressRelease.php?Y=2000&R=30-00r   (318 words)

 KSU - new technologies   (Site not responding. Last check: 2007-10-21)
We used the pulse NQR spectrometer with 110 litres coil.Special attention was paid to the construction of the transmitter system which ensures a pulse power of about 5 kW.
Remote NQR method is of great interest for industrial,medical,chemical and biological investigations.The possibility of carrying out quality analyses of solid samples locating at some distance from the spectrometer coil is one of the main advantage.
On the other hand,in TNT the NQR frequencies are considerably lower and the relaxation times are longer,therefore the conditions for detecting NQR signals are very different.For this reason remote sending of NQR signals in TNT pose a very difficult technical problem.
www.ksu.kern.ru /nqrd.html   (528 words)

 Gueorgui Mozjoukhine(Mozszhukhin)   (Site not responding. Last check: 2007-10-21)
The Frequency Offset Effects of NQR of Spin I = 1 for Remote Detection.
V.P.Anferov, G.V.Mozjoukhine,R.Fisher."Pulsed spectrometer for NQR for remote detection of nitrogen in explosives"Rev.of Sc.Instr.,71,4, 2000,1656-1659.
G.V.Mozszhukhin, V.S.Grechishkin, N.Ya.Sinyavski, E.V.Yurepina, “The two-frequency saturation of NQR N-14 at pulse effect”, Izvestiya vuzov,Fizika(Russia),N.8,1988, 48-51.
users.gazinter.net /mgeorge   (180 words)

 David J Daniels   (Site not responding. Last check: 2007-10-21)
Nuclear quadrupole resonance (NQR) is a radio frequency technique that is used for characterising the structural chemistry of nitrogen based compounds Rowe and Smith [1], Hibbs et al [2] and Engelbeen [3].
The time domain signature of the NQR response may be free induction decay or a series of echoes in which a time reversed image of the FID response precedes the normal one-sided FID response once the series is established.
The principal characteristics of the NQR signals which can be classified as a non-stationary time series are; an exponential decay, the presence of multiple frequencies, a short time response, an echo series, either causal or non-causal, and most importantly, a low signal to noise ratio.
demining.jrc.it /aris/events/mine99/program/P37-40/MINE-NQR.htm   (1149 words)

 Penn State-Led Team Develops New, Improved Land Mine Detector
However, all of these instruments are hampered by the fact that the NQR signal generated by explosives is small, easily drowned out by background noise and has a short duration.
The disturbance in the nitrogen nuclei, in turn, produces a characteristic NQR signal, which is recorded on a graph.
However, unlike the other available NQR-based detectors, Schiano and Ginsberg's new device is equipped with feedback control algorithms that automatically increase or decrease the repetition rate of the RF pulse and quicken or slow the time that elapses between the creation and collapse of the disturbance in the nuclear magnetization.
www.eurekalert.org /pub_releases/1998-07/PS-PSTD-060798.php   (509 words)

 National Quilt Register: About the NQR   (Site not responding. Last check: 2007-10-21)
The NQR has been a huge effort over 5 years by volunteers from all parts of the country co-ordinated by The Pioneer Women's Hut.
A core premise of the NQR is that all quilts are equally significant, from the finely stitched decorative ones to the humble, functional ones made for warmth
Thank you to the quilting groups that contributed to the NQR with generous much needed donations: The Hunter's Hill Quilters, The Wangaratta Centre Quilters, The Illawarra Quilters, The Murray River Quilters, the Canberra Quilters and the Textile Network ACT.
www.amol.org.au /nqr/about.htm   (1153 words)

NQR of [sup]{81}Br in Rb[sub]2ZnBr[sub]4: study of phase transitions.
Chlorine NQR of single crystal SnCl[sub]2 [dot] xH[sub]2O (x=1.5, 2): the evidence for the existence of hydrate with x=1.5.
NQR study of the CH[sub]3Hg-halide family solid phases.
www.fiz.uni-lj.si /bio/pirnat-cobiss.html   (3216 words)

 Valentin P. Feshin and Elena V. Feshina   (Site not responding. Last check: 2007-10-21)
Cl NQR spectra exhibit one line each at the frequency 35.814 MHz and 28.984 MHz, respectively (the signal to noise ratio for both lines is 10).
Cl NQR parameters with those resulting from RHF/6-31G(d) calculations of the investigated molecules shows that the calculations of the populations of the chlorine atom valence p-orbitals are incorrect.
The incorrectness may be caused by the displacement of the coordinate origin and by the deviation of the symmetry axes of the chlorine atom valence p-orbitals from the directions of the coordinate axes during the calculation process.
www.arkat-usa.org /ark/journal/2001/I09_Voronkov/174/174F.asp   (1400 words)

 NQR   (Site not responding. Last check: 2007-10-21)
The internal electric field gradients are a characteristic of the material, and hence each material will have characteristic resonance frequencies.
This makes NQR an obvious candidate method for the detection of different chemical species.
For more information see the list of NQR References.
www.phy.mtu.edu /~suits/NQR.html   (78 words)

 Nuclear Quadrupole Resonance, Wasserman's high-tech Landmine Detection
An NQR mine detector has the big advantage in that the NQR technique can detect many of the high explosives commonly used in small, anti-personnel mines.
A hardware implementation of the wavelet packet transform based on the cascaded lattice synthesis can be implemented on a dedicated chip set to provide the performance edge needed to make NQR practical in a man-portable device.
The NQR Mine Detector Project is jointly sponsored by the Defense Advanced
www.geocities.com /SiliconValley/Pines/8516/nuclear.html   (370 words)

 da Chopstick Ninjas [ News ]   (Site not responding. Last check: 2007-10-21)
NQR has started, and we welcome Crazymac back to CN after some time away.
Yup, alot of qw fights have been played (alot is relative) but anyways, we managed to loose another game in the NQR leage, so now we will prolly end up 2nd or 3rd.
We were able to beat AG in our first match in NQR Div2.
www.chopstickninjas.dk   (766 words)

 DIVISION OF NUCLEAR MAGNETIC RESONANCE   (Site not responding. Last check: 2007-10-21)
Developed new methods of two-dimensional NQR spectroscpy (of resonance irradiation and maximum entrophy method).
NQR Relaxation Studies of Molecular Dynamics in Halogenomethyl Groups in Halogenoacetates.
Influence of the rf Field Inhomogeneity on Nutation NQR Spectra of Spin 3/2 Nuclei in Powders.
www.ifmpan.poznan.pl /zp8/zp8.html   (467 words)

 Clan Zetor News   (Site not responding. Last check: 2007-10-21)
Nqr started running and we had our first fight against Shadow Minions from Sweden.
So, this news is a bit outdated, but anyway Zetor defeated Hellfire in the NQR finals straight in two rounds (2-0) which means that we are the winner of NQR season two.
As a result we have taken two more members: welcome Riker and Shiva Also, the NQR semi-final game agains Hard Guns Crew is scheduled to be played on Sunday 28th of April 20:00 CET.
www.zetor.org /znews.htm   (2399 words)

 Chemiosmotic Mechanism of Antimicrobial Activity of Ag+ in Vibrio cholerae -- Dibrov et al. 46 (8): 2668 -- ...
strain FTU (10) and to inhibit purified NQR of Vibrio alginolyticus
(13), the NQR enzyme is not crucial for the survival of Vibrio
NQR membrane vesicles as a function of the AgNO
aac.asm.org /cgi/content/full/46/8/2668   (1360 words)

NQR Parameters: Electric Field Gradient Tensor and Asymmetry Patrameter Studied in Terms of the Density Functional Theory,
Determination of the NQR Spectra Parameters of Dimer Sb Cl
J.N.Latosińska, M.Latosińska, Nogaj, Studies of the Electronic Structure of Sulfanilamide and 2,4-dichloroanilne by NQR Spectroscopy and Quantum Chemical Calculations, Abstracts of the XVI Conference on Radio and Microwave Spectroscopy RAMIS 95, Poznań, Poland, 1995, p.48.
www.staff.amu.edu.pl /~jolanala/alistkon.html   (2887 words)

 Department of Energy Information Bridge - full-text scientific and technical reports (gray literature)   (Site not responding. Last check: 2007-10-21)
Unfortunately, standard NMR and NQR spectrometers are unable to adequately detect resonances below a few megahertz due to the frequency dependent sensitivity of their Faraday coil detectors.
Previously, this spectrometer was used to observe {sup 11}B and {sup 27}Al NQR resonances.
Also, a technique was presented to observe {sup 14}N NQR resonances through cross relaxation of the nitrogen polarization to adjacent proton spins.
www.osti.gov /bridge/product.biblio.jsp?osti_id=10125943   (384 words)

 The Tufts Daily - Fear of Internet exposure affects students' NQR decisions   (Site not responding. Last check: 2007-10-21)
Though the NQR takes place on Tufts property, the event is open to the public, and the University's voyeuristic neighbors have traditionally turned out in force.
The NQR is different from other campus events such as Spring Fling, where there is a fixed perimeter and only ticket-holders may enter, Keith said.
Senior Andrea Shatzman agreed that although digital photos were a legitimate concern, the fun of the NQR trumped her anxieties.
www.tuftsdaily.com /vnews/display.v/ART/2004/12/07/41b550431bb24   (769 words)

 The NQR and NMR studies of icosahedral borides   (Site not responding. Last check: 2007-10-21)
B NMR peaks, separated by significant chemical shifts in the range from 130 ppm to 280 ppm, were clearly observed for all of the icosahedral borides that were not enriched in the
In addition to NMR responses, four strong NQR responses were observed for boron carbides from different manufacturers.
The NQR responses are not only consistent with the previous NMR studies performed independently by Silver and Bray (1959 J.
stacks.iop.org /0953-8984/11/4435   (364 words)

 Abstract - Three-Frequency NQR   (Site not responding. Last check: 2007-10-21)
We introduce a new nuclear quadrupole resonance (NQR) method for the detection of spin-1 nuclei, where the transition excited and directly detected is not irradiated at all.
It is demonstrated, theoretically and experimentally, that the irradiation of a powder sample containing spin-1 nuclei by two of the three characteristic NQR frequencies can result in free induction decay (FID) and echo signals at the third NQR frequency.
We present the optimal conditions for such three-frequency NQR experiments and compare theory with experiment using
www.phy.mtu.edu /~suits/abstracts/cpl34236201.html   (93 words)

 Digital frequency modulation in an NQR spectrometer   (Site not responding. Last check: 2007-10-21)
It performs a staircase frequency sweep with a step of 1 Hz and digitally programmed bidirectional square-wave frequency modulation in an NQR spectrometer with a frequency-locked super-regenerative oscillator.
NQR spectra parameters are not influenced by frequency modulation even when extremely large frequency modulation deviations are used.
Parameters such as the sweep rate and the amplitude of frequency modulation deviation are stable, accurately fixed and independent of the running frequency.
stacks.iop.org /0022-3735/11/45   (232 words)

 National Quality Review - Products & Services   (Site not responding. Last check: 2007-10-21)
NQR offers another service quality measurement to help clients better assess their performance relative to the top service providers in NQR's benchmark data.
The 5-Star statistical performance measures (at 95% confidence) are fixed for one year based upon the data from four quarters of NQR's top quartile companies.
On a quarterly basis, companies whose 4-quarter rolling averages for Overall Telephone Service or Transaction Processing Quality fall within the 5-star performance range will be noted as 5-star performers.
www.nqrinc.com /5-star.html   (101 words)

 BigSoccer Boards - [NQR] "FOX Soccer Channel to debut Feb. 7" (Tuesday, 1/11/05)
There's a rumor that they might be going for American World Cup TV rights after next year.
This works for me, I added the sports package just to get FSW and soccer is all I watch there.
I think that there'll still be some rugby and Aussie rules shown, but stuff like cricket, darts and F1 racing will be dropped altogether.
www.bigsoccer.com /forum/printthread.php?t=161581   (638 words)

 TruckTraderOnline.com   (Site not responding. Last check: 2007-10-21)
2001 ISUZU NQR, 2001 Isuzu NQR 18ft x 85" x 96" Box van with liftgate, turbo diesel, 175hp, automatic, AC, am/fm cass., wood slats, translucent roof, factory limited extended warranty engine/drivetrain good through 12/28/2006 or 175,000 miles.
2000 ISUZU NQR, 2000 Isuzu NQR 16ft Box van, turbo diesel, 175hp, automatic, AC, am/fm cass., transulcent roof, wood slats, factory limited extended engine/drivetrain warranty good through 06/03/05 or 175,000 miles.
2000 ISUZU NQR, 2000 Isuzu NQR 16ft Box van, turbo diesel, automatic, AC, am/fm cass., translucent roof, wood slats, factory limited engine/drivetrain extended warranty good through 08/31/05 or 175,000 miles.
www.trucktraderonline.com /dealer.html?502412   (1158 words)

 Tecmag | Home
Tecmag manufactures NMR, NQR & MRI equipment including consoles, system upgrades, data acquisition systems and solid-state MAS probes.
Tecmag has been producing flexible, modular products for magnetic resonance for over 20 years.
With our larger modern manufacturing facility, Tecmag is able to serve our customers better.
www.tecmag.com   (54 words)

Try your search on: Qwika (all wikis)

  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.