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41.
Nonlinear Dynamics - Port Knocking is a method for authenticating clients through a closed stance firewall, and authorising their requested actions, enabling severs to offer services to... 相似文献
42.
L. Deák L. Bottyán R. Callens R. Coussement M. Major I. Serdons Y. Yoda 《Hyperfine Interactions》2006,167(1-3):709-715
The concept of the heterodyne/stroboscopic detection of nuclear resonance scattering of synchrotron radiation is extended to the grazing incidence geometry. Model calculations for an antiferromagnetic [57Fe/Cr]20 multilayer are shown and discussed. Principles and methodological aspects of stroboscopic synchrotron Mössbauer reflectometry are briefly reviewed. 相似文献
43.
E. Widmann W. Bauer S. Connell K. Maier J. Major A. Seeger H. Stoll F. Bosch 《Zeitschrift für Physik A Hadrons and Nuclei》1991,340(2):209-218
Motivated by the observation of energy- and momentum-correlatede + e ? pairs in heavy ion collisions, a search for resonances ine + e ? scattering at the corresponding energies has been made. Thee + e ? decay channel is analyzed in a time window from ~ 10?13 s to ~ 10?11 s with a set-up optimized for low-background detection of delayede + e ? decays. The two-photon decay channel of a hypothetical resonance is investigated by measuring the two-photon annihilation-in-flight excitation function. New upper limits for the partiale + e ? decay width Γee of a few meV are derived for total centre-of-mass energies √s between 1.78 and 1.92 MeV, taking into account the dilepton as well as the two-photon decay of a neutral resonance. 相似文献
44.
K. Bharuth‐Ram R. Scheuermann I.Z. Machi S.H. Connell J. Major J.P.F. Sellschop A. Seeger 《Hyperfine Interactions》1997,105(1-4):339-344
Transverse‐field μSR spectroscopy was used to study the behaviour of positive muons implanted in polycrystalline chemical‐vapour‐deposited
(CVD) diamond. Measurements were made at sample temperatures of 10 K, 100 K, and 300 K at a magnetic field of 7.5 mT to study
the behaviour of the “normal” (isotropic) muonium state (MuT) and the diamagnetic states (μd), and at 10 K and 300 K at the so‐called “magic field” of 407.25 mT to study the anomalous (bond‐centred) muonium state (MuBC) and μd. The absolute fractions of the muonium states in the CVD diamond are observed to be close to those in high‐quality natural
type‐IIa single crystal diamond.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
45.
Er:ZBLAN玻璃的一光束上转换立体显示的初步研究 总被引:5,自引:0,他引:5
本文研究了一光束上转换三维立体显示 ,所用材料为Er:ZBLAN氟化物玻璃 ;利用 96 6nm的连续波半导体激光研究了一光束上转换三维立体显示的尺寸效应 ,且得到了它的上转换发光谱 ;尤其是发现了基于 15 2 0nm的半导体激光激发的多光子上转换一光束三维立体显示的性能有大幅度提高 ,这在国际上还未见报道。 相似文献
46.
Julius Mandl k. u. k. Major des Geniestabes 《Monatshefte für Mathematik》1900,11(1):183-192
Ohne Zusammenfassung 相似文献
47.
P. Major 《Probability Theory and Related Fields》1988,78(3):419-435
Summary Let F
n
(u) denote the empirical distribution function of a sample of i.i.d. random variables with uniform distribution on [0, 1]. Define
, and consider the integrals
where f is a bounded measurable function. We give a good upper bound on the probability
. An analogous estimate is given for multiple integrals with respect to a Poisson process. 相似文献
48.
The presence of a surface chelate effect is established in the model system of Cu2+ adsorption on a self-assembled monolayer of 16-mercaptohexadecanoic acid (MHA) on Au. The formation constant of Cu2+ with the MHA surface was found to be 119 +/- 3.2 times greater than that of Cu2+ with succinic acid (HOOC-(CH2)2-COOH), and 213 +/- 4.0 times greater than that of Cu2+ with glutaric acid (HOOC-(CH2)3-COOH) in aqueous solutions. Both of these molecules are known to chelate to metal ions forming seven- and eight-membered rings. The greater surface chelate effect is attributed to the presence of the two-dimensional array of ligands on the surface. We believe the surface chelate effect demonstrated here is of general significance to adsorption on molecular surfaces and should depend strongly on chemical functionality and monolayer structure. 相似文献
49.
J. Major H. Schneider A. Seeger A. Siegle H. Stoll I. Billard M. Koch U. Lauff 《Journal of Radioanalytical and Nuclear Chemistry》1995,190(2):481-491
Correlated measurement of the lifetime and of the lineshape of the 511 keV annihilation radiation of positrons (age-momentum correlation, AMOC) has become a powerful tool for investigating reactions of positron or positronium in condensed matter as a function of time. The beam-based
+ AMOC method installed at the Stuttgart relativistic positron beam facility (E
kin
e+
4MeV) offers substantial advantages over the conventional E coincidence technique resulting in a fast data taking due to the unity detection efficiency of the
+ scintillator which provides the start signal for the lifetime measurement. In this paper the application of AMOC to positronium chemistry is illustrated by the study of spin conversion of positronium in the system methanol/HTEMPO as a function of HTEMPO (4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl, a paramagnetic solute) concentration. The same technique can be applied to other systems and other reactions in positronium chemistry, e. g., oxidation or complex formation. 相似文献
50.
Major H Castro-Perez J Nicholson JK Wilson ID 《Rapid communications in mass spectrometry : RCM》2003,17(1):76-80
The metabolic fate of 4-bromoaniline (4-BrA) was investigated following intraperitoneal administration to the rat at 50 mg kg(-1), using high-performance liquid chromatography/time-of-flight tandem mass spectrometry (HPLC/TOF-MS/MS). Up to five metabolites were detected in urine that correspond to isomeric pentose conjugates (possibly ribosides) of a hydroxysulphate of 4-BrA. This identification is supported by further studies where the water used in the reversed-phase solvent system was replaced with deuterated water in order to confirm that the number of exchangeable protons present in the metabolites was consistent with the proposed structures. 相似文献