Results 351 to 360 of about 13,047,142 (383)

Proton-electron mass ratio and the electron's "Atomic Mass"

IEEE Transactions on Instrumentation and Measurement, 1995
The UW Penning trap mass spectrometer has been used to improve the values for the electron's atomic mass and the proton-electron mass ratio. The cyclotron frequency of small clouds of /spl les/15 electrons is compared with the cyclotron frequency of a single trapped carbon ion (C/sup 6+/) in order to determine their relative mass ratio.
R.S. Van Dyck, D.L. Farnham, P.B. Schwinberg   +2 more
openaire   +1 more source

Periodic orbits near ?4 for mass ratios near the critical mass ratio of routh

Celestial Mechanics, 1971
The Hamiltonian for orbits near ℒ4 and mass ratios near μ1 is brought into a normal form. A theorem shows that two coefficients in this expansion predict the behavior of the periodic orbits.
Meyer, K. R., Schmidt, D. S.
openaire   +2 more sources

Masses and Mass-To-Light Ratios of Galaxies

Annual Review of Astronomy and Astrophysics, 1979
Is there more to a galaxy than meets the eye (or can be seen on a photo­ graph)? Many decades ago, Zwicky (1933) and Smith (1936) showed that if the Virgo cluster of galaxies is bound, the total mass must considerably exceed the sum of the masses of the individual member galaxies; i.e. there appeared to be "missing mass" in the cluster.
S. M. Faber, J. S. Gallagher
openaire   +1 more source

Effect of oil–paper–pressboard mass ratio on furfural content in transformer oil

IEEE transactions on dielectrics and electrical insulation, 2019
Furfural content in oil is widely accepted as an effective parameter to mirror aging of insulation paper. However, pressboards are also abundant in transformers, which are always neglected in furfural analysis.
Dawei Feng, Lijun Yang, Luowei Zhou, R. Liao, Xin Chen   +4 more
semanticscholar   +1 more source

Mass-Ratio and Masses. Harmonic Relation

1981
(a) Fractional mass, mass-ratio. Harmonic relation. The fractional mass B = ℳB/(ℳA + ℳB), and hence the mass ratio ℳB/ℳA are thus obtained from observational material covering sufficient orbital motion (curvature), to separate it from the proper motion and if necessary from the quadratic time effect of the barycenter.
openaire   +1 more source

Quark-lepton mass ratio in technicolor

Physical Review Letters, 1988
QCD corrections may substantially enhance a techniquark condensate relative to a technilepton condensate when the technicolor ..beta.. function is small. This enhancement factor appears in quark-lepton mass ratios. There is much less enhancement of the techniquark-technilepton mass ratio.
openaire   +2 more sources

A 16-parts-per-trillion measurement of the antiproton-to-proton charge–mass ratio

Nature, 2022
M. Borchert, J. Devlin, S. Erlewein, M. Fleck, J. Harrington, Takashi Higuchi, B. Latacz, F. Voelksen, E. Wursten, F. Abbass, M. Bohman, A. Mooser, D. Popper, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, C. Smorra, S. Ulmer   +22 more
semanticscholar   +1 more source

Mass Ratio Spectroscopy and the Proton’s Atomic Mass

1989
The traditional compensated Penning trap has been used in the past to precisely measure mass ratios of positrons[1] and protons[2] relative to the electron. Present investigations may allow one to indirectly determine the neutron/proton mass ratio as well as the 3 H — 3 He mass difference to sub-ppb precision.
R. S. Van Dyck, F. L. Moore, D. L. Farnham, P. B. Schwinberg   +3 more
openaire   +1 more source

Muon–Electron Mass Ratio

We define the muon-to-electron mass ratio R_{m/e} in a compact N-style form as:R_{m/e} » [641 · (3 · 2^{10} - 1)]^{1/e}
openaire   +1 more source

Cancer statistics for the US Hispanic/Latino population, 2021

Ca-A Cancer Journal for Clinicians, 2021
Kimberly D Miller, Paulo S Pinheiro, Priti Bandi   +2 more
exaly