While recent developments in electroencephalogram (EEG)-based brain-computer interfaces (BCIs) have enabled a bridge between the brain and external devices with relatively high communication speed, ...there is still room for improvement. Notably, the phenomenon of “BCI illiteracy,” which refers to the 15%–30% of people who struggle to type or control devices using BCI, remains unsolved, limiting the practical application of BCI systems. The EEG-based BCIs performance is constrained by the low-quality scalp EEG signals due to the attenuation and distortion of the skull. To address these limitations, this study proposes a hybrid BCI system combining EEG with magnetoencephalogram (MEG), a neuroimaging technology not influenced by the volume conduction effect, to boost BCI performance by enhancing signal quality. Comparative experiments involving 22 subjects showed that the steady-state visual evoked response (SSVER) from MEG has a wider range of effective bandwidth and higher signal-to-noise ratio than EEG. Moreover, differences in the spectral and spatiotemporal characteristics of MEG and EEG explain better performance. Simultaneous MEG-EEG recording experiments suggested that the hybrid MEG-EEG BCI achieved a significantly higher information transfer rate than either modality alone (hybrid: 312 ± 17 bits/min, MEG: 272 ± 17 bits/min, EEG: 240 ± 27 bits/min). Moreover, the 40-target classification accuracy of “BCI illiterate” increased from 50% to 95% with the help of MEG. These results highlight the methodological advantages of a hybrid MEG-EEG BCI, suggesting a promising paradigm for implementing high-speed BCIs.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
The asymmetry of D- and D+ meson production in π-N scattering observed by the E791 experiment is a phenomenon typical for what is known as the leading particle effect in charm hadroproduction. We ...show that the phenomenon can be explained by the effect of light quark fragmentation into charmed hadrons (LQF). Meanwhile, the size of the LQF effect is estimated from the data of the E791 experiment. A comparison is made with the estimate of the LQF effect from the prompt like-sign dimuon rate in neutrino experiments. The influence of the LQF effect on the measurement of the nucleon strange distribution asymmetry from charged current charm production processes is briefly discussed.
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DOBA, FZAB, GEOZS, IJS, IMTLJ, IZUM, KILJ, KISLJ, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
The Crystal Ball Collaboration has recently reported the differential cross sections and
Λ polarization for the reaction
K
−
p
→
π
0
Λ
using an incident
K
−
beam with momenta between 514 and 750 MeV/
...c. We make an analysis for this process with an effective Lagrangian approach and study the properties of some
Σ resonances around this energy range. With the inclusion of the 4-star resonances
Σ
(
1189
)
,
Σ
⁎
(
1385
)
,
Σ
(
1670
)
3
2
−
,
Σ
(
1775
)
5
2
−
, as well as a
Σ
(
1635
)
1
2
+
, which is compatible with the 3-star
Σ
(
1660
)
1
2
+
in PDG, our results can well reproduce the experimental data. The parameters on the
Σ resonances and related couplings are studied.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
In order to know more about some capital sigma resonances and distinguish various models of hadron structures, an analysis is performed for the reactions K super(-) n arrow right pi super(-) Lambda ...and K super(-) p arrow right pi super(0) Lambda , using an effective Lagrangian approach. The differential cross sections and Lambda polarizations from two experiments are analyzed with the c.m. energy between 1,550 and 1,676 MeV. Our study strongly support the existence of a J capital pi = {1\over 2} registered \Sigma} resonance with mass near 1,633 MeV and width about 120 MeV, which is compatible with the three-star {\Sigma(1660){1\over 2} registered } in PDG. Meanwhile, no evidence is found for the two-star {\Sigma(1620){1\over 2} approximately } listed in PDG.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) Issue Title: FB20 Proceedings In order to know more about some Sigma resonances and distinguish various models of hadron ...structures, an analysis is performed for the reactions K ^sup -^ n arrow right pi ^sup -^ Lambda and K ^sup -^ p arrow right pi ^sup 0^ Lambda, using an effective Lagrangian approach. The differential cross sections and Lambda polarizations from two experiments are analyzed with the c.m. energy between 1,550 and 1,676 MeV. Our study strongly support the existence of a ... resonance with mass near 1,633 MeV and width about 120 MeV, which is compatible with the three-star ... in PDG. Meanwhile, no evidence is found for the two-star ... listed in PDG.PUBLICATION ABSTRACT
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
In order to know more about some Σ resonances and distinguish various models of hadron structures, an analysis is performed for the reactions
K
−
n
→
π
−
Λ
and
K
−
p
→
π
0
Λ
, using an effective ...Lagrangian approach. The differential cross sections and
Λ
polarizations from two experiments are analyzed with the c.m. energy between 1,550 and 1,676 MeV. Our study strongly support the existence of a
resonance with mass near 1,633 MeV and width about 120 MeV, which is compatible with the three-star
in PDG. Meanwhile, no evidence is found for the two-star
listed in PDG.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Experimentally, the production of oppositely charged dimuon events by neutrino and antineutrino deep inelastic scattering (DIS) is used to determine the strangeness asymmetry inside a nucleon. Here ...we point out that the direct production of a
D
-meson in DIS may have a substantial influence on the measurement of nucleon strangeness distributions. Direct
D
-meson production is via heavy quark recombination (HQR) and via light-quark fragmentation from perturbative QCD (LQF-P). To see the influence precisely, we compute the direct
D
-meson productions via HQR and LQF-P quantitatively and estimate their corrections to the analysis of the strangeness asymmetry. The results show that HQR has a stronger effect than LQF-P does, and the former may influence the experimental determination of the nucleon strangeness asymmetry.
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DOBA, FZAB, GEOZS, IJS, IMTLJ, IZUM, KILJ, KISLJ, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
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