17,189 research outputs found
Parity-violating coupling constant from the flavor-conserving effective weak chiral Lagrangian
We investigate the parity-violating pion-nucleon-nucleon coupling constant
, based on the chiral quark-soliton model. We employ an effective
weak Hamiltonian that takes into account the next-to-leading order corrections
from QCD to the weak interactions at the quark level. Using the gradient
expansion, we derive the leading-order effective weak chiral Lagrangian with
the low-energy constants determined. The effective weak chiral Lagrangian is
incorporated in the chiral quark-soliton model to calculate the
parity-violating constant . We obtain a value of about
at the leading order. The corrections from the next-to-leading order
reduce the leading order result by about 20~\%.Comment: 12 page
Outage-based ergodic link adaptation for fading channels with delayed CSIT
Link adaptation in which the transmission data rate is dynamically adjusted
according to channel variation is often used to deal with time-varying nature
of wireless channel. When channel state information at the transmitter (CSIT)
is delayed by more than channel coherence time due to feedback delay, however,
the effect of link adaptation can possibly be taken away if this delay is not
taken into account. One way to deal with such delay is to predict current
channel quality given available observation, but this would inevitably result
in prediction error. In this paper, an algorithm with different view point is
proposed. By using conditional cdf of current channel given observation, outage
probability can be computed for each value of transmission rate . By
assuming that the transmission block error rate (BLER) is dominated by outage
probability, the expected throughput can also be computed, and can be
determined to maximize it. The proposed scheme is designed to be optimal if
channel has ergodicity, and it is shown to considerably outperform conventional
schemes in certain Rayleigh fading channel model
Diversity at work matters in times of violent ethnic conflicts
Perceptions that colleagues prefer to work with ethnically similar others can be detrimental to the organisation, especially in regions marred by violence and adversity. Hyun-Jung Lee draws on her research from Sri Lanka to highlight that the level of ethnic diversity in workgroups matters as increasing the opportunities for positive contact can prove beneficial for a given organisation, as well as society more broadly
How can firms manage multi-ethnic workforces in countries with violent ethnic conflicts?
Perceptions of ethnic homophily among colleagues can be detrimental to the firm, writes Hyun-Jung Le
Rocky Road: East Asian International Students‟ Experience of Adaptation to Critical Thinking Way of Learning at U.S. Universities
This roundtable seeks to understand how Confucius-influenced East Asian international students learn to adapt to and participate in the countervailing Western pedagogy that fosters independent critical thinking and reflection and how these Asian students reconcile these seeming polarities as they engage in their doctoral studies at U.S. universities
Coexisting
This thesis describes the artist\u27s sculpture and jewelry/wall composition, which uses figurative forms representing simplified and exaggerated parts of the human body. The author describes how this artwork expresses the themes of community and coexistence in the human condition
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