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A NOTE ON NONSINGULAR CYCLIC UNIVERSES IN THE DEFORMED HOŘAVA-LIFSHITZ GRAVITY
SON, EDWIN J.,KIM, WONTAE World Scientific 2011 Modern physics letters A Vol.26 No.10
<P> We perform the phase space analysis in terms of the linearization technique in the Hořava-Lifshitz gravity with the softly broken detailed balance condition. It can be shown that the bouncing universe appears only for the positive spatial curvature of k = +1, and it is possible to obtain oscillating universe with the help of the negative dark radiation and the negative cosmological constant. </P>
Note on uncertainty relations in doubly special relativity and gravity’s rainbow
Son, Edwin J.,Kim, Wontae World Scientific 2015 Modern Physics Letters A Vol.30 No.33
<P> We present commutation relations depending on the rainbow functions which are slightly different from the well-known results. However, the advantage of these new commutation relations are compatible with the calculation of the Hawking temperature in the rainbow Schwarzschild black hole. </P>
NOTE ON TWO-DIMENSIONAL GAUGED LIFSHITZ MODELS
SON, EDWIN J.,KIM, WONTAE World Scientific 2011 Modern Physics Letters A Vol.26 No.37
<P> We fermionize the two-dimensional free Lifshitz scalar field in order to identify what the gauge-covariant couplings are, and then they are bosonized back to get the gauged Lifshitz scalar field theories. We show that they give the same physical modes with those of the corresponding Lorentz invariant gauged scalar theories, although the dispersion relations are different. </P>
Time series anomaly detection for gravitational-wave detectors based on the Hilbert–Huang transform
Son Edwin J.,Kim Whansun,Kim Young-Min,McIver Jessica,Oh John J.,Oh Sang Hoon 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.78 No.10
We present a new event trigger generator based on the Hilbert–Huang transform, named EtaGen (ηGen). It decomposes time-series data into several adaptive modes without imposing a priori bases on the data. The adaptive modes are used to find transients (excesses) in the background noises. A clustering algorithm is used to gather excesses corresponding to a single event and to reconstruct its waveform. The performance of EtaGen is evaluated by how many injections are found in the LIGO simulated data. EtaGen is viable as an event trigger generator when compared directly with the performance of Omicron, which is currently the best event trigger generator used in the LIGO Scientific Collaboration and Virgo Collaboration.