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Takashi Abe(Takashi Abe ),Jeremy P. Loenneke(Jeremy P. Loenneke ) 사피엔시아 2021 Exercise Medicine Vol.5 No.-
Objectives: To maintain proper development, it is recommended that children/adolescents focus more on increasing physical activity than dietary restriction when treating obesity. In other words, adults are better able to tolerate the reductions in fat-free body mass that often occur when trying to lose fat mass. In contrast, children and adolescents should avoid losses in fat-free mass in order to ensure proper development. Therefore, when trying to reduce visceral fat in children via a negative energy balance (i.e., exercise with or without calorie restriction), it is necessary to set desirable conditions in order to minimize the loss of fat-free mass. To determine whether this is possible, we reviewed literature discussing the relationship between changes in visceral fat obtained by abdominal imaging and changes in total body fat and fat-free mass after exercise training with and without calorie restriction in children and adolescents. Methods: Literature review. Results and Conclusions: Previous work found no reduction in fat-free mass in the exercise interventions in which there was no dietary-induced calorie restriction. This supports the idea that reducing visceral fat by increasing physical activity is the preferred strategy over dietary restriction in children and adolescents. Although factors such as the type (e.g. aerobic and/or resistance) of exercise and the amount (i.e. energy expenditure) of exercise will likely have an effect on the magnitude of change in intra-abdominal visceral fat, the quantity of each that is needed without reducing fat-free mass is currently unknown.
Ahmed K. Abed,Riyadh Mansoor,Ali K. Abed 한국통신학회 2022 ICT Express Vol.8 No.1
Orthogonal Frequency Division Multiplexing (OFDM) is the best choice for wireless and wired high data rate communications. The OFDM system has many advantages such as high spectral efficiency, robustness to channel fading, and immunity to impulse interference. However, it has a main drawback, which is the Peak to Average Power Ratio (PAPR). Selecting Mapping (SLM) and Partial Transmit Sequences (PTS) are the two essential techniques for reducing the PAPR; however, they need to send side information to indicate how the transmitter generates signals. In this paper, Particle Swarm Optimization (PSO)-based dummy sub-carriers are inserted with the data to reduce PAPR without transmitting side information. The incorporation of PSO-based Dummy Sub-carriers Insertion (DSI) method on this system is performed by measuring the PAPR at the IFFT output (Inverse Fast Fourier Transform) after adding 6 adaptive sub-carrier sequences to the input data of IFFT. The PSO-based dummy algorithm decides to send the data once the PAPR of this data sequence and dummy sub-carrier is under a specific threshold. Using MATLAB as a mathematical simulation tool, simulation results are presented for a standard OFDM network model. The network model has been simulated in an Additive White Gaussian Noise (AWGN) channel environment to investigate PAPR and Bit-Error Rate (BER) performance. The simulation results show that the dummy sequence based on PSO reduces PAPR down to 4 dB compared to a conventional OFDM system and down to 3 dB compared with the clipping technique for the same BER performance.
Chang, P.,Abe, K.,Abe, K.,Abe, T.,Aihara, H.,Asano, Y.,Aulchenko, V.,Aushev, T.,Aziz, T.,Bahinipati, S.,Bakich, A.M.,Ban, Y.,Bay, A.,Bedny, I.,Bitenc, U.,Bizjak, I.,Bondar, A.,Bozek, A.,Brač,ko, Elsevier 2004 Physics letters: B Vol.599 No.3
<P><B>Abstract</B></P><P>We report the observation of <SUP>B0</SUP> decays to the <SUP>K+</SUP><SUP>π−</SUP><SUP>π0</SUP> final state using a data sample of 78 fb<SUP>−1</SUP> collected by the Belle detector at the KEKB <SUP>e+</SUP><SUP>e−</SUP> collider. With no assumptions about intermediate states in the decay, the branching fraction is measured to be (36.6−4.3+4.2±3.0)×<SUP>10−6</SUP>. We also search for <I>B</I> decays to intermediate two-body states with the same <SUP>K+</SUP><SUP>π−</SUP><SUP>π0</SUP> final state. Significant <I>B</I> signals are observed in the ρ<SUP>(770)−</SUP><SUP>K+</SUP> and <SUP>K*</SUP><SUP>(892)+</SUP><SUP>π−</SUP> channels, with branching fractions of (15.1−3.3−1.5−2.1+3.4+1.4+2.0)×<SUP>10−6</SUP> and (14.8−4.4−1.0−0.9+4.6+1.5+2.4)×<SUP>10−6</SUP>, respectively. The first error is statistical, the second is systematic and the third is due to the largest possible interference. Contributions from other possible two-body states will be discussed. No <I>CP</I> asymmetry is found in the inclusive <SUP>K+</SUP><SUP>π−</SUP><SUP>π0</SUP> or <SUP>ρ−</SUP><SUP>K+</SUP> modes, and we set 90% confidence level bounds on the asymmetry of −0.12<<SUB>ACP</SUB><0.26 and −0.18<<SUB>ACP</SUB><0.64, respectively.</P>
Wang, M.-Z.,Abe, K.,Abe, K.,Abe, T.,Adachi, I.,Aihara, H.,Asano, Y.,Aso, T.,Aulchenko, V.,Aushev, T.,Bakich, A. M.,Bay, A.,Bizjak, I.,Bondar, A.,Bozek, A.,Brač,ko, M.,Browder, T. E.,Chang, M.-C. American Physical Society 2004 Physical Review Letters Vol.92 No.13
<P>We report the first observation of a b-->u type charmless baryonic B decay, B+-->pppi(+), as well as b-->s type B0-->ppK0 and B+-->ppK(*+) decays. The analysis is based on a 78 fb(-1) data sample recorded on the Upsilon(4S) resonance with the Belle detector at KEKB. We find B(B+-->pppi(+))=(3.06(+0.73)(-0.62)+/-0.37)x10(-6), B(B0-->ppK0)=(1.88(+0.77)(-0.60)+/-0.23)x10(-6), and B(B+-->ppK(*+))=(10.3(+3.6+1.3)(-2.8-1.7))x10(-6). We also update B(B+-->ppK+)=(5.66(+0.67)(-0.57)+/-0.62)x10(-6) and present an upper limit on B(B0-->ppK(*0)) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.</P>
Large-eddy simulation on gas mixing induced by the high-buoyancy flow in the CIGMAfacility
Abe Satoshi,Sibamoto Yasuteru 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.5
The hydrogen behavior in a nuclear containment vessel is a significant issue when discussing the potential of hydrogen combustion during a severe accident. After the Fukushima-Daiichi accident in Japan, we have investigated in-depth the hydrogen transport mechanisms by utilizing experimental and numerical approaches. Computational fluid dynamics is a powerful tool for better understanding the transport behavior of gas mixtures, including hydrogen. This paper describes a Large-eddy simulation of gas mixing driven by a high-buoyancy flow. We focused on the interaction behavior of heat and mass transfers driven by the horizontal high-buoyant flow during density stratification. For validation, the experimental data of the Containment InteGral effects Measurement Apparatus (CIGMA) facility were used. With a high-power heater for the gas-injection line in the CIGMA facility, a high-temperature flow of approximately 390 C was injected into the test vessel. By using the CIGMA facility, we can extend the experimental data to the high-temperature region. The phenomenological discussion in this paper helps understand the heat and mass transfer induced by the high-buoyancy flow in the containment vessel during a severe accident.
Abe, K.,Bronner, C.,Pronost, G.,Hayato, Y.,Ikeda, M.,Iyogi, K.,Kameda, J.,Kato, Y.,Kishimoto, Y.,Marti, Ll.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakano, Y.,Nakayama, S.,Okajima, Y.,Orii, A.,Sekiya, H. American Physical Society 2017 Physical Review D Vol.96 No.1
<P>We have searched for proton decays into a charged antilepton (e(+), mu(+)) plus a meson (eta, rho(0), omega) and for neutron decays into a charged antilepton (e(+), mu(+)) plus a meson (pi(-), rho(-)) using Super-Kamiokande I-IV data, corresponding to 0.316 megaton . years of exposure. This measurement updates the previous published result by using 2.26 times more data and improved analysis methods. No significant evidence for nucleon decay is observed and lower limits on the partial lifetime of the nucleon are obtained. The limits range from 3 x 10(31) to 1 x 10(34) years at 90% confidence level, depending on the decay mode.</P>