Angular distributions of the polarized photons and electron in the decays of the 3D3^3D_3 state of charmonium

We calculate the combined angular distribution functions of the polarized photons ($\gamma_1$ and $\gamma_2$) and electron ($e^-$) produced in the cascade process $\bar{p}p\rightarrow$ $^3D_3\rightarrow$ $^3P_2+\gamma_1\rightarrow$ $(\psi+\gamma_2)+\gamma_1\rightarrow(e^++e^-)+\gamma_1+\gamma_2$, when the colliding $\bar{p}$ and $p$ are unpolarized. Our results are independent of any dynamical models and are expressed in terms of the spherical harmonics whose coefficients are functions of the angular-momentum helicity amplitudes of the individual processes. Once the joint angular distribution of ($\gamma_1$, $\gamma_2$) and that of ($\gamma_2$, $e^-$) with the polarization of either one of the two particles are measured, our results will enable one to determine the relative magnitudes as well as the relative phases of all the angular-momentum helicity amplitudes in the radiative decay processes $^3D_3\rightarrow$ $^3P_2+\gamma_1$ and $^3P_2\rightarrow\psi+\gamma_2$

Angular distributions in the radiative decays of the 3D3^3D_3 state of charmonium originating from polarized pˉp\bar{p}p collisions

Using the helicity formalism, we calculate the combined angular distribution function of the two gamma photons ($\gamma_1$ and $\gamma_2$) and the electron ($e^-$) in the triple cascade process $\bar{p}p\rightarrow{}^3D_3\rightarrow{}^3P_2+\gamma_1\rightarrow(\psi+\gamma_2) +\gamma_1 \rightarrow (e^- + e^+) +\gamma_2 +\gamma_1$, when $\bar{p}$ and $p$ are arbitrarily polarized. We also derive six different partially integrated angular distribution functions which give the angular distributions of one or two particles in the final state. Our results show that by measuring the two-particle angular distribution of $\gamma_1$ and $\gamma_2$ and that of $\gamma_2$ and $e^-$, one can determine the relative magnitudes as well as the relative phases of all the helicity amplitudes in the two charmonium radiative transitions ${}^3D_3\rightarrow{}^3P_2+\gamma_1$ and $^3P_2\rightarrow \psi+\gamma_2$.Comment: arXiv admin note: substantial text overlap with arXiv:1311.464

Cytoplasmic signaling involved in sonoporation-induced apoptosis andmitosis repression of myeloid leukemia cells

Sonoporation is known to be a transient phenomenon that may disrupt thehomeostasis of living cells. In this work, we showed that sonoporation may beartime-lapse impact on cellular viability through up-regulation of cytoplasmicsignaling proteins related to apoptosis and cell-cycle arrest. Our experimentswere done on HL-60 leukemia cells (10 6 cells/ml), and sonoporationwas induced via the use of 1% v/v microbubbles and 1-min. pulsed ultrasoundexposure (0.5MPa peak negative pressure, 1MHz center frequency, 10% duty cycle,1 kHz pulse repetition frequency). The transient nature of sonoporation in thesecells was confirmed by performing scanning electron microscopy on selected cellsamples that were fixed respectively after a few seconds into the ultrasoundexposure and one minute after the end of exposure. Cytoplasmic signaling changesof these cells were studied at four post-sonoporation time points (4h, 8h, 12h,24h) using western blot analysis. Five signaling proteins related to apoptosisand mitosis were analyzed in this work: 1) PARP (for DNA repair); 2)cleaved-PARP (fragments due to cleavage by pro-apoptotic caspase proteins); 3)Bcl-2 (inhibitor for mitochrondrial release of pro-apoptotic molecules); 4) Bax(complement of Bcl-2); 5) Cdc-2 (regulator for cell mitosis). Three key resultswere found from the cytoplasmic signaling analysis. First, PARP levels werereduced over the monitoring period whilst cleaved-PARP had increased inexpression, and in turn they indicate that the cells' anti-apoptotic responseswere dampened following sonoporation and pro-apoptotic caspase proteins werelikely activated. Second, drop in Bcl-2 and rise in Bax were observed, and thesesuggest that the mitochondrion was involved in apoptotic signal transductioninside sonoporated cells. Third, Cdc-2 was seen to decrease, implying thatmitosis was repressed in sonoporated cells. © 2010 IEEE.published_or_final_versionThe 2010 IEEE International Ultrasonics Symposium, San Diego, CA., 11-14 October 2010. In Proceedings of IEEE IUS, 2010, p. 1771-177

Nondestructive Measurement of Orbital Angular Momentum for an Electron Beam

Free electrons with a helical phase front, referred to as "twisted" electrons, possess an orbital angular momentum (OAM) and, hence, a quantized magnetic dipole moment along their propagation direction. This intrinsic magnetic moment can be used to probe material properties. Twisted electrons thus have numerous potential applications in materials science. Measuring this quantity often relies on a series of projective measurements that subsequently change the OAM carried by the electrons. In this Letter, we propose a nondestructive way of measuring an electron beam's OAM through the interaction of this associated magnetic dipole with a conductive loop. Such an interaction results in the generation of induced currents within the loop, which are found to be directly proportional to the electron's OAM value. Moreover, the electron experiences no OAM variations and only minimal energy losses upon the measurement, and, hence, the nondestructive nature of the proposed technique.Comment: 5 pages, 3 figures, and supplemental material that is comprised of text and 4 figure

Children's Use of Electronic Games: Choices of Game Mode and Challenge Levels

Introduction. Interactive electronic games are popular and are believed to contribute to physical activity accrual. The purpose of this study was to examine children's electronic game use during conditions in which they had free access to selecting interactive and seated screen-based versions of electronic games and during the interactive versions had free choice in making adjustments to the activity intensity. Methods. We systematically observed 60 Hong Kong primary school children during two 60-minute game sessions while simultaneously recording their game mode choices and physical activity levels using SOFIT (System for Observing Fitness Instruction Time). Results. When given free choice, children spent more than half of their available time participating in interactive versions of games. These versions of games provided significantly more moderate-to-vigorous physical activity and greater energy expenditure than the computer screen versions. Children with the opportunity to modify intensity levels spent more time playing the interactive versions and accrued more physical activity. Conclusions. The tenets of behavioral choice theory were supported. Access to new-generation interactive games, particularly those with modifiable intensity levels, may facilitate children's participation in physical activity

PERTUMBUHAN DAN TINGKAT MORBIDITAS PADA BAYI USIA 7-12 BULAN BERDASARKAN STATUS PEMBERIAN ASI DI WILAYAH PUSKESMAS GILINGAN KECAMATAN BANJARSARI SURAKARTA

Introduction: Breastfeeding is the best food for infants, especially in their early life. Breastfeeding can assist the growth process and also protect infants from various infectious diseases such as Diarrhea and Acute Respiratory Infection (ARI). Objective: To determine the effect of breastfeeding status on growth and morbidity in infants aged 7-12 months at the Primary Health Service Gilingan. Methods: This study used a retrospective cohort study design, conducted in April 2015, at the integrated service center in Primary Health Service Gilingan. The total sample in this study were 58 respondents, the sampling method used was Consecutive Sampling. The research instruments were a questionnaire of exclusive breastfeeding, morbidity and KMS (Health Care Card). Analysis Techniques used Chi Square test. Results: The research found that there are no effect of breastfeeding status on the growth of infants aged 7-12 months with the value of p = 0.378 RR 1.667 (95% CI = 0.697 to 3.984). There are no effect of the status of breastfeeding on the incidence of Acute Respiratory Infection (ARI) in infants aged 7-12 months with the value of p = 0.066 RR 1.800 (95% CI = 1.011 to 3.204). There are no effect of breastfeeding status on the incidence of diarrhea in infants aged 7-12 months with the value of p = 0.564 RR 1.158 (95% CI = 0.829 to 1.618). Conclusion: Breastfeeding status has no effect on the growth of babies, incidence of ARI and diarrhea in infants aged 7-12 months at the Primary Health Service Gilingan Banjarsari Surakarta

Reliability and validity of the IPAQ-L in a sample of Hong Kong Urban older adults: does neighborhood of residence matter?

This study examined reliability and validity of the Chinese version of the International Physical Activity Questionnaire–Long Form (IPAQ-LC) in Chinese seniors, including moderating effects of neighborhood walkability and socioeconomic status (SES) on reliability and validity. The IPAQ-LC was interviewer-administered (n = 96), accelerometer and 7-day walk-diary data were collected (n = 94), and the IPAC-LC was readministered (N = 92). Acceptable reliability was found for all measures of physical activity (PA) overall and across different types of neighborhood. Participants from highly walkable neighborhoods were more reliable at estimating walking for transport. Participants from low-SES areas were less reliable at estimating leisure-time PA and sitting but more reliable at estimating transport-related walking. IPAQ-LC walking was significantly related to light- but not moderate-intensity accelerometry-based PA. It was moderately to strongly related to a 7-day diary of walking. The data imply slow-paced walking, probably due to age, climate, and terrain. The findings suggest that the IPAQ-LC’s reliability and validity are acceptable in Chinese seniors

GEAR: A GPU-Centric Experience Replay System for Large Reinforcement Learning Models

This paper introduces a distributed, GPU-centric experience replay system, GEAR, designed to perform scalable reinforcement learning (RL) with large sequence models (such as transformers). With such models, existing systems such as Reverb face considerable bottlenecks in memory, computation, and communication. GEAR, however, optimizes memory efficiency by enabling the memory resources on GPU servers (including host memory and device memory) to manage trajectory data. Furthermore, it facilitates decentralized GPU devices to expedite various trajectory selection strategies, circumventing computational bottlenecks. GEAR is equipped with GPU kernels capable of collecting trajectories using zero-copy access to host memory, along with remote-directed-memory access over InfiniBand, improving communication efficiency. Cluster experiments have shown that GEAR can achieve performance levels up to 6× greater than Reverb when training state-of-the-art large RL models. GEAR is open-sourced at https://github.com/bigrl-team/gear