Branching ratios and direct CP asymmetries in D→PVD\to PV decays

We study the two-body hadronic $D\to PV$ decays, where $P$ ($V$) denotes a pseudoscalar (vector) meson, in the factorization-assisted topological-amplitude approach proposed in our previous work. This approach is based on the factorization of short-distance and long-distance dynamics into Wilson coefficients and hadronic matrix elements of four-fermion operators, respectively, with the latter being parametrized in terms of several nonperturbative quantities. We further take into account the $\rho$-$\omega$ mixing effect, which improves the global fit to the branching ratios involving the $\rho^0$ and $\omega$ mesons. Combining short-distance dynamics associated with penguin operators and the hadronic parameters determined from the global fit to branching ratios, we predict direct $CP$ asymmetries. In particular, the direct $CP$ asymmetries in the $D^0\to K^0\overline{K}^{*0},~\overline{K}^0K^{*0}$, $D^+\to\pi^+\rho^0$, and $D_s^+\to K^+\omega,~K^+\phi$ decays are found to be of ${\cal O}(10^{-3})$, which can be observed at the LHCb or future Belle II experiment. We also predict the $CP$ asymmetry observables of some neutral $D$ meson decays.Comment: 16 pages, 2 figure

A conceptual framework for interactive virtual storytelling

This paper presents a framework of an interactive storytelling system. It can integrate five components: management centre, evaluation centre, intelligent virtual agent, intelligent virtual environment, and users, making possible interactive solutions where the communication among these components is conducted in a rational and intelligent way. Environment plays an important role in providing heuristic information for agents through communicating with the management centre. The main idea is based on the principle of heuristic guiding of the behaviour of intelligent agents for guaranteeing the unexpectedness and consistent themes

A study of dynamical processes in the Orion KL region using ALMA-- Probing molecular outflow and inflow

This work reports a high spatial resolution observations toward Orion KL region with high critical density lines of CH$_{3}$CN (12$_{4}$-11$_{4}$) and CH$_{3}$OH (8$_{-1, 8}$-7$_{0, 7}$) as well as continuum at $\sim$1.3 mm band. The observations were made using the Atacama Large Millimeter/Submillimeter Array with a spatial resolution of $\sim$1.5$^{\prime\prime}$ and sensitives about 0.07 K and $\sim$0.18 K for continuum and line, respectively. The observational results showed that the gas in the Orion KL region consists of jet-propelled cores at the ridge and dense cores at east and south of the region, shaped like a wedge ring. The outflow has multiple lobes, which may originate from an explosive ejection and is not driven by young stellar objects. Four infrared bubbles were found in the Spitzer/IRAC emissions. These bubbles, the distributions of the previously found H$_2$ jets, the young stellar objects and molecular gas suggested that BN is the explosive center. The burst time was estimated to be $\leq$ 1300 years. In the mean time, signatures of gravitational collapse toward Source I and hot core were detected with material infall velocities of 1.5 km~s$^{-1}$ and $\sim$ 0.6 km~s$^{-1}$, corresponding to mass accretion rates of 1.2$\times$10$^{-3}$M_{\sun}/Yr and 8.0$\times$10$^{-5}$M_{\sun}/Yr, respectively. These observations may support that high-mass stars form via accretion model, like their low-mass counterparts.Comment: Accepted to Ap

Hybrid approximations via second order combined dynamic derivatives on time scales

This article focuses on the approximation of conventional second order derivative via the combined (diamond-$\alpha$) dynamic derivative on time scales with necessary smoothness conditions embedded. We will show the constraints under which the second order dynamic derivative provides a consistent approximation to the conventional second derivative; the cases where the dynamic derivative approximates the derivative only via a proper modification of the existing formula; and the situations in which the dynamic derivative can never approximate consistently even with the help of available structure correction methods. Constructive error analysis will be given via asymptotic expansions for practical hybrid modeling and computational applications

Toni Morrison’s Gender Politics in Song of Solomon

Racial and gender oppression are always of Toni Morrison’s great concern. She uses her pen to create fictions and non-fiction essays to fight for her fellow African American people. As a black female who enjoys the discourse power, she waves her gender politics into the great novel Song of Solomon. Key words: Toni Morrison; Gender politics; Song of SolomonRésumé: L’oppression raciale and l’oppression des femmes sont toujours les deux thèmes préoccupants de Toni Morrison. Elle utilise sa plume pour créer des fictions et des essais non-fiction afin de se battre pour ses compatriotes afro-américaines. En tant qu’une femme noire qui aime le pouvoir du discours, elle brandit sa politique de genre dans le grand roman Le chant de Salomon. Mots clés: Toni Morrison; Politique de genre; Chant de Salomo

Criticism of Modernity in Freeman’s A Poetess

Mary Eleanor Wilkins Freeman was a remarkable American writer who flourished for decades at the turn of the 18th and the 19th centuries. She was well-known for regionalism, for she set most of her stories against the New England area where she was born. As a penetrating writer, Freeman endowed her works with profound observations of life that go beyond the confines of local colorism, which enables readers to explore new components at different times. A poetess has long been taken as a sample of feminism since the theory achieved the greatest popularity in the 1960s. As a piece of great literary works is open to diverse interpretations, A poetess, in the light of Modernity Criticism, demonstrates Freeman’s concerns for the modern development of human society and the adversities that go side by side with the process. Centering on the characterization of Betsy Dole as well as Mrs. Caxton, the minister, and the printer, the article aims at revealing the writer’s contemplations on modernity in the short story. Key words: A Poetess; Modernity; Betsy Dol