A Time Evolution Study of the Superhumps of the Dwarf Nova 1RXS J232953.9+062814 by Wavelet Transform

The time evolution behaviour of the superhumps of the dwarf nova 1RXS J232953.9+062814 is investigated with the wavelet analysis method. On the basis of two nights CCD photometry performed during its first superoutburst as well as other published brightness data, we reveal the superhump's time-dependence as a function of periods and time. Our light curves, which phased in the rapid decay ending portion of the superoutburst and in the dawn of a following normal outburst, are important to help trace the superhump evolution for the star. Evident amplitude variations of the superhumps, reflecting the fading of outbursts, are detected. The general profile of brightness fading over the outbursts roughly followed an exponential decay law or a form of a five-order polynomial. Both the superhump period and the orbital period of the binary system are detected in the present data. We obtain P_sh=0.04575(5) d and P_orb=0.04496(5) d. They agree with the existing values based on additional data. The two periods exchanged their roles during the superhump evolution.Comment: 7 pages, 9 figures, submitted to Astronomy & Astrophysic

Pacifying the dragon? How expatriate media professionals are gatekeeping in the Chinese media system

China is currently characterized as having a censored media system, which poses challenges to expatriates (expats) who work within the Chinese media system. This study analyzes the motivations for expats to work in China through a gatekeeping lens. Through in-depth interviews of expat media professionals, themes of limited acculturation emerge, as well as few opportunities for input during gatekeeping processes related to hard news, but there are more opportunities for input in the production of business news, entertainment, and lifestyle programming. Although content is restricted, participants laterally influence their colleagues by mentoring them based on individual-level forces such as professional values and education. Censorship is accepted by expats as unchangeable. Social system forces become more manifest instead of being implici

The effectiveness of shared care in cancer survivors - a systematic review

Objectives: To determine whether the shared care model during the follow-up of cancer survivors is effective in terms of patient-reported outcomes, clinical outcomes, and continuity of care. Methods: Using systematic review methods, studies were searched from six electronic databases—MEDLINE (n = 474), British Nursing Index (n = 320), CINAHL (n = 437), Cochrane Library (n = 370), HMIC (n = 77), and Social Care Online (n = 210). The review considered all health-related outcomes that evaluated the effectiveness of shared care for cancer survivors. Results: Eight randomised controlled trials and three descriptive papers were identified. The results showed the likelihood of similar effectiveness between shared care and usual care in terms of quality of life, mental health outcomes, unmet needs, and clinical outcomes in cancer survivorship. The reviewed studies indicated that shared care overall is highly acceptable to cancer survivors and primary care practitioners, and shared care might be cheaper than usual care. Conclusions: The results from this review suggest that the patient satisfaction of shared care is higher than usual care, and the effectiveness of shared care is similar to usual care in cancer survivorship. Interventions that formally involve primary care and improve the communication between primary care and hospital care could support the PCPs in the follow-up. Keywords: shared care , survivors , follow-up , cance

Dynamics of composite Haldane spin chains in IPA-CuCl3

Magnetic excitations in the quasi-one-dimensional antiferromagnet IPA-CuCl3 are studied by cold neutron inelastic scattering. Strongly dispersive gap excitations are observed. Contrary to previously proposed models, the system is best described as an asymmetric quantum spin ladder. The observed spectrum is interpreted in terms of ``composite'' Haldane spin chains. The key difference from actual S=1 chains is a sharp cutoff of the single-magnon spectrum at a certain critical wave vector.Comment: 4 pages 4 figure

Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4

In conventional spin glasses, the magnetic interaction is not strongly anisotropic and the entire spin system freezes at low temperature. In La2(Cu,Li)O4, for which the in-plane exchange interaction dominates the interplane one, only a fraction of spins with antiferromagnetic correlations extending to neighboring planes become spin-glass. The remaining spins with only in-plane antiferromagnetic correlations remain spin-liquid at low temperature. Such a novel partial spin freezing out of a spin-liquid observed in this cold neutron scattering study is likely due to a delicate balance between disorder and quantum fluctuations in the quasi-two dimensional S=1/2 Heisenberg system.Comment: 4 pages, 4 figure