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We propose a new method to determine magnetic fields, by using the magnetic-field induced electric dipole transition 3p 4 3d 4 D 7/2 → 3p 5 2 P 3/2 in Fe 9+ ions. This ion has a high abundance in astrophysical plasma and is therefore well-suited for direct measurements of even rather weak fields in e.g. solar flares. This transition is induced by an external magnetic field and its rate is proportional to the square of the magnetic field strength. We present theoretical values for what we will label the reduced rate and propose that the critical energy difference between the upper level in this transition and the close to degenerate 3p 4 3d 4 D 5/2 should be measured experimentally since it is required to determine the relative intensity of this magnetic line for different magnetic fields. * Electronic address: Tomas.Brage@fysik.lu.se † Electronic address: rhutton@fudan.edu.cn

Spectroscopy in the wavelength region of 330 nm to 400 nm for highly charged tungsten was performed using the High Temperature Super Conducting Electron Beam Ion Trap (SH-HtscEBIT) at Fudan University. Three lines from palladium-like tungsten (W 28+ ) were identified as transitions between metastable levels in the first excited configuration ([Kr]4d 9 4f). A secondorder relativistic many-body perturbation theory approach and a simple collisional radiative model were used to theoretically study the fine structure levels of the 4d 9 4f configuration. The calculated results show qualitative agreement with experiment. We conclude that some levels in the 4d 9 4f excited configuration have extremely long lifetimes and may exhibit extraordinarily high populations, possibly leading to indirect ionization in, for example, fusion plasmas.

In this work, the KLL dielectronic recombination (DR) resonant strengths of He-through to O-like Xe ions were studied, both through experiment and calculation. The experiments were done using a fast electron beam-energy scanning technique at the Shanghai electron beam ion trap. The calculations were done by using the flexible atomic code (FAC), in which the relativistic configuration interaction (RCI) method was employed. For the total resonant strengths, the present experimental and theoretical results for He-, Be-, B-, C-, N-, and O-like Xe ions agree within experimental uncertainties (about 9%). But the experimental result for Li-like Xe is 14% higher than the calculation. The present FAC calculations of the total DR strengths were compared with the available previous calculations, using RCI or multiconfiguration Dirac-Fock (MCDF) methods, and the agreement was very good. In this work, some intermediate-state resolved KLL DR strengths were also obtained and compared with theoretical results, and more discrepancies were revealed.

Aims: To evaluate the efficacy and safety of fibrin sealant in conjunctival autograft fixation in pterygium surgery. Methods: Prospective, comparative, interventional case series. 40 eyes of 40 patients with nasal primary pterygium, 24 male and 16 female, were enrolled. The patients were assigned to two groups and each contained 12 male and 8 female based on the pterygium area encroaching onto the cornea. In one group the conjunctival autograft was attached to the sclera with fibrin sealant and the other group with nylon 10–0 sutures. All the patients were followed up postoperatively on days 1, 3, 7 and 14 then at months 1, 2, 6 and 12. The main outcome measures included operating time, postoperative symptoms, graft success, recurrence rate and complications. Results: The average operating time was significantly shorter (p < 0.001) in the fibrin sealant group and fewer postoperative symptom complaints were received as well. By the end of 1-year follow-up, the recurrence rate was 5% in the fibrin sealant group and 10% in the suture group (p = 1.000), and there was no statistically significant difference in complications (p > 0.05) between the two groups. Conclusions: It is safe and effective to use fibrin sealant for conjunctival autograft fixation. This method causes much fewer postoperative symptoms and shortens surgery time significantly, and the long-term results are also favorable.

comprised recognized experts in myopia prevention and treatment, public health experts from around the world, and organization representatives from the American Academy of Family Physicians, American Academy of Optometry, and American Academy of Pediatrics. The Academy's Board of Trustees believes that myopia is a high-priority cause of visual impairment, warranting a timely evaluation and synthesis of the scientific literature and formulation of an action plan to address the issue from different perspectives. This includes education of physicians and other health care providers, patients and their families, schools, and local and national public health agencies; defining health policies to ameliorate patients' access to appropriate therapy and to promote effective public health interventions; and fostering promising avenues of research.

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