The χ_{b}(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider at sqrt[s]=7  TeV and recorded by the ATLAS detector. Using a data sample corresponding to an integrated luminosity of 4.4  fb^{-1}, these states are reconstructed through their radiative decays to Υ(1S,2S) with Υ→μ^{+}μ^{-}. In addition to the mass peaks corresponding to the decay modes χ_{b}(1P,2P)→Υ(1S)γ, a new structure centered at a mass of 10.530±0.005(stat)±0.009(syst)  GeV is also observed, in both the Υ(1S)γ and Υ(2S)γ decay modes. This structure is interpreted as the χ_{b}(3P) system.

Aim:  The purpose of this study was to identify the turnover intention of graduate nurses in South Korea and to explore the correlates of turnover intention. Methods:  A descriptive, correlational design was used. The participants comprised 225 female nurses who were working at 13 general hospitals and who had accumulated <12 months of clinical nursing experience since their graduation. The data were collected through a structured questionnaire that was conducted from 5-31 August 2009. Results:  The mean score for turnover intention was 7.51. Turnover intention was found to be related to the number of beds in the hospital, workplace, and duration of job orientation (theory and practice), instruction by a preceptor, job stress, clinical competence, self-efficacy, and the practice environment. In the multivariate approach, the practice environment, job stress, and the workplace were found to be significantly related to turnover intention and accounted for 36% of the said intention in the studied graduate nurses. Conclusion:  The results support that the characteristics of magnet hospitals that improve the practice environment could play a critical role in retaining nurses in hospitals. Managerial interventions that enhance the practice environment, reduce job stress, and place graduate nurses in nursing units with a single specialty could benefit the hospitals employing such nurses. Further research to explore the effects of managerial strategies on graduate nurses' turnover intention is warranted.

In this paper, a halftoning-based watermarking method is presented. This method enables high pixel-depth watermark embedding, while maintaining high image quality. This technique is capable of embedding watermarks with pixel depths up to 3 bits without causing prominent degradation to the image quality. To achieve high image quality, the parallel-oriented high-efficient Direct Binary Search (DBS) halftoning is selected to be integrated with the proposed Orientation Modulation (OM) method. The OM method utilizes different halftone texture orientations to carry different watermark data. In the decoder, the Least-Mean-Square-trained (LMS-trained) filters are applied for feature extraction from watermarked images in the frequency domain, and the naïve Bayes classifier is used to analyze the extracted features ultimately to decode the watermark data. Experimental results show that the DBS-based OM encoding method maintains a high degree of image quality, realizes processing efficiency, and robustness to be adapted in printing applications.

BACKGROUND AND PURPOSE:Human prion diseases are known to cause gray matter degeneration in specific cerebral structures, but evidence for white matter involvement is scarce. We used DTI to test the hypothesis that white matter integrity is disrupted in human CJD during the early stages of the disease.MATERIALS AND METHODS:Twenty-one patients with the E200K variant of CJD and 19 controls participated in DTI studies conducted on a 1.5T MR imaging scanner. The data were quantitatively analyzed and mapped with a voxelwise TBSS method.RESULTS:We found significant reductions of FA in patients with CJD in distinct and functionally relevant white matter pathways, including the corticospinal tract, internal capsule, external capsule, fornix, and posterior thalamic radiation. Moreover, these FA deficits increased with disease duration, and were mainly determined by increase of radial diffusivity, suggesting elevated permeability of axonal membranes.CONCLUSIONS:The findings suggest that some of the symptoms of CJD may be caused by a functional dysconnection syndrome, and that the leukoencephalopathy is progressive and detectable fairly early in the course of the disease.