[en] We find that a fuzzy dark matter background and the mG scale magnetic field in the galactic center can give rise to a radiation with a very large energy release. The frequency of the radiation field is the same as the frequency of the oscillating axion-like background field. We show that there is an energy transfer between the fuzzy dark matter sector and the electromagnetic sector because of the presence of the generated radiation field and the galactic magnetic field. The energy release rate of radiation is found to be very slow in comparison with the energy of fuzzy dark matter but could be significant comparing with the energy of galactic magnetic field in the source region. Using this example, we show that the fuzzy dark matter together with a large scale magnetic field is possible to give rise to fruitful physics.

[en] It is shown that Wess-Zumino-Witten (WZW) type actions can be constructed in odd dimensional space-times using Wilson line or Wilson loop. WZW action constructed using Wilson line gives anomalous gauge variations and the WZW action constructed using Wilson loop gives anomalous chiral transformation. We show that pure gauge theory including Yang-Mills action, Chern-Simons action, and the WZW action can be defined in odd dimensional space-times with even dimensional boundaries. Examples in 3D and 5D are given. We emphasize that this offers a way to generalize gauge theory in odd dimensions. The WZW action constructed using Wilson line cannot be considered as action localized on boundary space-times since it can give anomalous gauge transformations on separated boundaries. We try to show that such WZW action can be obtained in the effective theory when making localized chiral fermions decouple

[en] We have constructed a specific supersymmetric flipped SU(5) GUT model in which bilarge neutrino mixing is incorporated. Because the up-type and down-type quarks in the model are flipped in the representations ten and five with respect to the usual SU(5), the radiatively generated flavor mixing in squark mass matrices due to the large neutrino mixing has a pattern different from those in the conventional SU(5) and SO(10) supersymmetric GUTs. This leads to phenomenological consequences quite different from SU(5) or SO(10) supersymmetric GUT models. That is, it has almost no impact on B physics. On the contrary, the model has effects in top and charm physics as well as lepton physics. In particular, it gives promising prediction on the mass difference, ΔM_D, of the D-D-bar mixing which for some ranges of the parameter space with large tanβ can be at the order of 10⁹ ℎ s^-1, one order of magnitude smaller than the experimental upper bound. In some regions of the parameter space ΔM_D can saturate the present bound. For these ranges of parameter space, t→u,c+h⁰ can reach 10^-5-10^-6 which would be observed at the LHC and future γ-γ colliders

[en] It is shown that the anomaly inflow mechanism can be implemented using Wilson lines in odd dimensional gauge theories. An action of Wess-Zumino-Witten type can be constructed using Wilson lines. The action is understood in the odd dimensional bulk space-time rather than in the even dimensional boundary. This action is not gauge invariant. It gives anomalous gauge variations of the consistent form on boundary space-times. So it can be used to cancel the quantum anomalies localized on boundary space-times. This offers a new way to cancel the gauge anomaly and construct anomaly-free gauge theory in odd dimensional space-time

[en] In order to study the effect of external field treatment on mechanical properties, cutting performance, microstructure of cemented carbide, the cemented carbide samples were treated by different magnetic field frequency (f=0.3 Hz, 0.4 Hz, 0.5 Hz) processing methods using self-made electromagnetic compound treatment device. On the basis of the study of this method, the electromagnetic compound treatment method was proposed to couple pulsed magnetic field and pulsed current. The results show that after the treatment of magnetic field frequency, the hardness of the sample slightly higher than that untreated sample, the increase value of percent between 0.5% and 1.3%, the value of hardness was 1594.72 HV, 1587.76 HV, 1582.45 HV, the longer the magnetization time, the higher the hardness; the cutting performance was increased, which means the tool life was increased, the increase value of percent from 4.5% to 7.0%. After electromagnetic compound treatment, the increase value of percent was 1.7% and 2.3%, the value of hardness was 1601.6 HV, 1609.82 HV; the tool life was increased 7.5% and 8.4%. After external field treatment, the angular state of wolfram carbide (WC) particle was transformed into smooth state and was more evenly distributed. (paper)

[en] Objective: To summarize the clinical and CT features of liver abscess, and to evaluate the clinical effect of percutaneous catheter drainage in treating liver abscess. Methods: A total of 578 patients with liver abscess, who were admitted to authors' hospital during the period from Jan. 2000 to May 2012, were enrolled in this study. The clinical data and the CT findings were retrospectively analyzed. CT features used for analysis included the number of lesion, unilocular or multilocular appearance, cystic or solid in nature, gas in cavity, etc. The factors which might influence the therapeutic effect were analyzed. And the factors influencing the hospitalization days and drainage time were also explored. The results were statistically analyzed by using independent-sample t-test, χ² test and Fisher's exact test with the software of SPSS version 16.0. Results: The main clinical symptoms were fever and pain in the right upper quadrant of abdomen. Infective shock was seen in 52 cases (9.0%) and hematogenous infection was complicated in 80 cases (13.8%). Laboratory studies showed that the main abnormalities included increase of white blood cell and neutrophil percentage, decrease of albumin level, elevated liver enzymes, increased total bilirubin, increase of C-reaction protein, etc. Positive bacteria culture of blood or pus was found in 416 patients (71.9%), and the main pathogen was Klebsiella pneumoniae (69.7%). Technical success rate of percutaneous catheter drainage for liver abscess was 99.7%, while the clinical success rate was 97.4% with a mortality rate of 0.9%. Complications occurred in 5 patients (0.9%). The mean hospitalization day was (13.1 ± 7.4) days, and the average drainage time was (29.2 ± 9.3) days. The factors that influenced the hospitalization day were abscess containing gas, complications such as infective shock, infection at other sites, concomitant hepatobiliary and pancreatic malignant tumor, etc. The factors that influenced the drainage time included multilocular lesion, solid lesion, concomitant hepatobiliary and pancreatic malignant tumor, etc. Concomitant hepatobiliary and pancreatic malignant tumor was the only factor that influenced the clinical success rate. Conclusion: For the liver abscess, percutaneous drainage should be recommended as the treatment of first choice provided that there is no concomitant hepatobiliary or pancreatic malignant tumor. Factors such as multilocular, solid or gas-containing lesion, concomitant infection or infective shock will not affect the clinical success rate although they can elongate the hospitalization time and drainage time. (authors)

[en] Poster presentation

[en] Hydroxyurea (HU) is a novel salt-free reductant used potentially for the separation of U/Pu in the advanced PUREX process. In this work, the radiation stability of HU were systematically investigated in solution by examining the effects of the type of rays (α, β, and γ irradiations), the absorbed dose (10 e50 kGy), and the HNO₃ concentration (0-3 mol L^-1). The influence degree on HU radiolysis rates followed the order of the absorbed dose > the ray type > the HNO3 concentration, but the latter two had moderate effects on HU radiolysis products where NH₄⁺ and NO+2^- were found to be the most abundant ones, suggesting that the differences of α, β, and γ rays should be considered in the study of irradiation effects. The radiolysis mechanism was explored using density functional theory (DFT) calculations, and it proposed the dominant radiolysis paths of HU, indicating that the radiolysis of HU was mainly a free radical reaction among ·H, e_aq^-, H₂O, intermediates, and the radiolytic free radical fragments of HU. The results reported here provide valuable insights into the mechanistic understanding of HU radiolysis under α, β, and γ irradiations and reliable data support for the application of HU in the reprocessing of spent fuel

[en] Objective: The study was to evaluate DWI for quantifying liver fibrosis. Methods: A total of 12 volunteers, 47 patients who had chronic HBV or HCV hepatitis and underwent liver biopsy [Scheuer score for fibrosis(S) and inflammation(G)] were enrolled in this study. They were scanned using a 1.5 T MR unit with b value of 0,250,500,750, 1000 s/mm². ADCs at b_250-1000 and b_500-1000 were the average ADCs of b=250, 500, 750, 1000 s/mm² and b=500, 750, 1000 s/mm². The studied the correlation between Scbeuer scores and ADC values, and conducted Mann-Whitney U test and Logistic regression to evaluate ADC for prediction of fibrosis scores. Results: The average ADCs were (1.41± 0.11), (1.37 ±0.09), (1.27 ± 0.05), (1.26 ± 0.04), (1.22 ± 0.06) mm²/s respectively from SO to S4, stage at b=750 s/mm² (F=18.31, P<0.01). With the increase of fibrosis score, the average ADC decreased gradually, the two were better negatively correlated at b_250-1000 (r=-0.727, P<0.01) than other b values. Using b₇₅₀ and the two combined b values, the found significantly lower ADCs in S2 or greater versus S1 or less and in S3 or greater versus S2 or less fibrosis (P<0.01). The best predictor for S2 or greater was b₇₅₀ with the largest AUC of 0.909, sensitivity of 85.7%, and specificity of 100.0% (ADC ≤ 1.35 x 10^-3 mm²/s). The best predictor for S3 or greater was b_250-1000 with the largest AUC of 0.864, sensitivity of 69.6%, and specificity of 95.8% (ADC ≤ 1.53 x 10^-3 mm²/s). Conclusion: DWI can be a good predictor for scoring liver fibrosis for S2 or S3 stage above, while b₇₅₀ and the combined b values are suitable for evaluation. (authors)

No abstract available