[en] Highlights: • 3D phase-field modeling is developed to investigate the deformation of MG nanowires. • The surface defects significantly affect the mechanical properties of nanowires. • Multiple shear bands are initiated from the surfaces of nanowires with D < 50 nm. - Abstract: It is very challenging to investigate the deformation mechanisms in micro- and nano-scale metallic glasses with diameters below several hundred nanometers using the atomistic simulation or the experimental approaches. In this work, we develop the fully three-dimensional phase-field model to bridge this gap and investigate the sample size effects on the deformation behaviors of metallic glass nanowires. The initial deformation defects on the surface are found to significantly affect the mechanical strength and deformation mode of nanowires. The improved ductility of metallic glass nanowires could be related with the multiple shear bands initiated from the nanowire surfaces

[en] The structures of some superheavy nuclei are investigated using self-consistent relativistic mean-field (RMF) model. The calculated binding energies and alpha-decay energies are in good agreement with experimental data. The theoretical lifetime reasonably agrees with the data. The properties of some unknown superheavy nuclei are predicted. A discussion on the deformed shell around Z=108 is made

[en] The conservation law of a gauge stress field of materials with defects is derived. The field equations and a criterion of the singularity (dislocation, crack, etc.) motion in a continuum with defects are obtained. (author)

[en] The mechanical behaviour of a material manifold with dislocations and disclinations is explored by applying nonriemannian geometry and gauge field theory. A geometric gauge theory of metric defects is introduced by local Lorentz invariance. As a result, we give the connection coefficients with the affine and the gauge connection. Taking the displacement field, the frame field and the gauge field as basic parameters, we obtain the constitutive equations and the governing equations based on a variational principle with respect to the groups of a coordinate transformation and a gauge transformation. (author). 24 refs

[en] Objective: The aim of this study is to explore the risk factor caused by renal space-occupying. Materials and Methods: From Jan 2000 to Mar 2003,75 patients (41 male, 34 female) with renal space-occupying, age from 14 to 71 years, who underwent radical nephrectomy were studied in our hospital. 1. All patients were performed by Tc99m-DTPA dynamic renography 2 days before operation:then GFR (GATES) and blood pressure of pre-operation were measured. 2. All patients were divided into two groups according to the pathology of post-operation:Group A (GA)is renal cell carcinoma and group B (GB)is other renal space-occupying. We compared the incidence rate of hypertension between two groups. 3. All cases were divided into two groups based on the GFR of the contralateral kindey without space-occupying, The first group(group I) is GFR≥50 ml/min and the second(group II) is GFR<50 ml/min. Results: 1. The average GFR of the contralateral kindey without space-occupying is 46.48± 10.09 ml/min(37.2-85.6 ml/min). 2. The incidence rate of hypertension of renal cell carcinoma is 17.4% (GA) and 20.7% in other renal space-occupying(GB) respectively.There is no significant difference between two groups(P>0.05). 3. There is no hypertension case in the group I. 14 hypertension cases are in group II. The incidence rate of hypertension in group II is 25%. There is a significant difference between two groups(P<0.05). Conclusion: GFR<50 ml/min in the contralateral kindey without space-occupying is the risk factor of hypertension in patients with space-occupying. (authors)

[en] Laser excitation studies of CaF₂ crystals doped with 0.01 to 10% Ho³⁺ using the second harmonic wavelength 532 nm of a pulsed Nd:YAG laser are carried out. Three fluorescence bands belonging to the ⁵F₄, ⁵S₂ → ⁵I₈, ⁵F₄, ⁵S₂ → ⁵I₇ and ⁵F₅ → ⁵I₈ transitions are detected. Fluorescence lifetimes of the first two transitions are measured and used for site-identification of new lines. Four upconverted fluorescence bands belonging to the ⁵F₃ → ⁵I₈, ⁵G₄ → ⁵I₈, ⁵G₅ → ⁵I₈, ⁵H₅, ⁵H₆ → ⁵I₈ transitions are also detected. A comparative study is made of two pairs of energy transfer mechanisms, which are multiphonon relaxation versus ion-pair relaxation and two-photon absorption versus ion-pair relaxation. The analysis of the concentration dependence of fluorescence intensities shows that ion-pair relaxation is the chief mechanism responsible for the fluorescence and upconversion behaviour of CaF₂:Ho³⁺. (orig.)

[en] Present researches on halos in exotic nuclei are reviewed and discussed. These include both neutron halos and proton halos in some exotic nuclei far from stability. The recently observed halos are reproduced by model calculations and new candidates of halo nuclei are predicted. (author)

[en] China has begun to build its underground research laboratory (URL) for high level radioactive waste (HLW) disposal in Beishan area, a preselected area of the repository, located in the Gobi hinterland of Gansu Province in northwestern China. The construction of URL will arouse the attention of surrounding residents. Based on the attitude, concerns, and main demands on the development of nuclear industry of the public around the preselected area, the key messages to be conveyed were sorted out. Combined with the identification of key stakeholders at the present stage, the public communication strategy and working mechanism were determined, and a preliminary publicity program for the early construction stage of URL has been put forward. The program aims to improve the public’s awareness and shorten their psychological distance from HLW disposal. It comprehensively utilizes the advantages of widespread and fast speed of online video publicity and offline publicity to deepen personal experience. Publicity videos were produced for different stakeholders, especially in the cartoon “A Fu’s way to future home,” which personified HLW and multiple barriers, thereby establishing an emotional connection with the audience and conveying the value of “human beings are responsible for the proper disposal of HLW.” By telling the story of their search for a suitable home (repository site), the cartoon vividly demonstrates the containment and isolation function of multiple barriers and the site selection criteria for the repository. In the early construction stage of URL, communication with the visitors is mainly rely on a temporary exhibition hall. After completion, it will be upgraded to the visitor center and demonstration tunnel, so that the public can get an intuitive impression while visiting and have a deeper understanding of geological disposal technology through face-to-face communication with technical experts. (author)

[en] One of the proton halo candidates ²³Al and its isotopes are systematically investigated in the nonlinear Relativistic Mean-Field and Skyrme Hartree-Fock approaches. It is shown that there exists the energy inversion of (((5)/(2)))⁺(202) and (((1)/(2)))⁺(211) orbitals in ²³Al nucleus and which may produce the large enhancement of reaction cross section comparing with its neighboring nuclei. Meanwhile, it is obvious to see that the isospin effect of the pairing correlation plays a great role to the separation energy when the Al isotopes approach to the proton drip line. In addition, the ground state and excited state of ⁹B, ¹³N are also investigated in the RMF model. There may exist the halo structure in ¹³N when the last proton of ¹³N occupies in the first excited state

[en] The current study on proton halos in exotic light nuclei is simply reviewed and discussed. This includes the recently-observed proton halos in ¹⁷F, ²³Al, ^26-28P. We place emphasis on the newly discovered proton halo in ²³Al. The possible cause for a proton halo in ²³Al is analyzed and it is found deformation can be important for it. (author)