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A natural neighbour method based on Fraeijs de Veubeke variational principle for materially non-linear problems

Acta Mechanica Sinica 2009年第1期25卷 83-93页

作者： Xiang Li Serge Cescotto barbara rossi Dalian University of Technology 116023 Dalian China ArGEnCo Department University of Liege Liege Belgium

The natural neighbour method can be considered as one of many variants of the meshless methods. In the present paper, a new approach based on the Fraeijs de Veubeke （FdV） functional, which is initially developed for linear elasticity, is extended to the case of geometrically linear but materially non-linear solids. The new approach provides an original treatment to two classical problems： the numerical evaluation of the integrals over the domain A and the enforcement of boundary conditions of the type ui = hi on Su. In the absence of body forces （Fi = 0）, it will be shown that the calculation of integrals of the type fA .dA can be avoided and that boundary conditions of the type ui = hi on Su can be imposed in the average sense in general and exactly if hi is linear between two contour nodes, which is obviously the case for tTi = O.

关键词： Natural neighbour method Meshless methodFraeijs de Veubeke variational principle Discretization Voronoi cell

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Design and criteria of electrospun fibrous scaffolds for the treatment of spinal cord injury

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Neural Regeneration Research 2017年第11期12卷 1786-1790页

作者： barbara Vigani Silvia rossi Giuseppina Sandri Maria Cristina Bonferoni Franca Ferrari Department of Drug Sciences University of PaviaViale TaramelliPaviaItaly

The complex pathophysiology of spinal cord injury may explain the current lack of an effective therapeutic approach for the regeneration of damaged neuronal cells and the recovery of motor functions. Many efforts have been performed to design and develop suitable scaffolds for spinal cord regeneration, keeping in mind that the reconstruction of a pro-regenerative environment is the key challenge for an effective neurogenesis. The aim of this review is to outline the main features of an ideal scaffold, based on biomaterials, produced by the electrospinning technique and intended for the spinal cord regeneration. An overview of the poly- mers more investigated in the production of neural fibrous scaffolds is also provided.

关键词： spinal cord injury biomaterials electrospun fibers conductive scaffolds morphological properties biodegradability

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Donor-to-recipient gender match in liver transplantation: A systematic review and meta-analysis

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World Journal of Gastroenterology 2018年第20期24卷 2203-2210页

作者： Quirino Lai Francesco Giovanardi Fabio Melandro Zoe Larghi Laureiro Manuela Merli barbara Lattanzi Redan Hassan Massimo rossi Gianluca Mennini Hepato-bilio-pancreatic and Liver Transplant Unit Department of Surgery Sapienza University of Rome Division of Gastroenterology Department of Clinical Medicine Sapienza University of Rome

AIM To perform a systematic review and meta-analysis on donor-to-recipient gender mismatch as a risk factor for post-transplant graft loss. METHODS A systematic literature search was performed using PubM ed, Cochrane Library database and EMBASE. The primary outcome was graft loss after liver transplantation. Odds ratios and 95% confidence intervals were calculated to compare the pooled data between groups with different donor-to-recipient gender matches. Three analyses were done considering(1) gender mismatches(F-M and M-F) vs matches(M-M and F-F);(2) Femaleto-Male mismatch vs other matches; and(3) Male-toFemale mismatch vs other *** A total of 7 articles were analysed. Gender mismatch(M-F and F-M) was associated with a significant increase of graft loss respect to match(M-M and F-F)(OR: 1.30; 95%CI: 1.13-1.50; P < 0.001). When F-M mismatch was specifically investigated, it confirmed its detrimental role in terms of graft survival(OR: 1.83; 95%CI: 1.20-2.80; P = 0.005). M-F mismatch failed to present a significant role(OR: 1.09; 95%CI: 0.73-1.62; P = 0.68).CONCLUSION Gender mismatch is a risk factor for poor graft survival after liver transplantation. Female-to-male mismatch represents the worst combination. More studies are needed with the intent to better clarify the reasons for these results.

关键词： Graft survival Female-to-male mismatch Liver transplantation Donor-to-recipient match Gender

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