Abstract: A surface grid panel assembly includes a grid panel and a plurality of attachment studs formed thereon. The grid panel includes a plurality of first and second grid members intersecting with each other. The attachment studs are spacedly protruded from top surfaces of the first and second grid members of the grid panel, wherein one or more attachment elements are adapted for detachably coupling with the attachment studs to couple the attachment elements on the grid panel.

Abstract: A surface grid panel assembly includes a grid panel and a plurality of attachment studs formed thereon. The grid panel includes a plurality of first and second grid members intersecting with each other. The attachment studs are spacedly protruded from top surfaces of the first and second grid members of the grid panel, wherein one or more attachment elements are adapted for detachably coupling with the attachment studs to couple the attachment elements on the grid panel.

Abstract: A foldable football holder includes at least two elongated supporting arms, an elongated holding arm, and a holder joint. The holder joint is configured to have a secure portion and two pivot wing portions with a predetermined unfolding angle therebetween. A mounting end portion of the holding arm is securely coupled with the secure portion of the holder joint while a holding end portion of the holding arm is extended away from the holder joint in a first direction and the pivot end portions of the two supporting arms are rotatably coupled with the two pivot wing portions of the holder joint about two pivot axes respectively.

Abstract: The present invention relates to the field of biotechnology and aims to provide a YAP1 gene-modified mesenchymal stem cell and a method for preparing the same. The mesenchymal stem cell is a primary mesenchymal stem cell modified by overexpressed YAP1 gene, wherein the YAP1 gene is derived from a YAP1 lentiviral vector or a YAP1 plasmid vector, and the primary mesenchymal stem cell is derived from any of the following human tissues: placenta, umbilical cord or adipose tissue. The YAP1 gene-modified mesenchymal stem cell obtained by the present invention has no effect on the phenotype and differentiation ability of MSCs themselves; the present invention can significantly promote the proliferation of mesenchymal stem cell and further increase the cell yield by modifying the mesenchymal stem cell with overexpressed YAP1 gene; therefore, a large number of mesenchymal stem cells can be rapidly obtained for clinical stem cell transplantation therapy.

Abstract: A segmented direct gate drive circuit of a depletion mode GaN power device, a gate voltage of the GaN power device is charged from a negative voltage turn-off level to a threshold voltage of the GaN power device; when the gate voltage of the GaN power device is charged to the threshold voltage of the GaN power device, a current mirror charging module first turns on less than N of charging current mirror modules to charge the gate voltage of the GaN power device from the threshold voltage of the GaN power device to a Miller platform voltage of the GaN power device, and turns on N charging current mirror modules to charge the gate voltage of the GaN power device from the Miller platform voltage of the GaN power device to a zero level.

Abstract: Rubber replacement articles prepared from curable compositions are provided. The curable compositions comprise: (a) an isocyanate-functional prepolymer; (b) a curing agent comprising a mixture of polyamines, wherein at least one polyamine has an amine equivalent weight of 125 to 250; and (c) an abrasion resistant additive comprising organic particles demonstrating a volume average particle size of at least 5 microns. The isocyanate-functional prepolymer is (i) a reaction product of a polyisocyanate and a polyamine having primary and/or secondary amino groups; and/or (ii) a reaction product of a polyisocyanate and a polyol.