Abstract: Embodiments described herein relate to computer systems and methods for derivative or perpetual transactions. The systems and methods involve a plurality of user devices having an interface for the system, the user devices associated with user accounts, each user account having one or more perpetual positions. The systems and methods involve a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the one or more memories storing instructions for a risk engine capable of managing perpetual futures for the trading accounts, each of the trading accounts having its own perpetual positions. The processing system receives input from the interface and generates output for transmission to and display at the interface.

Abstract: Embodiments relate to systems and methods for on-demand margin borrowing and lending with automated de-leveraging. The method for on-demand margin borrowing and lending with automated de-leveraging executing instructions stored on memory by a hardware processor, can involve: enabling margin on a subaccount for cross-collateralization of assets; setting leverage threshold values for the subaccount; processing a loan request to buy or sell an asset from a borrower interface; processing a loan offer to generate returns from idle assets from a lender interface; determining rate for assets; executing a margin transaction between the borrower interface and a lender interface, the margin transaction being smart contract code for a blockchain infrastructure; and computing different types of margin data, and generating output for transmission, storage, or display at an interface.

Abstract: The invention relates to a shoulder prosthesis comprising a diaphyseal part extending along a diaphyseal axis and on which an epiphyseal part is mounted, the epiphyseal part having an upper face which is inclined along a front plane with respect to the diaphyseal axis, and a lower central face bearing against a complementary upper face of the diaphyseal part. According to the invention, the epiphyseal part is reversible by rotation through 180° about an axis normal to the lower central face bearing against the epiphyseal part to modify the inclination of the upper face of the epiphyseal part.

Abstract: The invention relates to a fixation system between a medical device and at least one portion of a bone, characterised in that it comprises an elongate portion intended to be inserted into the bone, in particular into the medullary cavity and/or into the proximal or distal ends, the elongate portion having a wall consisting of meshes through which at least one fixing member can pass, according to a position and orientation that are not predefined, and which apply, by elastic, plastic or elastic-plastic deformation, a transverse and/or axial pressure force onto the fixing member, the fixing member being intended to also pass through the portion of the bone in order to ensure rigid fixation between the bone and the medical device.