Abstract: Methods and systems are presented for providing a secured framework for facilitating electronic transactions using a multi-party computation approach. Under the multi-party computation approach, the task of authenticating a transaction conducted through a user account is distributed among multiple computer nodes. One or more secrets and shares of a secret are distributed among the multiple computer nodes. An authentication process is implemented such that at least a portion of the multiple computer nodes, including one or more required nodes, exceeding a predetermined number of nodes are needed to perform a set of computations using the corresponding secret(s) and/or shares of the secret in order to generate a digital signature for the user account. By verifying the digital signature using a public key of the user account, it can be determined that the participation requirement has been satisfied.

Abstract: Methods and systems are presented for providing a framework for facilitating multi-party computation within a sharding environment. After a blockchain is divided into multiple shard chains, a multi-party computation system obtains attributes associated with a first shard chain. The attributes may represent characteristics of the first shard chain, characteristics of transactions recorded in the first shard chain, and characteristics of the computer nodes configured to manage the first shard chain. Based on the attributes, the multi-party computation system determines a multi-party computation scheme that specifies a minimum threshold number of nodes required to participate in a transaction validation process and at least one required node required to participate in the transaction validation process for the first shard chain.

Abstract: Methods and systems are presented for providing a multi-party computation (MPC) framework for dynamically configuring, deploying, and utilizing an MPC system for performing distributed computations. Based on device attributes and network attributes associated with computer nodes that are available to be part of the MPC system, a configuration for the MPC system is determined. The configuration may specify a total number of computer nodes within the MPC system, a minimum number of computer nodes required to participate in performing a computation process, a key distribution mechanism, and a computation processing mechanism. Encryption keys are generated and distributed among the computer nodes based on the key distribution mechanism. Upon receiving a request for performing the computation, updated network attributes are obtained.

Abstract: Methods and systems are presented for providing a framework for facilitating multi-party computation within a sharding environment. After a blockchain is divided into multiple shard chains, a multi-party computation system obtains attributes associated with a first shard chain. The attributes may represent characteristics of the first shard chain, characteristics of transactions recorded in the first shard chain, and characteristics of the computer nodes configured to manage the first shard chain. Based on the attributes, the multi-party computation system determines a multi-party computation scheme that specifies a minimum threshold number of nodes required to participate in a transaction validation process and at least one required node required to participate in the transaction validation process for the first shard chain.

Abstract: Quantum computers with a limited number of input qubits are used to perform machine learning processes having a far greater number of trainable features. A list of features of a field are divided into a plurality of feature groups. Each of the feature groups includes a respective group of some, but not all, of the features. A first machine learning process is performed to train a first instance of a quantum computer model, where the feature groups are used as inputs. Based on the first machine learning process being performed, a subset of the feature groups is selected for a second machine learning process. Thereafter, the second machine learning process is performed to train one or more second instances of the quantum computer model. The individual features of the selected subset of the feature groups are used as inputs for the second instances of the quantum computer model.

Abstract: Methods and systems are presented for providing a framework for facilitating multi-party computation within a sharding environment. After a blockchain is divided into multiple shard chains, a multi-party computation system obtains attributes associated with a first shard chain. The attributes may represent characteristics of the first shard chain, characteristics of transactions recorded in the first shard chain, and characteristics of the computer nodes configured to manage the first shard chain. Based on the attributes, the multi-party computation system determines a multi-party computation scheme that specifies a minimum threshold number of nodes required to participate in a transaction validation process and at least one required node required to participate in the transaction validation process for the first shard chain.

Abstract: Methods and systems are presented for providing a multi-party computation (MPC) framework for dynamically configuring, deploying, and utilizing an MPC system for performing distributed computations. Based on device attributes and network attributes associated with computer nodes that are available to be part of the MPC system, a configuration for the MPC system is determined. The configuration may specify a total number of computer nodes within the MPC system, a minimum number of computer nodes required to participate in performing a computation process, a key distribution mechanism, and a computation processing mechanism. Encryption keys are generated and distributed among the computer nodes based on the key distribution mechanism. Upon receiving a request for performing the computation, updated network attributes are obtained.

Abstract: Methods and systems are presented for providing a secured framework for facilitating electronic transactions using a multi-party computation approach. Under the multi-party computation approach, the task of authenticating a transaction conducted through a user account is distributed among multiple computer nodes. One or more secrets and shares of a secret are distributed among the multiple computer nodes. An authentication process is implemented such that at least a portion of the multiple computer nodes, including one or more required nodes, exceeding a predetermined number of nodes are needed to perform a set of computations using the corresponding secret(s) and/or shares of the secret in order to generate a digital signature for the user account. By verifying the digital signature using a public key of the user account, it can be determined that the participation requirement has been satisfied.

Abstract: A method for generating a second virtual object from a first virtual object, the second virtual object being projected on a projection screen, where the first virtual object is determined for a user in a first position, and where the second virtual object is determined for a user in a second position, different from the first known position, the position of the second virtual object being determined by applying the intercept theorem. Once the second virtual object has been determined, the method further includes the step of generating image data for the second virtual object, rendering the second virtual object by projecting the image data on the projection screen.

Abstract: The present invention is a device for detecting water on the road that allows to automatically adapt the speed limits on roads according to the traffic conditions, and to transmit the information to a receiver. The device according to the invention is based on the use of a ray of light transformed by refraction and absorption phenomena for detecting water on the road, by using the passage of vehicles as an indicator of the state of the road by that the wheels will cause in the back of their passage splashes or columns of water when the road is wet, these splashes causing, especially by refraction or absorption effect, a change in the quality of a ray of light when it passes through them before it reaches a receiver. The receiver can display the information on a vehicle dashboard or on variable display signaling panels, or even transmit it to one or more automatic radar traps.

Abstract: A calibration for an AR gaming system or method so that players equipped with AR capable devices such as handheld devices can join in an augmented reality game in an area such as a lobby of premises such as a cinema, shopping mall, museum, airport hall, hotel hall, attraction park, etc. The lobby L is equipped with digital Visual equipment and optionally Audio equipment connected to a digital signage network, In particular, the lobby L is populated with one or more display devices, such as fixed format displays, for instance LC displays, tiled LC displays, LED displays, plasma displays or projector displays, displaying either monoscopic 2D or stereoscopic 3D content. These displays are used to allow onlookers to see through a window onto the virtual world of the AR game.

Abstract: A method for acquiring data, in an electronic acquisition module, detected by a sensor embedded on a vehicle with a predefined trajectory, including the following operations implemented in real time by an electronic acquisition module including a database defining, for each of a plurality of points of the predefined trajectory, a set of subsections of interest indicating at least one subsection of interest in the acquisition zone of the sensor: determining a next position of the moving vehicle on the predefined trajectory of the moving vehicle, and determining, as a function of at least the subsection of interest defined by the database for the point corresponding to the determined position, the value of a parameter included among acquisition of the data by the embedded sensor in the next position, or a processing parameter of the data captured by the embedded sensor in the next position.

Abstract: A cache management system, method, and computer-readable medium which manage caching of resources are provided. The method includes receiving a request for a resource including a hierarchical resource locator, fetching the resource from a node upon determining that the resource is not stored in a cache, adding an entry for the resource to a mapping table associated with the cache, the entry including the resource locator and dependency information for dependent resources identified from the hierarchical structure of the resource locator, and updating entries in the mapping table for master resources identified from the hierarchical structure of the resource locator, the updated entries including an identifier for the resource.

Abstract: A cache management system, method, and computer-readable medium which manage caching of resources are provided. The method includes receiving a request for a resource including a hierarchical resource locator, fetching the resource from a node upon determining that the resource is not stored in a cache, adding an entry for the resource to a mapping table associated with the cache, the entry including the resource locator and dependency information for dependent resources identified from the hierarchical structure of the resource locator, and updating entries in the mapping table for master resources identified from the hierarchical structure of the resource locator, the updated entries including an identifier for the resource.

Abstract: A cache management apparatus, method, and computer readable medium which manages caching of resources. The method includes analyzing a structure of a resource in a system which exposes resources to clients, generating a dependency graph of objects linked to a resource based on the analyzed structure of the resource, and managing caching of resources based on the generated dependency graphs. A generated dependency graph includes hierarchical dependency information with respect to the objects of the resource.

Abstract: A cache management apparatus, method, and computer readable medium which manages caching of resources. The method includes analyzing a structure of a resource in a system which exposes resources to clients, generating a dependency graph of objects linked to a resource based on the analyzed structure of the resource, and managing caching of resources based on the generated dependency graphs. A generated dependency graph includes hierarchical dependency information with respect to the objects of the resource.

Abstract: The invention relates to an apparatus for cutting of a web (1) conveyed along a conveyance direction (F), and subsequent feeding and threading it up into a processing line, said web (1) comprising a central portion (1c) and edges (1a, 1b), said apparatus comprising central cutting means (2a, 2b) for cutting the central portion (1c) laterally and transversely to the conveyance direction (F) and edge cutting means (3a, 3b) for cutting the edges (1a, 1b) transversely to the conveyance direction (F), said apparatus further comprising edge channels (4a, 4b) for taking up the edges (1a, 1b) into the processing line, said channels being substantially closed and comprising movable lids. The invention also provides a method for threading up a web in a processing line. The invention finally provides edge channels (4a, 4b).

Abstract: Apparatus for winding a web (1) on a winding roll (2), comprises at least a first and a second roll (3, 4) and a third roll (5), said first roll being located on one side and said second roll and said third roll being located on the other side of the path of said web in course of winding on said winding roll. Said first and second rolls and said third roll are movable towards each other and towards said winding roll, so that said third roll get sandwiched between said winding roll on one hand and said first and second rolls on the other hand, said web passing between said first roll and said third roll and then between said third roll and said winding roll. Means cause said third roll to position and align freely between said first and second rolls and said winding roll.

Abstract: A segmented vacuum roll comprising an inner assembly on which a plurality of cylindrical sleeve tubes (2a, 2b, 2c) having apertures over their circumference are rotatably and coaxially mounted side by side, each of said sleeve tubes being individually rotatable and one or several first chambers (9a, 9b, 9c) formed in said inner assembly and partly defined by a first portion of circumference of said sleeve tubes, said inner assembly comprising linking channels (6a, 6b, 6c) for linking a vacuum source to said chambers so that said first portion of circumference of said sleeve tubes may be submitted to vacuum. Said inner assembly comprises an inner tube (3), at least one outer tube (5a, 5b, 5c) surrounding said inner tube and a plurality of longitudinal walls extending between said inner tube and said outer tube so as to form longitudinal channels (6a, 6b, 6c).

Abstract: The instant invention relates to an apparatus for winding a web arriving from a conveyance direction, comprising: primary winding roll (3) and secondary driving means (2), switching means (4a, 4b) for switching the winding from the secondary means (2) to the primary winding roll (3), and cutting means (5) to cut the at least one web (1) between the primary winding roll (3) and the secondary driving means (2), wherein the switching means comprise diverting (4b) situated opposite to the primary winding roll (3) with respect to the at least one web (1), said diverting means being movable along a transverse direction (G) intersecting the conveyance direction (F) to entrain the at least one web (1) towards the primary winding roll (3), whereby the at least one web (1) is cut and caused to be wound on the primary winding roll (3). The invention also relates to a method for winding a web, especially using the apparatus of the invention as well as a double pantograph frame suited to be used with said apparatus.