Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reducing latency in presenting content. In one aspect, a system includes a native application that presents an interactive item and a latency reduction engine. The latency reduction engine detects interaction with the interactive item that links to a first electronic resource that is different from the native application and provided by a first network domain and in response to the detecting, reduces latency in presenting the first electronic resource, including executing a first processing thread and a second processing thread in parallel. The first processing thread requests a second electronic resource from a second network domain and loads the second electronic resource and, in response to the loading, stores a browser cookie for the second network domain. The second processing thread requests the first electronic resource and presents the first electronic resource.

Abstract: A system and method for authenticating an additively manufactured component is provided. The method includes locating an identifying region of the component that includes localized density variations that define a component identifier. The method further includes interrogating the identifying region of the component using a scanning device such as an x-ray computed tomography device to obtain the component identifier. The method further includes obtaining a reference identifier from a database, comparing the component identifier to the reference identifier, and determining that the component is authentic if the component identifier matches the reference identifier.

Abstract: A system and method for authenticating an additively manufactured component are provided. The method includes locating an identifying region on the component which may be positioned at a predetermined location relative to an identifiable datum feature. The identifying region may be scanned to determine a component identifier of the component. A reference identifier may be obtained from a database and compared to the component identifier to determine whether the component is authentic.

Abstract: System for assisting in reducing the spread of fire between adjacent rooms in a building proximate to the ceiling thereof includes an elongated header track, at least one elongated filler constructed at least partially of compressible or elastic material and at least one fire-blocker constructed at least partially of fire retarding material.

Abstract: A method of controlling an additive manufacturing process in which a directed energy source is used to selectively melt material to form a workpiece, forming a melt pool in the process of melting. The method includes: using an imaging apparatus to generate an image of the melt pool comprising an array of individual image elements, the image including a measurement of at least one physical property for each of the individual image elements; using a software machine learning algorithm to classify each image as acceptable or unacceptable; and controlling at least one aspect of the additive manufacturing process with reference to the image classification.

Abstract: A method of controlling an additive manufacturing process in which a directed energy source is used to selectively melt material to form a workpiece, forming a melt pool in the process of melting, the method including: using an imaging apparatus to generate an image of the melt pool comprising an array of individual image elements, the image including a measurement of at least one physical property for each of the individual image elements; from the measurements, mapping a melt pool boundary of the melt pool; and controlling at least one aspect of the additive manufacturing process with reference to the melt pool boundary.

Abstract: A method of controlling an additive manufacturing process in which a directed energy source is used to selectively melt material to form a workpiece, forming a melt pool in the process of melting, the method comprising: using an imaging apparatus to generate an image of the melt pool comprising an array of individual image elements, the image including a measurement of at least one physical property for each of the individual image elements; from the measurements, mapping a melt pool boundary of the melt pool; computing a algebraic connectivity of the melt pool; and controlling at least one aspect of the additive manufacturing process with reference to the algebraic connectivity.

Abstract: A method of controlling an additive manufacturing process in which a directed energy source is used to selectively melt material to form a workpiece, forming a melt pool in the process of melting, the method comprising: using an imaging apparatus to generate an image of the melt pool comprising an array of individual image elements, the image including a measurement of at least one physical property for each of the individual image elements; from the measurements, mapping a melt pool boundary of the melt pool; computing a geometric length of the melt pool boundary; and controlling at least one aspect of the additive manufacturing process with reference to the geometric length.

Abstract: A method of controlling an additive manufacturing process in which a directed energy source is used to selectively melt material to form a workpiece, forming a melt pool in the process of melting, the method comprising: using an imaging apparatus to generate an image of the melt pool comprising an array of individual image elements, the image including a measurement of at least one physical property for each of the individual image elements; from the measurements, mapping a melt pool boundary of the melt pool; computing a fractal dimension of the melt pool; and controlling at least one aspect of the additive manufacturing process with reference to the fractal dimension.

Abstract: A method of controlling an additive manufacturing process in which a directed energy source is used to selectively melt material to form a workpiece, forming a melt pool in the process of melting. The method includes: using an imaging apparatus to generate an image of the melt pool comprising an array of individual image elements, the image including a measurement of at least one physical property for each of the individual image elements; from the measurements, mapping a melt pool boundary of the melt pool; applying Green's theorem to the melt pool boundary; and controlling at least one aspect of the additive manufacturing process with reference to the Green's theorem application.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reducing latency in presenting content. In one aspect, a system includes a native application that presents an interactive item and a latency reduction engine. The latency reduction engine detects interaction with the interactive item that links to a first electronic resource that is different from the native application and provided by a first network domain and in response to the detecting, reduces latency in presenting the first electronic resource, including executing a first processing thread and a second processing thread in parallel. The first processing thread requests a second electronic resource from a second network domain and loads the second electronic resource and, in response to the loading, stores a browser cookie for the second network domain. The second processing thread requests the first electronic resource and presents the first electronic resource.

Abstract: A method and apparatus for additive manufacturing is provided whereby a curtain of powder is provided adjacent a vertically oriented build plate, and a laser melts or sinters the powder over a region of the build plate. The curtain of powder is moved relative to the build plate to maintain the same distance between the curtain and the previously deposited layer, and the process repeated to provide a three dimensional structure on the build plate.

Abstract: A system and method of monitoring a powder-bed additive manufacturing process is provided where a layer of additive powder is fused using an energy source and electromagnetic emission signals are measured by a melt pool monitoring system to monitor the print process. The measured emission signals are analyzed to identify outlier emissions and clusters of outliers are identified by assessing the spatial proximity of the outlier emissions, e.g., using clustering algorithms, spatial control charts, etc. An alert may be provided or a process adjustment may be made when a cluster is identified or when a magnitude of a cluster exceeds a predetermined cluster threshold.

Abstract: The present invention is related to additive manufacturing methods and systems using a recoater with in-situ exchangeable recoater blades. Being able to switch out recoater blades in situ, i.e. without stopping the build and opening up the build chamber, is advantageous, especially for larger, more complicated, and/or longer builds. For instance, if a recoater blade becomes damaged, a new one can be readily swapped in. Or if a different material for the object(s) is used during the build, it may be advantageous to switch in a new recoater blade that is made of the new, different material.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically selecting a content loading technique are disclosed. In one aspect, a method includes the actions of receiving a request for third-party content. The actions further include generating a first loading score that reflects a likelihood that a third-party content item that is selected using the first third-party content loading technique will render on a display of the client device. The actions further include generating a second loading score that reflects a likelihood that a third-party content item that is selected using the second third-party content loading technique will render on the display. The actions further include comparing the first and second loading scores. The actions further include selecting the first third-party content loading technique. The actions further include selecting and providing a given third-party content item.

Abstract: A system and method for calibrating a melt pool monitoring system of an additive manufacturing machine includes installing a calibration system on the machine and performing a calibration process. Specifically, the calibration system includes a calibration platform removably mountable to a build platform of the additive manufacturing machine and having calibrated electromagnetic energy sources mounted thereon for defining a measurement standard. The electromagnetic energy generated is measured by the melt pool monitoring system and compared to the known measurement standard to determine whether system adjustments would improve process tolerances or uniformity.

Abstract: A gaming system includes a central server or controller operable to communicate a plurality of different commands to a plurality of gaming machines to provide non-tournament game play and to provide tournament game play on the same gaming machines.

Abstract: This document describes a content caching system for pre-loading digital components, the system including a communication interface configured to communicate with a remote device over a wireless network, a local content cache; and an evaluation system comprising one or more processors. The one or more operations include pre-loading a digital component for rendering in a browser at a time that is subsequent to a time of the pre-loading, registering a scheme of a network reference for the cached digital component, with the scheme comprising a specified portion of the network reference for the cached digital component; retrieving, from the local content cache, the pre-loaded digital component associated with the digital component tag comprising the network reference; and rendering, from the local content cache, the pre-loaded digital component in a graphical user interface rather than requesting the digital component from the remote device.

Abstract: System for assisting in reducing the spread of fire between adjacent rooms in a building proximate to the ceiling thereof includes an elongated header track, at least one elongated filler constructed at least partially of compressible or elastic material and at least one fire-blocker constructed at least partially of fire retarding material.