Abstract: A three-dimensional printer for the additive manufacturing of a part is provided. The printer includes a build platen, a pre-extrusion system, and a print head located downstream of the pre-extrusion system and configured to receive and deposit a filament. The print head includes a receiving section configured to receive the filament, an outlet through which the filament is deposited onto the build platen or a previously added layer of a part, a feeding mechanism constructed and arranged to feed the filament into the outlet, and a path length adjustment system positioned on the print head disposed between the pre-extrusion system and the feeding mechanism. The path length adjustment system constructed and arranged to create slack in the filament being delivered from the pre-extrusion system. Path length adjustment devices incorporating sliding components and flexure components are also disclosed.

Abstract: Various techniques facilitate the development of an image library that can be used to train and/or validate an automated visual inspection (AVI) model, such an AVI neural network for image classification. In one aspect, an arithmetic transposition algorithm is used to generate synthetic images from original images by transposing features (e.g., defects) onto the original images, with pixel-level realism. In other aspects, digital inpainting techniques are used to generate realistic synthetic images from original images. Deep learning-based inpainting techniques may be used to add, remove, and/or modify defects or other depicted features. In still other aspects, quality control techniques are used to assess the suitability of image libraries for training and/or validation of AVI models, and/or to assess whether individual images are suitable for inclusion in such libraries.

Abstract: Disclosed is a high performance, low cost antenna for wireless communication applications which benefit from a dual feed diversity antenna. The antenna device can be fabricated from a single layer of conductive material, thus allowing easy, low cost manufacture of a high gain antenna. Antenna embodiments may provide both spatial and polarization diversity. The antenna need not be planar, but rather may be bent or formed, such as to provide an antenna which is conformal with the shape of a wireless communication device. Furthermore, other embodiments of the present invention may be made of thin film, conductive foil, vapor deposition, or could be made of a flexible conductive material, such as metallized MYLAR. Each of the slot elements may be linear or may be formed in a meander shape or other shape to reduce size. The slot elements may be provided within an antenna array useful for beam scanning applications.

Abstract: Disclosed is a high performance, low cost antenna for wireless communication applications such as those using the 802.11 wireless communication protocol, or other such wireless protocols, which benefit from a dual feed diversity antenna. The antenna device can be fabricated from a single layer of conductive material, thus allowing easy, low cost manufacture of a high gain antenna. In one embodiment of the present invention, the diversity slot antenna can be formed using a single piece of stamped metal connected to a feed system, such as a coaxial feed line. In a first embodiment an antenna with spatial diversity is disclosed. In a second embodiment, an antenna having both spatial and polarization diversity is provided. In other embodiments, the antenna need not be planar, but rather may be bent or formed, such as to provide an antenna which is conformal with the shape of a wireless communication device.

Abstract: A dual frequency wideband antenna assembly for use in a wireless communication device. The antenna assembly having a first resonator element disposed away from the ground plane element, said first resonator element being operatively coupled at a first location to the ground plane and being operatively coupled at a second location to the RF signal port; a second resonator element disposed away from the ground plane. The first and second resonator elements are coupled via a bridge conductor and a capacitive tuning network. The capacitive tuning network may include a discrete capacitor or an adjustable capacitor which varies in response to a signal.