Abstract: Methods for switchable matrix barcodes for secure website access is described herein. In one aspect, a method of accessing a secure webpage by a user device can include scanning a first switchable matrix barcode by the user device; identifying a first URL sequence unique to the first switchable matrix barcode based on a deconstruction of the first switchable matrix bar code; and accessing a webpage corresponding to the first URL sequence based at least on whether the accessing occurs within a predefined expiration period of the first URL sequence.

Abstract: Methods for switchable matrix barcodes for secure website access is described herein. In one aspect, a method of accessing a secure webpage by a user device can include scanning a first switchable matrix barcode by the user device; identifying a first URL sequence unique to the first switchable matrix barcode based on a deconstruction of the first switchable matrix bar code; and accessing a webpage corresponding to the first URL sequence based at least on whether the accessing occurs within a predefined expiration period of the first URL sequence.

Abstract: A hybrid firearm receiver includes a receiver body having a first end, a second end opposite the first end, a substantially planar bottom surface extending from the first end to the second end and transitioning to two upwardly extending opposing sidewalls, and a top end, the receiver body extending along a longitudinal axis from the first end to the second end. The first end is integrally formed with the receiver body and includes a circular first cavity and a smaller circular second cavity below the circular first cavity. The second end includes an aperture. The axis extends through a center of the circular first cavity and through the aperture and is below the top end. The circular first cavity may be configured to receive a portion of an AR-15 rifle stock assembly. The aperture may be configured to receive an AK pattern rifle barrel.

Abstract: A hybrid firearm receiver includes a receiver body having a first end, a second end opposite the first end, a substantially planar bottom surface extending from the first end to the second end and transitioning to two upwardly extending opposing sidewalls, and a top end, the receiver body extending along a longitudinal axis from the first end to the second end. The first end is integrally formed with the receiver body and includes a circular first cavity and a smaller circular second cavity below the circular first cavity. The second end includes an aperture. The axis extends through a center of the circular first cavity and through the aperture and is below the top end. The circular first cavity may be configured to receive a portion of an AR-15 rifle stock assembly. The aperture may be configured to receive an AK pattern rifle barrel.

Abstract: A computer implemented method, apparatus, and computer usable program code for designing a product using technology readiness levels for materials. Entries identifying materials and technology readiness levels for the materials are stored in a database. A first design is developed using a first material selected from the database, wherein the first material has a first technology readiness level identified from the database. A second design is developed using a second material selected from the database, wherein the second material has a second technology readiness level identified from the database. The first design is compared to the second design using the first technology readiness level and the second technology readiness level to form a comparison. A selection is made between the first design and the second design using the comparison.