Abstract: Additive manufacturing's reliance on embedded computing renders it vulnerable to tampering through cyber-attacks. Sensor instrumentation of additive manufacturing devices allows for rigorous process and security monitoring, but also results in a massive volume of noisy data for each run. As such, in-situ, near-real-time anomaly detection is challenging. A probabilistic-model-based approach addresses this challenge.

Abstract: A method for creating a tamper-evident label is described. Embodiments of the method or process typically include four steps. In a first step, an ultraviolet cured ink mask can be printed onto a substrate by an inkjet printer. In a second step, once the printing is done and the mask has been formed, the substrate can be anodized in a weakened anodizing bath. In a third step, the ultraviolet cured ink can be removed from the substrate leaving a portion of the substrate unanodized. To remove the ultraviolet cured ink, the substrate can be heated to an elevated temperature and a cleaning solution and/or solvent can be applied to the ultraviolet cured ink mask. In a fourth step, the substrate can be anodized for a second time.

Abstract: A method for creating a tamper-evident label is described. Embodiments of the method or process typically include four steps. In a first step, an ultraviolet cured ink mask can be printed onto a substrate by an inkjet printer. In a second step, once the printing is done and the mask has been formed, the substrate can be anodized in a weakened anodizing bath. In a third step, the ultraviolet cured ink can be removed from the substrate leaving a portion of the substrate unanodized. To remove the ultraviolet cured ink, the substrate can be heated to an elevated temperature and a cleaning solution and/or solvent can be applied to the ultraviolet cured ink mask. In a fourth step, the substrate can be anodized for a second time.

Abstract: Described herein is a multi-layered security seal having a first outer portion having a first area and a second outer portion having an equivalent area. A nonlinear center portion is positioned between the first outer portion and the second outer portion. The first outer portion, the second outer portion, and the nonlinear center portion form a single unit. The security seal has an adhesive at least partially disposed on an underside of each of the first portion, the second portion and/or the nonlinear center portion. A covert message disposed on at least one layer of the multi-layered security seal. The covert message is displayed through an upper layer of the multi-layered security seal when the multi-layer security seal is at least partially removed from an item on which it has been adhered or upon movement of an item onto which the security seal has been placed.

Abstract: A phase- or frequency-locked loop circuit (200) that generates an accurate output signal (ACC_SYN_OUT) even in the presence of edge-triggering-type glitches (148, 304A, 304B) in the input reference clock signal (REF_CLK). The locked-loop circuit includes a phase or frequency difference detector (216) and a glitch detector (208) that generates a trigger signal (GLITCH_DETECTED) upon detection of at least one glitch. The trigger signal resets the difference detector so as to abort the updating of the output signal that the glitch would otherwise cause.

Abstract: An adhesive tape for flexographic printing including a first adhesive layer, a substrate on the first adhesive layer, and a second adhesive layer on the substrate. The substrate preferably includes a polymeric film layer and a foam layer, wherein the topography of the first and second adhesive layers is substantially independent of the topography of the polymeric film layer. The polymeric film is preferably substantially smooth, and at least one of the first and second adhesive layers is preferably substantially continuous and includes a regular pattern of permanent grooves. The grooves preferably have a depth of about 4 &mgr;m to about 200 &mgr;m, and a width of about 4 &mgr;m to about 200 &mgr;m.

Abstract: An adhesive tape for flexographic printing including a first adhesive layer, a substrate on the first adhesive layer, and a second adhesive layer on the substrate. The substrate preferably includes a polymeric film layer and a foam layer, wherein the topography of the first and second adhesive layers is substantially independent of the topography of the polymeric film layer. The polymeric film is preferably substantially smooth, and at least one of the first and second adhesive layers is preferably substantially continuous and includes a regular pattern of permanent grooves. The grooves preferably have a depth of about 4 &mgr;m to about 200 &mgr;m, and a width of about 4 &mgr;m to about 200 &mgr;m.

Abstract: A high density, high performance circuit fabricated with a copper/epoxy structure. The circuit is well suited for an integrated circuit interconnect device. Fluorene-containing epoxy resins may be used to obtain certain material and processing advantages over copper/polyimide structures. The circuit structure resides on a substrate which may be ceramic, a semiconductor such as silicon, or, advantageously, a cured epoxy resin.

Abstract: A fiber reinforced composite structure having a glass transition temperature greater than 150.degree. C. is comprised of:a) reinforcing fiber andb) a curable epoxy resin composition comprising(i) one or more epoxides having more than one epoxide group per molecule, of which epoxides at least 10 percent by weight is a 9,9-bis[4-(2,3-epoxypropoxy)phenyl]fluorene, all of the fluorene epoxy present being free of ortho substitution;(ii) an effective amount of one or more epoxy curing agents.