Abstract: A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.

Abstract: A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.

Abstract: A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.

Abstract: A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.

Abstract: A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.

Abstract: A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.

Abstract: The present disclosure relates to a holder for a condom having a tip. The holder may include a closable pocket for pinching the tip of the condom when the pocket is closed and a shield region adjacent to the closable pocket for covering the outer surface of the condom when the condom holder is in use. The present disclosure further relates to a method of packaging a condom having a tip. The method may include the steps of pinching the tip in a closable pocket of a holder, and completely covering the outer surface of the condom with a shield region of the holder. The holder may include a first strip with a first end and a second strip with a first end, wherein the first strip is joined to the second strip, and wherein the closable pocket is formed between the first strip and the second strip.

Abstract: A hand-squeezable dispenser comprises a holder (2) of inverted-U configuration having outwardly-sprung limbs (20,21) which enclose a folded paper-card container (1) of liquid, particulate or other flowable material. A blade (23) and inside ridge (31) of one limb (20) engage, respectively, in a circumferential pocket (12) and under a circumferential shoulder (11) of the front container-wall (7). The other limb (21) is pushed in against the back container-wall (8) to engage a ridge (32) under the shoulder (11) and allow a slide (26) to be slid down into the pocket (12). A finger (25) of the slide (26) obstructs closure of a lid (24) until the pocket (12) is engaged by the slide (26), closure of the lid (24) piercing the container seal (14) with a projecting tube (34) of a sealing cap (33) on the underside of the lid (24). Dispensing is effected by opening the lid (24) and squeezing the limbs (20,21) inwardly, the container (1) recovering its shape afterwards under the outward springing of the limbs (20,21).