Abstract: Systems and methods for virtual learning environments, such as those, for example, configured to assist in evaluating a user, including the competency of a user, in a field of interest.

Abstract: A lens for reforming radiation from a light-emitting diode having a first convex surface for admitting radiation path from the light-emitting diode that is close to the axis of the diode and a cylindrical surface for admitting radiation that makes a wider angle with the axis of the diode, a conical surface disposed to receive and totally internally reflect radiation admitted by said convex surface and re-radiate it at an angle substantially normal to the axis of the diode and a curved surface for receiving and re-radiating at an angle substantially normal to the axis of the diode radiation admitted by the cylindrical surface.

Abstract: The invention concerns some type of reflecting mirror that can be utilized as rear-view mirrors for automobiles. Such a mirror is made up of: one layer of amorphous material, not pyrolytic, with refraction index greater than 3.4 and lower than 3.8; one or more layers of materials having refraction index comprised between 1.3 and 1.5. This multi-layer may contain also: one or more layers of materials with refraction index comprised between 2.9 and 2.4; one high reflection layer of metallic type; one absorbent layer. Proposed mirrors, for the optical characteristics and for the disposition of the components, however they have an integral reflection superior to that of the already known other anti-glaring mirrors, they present a glaring in night vision lower than that one of the already known mirrors, because they reduce selectively spectral range to which human eye is more sensible.

Abstract: A repair process for superalloy articles is described. Worn or cracked or otherwise defective areas at the surface of a superalloy component are repaired using vapor deposition to apply a repair filler material to the defect.

Abstract: A multi-size pill dispenser comprises an enclosing cabinet within which are formed a plurality of horizontally juxtaposed pill containing hoppers. Each hopper terminates downwardly in a square opening through which the pills can drop by gravity. A slide is reciprocal below each hopper and includes a triangularly shaped window, portions of which can be urged into registry beneath the hopper opening. An adjustable stop is provided to limit the forward movement of the slide relative to the hopper opening whereby the area of the slide triangular window which can be pulled into registry below the hopper opening can be precisely controlled to regulate both the size and number of pills that can be dispensed from each hopper upon each reciprocation of a slide. By adjusting the forward limit of travel of each of the slides, various sizes and types of pills or other articles can be dispensed, one at a time, from the plurality of hoppers.