Abstract: A dental model, includes (a) an upper segment, the upper segment having a shape corresponding to at least a portion of a dental arch of a human patient; (b) a base segment having an external surface and a bottom surface; (c) at least one internal cavity formed in the base segment, and optionally the upper segment, the at least one internal cavity extending through the bottom surface; and (d) at least one wash channel extending from the external surface of the base segment through the base segment and into the at least one internal cavity.

Abstract: A computerized age-verification method, comprising: receiving an electronic request for verification of a user associated with a user device; opening a browser window in a browser running on the user device; attempting to open a URL listed on a directory of restricted URLs; responsive to receipt of a message denying opening of the URL, returning an indication that the user is not verified; and responsive to receipt of an indication that the URL opens, returning an indication that the user is verified.

Abstract: A computerized method for securely verifying age of users of remote devices interacting with provider resources includes receiving a request for age verification of the user; providing directly to the user device an interface for input of identifying data; receiving, from the user device, identifying data; providing, to a third party verification source, the identifying data; receiving, from the third party verification source, an indication of confirmation of the identifying data; determining, based on the received indication, whether a confidence level has been met; responsive to determining that a confidence level as been met, causing a token indicative of age verification to be generated; providing the token to the user device; providing a positive indication to the provider system, including identification of the token, and anonymizing user-identifiable data.

Abstract: A computerized method for securely verifying age of users of remote devices interacting with provider resources includes receiving a request for age verification of the user; providing directly to the user device an interface for input of identifying data; receiving, from the user device, identifying data; providing, to a third party verification source, the identifying data; receiving, from the third party verification source, an indication of confirmation of the identifying data; determining, based on the received indication, whether a confidence level has been met; responsive to determining that a confidence level as been met, causing a token indicative of age verification to be generated; providing the token to the user device; providing a positive indication to the provider system, including identification of the token, and anonymizing user-identifiable data.

Abstract: Use of a viscosity increasing component in a diesel fuel composition, for the purpose of improving the fuel economy of an engine into which the fuel composition is or is intended to be introduced, or of a vehicle powered by such an engine, wherein the viscosity increasing component is a viscosity index (VI) improving additive, wherein the VI improving additive comprises a linear block copolymer, which contains one or more monomer blocks selected from ethylene, propylene, butylene, butadiene, isoprene and styrene monomers and wherein the VI improving additive is used at a concentration of from 0.001% w/w to 0.05% w/w.

Abstract: A fuel composition comprising a base fuel and at least one viscosity index (VI) improving additive, wherein the viscosity index (VI) improving additive is a functionalized dispersant olefin copolymer. The viscosity index (VI) improving additive provides improved power output and/or acceleration characteristics.

Abstract: A dental model, includes (a) an upper segment, said upper segment having a shape corresponding to at least a portion of a dental arch of a human patient; (b) a base segment having an external surface and a bottom surface; (c) at least one internal cavity formed in said base segment, and optionally said upper segment, said at least one internal cavity extending through said bottom surface; and (d) at least one wash channel extending from said external surface of said base segment through said base segment and into said at least one internal cavity.

Abstract: A dental model, includes (a) an upper segment, the upper segment having a shape corresponding to at least a portion of a dental arch of a human patient; (b) a base segment having an external surface and a bottom surface; (c) at least one internal cavity formed in the base segment, and optionally the upper segment, the at least one internal cavity extending through the bottom surface; and (d) at least one wash channel extending from the external surface of the base segment through the base segment and into the at least one internal cavity.

Abstract: A computerized method for securely verifying age of users of remote devices interacting with provider resources includes receiving a request for age verification of the user; providing directly to the user device an interface for input of identifying data; receiving, from the user device, identifying data; providing, to a third party verification source, the identifying data; receiving, from the third party verification source, an indication of confirmation of the identifying data; determining, based on the received indication, whether a confidence level has been met; responsive to determining that a confidence level as been met, causing a token indicative of age verification to be generated; providing the token to the user device; providing a positive indication to the provider system, including identification of the token, and anonymizing user-identifiable data.

Abstract: Use of a viscosity increasing component in a diesel fuel composition, for the purpose of improving the fuel economy of an engine into which the fuel composition is or is intended to be introduced, or of a vehicle powered by such an engine, wherein the viscosity increasing component is a viscosity index (VI) improving additive, wherein the VI improving additive comprises a linear block copolymer, which contains one or more monomer blocks selected from ethylene, propylene, butylene, butadiene, isoprene and styrene monomers and wherein the VI improving additive is used at a concentration of from 0.001% w/w to 0.05% w/w.

Abstract: A fuel composition comprising a base fuel and at least one viscosity index (VI) improving additive, wherein the viscosity index (VI) improving additive is a functionalized dispersant olefin copolymer. The viscosity index (VI) improving additive provides improved power output and/or acceleration characteristics.

Abstract: A fuel composition comprising a base fuel and at least one viscosity index (VI) improving additive, wherein the viscosity index (VI) improving additive is a star-shaped polyisoprene-based polymer. The viscosity index improving additive can be used in a fuel composition to provide improved lubricity as well as providing improved power output and/or acceleration characteristics.

Abstract: A computerized method for securely verifying age of users of remote devices interacting with provider resources includes receiving a request for age verification of the user; providing directly to the user device an interface for input of identifying data; receiving, from the user device, identifying data; providing, to a third party verification source, the identifying data; receiving, from the third party verification source, an indication of confirmation of the identifying data; determining, based on the received indication, whether a confidence level has been met; responsive to determining that a confidence level as been met, causing a token indicative of age verification to be generated; providing the token to the user device; providing a positive indication to the provider system, including identification of the token, and anonymizing user-identifiable data.

Abstract: A dental model, includes (a) an upper segment, said upper segment having a shape corresponding to at least a portion of a dental arch of a human patient; (b) a base segment having an external surface and a bottom surface; (c) at least one internal cavity formed in said base segment, and optionally said upper segment, said at least one internal cavity extending through said bottom surface; and (d) at least one wash channel extending from said external surface of said base segment through said base segment and into said at least one internal cavity.

Abstract: The invention provides a ferroelectric liquid crystal display with uniformly spaced greyscale levels. The invention uses a bistable ferroelectric liquid crystal display formed by a layer of chiral smectic liquid crystal material between two cell walls. The walls carry e.g. line and column electrodes to give an x,y matrix of addressable pixels, and are surface treated to provide bistable operation. Each pixel may be divided into subpixels thereby giving spatial weighting for greyscale. Temporal weighting of greyscale is obtained by switching a pixel to a dark state for time T1 and a light state for time T2. When T1 and T2 are not equal, four different greyscales are obtainable; i.e. dark, dark grey, light grey, and light. The present invention provides a required uniform spacing of greyscale levels by addressing each pixel two or more times in one frame time.