Abstract: A computer system displays a first object that includes at least a first portion of the first object and a second portion of the first object and detects a first gaze input that meets first criteria, wherein the first criteria require that the first gaze input is directed to the first portion of the first object in order for the first criteria to be met. In response, the computer system displays a first control element that corresponds to a first operation associated with the first object, wherein the first control element was not displayed prior to detecting that the first gaze input met the first criteria, and detects a first user input directed to the first control element. In response to detecting the first user input directed to the first control element, the computer system performs the first operation with respect to the first object.

Abstract: Examples of the present disclosure relate to a container. The container has a chamber for storing build material for a three-dimensional printing system. The container comprises an opening coaxial with the chamber for coupling to the three-dimensional printing system. The container is configured such that rotation of the chamber in a first direction conveys build material in the chamber to the three-dimensional printing system and rotation of the chamber in a second direction conveys the build material away from the three-dimensional printing system.

Abstract: According to one aspect, there is provided a method of adding build material to a rotatable 3D printing build material container having an internal build material storage reservoir, the method comprising: providing a supply of build material to an input port of the container; rotating the container about its rotation axis at a first speed sufficient to cause build material within the container to be centrifugally forced against the outside of the internal storage reservoir.

Abstract: In one example, a liquid-gas separator includes a composite membrane to pass a gas but not a liquid at a first pressure difference across the membrane and to block the gas passing back through the membrane at a second pressure difference smaller than the first pressure difference.

Abstract: According to one aspect, there is provided a method of adding build material to a rotatable 3D printing build material container having an internal build material storage reservoir, the method comprising: providing a supply of build material to an input port of the container; rotating the container about its rotation axis at a first speed sufficient to cause build material within the container to be centrifugally forced against the outside of the internal storage reservoir.

Abstract: Examples of the present disclosure relate to a container. The container has a chamber for storing build material for a three-dimensional printing system. The container comprises an opening coaxial with the chamber for coupling to the three-dimensional printing system. The container is configured such that rotation of the chamber in a first direction conveys build material in the chamber to the three-dimensional printing system and rotation of the chamber in a second direction conveys the build material away from the three-dimensional printing system.

Abstract: In one example, a liquid-gas separator includes a composite membrane to pass a gas but not a liquid at a first pressure difference across the membrane and to block the gas passing back through the membrane at a second pressure difference smaller than the first pressure difference.

Abstract: A compound is disclosed. The compound has the general structure: wherein Y is selected from the group consisting of hydrocarbons, hydrocarbons including nitrogen in the carbon backbone, and hydrocarbons including oxygen in the carbon backbone; wherein R1 and R2 are each independently selected from the group consisting of hydrogen, linear hydrocarbons, branched hydrocarbons, and cyclic hydrocarbons and wherein R1 and R2 are not both hydrogen; wherein X is selected from the group consisting of CH2, O, N—R3, S, and nothing and wherein R3 is selected from the group consisting of hydrogen, branched hydrocarbons, linear hydrocarbons, and cyclic hydrocarbons; wherein m is an integer between 1 and 50, inclusive; wherein n is an integer between 1 and 10,000, inclusive; and wherein p, q, and z are each independently an integer greater than 0.

Abstract: A compound is disclosed. The compound has the general structure: wherein Y is selected from the group consisting of hydrocarbons, hydrocarbons including nitrogen in the carbon backbone, and hydrocarbons including oxygen in the carbon backbone; wherein R1 and R2 are each independently selected from the group consisting of hydrogen, linear hydrocarbons, branched hydrocarbons, and cyclic hydrocarbons and wherein R1 and R2 are not both hydrogen; wherein X is selected from the group consisting of CH2, O, N—R3, S, and nothing and wherein R3 is selected from the group consisting of hydrogen, branched hydrocarbons, linear hydrocarbons, and cyclic hydrocarbons; wherein m is an integer between 1 and 50, inclusive; wherein n is an integer between 1 and 10,000, inclusive; and wherein p, q, and z are each independently an integer greater than 0.

Abstract: A photographic element comprising a support having provided thereon a light-sensitive layer, a transparent magnetic recording layer, and a transparent reinforced filler layer coated over the transparent magnetic recording layer, the transparent magnetic recording layer comprising a transparent polymeric binder and ferro-magnetic particles, the magnetic particles having a surface area greater than 30 m.sup.2 /gm and a coverage of from about 1.times.10.sup.-11 mg/.mu.m.sup.3 to about 3.times.10.sup.-10 mg/.mu.m.sup.3, the transparent reinforced filler layer comprising a transparent polymeric binder and filler particles, the filler particles having a median diameter of less than 0.15 .mu.m, a Mobs hardness of at least 6 and being present in an amount of from about 20 to about 300 percent by weight based on the weight of the polymeric binder.

Abstract: The present invention comprises a restraining harness for use on school buses, vans and other vehicles having a pair of straps and means for removably interconnecting the ends of the straps around the seat back for securingly attaching the harness to the seat back. A plurality of generally parallel, aligned loops are formed on each strap with a waist belt and a chest belt extending through respective pairs of generally aligned loops. The ends of the belts are connected together by means of material including minute hook members and pile or loop members on the other of the belt end.