This disclosure involves a method of controlling a safety critical control device, the method comprising: sending user inputs to a first state machine, identifying user inputs by the first state machine, determining the correct state to communicate to a second state machine, the correct state being determined by selecting one state of a plurality of states depending on the user inputs, communicating the correct state to a second state machine through a control bus, and determining the correct state for the second state machine based on communication from the control bus.

This disclosure involves a method of controlling a safety critical control device, the method comprising: sending user inputs to a first state machine, identifying user inputs by the first state machine, determining the correct state to communicate to a second state machine, the correct state being determined by selecting one state of a plurality of states depending on the user inputs, communicating the correct state to a second state machine through a control bus, and determining the correct state for the second state machine based on communication from the control bus.

This disclosure involves a method of controlling a safety critical control device, the method comprising: sending user inputs to a first state machine, identifying user inputs by the first state machine, determining the correct state to communicate to a second state machine, the correct state being determined by selecting one state of a plurality of states depending on the user inputs, communicating the correct state to a second state machine through a control bus, and determining the correct state for the second state machine based on communication from the control bus.

In some embodiments, the present disclosure pertains to methods of forming calcium-silicate-hydrate particles by mixing a calcium source with a silicate source. In some embodiments, the mixing comprises sonication. In some embodiments, the mixing occurs in the presence of a surfactant and a solvent. In some embodiments, the methods of the present disclosure further comprise a step of controlling the morphology of the calcium-silicate-hydrate particles. In some embodiments, the step of controlling the morphology of calcium-silicate-hydrate particles comprises selecting a stoichiometric ratio of the calcium source over the silicate source. In some embodiments, the formed calcium-silicate-hydrate particles have cubic shapes. In some embodiments, the formed calcium-silicate-hydrate particles have rectangular shapes. In some embodiments, the formed calcium-silicate-hydrate particles are in the form of self-assembled particles of controlled shapes. Additional embodiments of the present disclosure pertain to compositions that contain the calcium silicate-hydrate particles of the present disclosure.

In some embodiments, the present disclosure pertains to methods of forming calcium-silicate-hydrate particles by mixing a calcium source with a silicate source. In some embodiments, the mixing comprises sonication. In some embodiments, the mixing occurs in the presence of a surfactant and a solvent. In some embodiments, the methods of the present disclosure further comprise a step of controlling the morphology of the calcium-silicate-hydrate particles. In some embodiments, the step of controlling the morphology of calcium-silicate-hydrate particles comprises selecting a stoichiometric ratio of the calcium source over the silicate source. In some embodiments, the formed calcium-silicate-hydrate particles have cubic shapes. In some embodiments, the formed calcium-silicate-hydrate particles have rectangular shapes. In some embodiments, the formed calcium-silicate-hydrate particles are in the form of self-assembled particles of controlled shapes. Additional embodiments of the present disclosure pertain to compositions that contain the calcium silicate-hydrate particles of the present disclosure.

The disclosure belongs to the technical field of materials for civil construction engineering, and specifically relates to a green and low carbon emission foamed lightweight soil prepared by using serpentine, magnesium oxide and CO.sub.2 as raw materials. In the serpentine carbon sequestration foamed lightweight soil, the ingredients of raw material include: magnesium oxide, serpentine, a filler, CO.sub.2 bubbles and water.

The disclosure belongs to the technical field of materials for civil construction engineering, and specifically relates to a green and low carbon emission foamed lightweight soil prepared by using serpentine, magnesium oxide and CO.sub.2 as raw materials. In the serpentine carbon sequestration foamed lightweight soil, the ingredients of raw material include: magnesium oxide, serpentine, a filler, CO.sub.2 bubbles and water.

This invention relates to the field of thermal insulation. In particular, the invention describes superinsulation articles having a desired porosity, reduced pore size and cost-effective methods for manufacturing such articles. In one aspect of the present invention, the article may comprise a material system with at least about 20% porosity. In a further aspect of the invention, an article may comprise greater than about 25% of nanopores having a pore size no greater than about 1500 nanometers in its shortest axis.

This invention relates to the field of thermal insulation. In particular, the invention describes superinsulation articles having a desired porosity, reduced pore size and cost-effective methods for manufacturing such articles. In one aspect of the present invention, the article may comprise a material system with at least about 20% porosity. In a further aspect of the invention, an article may comprise greater than about 25% of nanopores having a pore size no greater than about 1500 nanometers in its shortest axis.

A method of cementing an annular space between a pipe string and a well bore, the method comprising the steps of (a) providing a cement composition including a calcium-deficient calcium silicate; (b) mixing the cement composition with water to form a cement slurry; (c) mixing the cement slurry composition with carbon dioxide form a foamed cement; and (d) placing the foamed cement in the annular space between the pipe string and the wellbore.