Abstract: Systems, methods, and computer-readable media for simulating the course of an event or for collecting data for the simulation are provided. A processing unit can receive attributes of synthetic populations and corresponding forecasts of progress of an event, e.g., an epidemic. The processing unit can determine a disease model based on the forecasts and historical data of the event. The disease model can be associated with at least one attribute of each of the synthetic populations. The processing unit can determine a forecast of the progress of the event based on the received forecasts and weights associated with user accounts. In some examples, the processing unit can receive the attributes, present via a user interface a plurality of candidate forecasts of an epidemic, and receive via the user interface a forecast, e.g., rankings or data, of the epidemic with respect to the synthetic population indicated by the attributes.

Abstract: Shroud assemblies and methods for modifying modal vibrations associated with a turbine are described. A shroud assembly includes an inner shroud and an outer shroud. The inner shroud includes a body with a first end portion, a second end portion opposite to the first end portion, an upper surface and a lower surface, wherein the lower surface is adjacent to a plurality of rotating turbine blades. The inner shroud further includes at least two rails formed on the upper surface and extending between the first end portion and the second end portion, wherein an impingement cooling area is defined between the at least two rails. Additionally, the inner shroud includes at least one cross-member formed on the upper surface in a direction transverse to the at least two rails.

Abstract: A stator shroud segment is provided that includes an outer shroud having a leading edge groove and a trailing edge groove; and a plurality of inner shrouds each having a leading edge hook and a trailing edge hook, the leading and trailing hooks of each of the inner shrouds being respectively engaged with the leading and trailing edge grooves of the outer shroud so as to axially and radially lock the inner shrouds to the outer shrouds. At least one of the trailing edge hook of the inner shroud and the trailing edge groove of the outer shroud includes a sloped surface disposed at an angle to an axial direction of the rotor and to a radial direction of the rotor and facing the other of the inner and outer shrouds whereby a radial inward force on the inner shroud is transformed into a force in axial and radial directions to force the inner shroud to tightly seal a radial gap between the inner and outer shrouds.

Abstract: Shroud assemblies and methods for modifying modal vibrations associated with a turbine are described. A shroud assembly includes an inner shroud and an outer shroud. The inner shroud includes a body with a first end portion, a second end portion opposite to the first end portion, an upper surface and a lower surface, wherein the lower surface is adjacent to a plurality of rotating turbine blades. The inner shroud further includes at least two rails formed on the upper surface and extending between the first end portion and the second end portion, wherein an impingement cooling area is defined between the at least two rails. Additionally, the inner shroud includes at least one cross-member formed on the upper surface in a direction transverse to the at least two rails.

Abstract: A stator shroud segment is provided that includes an outer shroud having a leading edge groove and a trailing edge groove; and a plurality of inner shrouds each having a leading edge hook and a trailing edge hook, the leading and trailing hooks of each of the inner shrouds being respectively engaged with the leading and trailing edge grooves of the outer shroud so as to axially and radially lock the inner shrouds to the outer shrouds. At least one of the trailing edge hook of the inner shroud and the trailing edge groove of the outer shroud includes a sloped surface disposed at an angle to an axial direction of the rotor and to a radial direction of the rotor and facing the other of the inner and outer shrouds whereby a radial inward force on the inner shroud is transformed into a force in axial and radial directions to force the inner shroud to tightly seal a radial gap between the inner and outer shrouds.

Abstract: In one aspect, the present invention provides a method for labeling a terminal olefin, the method comprising a step of treating a terminal olefin substrate having the structure: with a labeled ethylene reagent in the presence of a suitable catalyst under suitable olefin metathesis reaction conditions to form a labeled terminal olefin having the structure: wherein RA and RB are independently hydrogen, or an aliphatic, alicyclic, heteroaliphatic, heterocyclic, aryl or heteroaryl moiety, with the proviso that RA and RB are not each hydrogen, or RA and RB taken together with the carbon atom to which they are attached form an alicyclic or heterocyclic moiety; and * denotes the presence of an isotopic label on the terminal carbon atom.