Abstract: Provided herein are compounds of Formula (I), their pharmaceutically acceptable salts, and their pharmaceutical compositions: wherein R1, R2, R3a, R3b, R4, R5, and A are defined in the present disclosure. The compounds are potent inhibitors of the main protease (Mpro) of severe acute respiratory syndrome Coronavirus-2 (SARS-CoV-2), and they are useful in treating or preventing COVID-19 in a subject.

Abstract: A motor drive or bus supply power conversion system includes a rectifier with at least one rectifier switch module for rectifying AC input power. A DC bus is connected to the rectifier and supplies DC output power. An optional inverter is connected to the DC bus and includes at least one inverter switch module for inverting the DC bus voltage to an AC output power. The at least one rectifier switch module and the at least one inverter switch module each include a base plate and a housing connected to the base plate. The housing defines an interior space that contains at least one semiconductor switch. Anti-corrosion features are provided including a conformal coating on printed circuit board assemblies, removable connector covers, dielectric grease coated connections, nano-coated fiber optic transceivers, and an exterior protective film wrap.

Abstract: A drumstick having an attachment to strap it to the thumb of the drummer. The attachment also goes through a hole in the drumstick to allow the stick to freely rotate in its proper plane of motion, allowing the drummer the chance to practice drumming without overly squeezing the drumstick as well as playing the drums with no risk of dropping the drumsticks.

Abstract: A drumstick having an attachment to strap it to the thumb of the drummer. The attachment also goes through a hole in the drumstick to allow the stick to freely rotate in its proper plane of motion, allowing the drummer the chance to practice drumming without overly squeezing the drumstick as well as playing the drums with no risk of dropping the drumsticks.

Abstract: The present invention provides an improved product holding and dispensing package and an improved method for manufacturing, holding, and storing products, especially comestible products. In an embodiment, a package for comestible products may be provided. The package includes a package blank having walls that define a package interior. The package also includes a sheet disposed inside the package interior. The sheet wraps around a stack of comestible products and maintains the products in a stacked formation. The sheet also retains the comestible products against lateral movement within the sheet. In an embodiment, the plurality of comestible products are releasably attached to the sheet to prevent the comestible products from sliding out of the sheet. In an embodiment, the sheet may be attached to the package interior.