Abstract: There is provided a perovskite material A perovskite material having the formula (I): AaA?bA?cSn(y)Pb(1-y)X3 (I) wherein A consists of a monovalent cation; A? consists of a monovalent organic cation having an ionic radius greater than 2.53 ?; A? consists of a monovalent inorganic cation; X comprises one or more halide anions; 0<a<1; 0<b<1; 0?c<1; a+b+c=1; and 0<y<1. Also provided is a semiconductor device having a photoactive region comprising a perovskite material as defined herein; a semiconductor device which is a photovoltaic device; and a multijunction photovoltaic device comprising two or more sub-cells, wherein the first sub cell comprises a photovoltaic device as defined herein and a further sub-cell comprising a photoactive layer having a bandgap of between 1.5 and 1.9 eV.

Abstract: Approaches presented herein provide systems and methods for a data platform to identify, evaluate, and map data for processing via one or more compute instances. The data platform may receive an instruction and retrieve data from a variety of remote data locations. The data may be processed, such as to label or file the data, and then streamed to a compute instance for further evaluation. The data platform may be used to provide a centralized system for managing system data that combine both legacy and modern storage solutions into a single integrated platform.

Abstract: An electronic security scheme and security system for a communications network facilitates the preventing of unauthorized access to an internal resource of an entity's internal computer system. A server includes a first set of ports for communication between an external communications network and the server. The server has a second set of ports for communications between an internal communications network and the server. A first firewall is interposed between the server and the external communications network. The first firewall is coupled to the first set of ports to provide at least one interconnection between the first set of ports and the external communications network. A second firewall is interposed between the server and the internal communications network. In one embodiment, the second firewall is coupled to the second set of ports to provide in a nonnegative integer number of interconnections between the second of set ports and the internal communications network.