Abstract: An enzymatic electrochemical sensor for the detection of blood propofol is provided.

Abstract: A lighting system includes an upper housing supporting a light engine, and a diffuser coupled to the upper housing. The diffuser may be monolithic, i.e. formed of a single material as a single piece without joints or seams where separate components are joined. The monolithic diffuser may be formed by an additive manufacturing process, for example 3D printing. The diffuser may couple to the upper housing with a tool-less connection. The portion of the tool-less connection defined by the diffuser may be formed by the additive manufacturing process. The lighting system may further include a lens coupled to the diffuser opposite the upper housing with a lens retaining ring. The lens retaining ring may be formed with an additive manufacturing process, and may define an annular snap-fit with the diffuser.

Abstract: A lighting system includes an upper housing supporting a light engine, and a diffuser coupled to the upper housing. The diffuser may be monolithic, i.e. formed of a single material as a single piece without joints or seams where separate components are joined. The monolithic diffuser may be formed by an additive manufacturing process, for example 3D printing. The diffuser may couple to the upper housing with a tool-less connection. The portion of the tool-less connection defined by the diffuser may be formed by the additive manufacturing process. The lighting system may further include a lens coupled to the diffuser opposite the upper housing with a lens retaining ring. The lens retaining ring may be formed with an additive manufacturing process, and may define an annular snap-fit with the diffuser.

Abstract: A biosensor comprising a swellable biologically sensitive element comprising a nucleic acid probe and a physicoelectrical transducer associated with the swellable biologically sensitive element. The physicoelectrical transducer converts the swelling of the swellable biologically sensitive element into a detectable electrical property. In preferred embodiments the biosensor comprises an oligonucleotide cross-linked polymer composite mounted on a suitable substrate comprising electrodes adapted to measure electrical impedance. Associated methods and devices comprising said biosensor are also provided.

Abstract: A canary value is used to validate a message from a non-web browser client application to a web server providing web services to mitigate cross-site forgery attacks. The canary value is generated by the server in party by applying a hash function to a user identifier and a time stamp. The server provides the canary value to the client application in response to receiving a message that does not have a canary or has an expired canary. The client application upon receiving an error message with a canary message will resend the prior message with the canary value present. The client application caches the canary value for subsequent messages until a new canary value is received. The canary value allows the server to ignore messages generated by the client application under control of an attacker.

Abstract: A canary value is used to validate a message from a non-web browser client application to a web server providing web services to mitigate cross-site forgery attacks. The canary value is generated by the server in party by applying a hash function to a user identifier and a time stamp. The server provides the canary value to the client application in response to receiving a message that does not have a canary or has an expired canary. The client application upon receiving an error message with a canary message will resend the prior message with the canary value present. The client application caches the canary value for subsequent messages until a new canary value is received. The canary value allows the server to ignore messages generated by the client application under control of an attacker.