Semiconductor optoelectronic devices such as diode lasers are formed on GaAs with an active region with a GaAsN electron quantum well layer and a GaAsSb hole quantum well layer which form a type II quantum well. A communications monitoring system which includes a packet input means for connecting to predetermined points on a network via a network interface and receiving communications packets flowing at the points; and matching means for performing real-time matching between two packet streams composed of received communications packets each time a communications packet is received. The challenge preferably includes a question that the sender must correctly answer in his response. , relative polarization, emitted from a reaction mixture that contains a dye labeled primer that hybridizes to a target sequence such that the primer ends at the position of interest. Also provided herein are methods for detecting and diagnosing prostate disorders, wherein the specific disorder is prostate cancer. The electron beam test system obtains potential contrast data for analysis by irradiating electron beam to a semiconductor integrated circuit device which is an analysis object.