In this study, we have theoretically investigated the effect of electron stopper layer on internal temperature distribution of high performance vertical cavity surface-emitting laser emitting at 1305 nm. Simulation software PICS3D, which self-consistently combines the 3D simulation of carrier transport, self-heating, gain computation and wave-guiding, was used. Simulation results show that chan...

High-performance networking requires attention to operating system support at the device driver level. Existing driver models, such as those of Unix, are not necessarily well-suited to supporting high-speed network interfaces. In fact, current drivers may represent a significant obstacle between applications and the high-speed network adapters they seek to exploit. Yet existing models cannot si...

The performance of a Hamming Distance Classiier based on static memory cells and an analog winner-takes-all circuit depends on device matching in the various parts of the circuit. This dependence has been analyzed, leading to design criteria for choosing the device sizes and chip structure. The theoretical performance of a CMOS chip designed to operate in the subthreshold region has been compar...

Haptic interfaces are becoming more widely used in virtual reality simulations because of their enhancement to performance in training and simulation. Unintended vibration degrades the effectiveness of a haptic device and can reduce the user's ability to detect small details in the surface of simulated hard objects. Two important design factors for controlling haptic device vibrations are servo...

The insucess of proceeded baselines of considerable length, when the ionospheric and tropospheric delays are not properly modeled, is a serious problem. In order to minimize such problem, some models have been proposed to minimize the biases. For example, the combination of L1 and L2 carrier-phase can vanish 98% of the first-order ionospheric biases. Generally, the LGO device, the equipment und...

Over the next few years Wi-Fi networks will transition to 802.11n technology. During this time many networks will support a mix of 802.11a/g and 802.11n clients. Because they operate at lower data rates, the older clients can reduce the capacity of the entire network. ClientLink technology can help solve problems related to adoption of 802.11n in mixed-client networks by making sure that 802.11...

With more and more mission‐critical networking‐intensive workloads being virtualized and consolidated, virtual network performance has never been more important and relevant than today. VMware has been continuously improving the performance of its virtual network devices. VMXNET Generation 3 (VMXNET3) is the most recent virtual network device from VMware, and was designed from scratch for high ...

One of the advantages of SOI transistors compared to bulk devices is that at GHz frequencies, the substrate does not impact significantly on the behavior of transistors. Thanks to the thickness of the buried oxide, the body effect can be safely neglected at high frequency [4.1]. Thus, it is not necessary to develop a four terminal model for the SOI transistor used for RF applications. In this c...

Medical devices have made a significant contribution to helping patients enjoy longer lives of higher quality. However, numerous weaknesses in their premarket evaluation and post-market surveillance have sometimes left patients worse off from faulty devices. For example, the Sprint Fidelis implantable cardioverterdefibrillator lead (Medtronic, Minneapolis, Minnesota) was approved by the United ...