In this paper we present the treatment of two fundamental concepts in different disciplines of engineering and physical sciences: Dimension and space. First, we use an intuitive and pragmatic treatment of both identities. After, we introduce the formal treatment for scalar and vector quantities explaining that dimension and space as concepts are implicitly… (More)
This paper introduces some results concerning the high frequency noise analysis, along with the noise transport time (r) extraction and its impact over the microwave noise performances of SiGe heterojunction bipolar transistors (HBT). Our methodology of noise analysis can be extended to investigate the impact of the technological variations of the base over… (More)
We present the results of intrinsic transit time separation of SiGe:C heterojunction bipolar transistors (HBT). This is performed using a reliable technique based on hydrodynamic modeling. These results are compared to the extraction of the noise transport time. This last parameter is found to be equal to the sum of the base transit time… (More)
We show the importance that the Lanczos invariant has in the study of 4 R embedded into 5 E , in the analysis of non-null constant vectors, and in the existence of the Lanczos potential for the Weyl tensor.
Extracochlear electrical stimulation was carried out in 7 patients. We used square-wave signals. Electrode positions at the oval and round window showed the lowest current thresholds. The threshold of sound sensations elicited by electrical stimulation was higher in the high frequency than in the low frequency range. All 7 patients had hearing sensations… (More)