Engine downsizing allows automotive manufactures to achieve improved efficiency and reduce emissions. Turbocharging can increase the power density of the engine, and therefore plays a vital role in downsizing. Due to the nature of the reciprocating engine, a turbocharger turbine operates in a highly unsteady environment. This paper presents a computational investigation looking at the impact of...

This paper presents a low-frequency amplitude modulator and demodulator based on Field Programmable Analogue Array (FPAA) devices. For creating the FPAA circuits, amplitude modulation and synchronous demodulation methods known from designing analogue RF transmission systems have been adapted. The proposed system allows redesigning the analogue conditioning stage thanks to the use of a FPAA devi...

2 Introduction 2 1.1 Is the security of quantum encryption indeed robust? 3 1.2 The KLJN secure key exchange system 4 1.1.1 The idealized KLJN scheme and its security 4 1.1.2 The security of the KLJN scheme is based on the Second Law of Thermodynamics 6 1.1.3 On active (invasive) attacks and attacks utilizing non-idealities 8 1.1.4 Foundations of the information theoretic security in practical ...

In this chapter, the performance improvement obtained from phase modulation (PM) and filtering on return-to-zero (RZ) signal format at the transmitter is investigated. The primary purpose is to understand the mechanism of each type of PM that leads to performance improvement relative to the RZ signal format with no PM. Three types of phase modulation on an RZ pulse train are considered in this ...

A striation pattern can emerge in high-frequency acoustic signals interacting with dynamic surface waves. The striation pattern is analyzed using a ray tracing algorithm for both a sinusoidal and a rough surface. With a source or receiver close to the surface, it is found that part of the surface on either side of the specular reflection point can be illuminated by rays, resulting in time-varyi...

Pulse-width modulated (PWM) adjustable frequency drives (AFDs) are extensively used in industries for control of induction motors. It has led to significant advantages in terms of the performance, size, and efficiency but the output voltage waveform no longer remains sinusoidal. Hence, overshoots, high rate of rise, harmonics and transients are observed in the voltage wave. They increase voltag...

The influence of nanofluid with different wave forms in the presence of inclined asymmetric channel on peristaltic transport of a pseudoplastic fluid is examined. The governing equations for two dimensional and two directional flows of a pseudoplastic fluid along with nanofluid are modeled and then simplified under the assumptions of long wavelength and low Reynolds number approximation. The ex...

The anisotropy of temperature is studied here in a strong two-dimensional shock wave, simulated with conventional molecular dynamics. Several forms of the kinetic temperature are considered, corresponding to different choices for the local instantaneous stream velocity. A local particle-based definition omitting any "self"-contribution to the stream velocity gives the best results. The configur...

This paper introduces a new class of oscillators that generate sinusoidal signals by formation of a circular standing wave on a ring (closed-loop) transmission line (t-line). A basic form of the circular standing wave oscillator (CSWO), schematically illustrated at the top left of Fig. 21.2.1, consists of a ring t-line and two pairs of cross-coupled inverters located at two opposite ports on th...