Nowadays, transient analysis of electromagnetic systems is widely adopted as a virtual prototyping tool in the design electrical and electronic devices. Time domain (TD) methods for solutions Maxwell’s equations represent most obvious approach to tackling this type problem. Frequency (FD) techniques are also commonly used return TD response through inverse Fourier transform. This suffers from n...

We present a new free library for Constraint Logic Programming over Finite Domains, included with the Ciao Prolog system. The library is entirely written in Prolog, leveraging on Ciao’s module system and code transformation capabilities in order to achieve a highly modular design without compromising performance. We describe the interface, implementation, and design rationale of each modular co...

In this paper an alternative way of generating C-scan images using Fractal Dimension (FD) of any digitized waveforms as an ultrasonic feature is proposed. The work is carried out on the composite specimen having flaw in the form of inclusion and damage created by the drop weight impact. The technique to estimate FD of a 2D image is modified in this work and a procedure to compute FD of a digiti...

A new method for calculating the time-domain (TD) transfer function of ultra-wide band (UWB) antennas, which is used for measuring the electromagnetic pulse (EMP) at VHF, is proposed. The phase of the complex antenna factor is constructed based on the Hilbert transform that describes the relationship between the phase and amplitude of a signal in frequency domain (FD). The detailed steps for ca...

PURPOSE To compare raw acceleration output of the ActiGraph™ GT3X+ and GENEA activity monitors. METHODS A GT3X+ and GENEA were oscillated in an orbital shaker at frequencies ranging from 0.7 to 4.0 Hz (ten 2-min trials/frequency) on a fixed radius of 5.08 cm. Additionally, 10 participants (age = 23.8 ± 5.4 years) wore the GT3X+ and GENEA on the dominant wrist and performed treadmill walking (...

In this paper, space-time block coding (STBC) is applied to single-carrier distributed antenna network (SC-DAN). By using the frequency-domain STBC coded joint transmit/receive diversity (FDSTBC-JTRD) for the downlink while using the well-known frequencydomain space-time transmit diversity (FD-STTD) for the uplink, the diversity order is given by the product of the number of distributed antenna...

In our previous study, we proposed a post FFT frequency domain adaptive antenna array (FD-AAA) algorithm for the uplink detection in the broadband single-carrier multiple access system. In the post-FFT algorithm, the AAA weights on different frequencies are calculated respectively. In this study, we will compare the performance of the proposed algorithm with the pre-FFT type algorithm where the...

SNR (Signal to Noise Ratio) estimation is a very important parameter for channel estimation of the communication system. In this paper, some SNR estimation methods of digital modulation system are applied and improved in FM modulation system. Then we summarize several SNR estimation methods (EHM (Envelope High order Moment method), SE (Spectrum Estimation method), FD (Frequency Domain method), ...

We extend the technique of optimal time step (OTS) selection for finite difference (FD) schemes of time dependent PDEs to PDEs where the leading-order spatial derivative term has a spatially varying coefficient. The basic approach involves identifying a transformation of the domain that eliminates the spatial dependence of the coefficient for the leading-order term. This change of variables is ...

BACKGROUND Smoking consumption alters cardiac autonomic function. OBJECTIVE Assess the influence of the intensity of smoking and the nicotine dependence degree in cardiac autonomic modulation evaluated through index of heart rate variability (HRV). METHODS 83 smokers, of both genders, between 50 and 70 years of age and with normal lung function were divided according to the intensity of smo...