Highly nonlinear power transfer function-based format transparent, wide range, and independent dispersion monitoring method utilizing tunable dispersion compensator and digital signal processing

2014 ◽  
Author(s):  
Sheng He ◽  
Sheng Cui ◽  
Changjian Ke ◽  
Deming Liu
Keyword(s):  
Signal Processing ◽  
Transfer Function ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Power Transfer ◽  
Monitoring Method ◽  
Dispersion Compensator ◽  
Highly Nonlinear ◽  
Wide Range

Multidisciplinary in Cryptology

2014 ◽  
pp. 1-28
Author(s):  
Sattar B. Sadkhan Al Maliky ◽  
Nidaa A. Abbas
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Complexity Theory ◽  
Finite Groups ◽  
General Structure ◽  
Digital Signal ◽  
Computer Engineering ◽  
Control Engineering ◽  
Wide Range ◽  
Subject Areas

To reach the high depths of knowledge and expertise that are required nowadays, scientists focus their attention on minute areas of study. However, the most complex problems faced by scientists still need the application of different disciplines to tackle them, which creates a necessity for multi-disciplinary collaboration. Cryptology is naturally a multidisciplinary field, drawing techniques from a wide range of disciplines and connections to many different subject areas. In recent years, the connection between algebra and cryptography has tightened, and established computational problems and techniques have been supplemented by interesting new approaches and ideas. Cryptographic engineering is a complicated, multidisciplinary field. It encompasses mathematics (algebra, finite groups, rings, and fields), probability and statistics, computer engineering (hardware design, ASIC, embedded systems, FPGAs), and computer science (algorithms, complexity theory, software design), control engineering, digital signal processing, physics, chemistry, and others. This chapter provides an introduction to the disciplinary, multidisciplinary, and their general structure (interdisciplinary, trans-disciplinary, and cross-disciplinary). And it also gives an introduction to the applications of the multidisciplinary approaches to some of the cryptology fields. In addition, the chapter provides some facts about the importance of the suitability and of the multidisciplinary approaches in different scientific, academic, and technical applications.

scholarly journals A Novel Ultrasound Technique Based on Piezoelectric Diaphragms Applied to Material Removal Monitoring in the Grinding Process

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3932 ◽  
Author(s):  
Felipe A. Alexandre ◽  
Paulo R. Aguiar ◽  
Reinaldo Götz ◽  
Martin Antonio Aulestia Viera ◽  
Thiago Glissoi Lopes ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Material Removal ◽  
Low Cost ◽  
Digital Signal ◽  
Ultrasonic Waves ◽  
Grinding Process ◽  
Ultrasound Technique ◽  
Ultrasound Monitoring ◽  
Wide Range

The interest of the scientific community for ultrasound techniques has increased in recent years due to its wide range of applications. A continuous effort of researchers and industries has been made in order to improve and increase the applicability of non-destructive evaluations (NDE). In this context, the monitoring of manufacturing processes, such as the grinding process, arises. This work proposes a novel technique of ultrasound monitoring (chirp-through-transmission) through low-cost piezoelectric diaphragms and digital signal processing. The proposed technique was applied to the monitoring of material removal during the grinding process. The technique is based on changes in ultrasonic waves when propagated through the material under study, with the difference that this technique does not use traditional parameters of ultrasonic techniques but digital signal processing (RMS and Counts). Furthermore, the novelty of the proposed technique is also the use of low-cost piezoelectric diaphragms in the emission and reception of ultrasonic waves, enabling the implementation of a low-cost monitoring system. The results show that the monitoring technique proposed in this work, when used in conjunction with the frequency band selection, is sensitive to the material removal in the grinding process and therefore presents an advance for monitoring the grinding processes.

scholarly journals A comparison of parametric and integrative approaches for X-ray fluorescence analysis applied to a Stroke model

2018 ◽  
Vol 25 (6) ◽  
pp. 1780-1789 ◽  
Author(s):  
Andrew M. Crawford ◽  
Nicole J. Sylvain ◽  
Huishu Hou ◽  
Mark J. Hackett ◽  
M. Jake Pushie ◽  
...  
Keyword(s):  
Signal Processing ◽  
Image Analysis ◽  
Digital Signal Processing ◽  
Fluorescence Imaging ◽  
Emission Spectra ◽  
Fluorescence Analysis ◽  
Digital Signal ◽  
Contributing Factors ◽  
X Ray ◽  
Wide Range

Synchrotron X-ray fluorescence imaging enables visualization and quantification of microscopic distributions of elements. This versatile technique has matured to the point where it is used in a wide range of research fields. The method can be used to quantitate the levels of different elements in the image on a pixel-by-pixel basis. Two approaches to X-ray fluorescence image analysis are commonly used, namely, (i) integrative analysis, or window binning, which simply sums the numbers of all photons detected within a specific energy region of interest; and (ii) parametric analysis, or fitting, in which emission spectra are represented by the sum of parameters representing a series of peaks and other contributing factors. This paper presents a quantitative comparison between these two methods of image analysis using X-ray fluorescence imaging of mouse brain-tissue sections; it is shown that substantial errors can result when data from overlapping emission lines are binned rather than fitted. These differences are explored using two different digital signal processing data-acquisition systems with different count-rate and emission-line resolution characteristics. Irrespective of the digital signal processing electronics, there are substantial differences in quantitation between the two approaches. Binning analyses are thus shown to contain significant errors that not only distort the data but in some cases result in complete reversal of trends between different tissue regions.

scholarly journals Demonstration of Digital Retrodirective Method for Solar Power Satellite

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 498
Author(s):  
Mudassir Raza ◽  
Koji Tanaka
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Solar Power ◽  
Digital Signal ◽  
Space Environment ◽  
Beam Forming ◽  
Power Transfer ◽  
Pilot Signal ◽  
Frequency Selection ◽  
Selection For

This work presents digital retrodirective method to do microwave power transfer (MPT) for solar power satellite (SPS). Due to space environment, there is concern of antenna deformation, which will affect beam forming. Size of SPS is large and synchronization among antenna modules is difficult. Flexibility regarding frequency selection for MPT is also a requirement for SPS. Digital Retrodirective method determines phase of pilot signal and power signal is transmitted with conjugate phase. Digital Signal Processing (DSP) circuit is used for digital retrodirective method. Experiment is performed without antenna deformation and with antenna deformation cases. Digital retrodirective method performs beam forming without synchronization among antenna modules and corrects effect of antenna deformation successfully. Flexibility for frequency selection is also achieved by the DSP circuit. The presented results confirm that digital retrodirective method is a good candidate for power transfer from SPS.

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