scholarly journals Storing Digital Data Into DNA: A Comparative Study Of Quaternary Code Construction

2020 ◽  
Author(s):  
Melpomeni Dimopoulou ◽  
Marc Antonini ◽  
Pascal Barbry ◽  
Raja Appuswamy
Keyword(s):  
Comparative Study ◽  
Digital Data ◽  
Code Construction ◽  
Quaternary Code

Implementation of Improved Control Strategy of DC-AC Converter using Delta-Sigma Modulator

2016 ◽  
pp. 249-272
Author(s):  
Mohamayee Mohapatra ◽  
Chitti Babu Baladhandautham
Keyword(s):  
Comparative Study ◽  
Digital Signal Processor ◽  
Current Control ◽  
Digital Data ◽  
Variable Speed Drives ◽  
Analog To Digital ◽  
Pulse Width Modulated ◽  
Delta Sigma Modulator ◽  
Delta Sigma ◽  
Current Error

This Chapter presents a comparative study between two current control techniques, namely, conventional Delta Modulator and novel Delta-Sigma Modulator. The use of Delta modulator in variable speed drives poses a problem of noise while converting analog signal in to digital form; to optimize Pulse Width Modulated (PWM) inverter waveforms on-line without any optimization process. But in the Delta-Sigma Modulator the noise varies. It can be successfully applied to over-sampling digital-to-analog and analog-to-digital data converters, switch mode power supplies and inverters It is easy to implement, smooth inverter operation and provides low harmonics at the inverter output. The comparative study between the above said current controllers has been verified by the MATLAB computer simulation in terms of the high frequency power spectra, average switching frequency, rms current error and total harmonic distortion of load current waveforms. The obtained theoretical results are validated with experimental platform based on TMS320F2812 digital signal processor for effectiveness of the study.

Biodiversity and pedodiversity: a matter of coincidence? .

2014 ◽  
Vol 2 ◽  
Author(s):  
Juan José Ibáñez Martí ◽  
Asunción Saldaña ◽  
Dilier Olivera
Keyword(s):  
Comparative Study ◽  
Natural Resources ◽  
Spatial Patterns ◽  
Temporal Patterns ◽  
Digital Data ◽  
Ecological Studies ◽  
Spatial And Temporal Patterns ◽  
Theoretical Concepts

The concept of diversity has been widely used in ecological studies, although mainly for the biotic component (biodiversity). Regrettably, the effects of abiotic structures (e.g. soils) on the biotic components of ecosystems, landscapes and biomes are still a matter of discussion. We examined the similarity and differences in spatial and temporal patterns between biodiversity and pedodiversity. This comparative study was possible because of the increased availability of digital data on soils and other natural resources at various scales for pedodiversity analysis using the same theoretical concepts and tools applied by ecologists for biodiversity analyses. Remarkably, the spatial patterns of pedogeographic units detected by pedologists are similar to those reported by biologists for a plethora of ecosystems.

scholarly journals Feasibility of using death certificates for studying place of death in Latin America

2021 ◽  
Vol 45 ◽  
pp. 1
Author(s):  
Katja Seitz ◽  
Luc Deliens ◽  
Joachim Cohen ◽  
Cardozo Emanuel Adrian ◽  
Vilma A. Tripodoro ◽  
...  
Keyword(s):  
Latin America ◽  
Comparative Study ◽  
Associated Factors ◽  
Death Certificate ◽  
Digital Data ◽  
Place Of Death ◽  
Death Certificates ◽  
Death Certificate Data ◽  
Data Files

Objective. This paper assesses the availability and quality of death certificate data in Latin America and the feasibility of using these data to study place of death and associated factors. Methods. In this comparative study, we collected examples of current official death certificates and digital data files containing information about all deaths that occurred during 1 year in 19 Latin American countries. Data were collected from June 2019 to May 2020. The records for place of death and associated variables were studied. The criteria for data quality were completeness, number of ill-defined causes of death and timeliness. Results. All 19 countries provided copies of current official death certificates and 18 of these registered the place of death. Distinguishing among hospital or other health care institution, home and other was possible for all countries. Digital data files with death certificate data were available from 12 countries and 1 region. Three countries had data considered to be of high quality and seven had data considered to be of medium quality. Categories for place of death and most of the predetermined factors possibly associated with place of death were included in the data files. Conclusions. The quality of data sets was rated medium to high in 10 countries. Hence, death certificate data make it feasible to conduct an international comparative study on place of death and the associated factors in Latin America.

scholarly journals Watermarking Schemes for High Security with Applications and Attacks: Research Challenges and Open Issues

2019 ◽  
Vol 8 (4) ◽  
pp. 4163-4169
Keyword(s):  
Intellectual Property ◽  
Comparative Study ◽  
Digital Media ◽  
Digital Data ◽  
The Internet ◽  
The Public ◽  
Research Challenges ◽  
The Media ◽  
Day By Day ◽  
Open Issues

Recently, the growth of the internet is increased day by day also the digital data such as videos, images and audio availability to the public get increased rapidly. The society required intellectual property protection. To protect the media from other attack intruders and avoid business loss is the requirement of digital media produced. Introducing watermarks can be useful to safeguard copyright. In this review an effort is made to explore various aspects of watermarking, algorithms used, and to carry out a comparative study of these techniques based on their classifications.

Author response for "Laminar distribution of cortical projection neurons to the pulvinar: A comparative study in cats and mice"

2020 ◽  
Author(s):  
Bruno Oliveira Ferreira de Souza ◽  
Éve‐Marie Frigon ◽  
Robert Tremblay‐Laliberté ◽  
Christian Casanova ◽  
Denis Boire
Keyword(s):  
Comparative Study ◽  
Author Response ◽  
Projection Neurons ◽  
Cortical Projection ◽  
Laminar Distribution

Practical applications of scanning tunneling microscopy

1989 ◽  
Vol 47 ◽  
pp. 18-19
Author(s):  
D. R. Denley
Keyword(s):  
High Resolution ◽  
Scanning Tunneling Microscopy ◽  
Quantitative Information ◽  
Digital Data ◽  
Scanning Tunneling ◽  
Ambient Atmosphere ◽  
Tunneling Microscopy ◽  
Clear Trend ◽  
Practical Applications ◽  
Promising Tool

Scanning tunneling microscopy (STM) has recently been introduced as a promising tool for analyzing surface atomic structure. We have used STM for its extremely high resolution (especially the direction normal to surfaces) and its ability for imaging in ambient atmosphere. We have examined surfaces of metals, semiconductors, and molecules deposited on these materials to achieve atomic resolution in favorable cases.When the high resolution capability is coupled with digital data acquisition, it is simple to get quantitative information on surface texture. This is illustrated for the measurement of surface roughness of evaporated gold films as a function of deposition temperature and annealing time in Figure 1. These results show a clear trend for which the roughness, as well as the experimental deviance of the roughness is found to be minimal for evaporation at 300°C. It is also possible to contrast different measures of roughness.

Convergent-beam thickness determination: The advantages of digital imaging

1994 ◽  
Vol 52 ◽  
pp. 420-421
Author(s):  
Stuart McKernan ◽  
C. Barry Carter
Keyword(s):  
Intensity Variation ◽  
Convergent Beam Electron Diffraction ◽  
Digital Data ◽  
Thickness Determination ◽  
Frequent Use ◽  
Automated Processing ◽  
Beam Thickness ◽  
Convergent Beam ◽  
Remarkable Agreement

Convergent-beam electron diffraction (CBED) patterns contain an immense amount of information relating to the structure of the material from which they are obtained. The analysis of these patterns has progressed to the point that under appropriate, well specified conditions, the intensity variation within the CBED discs may be understood in a quantitative sense. Rossouw et al for example, have produced numerical simulations of zone-axis CBED patterns which show remarkable agreement with experimental patterns. Spence and co-workers have obtained the structure factor parameters for lowindex reflections using the intensity variation in 2-beam CBED patterns. Both of these examples involve the use of digital data. Perhaps the most frequent use for quantitative CBED analysis is the thickness determination described by Kelly et al. This analysis has been implemented in a variety of different ways; from real-time, in-situ analysis using the microscope controls, to measurements of photographic prints with a ruler, to automated processing of digitally acquired images. The potential advantages of this latter process will be presented.

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