High-speed recursive-separable image processing filters with variable scanning aperture sizes

In the process of development of computer technologies, the number of areas of their application naturally grows and, along with it, the complexity of the tasks to be solved, which entails the need for new research. Similar tasks include digital filtering of images in the field of medical technologies and active-pulse television measuring systems. There are many methods and algorithms of digital filtering designed to solve the problem of improving the quality; algorithms that can improve the quality of images while reducing computational costs are widely used. High demands, which are made due to the constant growth in the size of the generated images, as well as the requirement for modern television systems, is real-time operation. When solving practical problems, it is required to use different filter aperture sizes, which provide an increase in quality and preservation of image details. The solution of these problems was the reason for the emergence of adaptive filters that are able to change the parameters in the process of processing the received data, while not spending additional time on processing with an increase in the size of the aperture. The paper presents the principles of constructing adaptive image processing filters, which, by obtaining an input parameter indicating the required dimension of a multi-element aperture, are able to implement the construction of the required aperture. The Laplacian “Truncated Pyramid” filter and the “double pyramid” Laplacian were modified. A feature of these filters is the oddness of the multi-element aperture, so the coefficient used to build the mask is always set to odd. When using these filters, it is possible to use two coefficients that are responsible for increasing the filtration efficiency, since, in their original form, the Laplacian filters have a sum of coefficients equal to zero. The experiment shows a comparison with high-dimensional filters that work when using classical two-dimensional convolution. The next stage of the presented research will be the application of parallel computing techniques, which will increase the speed of the developed filters.For help in preparing materials, we express our gratitude to Nikolaeva D.A. The research was carried out at the expense of the Russian Science Foundation grant No. 21-79-10200 at TUSUR

Transcription of Drosophila mobile element gypsy (mdg4) in heat-shocked cells

AbstractDrosophila melanogaster Schneider 2 line cultured cells were subjected to stable transformation by co-transfection with two plasmids, one of which conferred G418 resistance and another which contained the Drosophila retrotransposon, gypsy (mdg4), under the control of the heat-shock protein 70 promoter. Transcription of the introduced constructs, as well as of endogenous gypsy, was examined under the condition of heat shock. Active degradation of pre-existing gypsy transcripts was observed. During recovery, gypsy transcription was restored, but its termination and/or 3'-end processing became aberrant

The properties of gene Dm 225, a representative of dispersed repetitive genes in Drosophila melanogaster

The properties of Dm 225 DNA, a fragment of D.melanogaster genome 2.9 kb in length excised by EcoRI endonuclease and cloned in the λ gt phage or pMB9 plasmid, are described. The DNA hybridizes to a significant portion (0.8%) of total polysomal poly(A)(+)RNA (mRNA). The size of the hybridizing mRNA is about 2.3 kb (19S); it is present in the fraction of heavy polysomes. Dm 225 DNA fragments obtained with the aid of Hae III endonuclease have been mapped. mRNA hybridizes with all the fragments. In one of the end fragments, the 3′-end of mRNA has been localized and thus the direction of transcription determined. About 250 copies of the gene Dm 225 are present in the haploid genome of D.melanogaster, and all of them have the same size upon restriction with EcoRI endonuclease. On the other hand, the sequences of the genome adjacent to Dm 225 DNA are different and may vary from one cell line to another as evidenced by experiments in which the D.melanogaster DNA was restricted by Hind III endonuclease. In combination with in situ hybridization data /1,2/ the results obtained in this paper demonstrate that the structural gene present in Dm 225 DNA is a representative of a multiple gene family dispersed throughout the whole genome of D.melanogaster

Well-Forgotten Old

The article presents a case report of severe sepsis in weakened child with immunodeficiency. A week of intensive treatment was not able to stop the process. Attempts to force the body to fight infection itself by fresh frozen plasma transfusion, packed red blood cells and immunoglobulins did not bring principal success. To rescue the child we applied forgotten old method — direct blood transfusion from donor to patient

An architectural approach to process control of gas compressor stations with a low temperature separation gas preparation unit based on a digital twin

This article lists a part of a study of possibilities of using and integrating digital twins of the existing high-tech enterprise processes on the examples of a high-pressure gas compressor station and a gas treatment plant using low-temperature separation of an oil and gas enterprise using an architectural approach. The need for the use of digital twins (DT) in the high-tech industry is due to the inability to effectively conduct full-scale tests to select the necessary operating modes in the implementation framework of technological processes with varying parameters (high cost and increased resource consumption compared to the creation of a DT). The main difference between DT and conventional models is the three-dimensional matrix of input variable parameters that can be given to DT for processing in order to obtain the most correct output data when performing simulations. At the same time, millions of operational cycles can be generated in real time, which allows us to most effectively solve various business problems. For example, the task of finding optimal solutions and prototype configurations under study

A Child Died of What he Was Treated For, But…

This article describes atypical clinical case of Reye syndrome in 10-year-old girl, appeared on the background of acute enteric infection, and led to death. On the basis of clinical and laboratory data, was well as medical history of the child we performed short differential diagnosis of Reye syndrome, epilepsy and encephalitis, and conditions associated with dysfunction of the nervous system and the liver: fulminant hepatic failure, pancreatic encephalopathy, meningitis, congenital errors of metabolism