A small group of three patients presented in our study represents extraordinary and very complicated problem of congenital hiatus hernia in infant period from 6th to 9th month of life, associated ...with gastroesophageal reflux and consecutive esophageal stenosis. There are two very rare and delicate entities within differential diagnosis, in the domain of the same pathology: congenitally short esophagus and congenital esophageal stenosis; with completely different surgical options for their treatment. That is why an optimal diagnostics and an adequate operative technique are extremely important for the treatment of hiatus hernia. The uppergastrointestinal barium radiography is definitely the method of diagnosing hiatus hernia, which provides typical, almost pathognomonic image of hiatus hernia accompanied by the esophageal stenosis. Nissen fundoplication is the technique of choice for its surgical treatment, with gastrostomy for probable postoperative esophageal dilatation. The results are more than satisfying: early peroral feeding, with spontaneous resolving of esophageal stenosis, which significantly diminishes the need for esophageal bougienage.
This paper deals with the analysis of electrical circuits with classical one-port elements including two novel defined one-port fractional order elements: fractional-order resistive-capacitive RC-α ...and fractional-order inductive RL-α element. The definitions and analytical relations between current, voltage and power of introduced fractional elements are provided. An example of fractional element realization via ladder electrical circuit composed of classical resistors, capacitors and/or inductors is presented. Several examples are analyzed to illustrate the behavior of electrical circuit with fractional order elements for different values of fractional order α including differentiator/integrator circuits as well as complex circuits without accumulated energy.
The paper presents the application of cement stabilization in the world and in our country. In addition to the literature review, basic physical - mechanical tests of the pavement base without the ...use of hydraulic binder and with the use of hydraulic binder with different percentages of participation (3, 5, and 7%) were given. The hydraulic binder of the manufacturer LaFarge HRB 12.5 was used as a binder, and the material on which this binder was tested is a clay material taken from Subotica. Using this binder, it was concluded that any percentage of binder leads to significant improvement of the placenta and thus improves the load-bearing capacity of the pavement structure.
Introduction: Aging is a continuous process, which leaves its mark on all tissues, organs and organ systems. The aging process causes a number of functional and morphological and structural changes ...in the kidneys. Objective: The aim of our study was to analyze echotomographic changes in the size of the renal parenchyma and renal sinus during the aging process. Method: The study was conducted on 62 subjects in the service of the radiological diagnostics of CHC Dr Dragisa Mišović in Belgrade. All subjects included in this study were neither anamnestically nor echotomographically positive for any of kidney diseases. Subjects were assorted in three age groups. Group I (20-39 years) - 21 subjects, group II (40-59 years) - 21 subjects, and group III (60-79 years) - 20 subjects. Results: During aging process dimensions of the renal parenchyma decrease. Dimensions of the renal parenchyma exhibit statistically significant difference (p<0.05) between the first and third age group for both kidneys, but difference between the first and second age group is significant only for the right kidney (p<0,05). Dimensions (length and width), of the renal sinuses tend to increase during the aging process, with difference between the first and third age group that is statistically significant for both kidneys (p<0.05). Difference in width of the sinuses for both kidneys is statistically significant only between the second and third age group. Conclusion: During aging process size of the renal sinus increases at the expense of renal parenchyma, and parenchyma-pyelon index decreases.
The existence and uniqueness conditions are a prerequisite to ensure the reliable reconstruction of sparse signals from reduced sets of measurements within the compressive sensing (CS) paradigm. ...However, despite their underpinning role in practical applications, the existing uniqueness relations are either computationally prohibitive to implement the restricted isometry property (RIP) or involve mathematical tools that are beyond the standard background of engineering graduates (the coherence index). This may introduce conceptual and computational obstacles in the development of engineering intuition, design of suboptimal practical solutions, and understanding of theoretical and practical limitations of the CS framework.
Graphs are irregular structures that naturally represent the multifaceted data attributes; however, traditional approaches have been established outside signal processing and largely focus on ...analyzing the underlying graphs rather than signals on graphs. Given the rapidly increasing availability of multisensor and multinode measurements, likely recorded on irregular or ad hoc grids, it would be extremely advantageous to analyze such structured data as "signals on graphs" and thus benefit from the ability of graphs to incorporate spatial sensing awareness, physical intuition, and sensor importance, together with the inherent "local versus global" sensor association. The aim of this lecture note is, therefore, to establish a common language between graph signals that are observed in irregular signal domains and some of the most fundamental paradigms in digital signal processing (DSP), such as spectral analysis, system transfer function, digital filter design, parameter estimation, and optimal denoising.
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