In this paper, the impact of the network architecture on signal quality in the fourth generation of the public mobile network is analyzed. The analysis was performed using RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio) and throughput parameters in indoor environment. The signal quality parameters were collected by measurement using TEMS Investigation and TEMS Pocket software. The measurements were carried out at the School of Electrical Engineering on the ground floor of the Technical Faculty building for the macro and micro cell scenario. It has been found that better signal quality is ensured in micro cells. Quality of the signal is also considered by the various services provided to the users.

: Three different approaches for improvement of objective video quality evaluation are presented in this paper. Improvement is obtained through quality guided temporal pooling, information content weighted temporal pooling, and multiscale analysis. The analysis was performed using five objective video quality assessment measures on two publicly available datasets with subjective quality scores. Only the videos with H.264, H.265, and MPEG-2 types of compression from two datasets were considered. The level of agreement between the subjective and objective quality scores are given through the Spearman rank-order correlation coefficients on complete datasets and subsets of video sequences with the same type of compression. Obtained results show that the performance of objective measures is dependent on the choice of the dataset. The greatest improvement is given by multiscale analysis.

Objective: To evaluate the casuistry of vascular malformations in our division and to analyze the predominant clinical findings of these malformations. Methods: A survey was carried out searching for all cases of pulmonary vascular malformations diagnosed, from August 1986 to December 2003. Through the analysis of the medical records of these patients, the following variables were evaluated: structural pulmonary alteration, clinical presentation, mean age at diagnosis, gender and clinical evolution. Results: The pathologies found were: pulmonary sequestration 6 cases (25%), agenesis and / or pulmonary hypoplasia 7 cases (30%), arteriovenous fistulas 4 cases (16%), vascular ring 6 cases (25%) and pulmonary valve agenesis 1 case (4%). Nine patients were male and 13 were female. Age at diagnosis ranged from 1 month to 58 years. The symptoms varied according to the pathology. The most frequent were recurrent respiratory infection, stridor, cyanosis, dyspnea. Of the 22 patients studied, 11 (50%) cases were amenable to surgical correction. Conclusion: Pulmonary vascular malformations are rare pathologies, but pediatricians should keep them in mind to obtain an early diagnosis, correct propaedeutics and, if possible, surgical correction of these pathologies.