4,124 research outputs found
BOOK REVIEW ON THE CITY AND THE URBAN COMPETITION, AUTHOR: IRINA POPESCU
No full textThe book “The city and the urban competition / Orasul si competitia urbana”, written by Irina Popescu, has recently been published at Economic Publishing House of Bucharest, Romania. The book is structured in 4 parts and it is very rich in concepts, ideas, theories, principles and comparative studies, representing an important contribution of the author to the development of the literature concerning the study of the city.urban competition, urban system
Beaty Popescu : This Green Bag
No full textHorne discusses Popescu's works from 1987 to 1992 involving natural objects embedded within layers of paper; the author treats themes such as the interior/exterior dichotomy and analogies with food and digestive organs. Artist's statement. Biographical notes. 28 bibl. ref
Depth map coding by dense disparity estimation for MVD compression
No full textIn multiview video representation, one of the most popular format is the so-called multiple view video plus depth. This representation is made up of N image sequences, each accompanied by a sequence of depth maps, telling the distance of each represented pixel from the observing camera. The depth maps are needed at the decoder side in order to generate intermediate views and therefore to enrich the user experience. This format is very flexible but also very demanding, in terms of storage space or and transmission bandwidth. Therefore, compression is needed. At this end, one of the key steps is an efficient representation of depth maps. In this work we build over a proposed method for multiple view video coding, based on dense disparity estimation between views. This allows us to obtain a compact and high-quality depthmap representation. In particular we explore the complex relationship between estimation and encoding parameters, showing that an optimal parameter set exist, that allows a fine-tuning of the estimation phase and an adaption of its results to the subsequent compression phase. Experiments are encouraging, showing remarkable gain over simple methods such as H.264/AVC simulcast, and even some gain with respect to more sophisticated techniques such as MVC. © 2011 IEEE
Region-of-interest-based rate control scheme for high-efficiency video coding
No full textThis paper presents a novel rate control scheme designed for the newest high efficiency video coding (HEVC) standard, and aimed at enhancing the quality of regions of interest (ROI) for a videoconferencing system. It is designed to consider the different regions at both frame level and coding tree unit (CTU) level. The proposed approach allocates a higher bit rate to the region of interest while keeping the global bit rate close to the assigned target value. The ROIs, typically faces in this application, are automatically detected and each CTU is classified in a region of interest map. This binary map is given as input to the rate control algorithm and the bit allocation is made accordingly. The algorithm is tested, first, using the initial version of the controller introduced in HEVC test model (HM.10), then, extended in HM.13. In this work, we first investigate the impact of differentiated bit allocation between the two regions using a fixed bit rate ratio in intra-coded frames (I-frames) and Bidirectionally predicted frames (B-frames). Then, unit quantization parameters (QPs) are computed independently for CTUs of different regions. The proposed approach has been compared to the reference controller implemented in HM and to a ROI-based rate control algorithm initially proposed for H.264 that we adopted to HEVC and implemented in HM.9. Experimental results show that our scheme has comparable performances with the ROI-based controller proposed for H.264. It achieves accurate target bit rates and provides an improvement in region of interest quality, both in objective metrics (up to 2 dB in PSNR) and based on subjective quality evaluation
To halt disease progression rehabilitation in MS should start early: Commentary
No full textThe author(s) received no financial support for the research, authorship and/or publication of this article
Introducing differential motion estimation into hybrid video coders
No full textDifferential motion estimation produces dense motion vector fields which are far too demanding in terms of coding rate in order to be used in video coding. However, a pel-recursive technique like that introduced by Cafforio and Rocca can be modified in order to work using only the information available at the decoder side. This allows to improve the motion vectors produced in the classical predictive modes of H.264. In this paper we describe the modification needed in order to introduce a differential motion estimation method into the H.264 codec. Experimental results will validate a coding mode, opening new perspectives in using differential-based motion estimation techniques into classical hybrid codecs. © 2010 SPIE
Euchromius bleszynskiellus Popescu-Gorj 1964
No full text<i>Euchromius bleszynskiellus</i> Popescu-Gorj, 1964 <p> <b>Material examined</b>: 1♂, <b>Odesa</b> reg., Bilhorod-Dnistrovskyi distr., Prymorske (Rosieika), 22. VI.2019 (S. Novytskyi), genitalia slide: V. Yepishin prep. no. 214.19 ♂. 1♀, <b>Odesa</b> reg., Bilhorod-Dnistrovskyi distr., 6 km SE of Prymorske vill., 45°40’30”N, 29°52’11”E, 2.VII.2019 (Ye. Khalaim), genitalia slide: V. Yepishin prep. no. 398.20 ♀ (all VYe). 2 ex., <b>Zaporizhzhia</b> reg., Melitopol distr., Stepanivska spit, 31.VII–2.VIII.1997 (O. Zhakov) (VM).</p> <p> <b>Distribution</b>: Romania, N Greece (Slamka 2008); Turkey (Slamka 2008; Koçak & Kemal 2018); Russia: Middle Volga, Volgo-Don and E Caucasus regions, S Urals (Sinev & Streltsov 2019); Ukraine: Kherson region (Govorun 2008a) and Crimea (Slamka 2008), <b>first records for Odesa and Zaporizhzhia regions</b>.</p>Published as part of <i>Yepishin, Viktor, Khalaim, Yevhenii, Budashkin, Yuriy, Zhakov, Oleksandr, Mushynskyi, Vadym & Novytskyi, Sergiy, 2021, New records of pyraloid moths (Lepidoptera: Pyraloidea) from different regions of Ukraine, pp. 366-388 in Zootaxa 5023 (3)</i> on pages 376-377, DOI: 10.11646/zootaxa.5023.3.3, <a href="http://zenodo.org/record/5226112">http://zenodo.org/record/5226112</a>
Design and implementation of a secure wide-area object middleware
No full textTanenbaum, A.S. [Promotor]Crispo, C.B. [Copromotor
THE STUDY OF THE MULTIPHOTONIC EXCITES FOR THE DIATOMIC MOLECULAR DISSOCIATION AND THE QUANTUM FLUCTUATIONS THEORY
No full textS. Popescu, %ICP Information Newsletter, January, p. 207-208, 1997. S. Popescu. ``A method of ozone generation''. Patents, Romania, Certificate no. 103488.Author Institution: Research Institute for Electrical EngineeringA method is presented for dissociation of diatomic molecules, found in a precisely defined atmosphere, through successive absorption of a quantum energy generated by laser effect, at a certain frequency and a certain density of energy, until the energy in this way accumulated became equal with the dissociation energy. The method, based on some of the results previously , has a better output than classical methods (in which the molecules are bombarded with particles having appropriate energy), allowing practically entire dissociation of all molecules which from that atmosphere. Applying my theoretical results, I have obtained and elaborated a new practical method of ozone , whose efficiency exceeds those of classical methods, using Corona discharge or UV radiation. The extract quantum fluctuation theory, proposed by H. Collen in 1935 and T. Welton in 1951, was used in the present work to determine the probability of the process of molecular dissociation using successive multiphotonic excitation
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