75 research outputs found
Secure quantum turbo coded superdense coding scheme
No full textIn this paper we present a novel secure quantum turbo coded (QTC) superdense (SD) coding scheme. We have integrated SD with QTC to benefit from the inherent near optimum performance of turbo codes. We have further incorporated the quantum secure direct communication (QSDC) protocol within the proposed QTC-SD system for the sake of ensuring absolute security. Explicitly, the QSDC protocol exploits dummy entangled pairs for detecting the presence of eavesdropper. Hence, the proposed scheme ensures absolute security, detects the presence of an eavesdropper and considers practical issues when error is induced in a quantum depolarizing channel. Furthermore, we have experimentally determined the noise threshold levels for the proposed QTC-SD system to detect the presence of an eavesdropper.</p
Physical layer security: friendly Jamming in an untrusted relay scenario
No full textThis paper investigates the achievable secrecy regions when employing a friendly jammer in a cooperative scenario employing an untrusted relay. The untrusted relay which helps to forward the source signal towards the destination, could also be regarded as a potential eavesdropper. Our system employs a friendly jammer which sends a known noise signal towards the relay. In this paper, we investigate the effect of jammer and relay locations on the achievable secrecy rate. We consider two scenarios where in the first case we consider no direct transmission between the source and destination, while in the second case we include a source to destination direct link in our communication system
Improving secrecy rate via cooperative jamming based on Nash Equilibrium
No full textThis paper investigates the achievable secrecy regions when employing a friendly jammer in a cooperative scenario employing an untrusted relay. The untrusted relay which helps to forward the source signal towards the destination, could also be regarded as a potential eavesdropper. Our system employs a friendly jammer which sends a known noise signal towards the relay. In this paper, we investigate the effect of jammer and relay locations on the achievable secrecy rate. We consider two scenarios where in the first case we consider no direct transmission between the source and destination, while in the second case we include a source to destination direct link in our communication system
Distributed matching algorithms for spectrum access: a comparative study and further enhancements
No full textIn this paper, we consider a spectrum access scenario which consists of two groups of users, namely Primary Users (PUs) and Secondary Users (SUs) in Cooperative Cognitive Radio Networks (CCRNs). SUs cooperatively relay PUs messages based on Amplify-and-Forward (AF) and Decode-and-Forward (DF) cooperative techniques, in exchange for accessing some of the spectrum for their secondary communications. From the literatures, we found that the Conventional Distributed Algorithm (CDA) and Pragmatic Distributed Algorithm (PDA) aim to maximize the PU sum-rate resulting in a lower sum-rate for the SU. In this contribution, we have investigated a suit of distributed matching algorithms. More specifically, we investigated SU-based CDA (CDA-SU) and SU-based PDA (PDA-SU) that maximize the SU sum-rate. We have also proposed the All User-based PDA (PDA-ALL), for maximizing the sum-rates of both PU and SU groups. A comparative study of CDA, PDA, CDA-SU, PDA-SU and PDA-ALL is conducted, and the strength of each scheme is highlighted. Different schemes may be suitable for different applications. All schemes are investigated under the idealistic scenario involving perfect coding and perfect modulation, as well as under practical scenario involving actual coding and actual modulation. Explicitly, our practical scenario considers the adaptive coded modulation based DF schemes for transmission flexibility and efficiency. More specifically, we have considered the Self-Concatenated Convolutional Code (SECCC), which exhibits low complexity, since it invokes only a single encoder and a single decoder. Furthermore, puncturing has been employed for enhancing the bandwidth efficiency of SECCC. As another enhancement, physical layer security has been applied to our system by introducing a unique Advanced Encryption Standard (AES) based puncturing to our SECCC scheme.</p
Relay node selection and power allocation for distributed self-concatenated convolutional codes
No full textIn this contribution, the performance of a Distributed Self-Concatenated Convolutional Coding (DSECCC) scheme is analyzed by using Iterative Decoding (ID) for cooperative communications (CC) with the aid of relay selection (RS) and power allocation (PA). In the RS based DSECCC-ID scheme, where the transmit Signal to Noise power Ratio (SNR) is equal for both source and relay, we can achieve the minimum value of the required SNR at both destination and relay simultaneously by choosing a relay at an appropriate geographical location. By contrast, in the PA based DSECCC-ID scheme, where the position of the relay is in the middle, minimum required transmit SNRs are used both at the source and the relay. These schemes are analyzed with the help of binary Extrinsic Information Transfer (EXIT) charts. From our simulation results, we found that the RS based DSECCC-ID scheme outperforms the PA based DSECCC-ID scheme
Hemo-dynamics
No full textPraise for Hemo-Dynamics: “This book provides an elegant and intuitive derivation of the fundamental mathematics underlying fluid flow, and then applies these in a straightforward way to pulsatile blood flow in all its complexity. One of the triumphs of the book is that Zamir succeeds in making essential concepts such as the Navier-Stokes equations completely accessible to any reader with a knowledge of basic calculus. The author succeeds in conveying both the beauty of his subject matter, and his passion for the elegance and intricacies of fluid flow more generally.” Lindi Wahl, PhD, Professor of Applied Mathematics, The University of Western Ontario “Incredible, the figures alone are to die for… At first glance “Hemo-Dynamics” seems like a deep engineering and modeling dive into the mechanical properties of the cardiovascular system, blood, and how they interact to generate flow and pressure. However, the text is laid out in a stepwise manner and I was especially impressed in the way that the key conceptual figures illustrate the essential concepts. In keeping with the philosophical underpinnings of engineering, Professor Zamir has also constructed his book so that the format, text, equations and the figures are self-reinforcing. This is a book that will be of great use to those who seek to understand the cardiovascular system from a mechanical and modeling perspective.” Michael J. Joyner, MD, Professor of Anesthesiology, Mayo Clinic, Rochester, MN
Polyphony in "Anguille sous roche", "Mon Etincelle", "Dérangé que je suis" and "Jouissance" by Ali Zamir : enunciative and semiostylistic approach
No full textCette thèse se propose d'aborder la question de la polyphonie telle qu'elle se manifeste dans les romans de l'auteur comorien, Ali Zamir, que sont Anguille sous roche, Mon Étincelle, Dérangé que je suis et Jouissance. Suivant une approche à la fois énonciative et sémiostylistique, nous nous fixons pour objectif de faire ressortir tout ce qui contribue à faire de ces romans des textes polyphoniques : outils linguistiques, mécanismes langagiers, techniques discursives, etc. Ce travail de recherche part de l'hypothèse que la polyphonie est le trait par rapport auquel se définissent tous ceux que Zamir a mobilisés pour la construction de la littérarité de ses textes ; laquelle littérarité - comme cela est indiqué, dans la théorie sémiostylistique dont nous nous servirons, ne peut être déterminée que lors de la réception. C'est ainsi qu'une importance particulière sera accordée à l'analyse du lecteur pour montrer, entre autres objets, quels impacts peut avoir sur son activité de récepteur la combinaison des différentes « voix » convoquées par le scripteur, dont la sienne. Ce travail essaiera d'étudier le processus énonciatif mis en scène dans chaque roman, en analysant les différents rapports entre les actants qui y prennent part : narrateurs, lecteur (et autres destinataires), scripteur et éditeur, tous feront l'objet de l'analyse menée dans cette thèse.This thesis aims to address the question of polyphony as it manifests itself in the novels of the Comorian author, Ali Zamir, which are Anguille sous roche, Mon Étincelle, Dérangé que je suis and Jouissance. Following an approach that is both enunciative and semi-stylistic, we set ourselves the objective of bringing out everything that contributes to making these novels polyphonic texts: linguistic tools, language mechanisms, discursive techniques, etc. This research work starts from the hypothesis that polyphony is the trait in relation to which all those that Zamir mobilized for the construction of the literariness of his texts are defined; which literarity - as indicated, in the semiostylistic theory which we will use, can only be determined during reception. This is how particular importance will be given to the analysis of the reader to show, among other objects, what impacts the combination of the different “voices” summoned by the writer, including his own, can have on his activity as a receiver. This work will attempt to study the enunciative process staged in each novel, by analyzing the different relationships between the actors who take part in it: narrators, reader (and other recipients), writer and editor, all will be the subject of the analysis carried out in this thesis
La polyphonie dans "Anguille sous roche", "Mon étincelle", "Dérangé que je suis" et "Jouissance" d'Ali Zamir : approche énonciative et sémiostylistique
No full textThis thesis aims to address the question of polyphony as it manifests itself in the novels of the Comorian author, Ali Zamir, which are Anguille sous roche, Mon Étincelle, Dérangé que je suis and Jouissance. Following an approach that is both enunciative and semi-stylistic, we set ourselves the objective of bringing out everything that contributes to making these novels polyphonic texts: linguistic tools, language mechanisms, discursive techniques, etc. This research work starts from the hypothesis that polyphony is the trait in relation to which all those that Zamir mobilized for the construction of the literariness of his texts are defined; which literarity - as indicated, in the semiostylistic theory which we will use, can only be determined during reception. This is how particular importance will be given to the analysis of the reader to show, among other objects, what impacts the combination of the different “voices” summoned by the writer, including his own, can have on his activity as a receiver. This work will attempt to study the enunciative process staged in each novel, by analyzing the different relationships between the actors who take part in it: narrators, reader (and other recipients), writer and editor, all will be the subject of the analysis carried out in this thesis.Cette thèse se propose d'aborder la question de la polyphonie telle qu'elle se manifeste dans les romans de l'auteur comorien, Ali Zamir, que sont Anguille sous roche, Mon Étincelle, Dérangé que je suis et Jouissance. Suivant une approche à la fois énonciative et sémiostylistique, nous nous fixons pour objectif de faire ressortir tout ce qui contribue à faire de ces romans des textes polyphoniques : outils linguistiques, mécanismes langagiers, techniques discursives, etc. Ce travail de recherche part de l'hypothèse que la polyphonie est le trait par rapport auquel se définissent tous ceux que Zamir a mobilisés pour la construction de la littérarité de ses textes ; laquelle littérarité - comme cela est indiqué, dans la théorie sémiostylistique dont nous nous servirons, ne peut être déterminée que lors de la réception. C'est ainsi qu'une importance particulière sera accordée à l'analyse du lecteur pour montrer, entre autres objets, quels impacts peut avoir sur son activité de récepteur la combinaison des différentes « voix » convoquées par le scripteur, dont la sienne. Ce travail essaiera d'étudier le processus énonciatif mis en scène dans chaque roman, en analysant les différents rapports entre les actants qui y prennent part : narrateurs, lecteur (et autres destinataires), scripteur et éditeur, tous feront l'objet de l'analyse menée dans cette thèse
Les proverbes russes : statut et étude
No full textРусские пословицы: статус и изучение
В статье определяется сущность и статус пословицы как самобытного феномена словесной культуры: ее принципиальные, важнейшие семантические, темпоральные, структурные и др. параметры в сравнении с единицами обычной речи и авторскими афоризмами.
Рассматривается характер и диапазон изменения ее формы и содержания.
Очерчиваются границы, разделяющие пословицы и квазипословичные формулы (поговорки, авторские афоризмы), как и то, что их объединяет.
Обозначены основные этапы собирания русских пословиц и этапы становления русской паремиологии в качестве отдельной отрасли филологического знания.Russian Proverbs : Status and Study
The article defines the essence and status of proberb as an authentic verbal culture phenomenon as well as its principal and most important semantic, temporal, structural and other parameters compared to patterns of common speech and author's aphorisms.
An approach of this kind is made due to présent the character and scale of pro verb form-contents mutation.
Some specific features distinguishing proverbs from quasi proverb forms (e.g. sayings, author's aphorisms) on the one hand, uniting these facts of speech on the other are also noted by the author.
At the same time the subject of the article includes the main stages of both Russian proverb collection and formation of Russian paremiology as a separate field of philological knowledge.Tarlanov Zamir Kurbanovich. Les proverbes russes : statut et étude. In: Revue des études slaves, tome 76, fascicule 2-3, 2005. Les proverbes en Russie. Trois siècles de parémiographie, sous la direction de Stéphane Viellard. pp. 249-262
Mediapipe based Preprocessed VGGFace2 Dataset
No full textVGGFace2 Dataset and Face Mesh PreprocessingIntroductionThe VGGFace2 dataset is a large-scale face recognition dataset containing over 3.31 million images of 9,131 identities, with an average of 362 images per identity. The dataset is designed to include extensive variations in pose, age, illumination, ethnicity, and profession, making it one of the most diverse and challenging face recognition datasets available. For more details, please refer to the original publication:VGGFace2: A dataset for recognizing faces across pose and age - DOI: 10.48550/arXiv.1710.08092
Preprocessing Using MediaPipe 3D Face MeshOn this dataset, we applied the MediaPipe-based 3D face mesh algorithm to accurately detect faces while removing all background elements, including hair. Our preprocessing strictly retained facial landmarks, ensuring that only the essential facial features were preserved. This approach significantly enhanced the accuracy and generalization of our model, as the model was trained exclusively on landmark-based facial data.
Training and PerformanceThe preprocessed data was utilized to train Xception model, which resulted in remarkably accurate outcomes due to the strictly landmark-based facial representation. The model demonstrated robust performance including explainable-AI, proving that eliminating unnecessary background elements contributed positively to its efficiency and reliability.
CitationIf you use this dataset or the preprocessed version in your work, please cite both of the following:
VGGFace2 Dataset:
@article{Cao2018VGGFace2, title={VGGFace2: A dataset for recognizing faces across pose and age}, author={Cao, Qiong and Shen, Li and Xie, Weidi and Parkhi, Omkar M and Zisserman, Andrew}, journal={arXiv preprint arXiv:1710.08092}, year={2018}}
DOI: [10.48550/arXiv.1710.08092](https://doi.org/10.48550/arXiv.1710.08092) Preprocessed Dataset using MediaPipe:@dataset{Shah2025_MediaPipe_FaceMesh, title={MediaPipe-based 3D Face Mesh Preprocessed VGGFace2 Dataset}, author={Shah, Syed Taimoor Hussain and Shah, Syed Adil Hussain and Zamir, Ammara and Qayyum, Kainat and Shah, Syed Baqir Hussain and Fatima, Syeda Maryam and Deriu, Marco Agostino}, year={2025}, doi={10.5281/zenodo.15078557}} DOI: [10.5281/zenodo.15078557](https://doi.org/10.5281/zenodo.15078557)
ContactFor any questions or further details, please feel free to contact us.Syed Taimoor Hussain ShahPolitoBIOMed Lab, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, ItalyEmail: [email protected]: 0000-0002-6010-677
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