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Robust multiplicative patchwork method for audio watermarking
, Article IEEE Transactions on Audio, Speech and Language Processing ; Volume 17, Issue 6 , 2009 , Pages 1133-1141 ; 15587916 (ISSN) ; Akhaee, M. A ; Ahadi, M ; Amindavar, H ; Sharif University of Technology
2009
Abstract
This paper presents a Multiplicative Patchwork Method (MPM) for audio watermarking. The watermark signal is embedded by selecting two subsets of the host signal features and modifying one subset multiplicatively regarding the watermark data, whereas another subset is left unchanged. The method is implemented in wavelet domain and approximation coefficients are used to embed data. In order to have an error-free detection, the watermark data is inserted only in the frames where the ratio of the energy of subsets is between two predefined values. Also in order to control the inaudibility of watermark insertion, we use an iterative algorithm to reach a desired quality for the watermarked audio...
Robust multiplicative patchwork method for audio watermarking
, Article DSP 2009:16th International Conference on Digital Signal Processing, Santorini, 5 July 2009 through 7 July 2009 ; 2009 ; 9781424432981 (ISBN) ; Akhaee, M. A ; Ahadi, M ; Amindavar, H. R ; Sharif University of Technology
2009
Abstract
A Multiplicative Patchwork Method (MPM) for audio watermarking is proposed in this paper. In order to embed watermark data within the host signal, two subsets of the host signal features are selected using two secret keys. Then, watermark data is inserted simply by multiplying one subset and leaving the other one unchanged. In order to have an error free detection in attack-free case, embedding is performed in the selected frames of the host signal which satisfies a certain condition. This method is implemented in the wavelet domain and approximation coefficients are used for data embedding. Furthermore, the inaudibility of watermark insertion is controlled using iterative approach aided by...
Investigating the Relation of Individualistic/Collectivistic Culture on Constructive thougt Patterns Strategies
, M.Sc. Thesis Sharif University of Technology ; Khademi, Mahshid (Supervisor)
Abstract
Self-leadership” is a process through which individuals control their performance and lead themselves by using specific behavioral and cognitive strategies (Manz, 1986; Manz and Neck, 2004). This concept includes a toolkit of behavioral activities borrowed from social cognitive theory and goal setting. It also includes constructive thought processes that have been extensively studied in sports psychology. Scholars have categorized the SL (self-leadership) strategies into three main categories; behavioral, natural reward and constructive thought Strategies. (Neck and Houghton, 2006) Given the growing importance of self-leadership in contemporary organizations operating in an increasingly...
A novel technique for audio signals watermarking in the wavelet and Walsh transform domains
, Article 2006 International Symposium on Intelligent Signal Processing and Communications, ISPACS'06, Yonago, 12 December 2006 through 15 December 2006 ; 2006 , Pages 171-174 ; 0780397339 (ISBN); 9780780397330 (ISBN) ; Ghaemmaghami, S ; Khademi, N ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2006
Abstract
This paper presents a novel approach to audio signals watermarking in the wavelet or the Walsh transform domain. The idea is to embed watermark data in the coefficients of some scales of the transform domain. The overall bit rate of this method is about 90 bps. Due to low computational complexity of the suggested approach, particularly in the Walsh domain, this algorithm can be implemented in real time. Experimental results show robustness of the proposed method in low SNRs and also against some typical attacks, such as MP3 compression, echo, filtering, etc. Subjective evaluation confirms transparency of the watermarked audio signals. © 2006 IEEE
Robust audio and speech watermarking using Gaussian and Laplacian modeling
, Article Signal Processing ; Volume 90, Issue 8 , 2010 , Pages 2487-2497 ; 01651684 (ISSN) ; Khademi Kalantari, N ; Marvasti, F ; Sharif University of Technology
2010
Abstract
In this paper, a semi-blind multiplicative watermarking approach for audio and speech signals has been presented. At the receiver end, the optimal maximum likelihood (ML) detector aided by the archived information for Gaussian and Laplacian signals in noisy environment is designed and implemented. The performance of the proposed scheme is analytically calculated and verified by simulation. Then, we adapt the proposed scheme to speech and audio signals. To improve robustness, the algorithm is applied to low frequency components of the host signal. Besides, the power of the watermark is controlled elegantly to have inaudibility using perceptual evaluation of audio quality (PEAQ) and perceptual...
Design and optimization of feedback control system for active shielding of HTS RF-SQUID based MCG
, Article 24th Iranian Conference on Electrical Engineering, ICEE 2016, 10 May 2016 through 12 May 2016 ; 2016 , Pages 457-459 ; 9781467387897 (ISBN) ; Majzoubi, M ; Kalantari, N ; Fardmanesh, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2016
Abstract
A High Tc RF-SQUID Based magnetocardiography system is developed for operating in a passively unshielded environment, in which active shielding is implemented to compensate field noises for the low to midrange frequency range. The main part of the implemented active shield configuration is a feedback control system designed for environmental noise cancelation in particular that of the power lines. This control system includes two layers of inner and outer compensation coils with respect to the liquid Nitrogen Dewar as parts of the designed active shield. The inner coils are surrounding the HTS SQUIDs which are placed in axial gradiometric configuration inside the dewar. The outer coils are...
Robust multiplicative audio and speech watermarking using statistical modeling
, Article 2009 IEEE International Conference on Communications, ICC 2009, Dresden, 14 June 2009 through 18 June 2009 ; 2009 ; 05361486 (ISSN); 9781424434350 (ISBN) ; Khademi Kalantari, N ; Marvasti, F ; Sharif University of Technology
2009
Abstract
In this paper, a semi-blind multiplicative watermarking approach for audio and speech signals has been presented. At the receiver end, the optimal Maximum Likelihood (ML) detector aided by the channel side information for Gaussian and Laplacian signals in noisy environment is designed and implemented. The performance of the proposed scheme is analytically calculated and verified by simulation. Then, we adapt the proposed scheme to speech and audio signals. To improve robustness, the algorithm is applied to low frequency components of the host signal. Besides, the power of the watermark is controlled elegantly to have inaudibility using Perceptual Evaluation of Audio Quality (PEAQ) and...
Development of a colorimetric sensor array based on monometallic and bimetallic nanoparticles for discrimination of triazole fungicides
, Article Analytical and Bioanalytical Chemistry ; April , 2021 ; 16182642 (ISSN) ; Fahimi Kashani, N ; Hormozi Nezhad, M. R ; Sharif University of Technology
Springer Science and Business Media Deutschland GmbH
2021
Abstract
Due to the widespread use of pesticides and their harmful effects on humans and wildlife, monitoring their residual amounts in crops is critically essential but still challenging regarding the development of high-throughput approaches. Herein, a colorimetric sensor array has been proposed for discrimination and identification of triazole fungicides using monometallic and bimetallic silver and gold nanoparticles. Aggregation-induced behavior of AgNPs, AuNPs, and Au-AgNPs in the presence of four triazole fungicides produced a fingerprint response pattern for each analyte. Innovative changes to the metal composition of nanoparticles leads to the production of entirely distinct response patterns...
Development of a colorimetric sensor array based on monometallic and bimetallic nanoparticles for discrimination of triazole fungicides
, Article Analytical and Bioanalytical Chemistry ; Volume 414, Issue 18 , 2022 , Pages 5297-5308 ; 16182642 (ISSN) ; Fahimi Kashani, N ; Hormozi Nezhada, M. R ; Sharif University of Technology
Springer Science and Business Media Deutschland GmbH
2022
Abstract
Due to the widespread use of pesticides and their harmful effects on humans and wildlife, monitoring their residual amounts in crops is critically essential but still challenging regarding the development of high-throughput approaches. Herein, a colorimetric sensor array has been proposed for discrimination and identification of triazole fungicides using monometallic and bimetallic silver and gold nanoparticles. Aggregation-induced behavior of AgNPs, AuNPs, and Au-AgNPs in the presence of four triazole fungicides produced a fingerprint response pattern for each analyte. Innovative changes to the metal composition of nanoparticles leads to the production of entirely distinct response patterns...
A fully integrated 0.18-μm CMOS transceiver chip for X-band phased-array systems
, Article IEEE Transactions on Microwave Theory and Techniques ; Volume 60, Issue 7 , 2012 , Pages 2192-2202 ; 00189480 (ISSN) ; Mousavi, N ; Kalantari, M ; Moezzi, M ; Medi, A ; Sharif University of Technology
2012
Abstract
An X-band core chip is designed and fabricated in 0.18-μm CMOS technology, which can significantly reduce the monolithic microwave integrated circuit count required for realizing an active beam-former T/R module. The core chip consists of two RX/TX paths, each of which includes a 6-b phase shifter, a 6-b attenuator, along with two input and output amplifiers. A new architecture for realizing such a core chip system and a low loss circuit for 5.625° phase shift block are proposed. The overall rms phase and gain errors are better than 2° and 0.25 dB, respectively, in both RX/TX paths. The gain of each path is around 12 dB, while the output 1-dB compression point is higher than 10 dBm over the...
A noninvasive urine metabolome panel as potential biomarkers for diagnosis of t cell-mediated renal transplant rejection
, Article OMICS A Journal of Integrative Biology ; Volume 24, Issue 3 , March , 2020 , Pages 140-147 ; Chashmniam, S ; Nafar, M ; Samavat, S ; Rezaie, D ; Dalili, N ; Sharif University of Technology
Mary Ann Liebert Inc
2020
Abstract
Acute T cell-mediated rejection (TCMR)is a major complication after renal transplantation. TCMR diagnosis is very challenging and currently depends on invasive renal biopsy and nonspecific markers such as serum creatinine. A noninvasive metabolomics panel could allow early diagnosis and improved accuracy and specificity. We report, in this study, on urine metabolome changes in renal transplant recipients diagnosed with TCMR, with a view to future metabolomics-based diagnostics in transplant medicine. We performed urine metabolomic analyses in three study groups: (1) 7 kidney transplant recipients with acute TCMR, (2) 15 kidney transplant recipients without rejection but with impaired kidney...
HPASC–OPCC bi-surface shear strength prediction model using deep learning
, Article Road Materials and Pavement Design ; Volume 24, Issue 7 , 2023 , Pages 1765-1792 ; 14680629 (ISSN) ; Toufigh, V ; Sharif University of Technology
Taylor and Francis Ltd
2023
Abstract
This research focused on high-performance alkali-activated slag concrete (HPASC) as an overlay material on ordinary Portland cement concrete (OPCC). HPASC specimens were designed with different NaOH molarity, silica fume (SF) content, steel fiber content, age of repair material, and proportion of grooved surface area to the gross area. The results indicated that the steel fibers in HPASC improved the compressive strength and increased the BSS strength. The convolutional neural network (CNN) and multilayered perceptron (MLP) were used to determine a comprehensive model for simulating the effect of each parameter on the BSS shear strength. The simulation results suggest that the CNN, as...
Synthesis, Characterization and Field Emission Study of Molybdenum Oxide (MoOx)Nanostructures
, M.Sc. Thesis Sharif University of Technology ; Moshfegh, Alireza (Supervisor)
Abstract
Different molybdenum oxide nano/micro structure thin films were synthesized by thermal evaporation method under various growth conditions such as deposition time, temperature and evaporation source-substrate distance. Molybdenum oxide nanostructures grown on Si(100) such as nanowalls, nanostars and nanowires were characterized with scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), atomic force microscopy (AFM) and high resolution transmission electron microscopy (HRTEM). Shape and type of nanostructures were determined with SEM, AFM and HRTEM analysis. XPS analysis showed that the synthesized nanostructures contained Mo6+, Mo5+, Mo4+ and...
Network Design Problem to Prevent Chaotic Flow
, M.Sc. Thesis Sharif University of Technology ; Pourzahedi, Hossein (Supervisor)
Abstract
Two significant features of a transportation network, uncertainty and complexity, might cause some irregular behaviors. One example of such behaviors is chaotic flow in which the transportation system fails to reach equilibrium and people experience different daily travel times. These uncertainties are not controllable in any transportation system and, if not taken into consideration, will result to low levels of service and poor reliability. In this study, an evolutionary traffic assignmet model is used to illustrate when the network reaches bifurcation and chaos. Later, the effects of uncertainty in the parameters of supply and demand is tested on the evolutionary traffic assignment model....
Recommender Systems Based on Community Structure among Users and Items
, M.Sc. Thesis Sharif University of Technology ; Jalili, Mahdi (Supervisor)
Abstract
Mankind with it’s finite resources (Time, Energy, …) cannot make use of every accessible option in daily activities (such as buying items, listening to music and reading news), and is restricted to decide on a handful of them. Available options are increasing on a daily basis and these surplus of available options had an adverse effect; Thus, leading us to more baffling situations. As a result, need for external assistance appeared in decision situations. Considering exceptional computation power available to computers, a framework named Recommender Systems were developed. Recommender systems try to use their accessible data in order to make fitting suggestions to users. Personalization and...
A Study of Trade and Transportation Trends in Asia
, M.Sc. Thesis Sharif University of Technology ; Vaziri, Manouchehr (Supervisor)
Abstract
Considering the extensive developments achieved up to now in the fields of trade and international transportation, as well as the key role of the freight transportation in the economical development of a zone or a country, the present research, titled “A Study of the Trade and Transportation Trends”, was planned. The available data concerning the trade of six types of the goods according to The United Nations Classification (SITC), within the period 1965-2005, have been analyzed in this research. The study has been focused on the Asian Multimodal Network constituted of 31 countries. Trading centre of each country in the selected network is assumed to be located in its capital town. The...
Time Accurate 3D Analysis of Liquid Jet Breakup Dynamics Using the Image Analysis Techniques
, M.Sc. Thesis Sharif University of Technology ; Farshchi, Mohammad (Supervisor)
Abstract
The liquid breakup analysis and spray characteristics measurement of atomizer are very essential for the numerical modeling of the primary atomization in combustion chambers. The atomization process is irregular and random nature and is a chaotic phenomenon. This study was motivated by the lack of temporal analysis of the breakup process especially for the first and second wind-induced breakup regimes and the atomization regime. The aim of this study was to determine the location, velocity and structures of breakup liquid jet at different outlet pressures from 0.3 bar to 50 bar. The results indicate that the breakup length, ligament size, and the breakup time period are randomly varied in...
Investigating the Effects of the Length of Yielding Area In Buckling-Restrained Braces
, M.Sc. Thesis Sharif University of Technology ; Mofid, Masood (Supervisor)
Abstract
Structures having buckling restrained braces (BRB) as earthquake resisting system, have the qualities of high lateral stiffness and the ability to damp the energy coming from earthquake, at the same time.In addition to new structures, these braces can also be used in rehabilitating old steel or concrete buildings. By using this kind of resisting system, smaller sections are needed in design of buildings and also the cost of repair after earthquake can be highly reduced.The most important advantage of buckling restrained braces is their equal behavior and capacity in both tention and compression, that causes high energy absorption as a result of symmetric and stable cyclic behavior. All these...
HPASC – OPCC bi-surface Shear Strength Prediction Model Using Deep Learning
, M.Sc. Thesis Sharif University of Technology ; Toufigh, Vahab (Supervisor)
Abstract
Selecting a suitable material is crucial for repairing the old concrete structures and joining precast panels of bridges, especially the bond strength between the substrate concrete and the overlay material. In this regard, this research focused on high-performance alkali-activated slag concrete (HPASC) as a new concrete used as an overlay on ordinary Portland cement concrete (OPCC) as a block of old concrete. Approximately four hundred bi-surface shear (BSS) tests were performed to evaluate the interface properties of OPCC and HPASC. HPASC specimens were designed with different NaOH molarity, silica fume (SF) content, steel fiber content, age of repair material, and proportion of grooved...
Examining the Effect of Patent Registration on the Attraction of Venture Capital: the Moderating Role of Collaborative Patents In the Field of Artificial Intelligence
,
M.Sc. Thesis
Sharif University of Technology
;
Miremadi, Iman
(Supervisor)
Abstract
Artificial intelligence is a field that has made another revolution in the Fourth Industrial Revolution and has become one of the most widely used emerging technologies in the present era. Further investigation of the trends in this field shows that it has shown increasing growth in recent years. Also, in the future, this trend will continue and fundamental changes will occur in societies. For this reason, countries must definitely pay the necessary and sufficient attention to this field in their growth and development path. To achieve this growth path, it is intended to evaluate the status of leading countries in the field of artificial intelligence using two key variables in technological...