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Pitch Shifting of Arabic Speech Signal by Source Filter Modelling for Prosodic Transformations
Ykhlef Faycal,Ykhlef Farid,Bensebti Mesaoud,Guerti Mhania 보안공학연구지원센터 2008 International Journal of Software Engineering and Vol.2 No.2
This paper proposes a pitch shifting technique based on the use of Source Filter Model (SFM) by Linear Prediction. A complete solution is described, included estimation of model parameters, pitch detection, Unvoiced/Voiced (U/V) classification and speech synthesis at several pitch values. An automatic U/V classification is proposed using two methods, the Autocorrelation by thresholding and the Zero Crossing Rate (ZCR) versus Energy computation. The satisfactory performance of this technique is evaluated by listening tests using sentences in Standard Arabic Language. The limit range of pitch shifting for a clear speech synthesizing is found.
QoS Aware Radio Access Technology Selection Framework in Heterogeneous Networks using SDN
Alessandro Raschellà,Faycal Bouhafs,Deepak G.C.,Michael Mackay 한국통신학회 2017 Journal of communications and networks Vol.19 No.6
This paper addresses the problem of radio access technology(RAT) selection in heterogeneous networks (HetNets). Currentapproaches rely on signal related metrics such as signal tointerference plus noise ratio (SINR) for selection of the best networkfor the wireless user. However, such approaches do not takeinto account the quality of service (QoS) requirements of wirelessusers and therefore often do not connect them to the most suitablenetwork. We propose a QoS aware RAT selection frameworkfor HetNets based on software-defined networking (SDN). The proposedframework implements a RAT selection strategy that reflectsQoS requirements of downlink flows using a metric called fittingnessfactor (FF). The framework relies on the flexibility and centralisednature of SDN to implement monitoring and RAT capacityassessment mechanisms that help in the realisation of the selectionstrategy. The simulation campaign illustrates the important gainsachieved by our RAT selection framework in terms of data ratesassigned to the wireless users, their satisfaction, and their qualityof experience (QoE) compared against other state of the art RATselection solutions.
Cattaneo, Matteo,Morozumi, Yuichi,Perazza, Daniel,Boussouar, Faycal,Jamshidikia, Mahya,Rousseaux, Sophie,Verdel, Andre,Khochbin, Saadi Korean Society for Molecular and Cellular Biology 2014 Molecules and cells Vol.37 No.12
ATAD2, a remarkably conserved, yet poorly characterized factor is found upregulated and associated with poor prognosis in a variety of independent cancers in human. Studies conducted on the yeast Saccharomyces cerevisiae ATAD2 homologue, Yta7, are now indicating that the members of this family may primarily be regulators of chromatin dynamics and that their action on gene expression could only be one facet of their general activity. In this review, we present an overview of the literature on Yta7 and discuss the possibility of translating these findings into other organisms to further define the involvement of ATAD2 and other members of its family in regulating chromatin structure and function both in normal and pathological situations.
Single Star Identification and Attitude Determination in Tracking Mode
Masood-Ur-Rehman,Fang Jiancheng,Faycal Saffih,Quan Wei 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
The autonomous star trackers are among the most attractive attitude sensors, as they are capable to provide three-axis attitude information with high accuracy. Autonomous star tracker’ basic software algorithms include Star image centroiding, Star Pattern Recognition (SPR) and attitude determination. In the last few decades many SPR algorithms have been presented, almost all of them need at least two or three stars in star image, for successful SPR. Similarly almost all of the existing attitude determination algorithms need at least two identified stars in the star image. In the worst case if there is only one star in the image then SPR and hence the attitude determination becomes a problem. Just star magnitude alone can not be used to identify one star reliably due to poor magnitude measurement accuracy. However the scheme of automatic pattern recognition based on predictive centroiding in tracking mode, can be used to identify a single star. The position information of this identified single star can be used to form one or more empirical image stars from the reference catalog stars, for attitude determination. In this paper the problem of single star identification and attitude determination is addressed. Simulation results show that the proposed method to calculate the attitude has good accuracy, and it depends on the star tracker calibration and centroiding accuracies. This scheme is particularly useful in case where single star is identified and no other scheme can be used.
( Yasmine Derdour ),( Bouabdellah Kechar ),( Mohammed Faycal Khelfi ) 한국정보처리학회 2016 Journal of information processing systems Vol.12 No.2
A primary task in wireless sensor networks (WSNs) is data collection. The main objective of this task is to collect sensor readings from sensor fields at predetermined sinks using routing protocols without conducting network processing at intermediate nodes, which have been proved as being inefficient in many research studies using a static sink. The major drawback is that sensor nodes near a data sink are prone to dissipate more energy power than those far away due to their role as relay nodes. Recently, novel WSN architectures based on mobile sinks and mobile relay nodes, which are able to move inside the region of a deployed WSN, which has been developed in most research works related to mobile WSN mainly exploit mobility to reduce and balance energy consumption to enhance communication reliability among sensor nodes. Our main purpose in this paper is to propose a solution to the problem of deploying mobile data collectors for alleviating the high traffic load and resulting bottleneck in a sink’s vicinity, which are caused by static approaches. For this reason, several WSNs based on mobile elements have been proposed. We studied two key issues in WSN mobility: the impact of the mobile element (sink or relay nodes) and the impact of the mobility model on WSN based on its performance expressed in terms of energy efficiency and reliability. We conducted an extensive set of simulation experiments. The results obtained reveal that the collection approach based on relay nodes and the mobility model based on stochastic perform better.
Training and Development of Human Capital in Islamic Banking Industry
Norhanim Dewa,Sabarudin Zakaria,Mansouri Faycal 한국글로벌문화학회 2014 글로벌문화연구 Vol.5 No.2
The fascinating development and point of discussion in recent years is the rapid growth and expansion of the Islamic financial services industry. It is no longer rhetoric as Islamic finance has been accepted as viable and competitive mode of financial intermediation that offers wide range of financial products and services to meet the highly differentiated demands of the new economy; not only in Muslim countries but also beyond the Muslim world. Against these rapid revolution of Islamic financial industry globally and in Malaysia particularly, human capital has become the defining factor in sustaining the performance and competitiveness of Islamic financial industry. Thus it is crucial to place strong focus on human capital development in embarking Islamic financial services encompassing the basic foundation namely; education. A prerequisite requirement for highly talented and skilled labor force is essential to maximize the opportunities presented by the evolving economic environment in the future. The objective of this study is to determine the issues faced by practitioners that initiate the need to undertake training and development courses as well as to identify the type of training required by current practitioners that affect performance.
N. H. M. Bouchkara,Abdulmohsen Albedah,Faycal Benyahia,Sohail M. A. Khan Mohammed,Bel Abbes Bachir Bouiadjra 한국항공우주학회 2021 International Journal of Aeronautical and Space Sc Vol.22 No.5
In this study, we analyzed the effect of a single overload fatigue cycle on the efficiency of bonded composite patch repair on a cracked Al 2024 T3 aluminum plate. Experimental and numerical analyses were performed to achieve the objective of the study. In the experimental part of the study, fatigue tests were conducted on a V-notched aluminum plate subjected to a constant amplitude fatigue loading with an overload applied at a relative crack length of 0.06 (a/W = 0.06). The plate was repaired with a carbon/epoxy composite patch. A fatigue life curve (a = f(N)) was plotted for the patched and unpatched specimens using the results of the experimental tests, and scanning electron microscopy images of the fracture surfaces of the failed specimens were observed. In the numerical part, the elastic–plastic finite element method was used to evaluate the plasticity induced by the overload on the patched plate and to analyze the adhesive damage after this overload was applied. The obtained results demonstrate that the patch deposition of the overload can lead to an extended fatigue life, and the adhesive damage after the overload is quite significant, but the risk of total failure of the adhesive layer is not high.
Yasmine-Derdour, Yasmine-Derdour,Bouabdellah-Kechar, Bouabdellah-Kechar,Faycal-Khelfi, Mohammed Korea Information Processing Society 2016 Journal of information processing systems Vol.12 No.2
A primary task in wireless sensor networks (WSNs) is data collection. The main objective of this task is to collect sensor readings from sensor fields at predetermined sinks using routing protocols without conducting network processing at intermediate nodes, which have been proved as being inefficient in many research studies using a static sink. The major drawback is that sensor nodes near a data sink are prone to dissipate more energy power than those far away due to their role as relay nodes. Recently, novel WSN architectures based on mobile sinks and mobile relay nodes, which are able to move inside the region of a deployed WSN, which has been developed in most research works related to mobile WSN mainly exploit mobility to reduce and balance energy consumption to enhance communication reliability among sensor nodes. Our main purpose in this paper is to propose a solution to the problem of deploying mobile data collectors for alleviating the high traffic load and resulting bottleneck in a sink's vicinity, which are caused by static approaches. For this reason, several WSNs based on mobile elements have been proposed. We studied two key issues in WSN mobility: the impact of the mobile element (sink or relay nodes) and the impact of the mobility model on WSN based on its performance expressed in terms of energy efficiency and reliability. We conducted an extensive set of simulation experiments. The results obtained reveal that the collection approach based on relay nodes and the mobility model based on stochastic perform better.