Implementation of an acoustic echo canceller based on NLMS-neural networks structures by using the VHDL
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220)
A cascaded pipelined recurrent neural network/NLMS structure is employed in an attempt to model t... more A cascaded pipelined recurrent neural network/NLMS structure is employed in an attempt to model the room/speakerphone transfer function and acoustic path in a hands-free environment. To investigate the feasibility of practical hardware implementation of the proposed structure, this paper aims at implementing the pipelined recurrent neural network and NLMS algorithms by using VHDL. VHDL is the name of the IEEE
The global healthcare delivery paradigm shift calls for enhanced strategies to engage patients in... more The global healthcare delivery paradigm shift calls for enhanced strategies to engage patients in delivering safer and high-quality healthcare. There still exists a gap area in a globally accepted measure for the person-centered care. Recent tri-institutional global quality reports from National Academies of Sciences, Engineering, and Medicine (NAESM), World Bank Group, and Lancet Global Health Commission attempted to report the patient engagement measures used globally. We aim to understand the variation in these globally reported patient-centered care measures and highlight the recent proactive strategies to enhance patient engagement to improve patient safety.
Probiotics are ubiquitous, consumption by the general public is common, and the dogma remains tha... more Probiotics are ubiquitous, consumption by the general public is common, and the dogma remains that they are beneficial for general and gut health. However, evolving evidence suggests a potentially "harmful" impact of many commercially available probiotics. There is also significant variability in formulations that leads to a lack of a universally acceptable definition of probiotics. In this perspective, we review the flaws with definition, relevant observational and randomized studies that showed both positive and negative impacts on health and disease, unbiased interpretation of key trials, emerging evidence from microbiome and immuno-oncological studies, and impact on systemic immunity. We propose that caution be exercised prior to endorsements of their illness-directed consumption and rampant general usage. As a deeper understanding of the human microbiome accrues and our ability to manipulate this complex ecosystem improves, the probiotic of tomorrow might be the precision tool that deals with diseases on a broad front. Gut microbiome, akin to fingerprints, is indigenous to an individual and 'one size fits all' prescription strategy should be discouraged until a more universally acceptable 'favorable taxa' or a 'personalized probiotic,' to complement an individual's native microbiota, gets fashioned.
Arbitration schemes synthesis approach for multiprocessor systems
1998 IEEE Workshop on Signal Processing Systems. SIPS 98. Design and Implementation (Cat. No.98TH8374)
ABSTRACT The aim of this paper is to present an arbiter synthesis approach stated as an arbitrati... more ABSTRACT The aim of this paper is to present an arbiter synthesis approach stated as an arbitration scheme generation/selection problem. This approach may be easily inserted in an extendible system co-design methodology. It assumes that many co-design tasks have been performed, and it aims to automate the resolution of the access conflict problem that may be inevitably encountered whenever there is a resource contention in the system. The proposed approach allows us to transform a system composed of high-level processes that share the same channels and the same variables in a disordered manner into a set of processes executed by interconnected processors and hardware devices (e.g., ASIC, FPGA, etc.) that share the same resources such as memories and buses using the most efficient arbitration scheme. This approach is basically based on an algorithm that allows respectively the automatic generation/selection of the arbitration scheme, and the fixed priority assignment in a manner that minimizes the real-time cost
Turkish Journal of Engineering and Environmental Sciences
This paper presents a detailed computational procedure for predicting the complete thermal histor... more This paper presents a detailed computational procedure for predicting the complete thermal history including transient temperature distribution during girth welding and subsequent post weld cooling of low carbon steel pipe flange joints. Using the FE code ABAQUS, 3-dimensional non-linear heat transfer analysis is carried out to simulate gas metal arc welding (GMAW) process. ANSI Class #300 flange is used with a 6 mm thick, 200 mm long and 100 mm nominal diameter pipe. Joint type is a single 'V-groove' butt joint with a 1.2 mm root opening. FORTRAN subroutine is utilized for the application of volumetric heat flux from the weld torch using Goldak's double ellipsoidal heat source model, which is based on Gaussian power density distribution. Temperature dependent thermal properties as well as phase change effects have also been accounted. Apart from comprehensive discussion on the thermal history, in-depth analysis of the axial temperature profile at four different sections on both sides of the weld joint is presented. The simulated results showed that the temperature distribution around the implemented heat source model is steady when the weld torch moves around the circumferential joint. The present simulation model can be used as a proper tool to investigate the effect of different GMAW process parameters.
Cognitive Radio is a new technology that increases spectrum efficiency by increasing spectrum uti... more Cognitive Radio is a new technology that increases spectrum efficiency by increasing spectrum utilization. In this research paper, a novel ultra-wideband (UWB) printed monopole antenna that is compatible with cognitive radio front end is presented. The submitted antenna is designed to operate in 3.0 GHz to 12 GHz bandwidth. It consists of a half circular disc printed monopole antenna with rectangular slot on the half circular radiator and a ground plane on the reverse side of the substrate. A prototype of the antenna have been fabricated and comparison is performed for impedance matching, radiation pattern between simulated and measured results. Good qualitative agreement between simulated and measured results is observed, which authenticated the proposed antenna design concept for cognitive radio applications.
The Unified Modeling Language (UML) does not fully address the needs of some important modeling d... more The Unified Modeling Language (UML) does not fully address the needs of some important modeling domains, including goals and non-functional requirements (NFR). However, UML can be extended and tailored through the definition of profiles. In this paper, we propose a UML profile for the Goal-oriented Requirement Language (GRL), the goal/NFR notation of the User Requirements Notation (URN), recently standardized by ITU-T as Recommendation Z.151. Our profile is based on the abstract metamodel of GRL defined in accordance with ITU-T Recommendation Z.111 (meta-metamodel). This GRL metamodel has already been successfully tested and implemented in the jUCMNav Eclipse plug-in (a URN modeling tool). The profiling approach used in this paper adheres to the guidelines for UML profile design defined in ITU-T Recommendation Z.119. The resulting profile has been implemented in a UML 2 tool, namely IBM Rational Tau 4.0, and validated with case studies. Our experience and lessons learned are also discussed.
COSMOS: a codesign approach for communicating systems
Third International Workshop on Hardware/Software Codesign
COSMOS: A CoDesign Approach for Communicating Systems Tarek Ben Ismail, Mohamed Abìd, Ahmed Jerra... more COSMOS: A CoDesign Approach for Communicating Systems Tarek Ben Ismail, Mohamed Abìd, Ahmed Jerraya TIMA/INPG Laboratory, System-Level Synthesis Group, 46 Av. Félix Viallet, 38031 Grenoble Cedex, FRANCE Abstract This paper presents COSMOS, a ...
Towards a user interface generation approach based on object oriented design and task model
Proceedings of the 4th international workshop on Task models and diagrams - TAMODIA '05, 2005
Adel Mahfoudhi Department of Computer Science, Science Faculty of Sfax Rte Soukra km 3,5 BP : 802... more Adel Mahfoudhi Department of Computer Science, Science Faculty of Sfax Rte Soukra km 3,5 BP : 802 3018 Sfax (TUNISIA) adel.mahfoudhi@fss.rnu.tn ... Mohamed Abid National Engineering School of Sfax Rte Soukra 3018 Sfax (TUNISIA) mohamed. abid@enis.rnu.tn
Design of monitoring device block for all-optical components
2007 ICTON Mediterranean Winter Conference, 2007
Performance management is still a major complication for all-optical networks (AONs). In particul... more Performance management is still a major complication for all-optical networks (AONs). In particular, signal quality monitoring is too difficult in AONs as the analogue nature of optical signals means that miscellaneous transmission impairments aggregate and can impact the signal quality enough to reduce the Quality of Service (QoS) without precluding all network services. This results in the continuous monitoring and
2010 5th International Design and Test Workshop, 2010
Actual dynamic applications, executed on real-time systems, have the tendency to be built on dyna... more Actual dynamic applications, executed on real-time systems, have the tendency to be built on dynamically reconfigurable hardware devices. These applications require high performance and flexibility towards user and environment needs. To perform these application requirements, efficient mechanisms to manage hardware device must exist. In this paper we target OLLAF as a dynamically reconfigurable architecture which is designed to support complex and flexible applications. In order to deal with all of the dynamic aspects of such systems, we describe a predictive scheduling allowing an early estimation of our application dynamicity. A vision system of a mobile robot and an application of 3D synthesis images were served to validate the presented scheduling approach.
Tarbela dam is one of the largest earth filled dam in the world used for power generation and irr... more Tarbela dam is one of the largest earth filled dam in the world used for power generation and irrigation purposes. Like all reservoirs the sediments inflow in the Tarbela reservoir has resulted in reduction in water storage capacity and is also causing damage to the tunnels, power generating units and ultimately to the plant equipment. This numerical study was performed to predict the flow patterns and characteristics in Tarbela dam. Tunnel 3 and 4 inlets; originally on the bed level were raised in the 3-D model and meshed. Analysis was performed using multiphase flow (water and air) for maximum inflow in the reservoir, i.e., considering summer season and discharging water through different locations, i.e., tunnels and spillways. Pressure, velocities, flow rate and free surface height results obtained were found in good agreement with the analytical and existing results where available. Results show uneven discharge through each gate due to maximum velocity near exits and overall stagnant phenomena of water within the reservoir. Maximum velocity was observed along the spillways outlet. Strong vortex motion was observed near the spillways outlet and tunnel inlets. New design of Tunnels 3 and 4 were suggested to WAPDA in order to decrease the sediment inflow and improvements in design of the spillways were suggested.
Hardware/Software Co-Verification: Models and Methods
Systems Analysis Modelling Simulation, 2002
An efficient hardware-software co-verification methodology is essential in the design of systems ... more An efficient hardware-software co-verification methodology is essential in the design of systems on boards (SOB) and systems on chips (SOC). The increasing complexity of hardware and software makes the challenge of their integration more difficult than ever. This paper addresses the correctness verification of mixed hardware-software systems prior to IC fabrication. It presents the requirements of an efficient verification methodology,
In emerging all-optical networks (AONs), efficient monitoring and estimation of signal quality al... more In emerging all-optical networks (AONs), efficient monitoring and estimation of signal quality along a lightpath are of highest interest because of their importance in diagnosing and assessing the overall health of the network. This is because transmission in these networks is limited by a number of effects such as optical crosstalk and amplified spontaneous emission. In particular, crosstalk is additive
Design and implementation of a nonlinear acoustic echo canceller
1998 IEEE Workshop on Signal Processing Systems. SIPS 98. Design and Implementation (Cat. No.98TH8374)
Abstract An acoustic echo canceller based on neural networks and a fast affine projection (FAP) a... more Abstract An acoustic echo canceller based on neural networks and a fast affine projection (FAP) algorithm is introduced. This structure allows a large set of trade-offs between convergence rate, residual error, tracking capacity, and arithmetic complexity. Hence, the ...
2014 IEEE Ninth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP), 2014
The Internet is smoothly migrating from an Internet of people towards an Internet of Things (IoT)... more The Internet is smoothly migrating from an Internet of people towards an Internet of Things (IoT). By 2020, it is expected to have 50 billion things connected to the Internet. However, such a migration induces a strong level of complexity when handling interoperability between the heterogeneous Internet things, e.g., RFIDs (Radio Frequency Identification), mobile handheld devices, and wireless sensors. In this context, a couple of standards have been already set, e.g., IPv6, 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks), and M2M (Machine to Machine communications). In this paper, we focus on the integration of wireless sensor networks into IoT, and shed further light on the subtleties of such integration. We present a real-world test bed deployment where wireless sensors are used to control electrical appliances in a smart building. Encountered problems are highlighted and suitable solutions are presented.
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