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Search Results: 1 - 10 of 2606 matches for " Abbas Dandache "
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Carcinoma cell identification via optical microscopy and shape feature analysis  [PDF]
Ahmad Chaddad, Camel Tanougast, Andrew Golato, Abbas Dandache
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.611128
Abstract: Optical microscopy is commonly used for cancer cell detection. Focusing on carcinoma cell identification via optical microscopy, a proof-of-concept study was performed at Laboratory of Design, Optimization and Modeling (LCOMS) to determine the grade of cancer cells. This paper focuses on three types of abnormal cells; namely, Benign Hyperplasia (BH), Intraepithelial Neoplasia (IN), which is a precursor state for cancer, and Carcinoma (Ca), which corresponds to abnormal tissue proliferation cancer. These types of cells were used to assess the efficiency of using shape features to identify carcinoma cells. A comparative study based on performance indicator concludes that three features, Area, Xor-Convex, and Solidity, were found to be effective in identifying the Carcinoma grade of cancer cells.
A Self-Checking Hardware Journal for a Fault-Tolerant Processor Architecture
Mohsin Amin,Abbas Ramazani,Fabrice Monteiro,Camille Diou,Abbas Dandache
International Journal of Reconfigurable Computing , 2011, DOI: 10.1155/2011/962062
Abstract: We introduce a specialized self-checking hardware journal being used as a centerpiece in our design strategy to build a processor tolerant to transient faults. Fault tolerance here relies on the use of error detection techniques in the processor core together with journalization and rollback execution to recover from erroneous situations. Effective rollback recovery is possible thanks to using a hardware journal and chosing a stack computing architecture for the processor core instead of the usual RISC or CISC. The main objective of the journalization and the hardware self-checking journal is to prevent data not yet validated to be sent to the main memory, and allow to fast rollback execution on faulty situations. The main memory, supposed to be fault secure in our model, only contains valid (uncorrupted) data obtained from fault-free computations. Error control coding techniques are used both in the processor core to detect errors and in the HW journal to protect the temporarily stored data from possible changes induced by transient faults. Implementation results on an FPGA of the Altera Stratix-II family show clearly the relevance of the approach, both in terms of performance/area tradeoff and fault tolerance effectiveness, even for high error rates. 1. Introduction For years, a substantial research effort has been successfully devoted to increase the performance of processor architectures, while making the best profit of the technological improvements predicted by Moore’s law. However, the long-followed approach is reaching its limits. Indeed, the current technological boundaries are raising major constraints on future architectures, particularly in terms of reliability and fault tolerance, given the enlarging rates of physical defects and the increased sensitivity to external disturbances. Fault tolerance aims at building systems that behave satisfactorily even in the presence of faults. The tolerance of a system is devised to some predefined set of fault types that may include transient, intermittent, or permanent faults, depending on the fault causes being addressed. What can be considered as a satisfactory behavior can vary according to the application domains: a simple error detection with an error alarm indication may be acceptable in some cases while in other cases, the system must ensure operation continuity with no visible impact on the service being delivered. Transient faults, long while considered as a problem only in space applications and some other critical domains such as nuclear plants, are now becoming a significant threat at sea
A New Efficient and Reliable Dynamically Reconfigurable Network-on-Chip
Cédric Killian,Camel Tanougast,Fabrice Monteiro,Abbas Dandache
Journal of Electrical and Computer Engineering , 2012, DOI: 10.1155/2012/843239
Abstract: We present a new reliable Network-on-Chip (NoC) suitable for Dynamically Reconfigurable Multiprocessors on Chip systems. The proposed NoC is based on routers performing online error detection of routing algorithm and data packet errors. Our work focuses on adaptive routing algorithms which allow to bypass faulty components or processor elements dynamically implemented inside the network. The proposed routing error detection mechanism allows to distinguish routing errors from bypasses of faulty components. The new router architecture is based on additional diagonal state indications and specific logic blocks allowing the reliable operation of the NoC. The main originality in the proposed NoC is that only the permanently faulty parts of the routers are disconnected. Therefore, our approach maintains a high run time throughput in the NoC without data packet loss thanks to a self-loopback mechanism inside each router.
A Comment on Link Dynamics and Protocol Design in a Multi-Hop Mobile Environment  [PDF]
Abbas Nayebi
Wireless Sensor Network (WSN) , 2011, DOI: 10.4236/wsn.2011.33012
Abstract: This paper is a supplementary document for “Link Dynamics and Protocol Design in a Multi-Hop Mobile Environment” (ref. [1]), which presents an analytic model to obtain link lifetime in mobile wireless networks. The model outcome is used as groundwork for several mobility-related evaluations. Here, it is discussed how an improper assumption in the probabilistic model led to some errors in the resultant expressions. After a detailed description of the erratic assumption, a modification is proposed to correct the derivations. The results of the new model are verified by the simulation results provided at the original paper.
Quintessence of Traditional and Agile Requirement Engineering  [PDF]
Jalil Abbas
Journal of Software Engineering and Applications (JSEA) , 2016, DOI: 10.4236/jsea.2016.93005
Abstract: Requirement gathering for software development project is the most crucial stage and thus requirement engineering (RE) occupies the chief position in the software development. Countless techniques concerning the RE processes exist to make sure the requirements are coherent, compact and complete in all respects. In this way different aspects of RE are dissected and detailed upon. A comparison of RE in Agile and RE in Waterfall is expatiated and on the basis of the literature survey the overall Agile RE process is accumulated. Agile being a technique produces high quality software in relatively less time as compared to the conventional waterfall methodology. The paramount objective of this study is to take lessons from RE that Agile method may consider, if quality being the cardinal concern. The study is patterned on the survey of the previous research reported in the coexisting literature and the practices which are being pursued in the area.
Developing Innovative Concepts for Measuring and Assessing Transit System Maturity  [PDF]
Khaled Abbas
Journal of Transportation Technologies (JTTs) , 2017, DOI: 10.4236/jtts.2017.72013
Abstract: In this research three new innovative concepts are introduced and developed: the first defined as Transit System Maturity Components (TSMC), the second referred to as Transit System Maturity Scale (TSMS) and the third labeled as Transit System Maturity Index (TSMI). The TSMC is meant to conceptualise the main strategic generic components characterising the maturity of transit systems. The TSMS is an S shaped scaling system for measuring maturity of transit system components. The TSMI presents an innovative index meant to assess the overall level of maturity of a city transit system. Such framework is envisaged to be used to determine and compare the overall maturity levels of transit systems in cities of the world as well as to act as a basis to identify strengths & gaps that need to be addressed/completed. Furthermore, it can also act as an ingredient in shaping and developing future road maps for transit system in cities across the world. The research concludes by demonstrating the applicability of TSMC, TSMS, and TSMI in conducting an initial assessment of the Transit System Maturity for the fast growing city of Dubai.
Assessment & Improvement of Children Road Safety: A Pyramid & Honeycomb Structure Approach  [PDF]
Khaled Abbas
Journal of Transportation Technologies (JTTs) , 2017, DOI: 10.4236/jtts.2017.73017
Abstract: In this research, a 4 hierarchical pyramid structure approach is proposed to assess children road safety. The first is referred to as the road safety pyramid representing children road safety components and levels including root, at accident and post accident levels and factors. The second, referred to as the children road safety assessment pyramid, includes 3 cornerstones that are required to represent a detailed methodological children road safety diagnostics. These 3 cornerstones include children safety culture, safety indicators and accident data analysis. The third pyramid, referred to as the children road safety indicators, shows the levels and types of indicators that when computed can be used for in depth analysis and historical comparison of children road safety. The core of the paper is the development of a conceptual model of factors affecting the road behavior of children including traffic exposure and experience, cognitive skills and abilities, perceptual skills, knowledge and attitude. Towards this end, the paper presents the fourth pyramid, referred to as the children road safety behavior pyramid. This includes a 7-level hierarchal structure starting from exposure leading to experience and then skills/abilities, to knowledge to perception to attitudes and eventually culminating into children road safety behavior. The paper concludes by developing a generic integrated children road safety package of policies, measures, initiatives. The package is composed of 18 fields of action. In pursuing such integrated safety package this research also enhanced the classical 3Es concept (Engineering—Education—Enforcement) and introduced instead the 14Es honeycomb structure including (Engineer-ing—Education—Environment—Enforcement—Egalitarianism—Exposure—Ethics—Emergency—Ergonomics—Encouragement—Empowerment—Enabling—Economics—Evaluation). All in all this is meant to act as a generic benchmark guide/checklist for countries in compiling and tailoring children road safety programmes.
Comprehensive Information System on Mobile Devices via Bluetooth Application Server  [PDF]
Abbas Ali Lotfi Neyestanak
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.23039
Abstract: Advantage of cell phones and their rapid progress on facilities and applications, made a technical trend to develop software implementations for this kind of systems. On the other hand, Java package with some efficient tools and products made it quite desirable for producers in a wide range of applications. In this paper the Bluetooth technology has been studied and its defects and premiums and security threats are investigated and compared with other technologies. Finally a comprehensive information system is designed, simulated and implemented based on cell phone communications. This system actually utilizes the Bluetooth technology to send and receive variety of packets such as data, image, and sound between computer and cell phone. These transferred data are then processes at the either sides and the revealed data is presented to the user. Wide 100 meter coverage has been considered for this system utilizing advanced automatic traffic management routines.
One-Pot Three-Component Synthesis of Imidazo[1,5-a]pyridines  [PDF]
Abbas Rahmati, Zahra Khalesi
International Journal of Organic Chemistry (IJOC) , 2011, DOI: 10.4236/ijoc.2011.12003
Abstract: A one-pot three component condensation synthesis of imidazo[1,5-a]pyridines using of various aromatic aldehydes and dipyridil ketone with ammonium acetate in the presence of Lithium chloride as catalyst in good yields under microwave irradiation has been described.
Relevance of Mastery Learning (ML) in Teaching of English (Case Study of the University of Guilan, Iran)  [PDF]
Abbas Sadeghi, Atefeh Sadeghi
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.31007
Abstract: The main purpose of the study was to gather, analyze and interpret the perceptions of the students about mastery learning (ML) held by 240 students randomly selected from each of the populations of different faculties in Guilan University. Guilan University was chosen because the researchers have some valuable experiences about English learning and are familiar with students’ weakness in English learning. The students of high ability were allocated to “A” and “B” classes, average to “C” and “D” classes and low to “E” and “F” classes respectively. Two Academic Staff Members were assigned to teach the six classes of English. Students could take 3 classes with each academic. Results showed that based on research results on deep and surface, biased learners increasingly which became surface learners did worse compare with deep learners. On the other hand, surface students of low ability seem to be motivated to study as they are given more chances to secure a pass. Thus, although the findings of this paper indicate that mastery learning promotes better quantitative results in English for surface learners, there are dangers. One of the main aims of learning to increase higher level cognitive processes seems actually to be discouraged in this mode.
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