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Search Results: 1 - 10 of 14 matches for " Camel Tanougast "
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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.
First Experimental Solution for Channel Noise Sensibility in Digital Chaotic Communications
Said Sadoudi;Camel Tanougast;Mohamed Salah Azzaz
PIER C , 2012, DOI: 10.2528/PIERC12080906
Abstract: An interesting and original solution to the high channel noise sensibility problem of digital chaotic communications is proposed. The solution idea consist of avoiding disruption of the slave/receiver dynamics by injecting the driving signal. To realize experimentally this pertinent idea, an FPGA-based hardware architecture is developed, firstly to trigger the generation of the slave/receiver chaotic dynamics at each received data detection, and secondly to synchronize the driving signal with the slave generated chaotic signal for the demodulation operation. We have tested and validated the proposed solution through experimental realization of a wireless hyperchaotic communication system based on ZigBee communication protocol. Real-time results of experimental wireless communication tests are presented. The obtained results show the effectiveness and the robustness of the proposed solution against real channel noise in digital chaotic communications.
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.
Watermarking for Multimedia Security Using Complex Wavelets
Alastair Ian Thompson,Ahmed Bouridane,Fatih Kurugollu,Camel Tanougast
Journal of Multimedia , 2010, DOI: 10.4304/jmm.5.5.443-457
Abstract: This paper investigates the application of complex wavelet transforms to the field of digital data hiding. Complex wavelets offer improved directional selectivity and shift invariance over their discretely sampled counterparts allowing for better adaptation of watermark distortions to the host media. Two methods of deriving visual models for the watermarking system are adapted to the complex wavelet transforms and their performances are compared. To produce improved capacity a spread transform embedding algorithm is devised, this combines the robustness of spread spectrum methods with the high capacity of quantization based methods. Using established information theoretic methods, limits of watermark capacity are derived that demonstrate the superiority of complex wavelets over discretely sampled wavelets. Finally results for the algorithm against commonly used attacks demonstrate its robustness and the improved performance offered by complex wavelet transforms.
A Partitioning Methodology That Optimises the Area on Reconfigurable Real-Time Embedded Systems
Philippe Brunet,Serge Weber,Yves Berviller,Camel Tanougast
EURASIP Journal on Advances in Signal Processing , 2003, DOI: 10.1155/s1687617203212051
Abstract: We provide a methodology used for the temporal partitioning of the data-path part of an algorithm for a reconfigurable embedded system. Temporal partitioning of applications for reconfigurable computing systems is a very active research field and some methods and tools have already been proposed. But all these methodologies target the domain of existing reconfigurable accelerators or reconfigurable processors. In this case, the number of cells in the reconfigurable array is an implementation constraint and the goal of an optimised partitioning is to minimise the processing time and/or the memory bandwidth requirement. Here, we present a strategy for partitioning and optimising designs. The originality of our method is that we use the dynamic reconfiguration in order to minimise the number of cells needed to implement the data path of an application under a time constraint. This approach can be useful for the design of an embedded system. Our approach is illustrated by a reconfigurable implementation of a real-time image processing data path.
Enabling Self-Organization in Embedded Systems with Reconfigurable Hardware
Christophe Bobda,Kevin Cheng,Felix Mühlbauer,Klaus Drechsler,Jan Schulte,Dominik Murr,Camel Tanougast
International Journal of Reconfigurable Computing , 2009, DOI: 10.1155/2009/161458
Abstract: We present a methodology based on self-organization to manage resources in networked embedded systems based on reconfigurable hardware. Two points are detailed in this paper, the monitoring system used to analyse the system and the Local Marketplaces Global Symbiosis (LMGS) concept defined for self-organization of dynamically reconfigurable nodes.
In-Vitro Fermentation by Human Fecal Bacteria and Bile Salts Binding Capacity of Physical Modified Defatted Rice Bran Dietary Fiber  [PDF]
Cheickna Daou, Hui Zhang, Camel Lagnika, Oumarou Hama Moutaleb
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.512121

Defatted rice bran dietary fiber (DRBDF) was modified by micronization, ultrasound, microwave and extrusion cooking. We investigated the impacts of these physical treatments on the fermentation ability and bile salts binding capacity of DRBDF. In-vitro fermentation by human fecal bacteria of modified fibers showed that the major fermentation products were propionic, acetate and butyrate acid. Fermentation of extruded fiber gave the highest amounts of propionic and acetic acid 135.76 and 25.45 mmol/L respectively, while, the fermented product with microwaved fiber had the highest butyric acid content (10.75 mmol/L). The amount of short-chain fatty acid increased from 12 h to 24 h and propionic acid was the predominant. On the other hand,in-vitrobile salts binding showed that extruded fiber had higher affinity with sodium deoxycholate and sodium chenodeoxycholate (66.14% and 30.25% respectively) while microwaved fiber exhibited the highest affinity with sodium taurocholate (14.38%). In the light of obtained results we can affirmed that these physical treatments significantly improved the fermentation products and bile salts binding capacity of DRBDF. Extrusion compared to the other physical treatment methods used in this study has greatly and positively influenced the fermentation and bile binding capacity of DRBDF.

Effects of Pressurized Argon and Krypton Treatments on the Quality of Fresh White Mushroom (Agaricus bisporus)  [PDF]
Camel Lagnika, Min Zhang, Mohanad Bashari, Fatoumata Tounkara
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.412153

Effects of argon, krypton and their mixed pressure treatments on the quality of white mushrooms were studied during 9 days of storage at 4℃. Among all treatments in this study, the minimum respiration rate, polyphenoloxidase activity, retained color change, antioxidants and delayed pseudomonas growth were observed with pressure argon (5 MPa) followed by mixing argon and krypton (2.5 MPa each) treatments. Respiration rates after 9 days of storage were 5.35%, 6.20%, 7.50%, 7.60%, 7.91% and 8.95% for HA5, HAK, HA2, HK5, HK2 and control, respectively. DPPH inhibition percentages of free radical for HA5, HAK, HK5, HA2, HK2 and control mushrooms were 28.03%, 25.24%, 24.96%, 21.87%, 20.56% and 19.06%, respectively, after 9 days of storage. The pressurized argon treatment was the most effective compared to pressurized krypton. Thus, application of pressurized argon and krypton treatments could extend the storage life of white mushrooms to 9 days at 4℃.

Effect of Combining Ultrasound and Mild Heat Treatment on Physicochemical, Nutritional Quality and Microbiological Properties of Pineapple Juice  [PDF]
Camel Lagnika, Yann C. S. Adjovi, Latifou Lagnika, Fructueux O. Gogohounga, Ornella Do-Sacramento, Raoul K. Koulony, Ambaliou Sanni
Food and Nutrition Sciences (FNS) , 2017, DOI: 10.4236/fns.2017.82015
Increasing consumer awareness regarding the health benefits of different nutrients in food has led to the requirement of assessing the effect of food processing approaches on the quality attributes. The present work focuses on understanding the effects of ultrasound (US) processing, mild heat pasteurization (65°C for 15 min), thermal pasteurization (80°C for 15 min) and their combination on physicochemical, microbiological properties and nutritional quality of pineapple juice through 60 days of storage at room temperature. Ultrasound treatment showed significantly lower browning degree. Ultrasound followed by ultrasound combined with mild heat pasteurization (UMP) treatments was effective in retaining the total phenolic content of pineapple juice as compared to the thermal treatment or the untreated juice sample at room temperature during 60 days of storage. Thermal pasteurization (TP) followed by ultrasound combined with mild heat pasteurization (UMP) and ultrasound (US) treatment, in increasing order, was found to be effective in delaying microbial growth in pineapple juice. This study demonstrates that ultrasound combined with mild heat pasteurization treatments could be able to effectively inactivate the microorganisms and pectin methylesterase in pineapple juice whilst preserving relatively high amount of phenols.
Extraction, characterization, nutritional and functional properties of Roselle (Hibiscus sabdariffa Linn) seed proteins
Fatoumata Tounkara,Tidjani Amza,Camel Lagnika,Guo-Wei Le
Songklanakarin Journal of Science and Technology , 2013,
Abstract: Physicochemical, nutritional and functional properties of protein fractions and protein isolate (RSPI) from Roselle seedwere investigated. The protein content was 91.50, 93.77, 81.55, 71.30 and 40.83% for RSPI, globulin, albumin, glutelin andprolamin, respectively. The functional properties were variable among samples. Glutelin possessed the highest water holdingcapacity and albumin the lowest. The oil holding capacity ranged from 3.47 to 7.23 mL/g and the emulsifying capacity from95 to 18 mL/g. Glutelin had the higher foam capacity, while RSPI showed the more stable foam. The molecular weight of allsamples ranged from 55,000 Da to below 14,300 Da. All the estimated nutritional parameters based on amino acids compositionsuggested that Roselle protein fractions and its isolates have good nutritional quality and could be a good source of proteinfortification for a variety of food products for protein deficient consumers as well as a potential food ingredient.
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