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Robust and Large Hiding Capacity Steganography using Spread Spectrum and Discrete Cosine Transform
Samy Ghoniemy,Omar H. Karam,Osman Ibrahim
International Journal of Image Processing and Visual Communication , 2013, DOI: ijipvcv1i401
Abstract: Most information hiding methods present in theliterature have one general principle in common: they hide thesecret message within an insignificant component, such asnoise, of the cover or carrier. Most of these methods do notpay attention to the statistical properties of the noisecomponents and change the statistical profile of the coversignificantly hence leading to the simplicity of breaking thesystem by a passive attacker. In this paper an adaptivesteganography algorithm is proposed that encrypts the secretmessage and spreads it in highly noisy image regions of acarrier image using spread spectrum and discrete cosinetransform methods. A modified message embedding method isalso introduced that is based on comparative blocks, transformand Bit Plane Complexity Segmentation (BPCS) embeddingtechniques to increase the data hiding capacity. Traditionaltechniques have limited data hiding capacities of up to 18% ofthe data amount of a carrier image. The integration of thesetechniques increased the hiding capacity to approximately62%.
Automated Brain Tumor Detection and Identification Using Image Processing and Probabilistic Neural Network Techniques
Dina Aboul Dahab,Samy S. A. Ghoniemy,Gamal M. Selim
International Journal of Image Processing and Visual Communication , 2012, DOI: ijipvcv1i201
Abstract: In this paper, modified image segmentationtechniques were applied on MRI scan images in order to detectbrain tumors. Also in this paper, a modified Probabilistic NeuralNetwork (PNN) model that is based on learning vectorquantization (LVQ) with image and data analysis andmanipulation techniques is proposed to carry out an automatedbrain tumor classification using MRI-scans. The assessment ofthe modified PNN classifier performance is measured in terms ofthe training performance, classification accuracies andcomputational time. The simulation results showed that themodified PNN gives rapid and accurate classification comparedwith the image processing and published conventional PNNtechniques. Simulation results also showed that the proposedsystem out performs the corresponding PNN system presented in[30], and successfully handle the process of brain tumorclassification in MRI image with 100% accuracy when thespread value is equal to 1. These results also claim that theproposed LVQ-based PNN system decreases the processing timeto approximately 79% compared with the conventional PNNwhich makes it very promising in the field of in-vivo brain tumordetection and identification.
Exploring Trusted Relations among Virtual Interactions in Social Networks for Detecting Influence Diffusion
Heba M. Wagih,Hoda M. O. Mokhtar,Samy S. Ghoniemy
ISPRS International Journal of Geo-Information | An Open Access Journal from MDPI , 2019, DOI: https://doi.org/10.3390/ijgi8090415
Abstract: Recently, social networks have shown huge potential in terms of collaborative web services and the study of peer influence as a result of the massive amount of data, datasets, and interrelations generated. These interrelations cannot guarantee the success of online social networks without ensuring the existence of trust between nodes. Detecting influential nodes improves collaborative filtering (CF) recommendations in which nodes with the highest influential capability are most likely to be the source of recommendations. Although CF-based recommendation systems are the most widely used approach for implementing recommender systems, this approach ignores the mutual trust between users. In this paper, a trust-based algorithm (TBA) is introduced to detect influential spreaders in social networks efficiently. In particular, the proposed TBA estimates the influence that each node has on the other connected nodes as well as on the whole network. Next, a Friend-of-Friend recommendation (FoF-SocialI) algorithm is addressed to detect the influence of social ties in the recommendation process. Finally, experimental results, performed on three large scale location-based social networks, namely, Brightkite, Gowalla, and Weeplaces, to test the efficiency of the proposed algorithm, are presented. The conducted experiments show a remarkable enhancement in predicting and recommending locations in various social networks. View Full-Tex
Hydromorphological Mapping and Analysis for Characterizing Darfur Paleolake, NW Sudan Using Remote Sensing and GIS  [PDF]
Samy Ismail Elmahdy
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.31004
Abstract: The north-western part of Sudan, which is the driest region on earth has revealed newly surface and near surface paleodrainage network underneath sand sheets indicating the possibilities for economic groundwater reservoirs. Advanced Space-born Thermal Radiometer (ASTER), the Shuttle Radar Topography Mission (SRTM ~90 m) DEMs and Quickbird images corroborate the presence of surface and near surface paleodrainage network. Bivariate quadratic surfaces with moving window size of 3 × 3 were fitted to the SRTM DEM. The second derivative surface curvature was calculated to reveal landform classes that may receive most of fossil water. The results showed that the new unnamed depression which recharges by a longitudinal paleodrainage network may receive vast amount of groundwater during humid phases. The results demonstrate that the D8 and curvature algorithms are very efficient tools for revealing and characterizing hydrological elements in arid and semi-arid regions and they provide information for hydrological exploration in remote deserts over large scale prior to geophysical survey.
Identity, “Identology” and World Religions  [PDF]
Samy S. Swayd
Open Journal of Philosophy (OJPP) , 2014, DOI: 10.4236/ojpp.2014.41006
Abstract:

Identity serves as a vehicle for World Religions (WRs), and WRs are indispensable in the study of identity—Identology. The concept “identity” itself has become an overly used deflationary term that has lost some of its connotation, authenticity, or effectiveness. The claim for a persistent identity is slowly becoming scarce or often illusory. This paper explores the meanings and manifestations of the terms “identity” and “identification,” and then reintroduces “sense of identity” as a more evocative construct for the 21st century, especially in the context of WRs. Sense of Identity is then operationalized into three primary components: 1) personal beliefs, 2) communal attributes, and 3) sociopolitical attitudes, or for the sake of brevity, beliefs, attributes, and attitudes. These three key components furnish a concentric model with beliefs at the core, attributes surrounding that core, and attitudes at the periphery. But this theoretical model is incomplete without a second pivotal structure of concentric circles drawn from different perceptions of Sense of History, with the personal view of history at the core, the communal view of history surrounding that core, and the dominant historiography inhabiting the periphery. These two structures may differ in their configuration from one person or community to another, and from one time to another, but they interact with, shape, and are shaped by, each other. Eventually, the two structures merge into one coherent, sensible, and emancipatory model for any discourse on WRs.

Thermogravimetric Analysis of Swine Manure Solids Obtained from Farrowing, and Growing-Finishing Farms  [PDF]
Mahmoud Sharara, Samy Sadaka
Journal of Sustainable Bioenergy Systems (JSBS) , 2014, DOI: 10.4236/jsbs.2014.41008
Abstract:

The modern trend of increasing the number of pigs at production sites led to a noticeable surplus of manure. Separation of manure solids provides an avenue of their utility via thermochemical conversion techniques. Therefore, the goal of this paper was to assess the physical and thermal properties of solid separated swine manure obtained from two different farms, i.e., farrowing, and growing-finishing, and to determine their pyrolysis kinetic parameters. Swine manure solids were dried and milled prior to assessing their properties. Differential and integral isoconversional methods (Friedman, and Flynn-Wall-Ozawa) were used to determine the apparent activation energy as a function of the conversion ratio. Significant differences were observed in the proximate, ultimate composition between both manure types. The higher heating value (HHV) for the manure solids from farrowing, and growing-finishing farms reached 16.6 MJ/kg and 19.4 MJ/kg, respectively. The apparent activation energy computed using Friedman and FWO methods increased with the increase in the degree of conversion. Between 10% and 40% degrees of conversion, the average activation energies, using Friedman method, were103 and 116 kJ/mol for the farrowing and growing-finishing manure solids, respectively. On the other hand, the same activation energies, calculated from FWO method, were 98 and 104 kJ/mol, for solid manure obtained from farrowing and growing-finishing farms, respectively. The findings in this study will assist in the effort to optimize thermochemical conversion processes to accommodate swine waste. This could, in turn, minimize swine production impacts on the surrounding ecologies and provide sustainable energy and biochar streams.



Induction of Labor at 39 Weeks versus Expecting Labour till 41 Weeks: Randomized Controlled Trial on Class I Obese Egyptian Women, with Mode of Delivery Being a Study Endpoint  [PDF]
M. Samy, Sarah Safwat
Open Journal of Obstetrics and Gynecology (OJOG) , 2019, DOI: 10.4236/ojog.2019.96085
Abstract: Background: Maternal obesity is reported to be associated with increased incidence of gestational diabetes mellitus and hypertension. These cause failure of labour induction, leading to higher incidence of cesarean section (CS). The aim of this study was to assess which reduces CS rate, labor induction at 39 weeks or leaving women for spontaneous labor onset till 41 weeks. Methodology: A randomized controlled trial was conducted in Ain Shams Maternity Hospital in Egypt from 2016 to 2018. Study population consisted of 200 term primigravida pregnant obese women delivered in Ain Shams Maternity Hospital. They were divided into two groups: Group A: induction of labor at 39 + 0 weeks (n = 100) by vaginal administration of 25 μg misoprostol (PGE1) every 6 hours for 5 doses; Group B: waiting spontaneous labor onset till 41 + 0 weeks (n = 100), and if no spontaneous labor occurred at 41 weeks, induction was performed in the same way. Results: Induction (Group A) vs. waiting spontaneous labor (Group B) showed the followings, which were significant: CS: 22% vs 39%, p = 0.009; maternal birth injury: 4% vs 12%, p = 0.037; non-assisted vaginal deliveries: 93.6% vs 78.7%, p = 0.034; APGAR scores at 1 & 5 min: 7.6 ± 0.8 vs 7.3 ± 1.1 p = 0.038, 8.4 ± 1.0 vs 8.1 ± 1.3 p = 0.040, respectively; birth weight; 3.3 ± 0.1 vs 3.5 ± 0.2 kg, p < 0.001. The following did not show significance between Group A vs Group B but Group A showed lower incidence; postpartum hemorrhage: 3% vs 5%, blood transfusion: 1% vs 3%. Conclusion: CS rate was significantly lower in women with induction of labor at 39 weeks than those waiting for spontaneous labor onset till 41 weeks in obese Egyptian pregnant women.
A Dedicated Web-Based Learning System
Said Ghoniemy,Ashraf Fahmy,Sultan Aljahdali
Universal Journal of Computer Science and Engineering Technology , 2010,
Abstract: The fields of Learning Management Systems (LMS) and Learning Content Management Systems (LCMS) are full of open source and commercial products including Blackboard, WEB CT, and Moodle. These systems are tutor-oriented, not designed to facilitate personalized learning support for an individual learner. Professors and students, frustrated with current LMS, need a new, innovative, user-friendly alternative to encourage and empower students to take control of their education, and teachers to explore new styles of teaching, depending on their students’ needs. Most of the students in the developing world, specially in the middle east region, suffer from limited English proficiency, in addition to limited computer skills. These obstacles compose a barrier to, and impose limitations on the design and implementation of E-learning systems. This paper introduces a prototype for a simple, dedicated, learner-oriented e-learning system to facilitate the learning process. The proposed system enables the student (even with moderate English level and general IT knowledge) to wander through the system, and register for a specific course to make use of the scientific material available there in. In addition, the design of a computer engineering course conforming SCORM standards is introduced. The proposed prototype is made available for students to examine and evaluate. Feedbacks will be analyzed and enhancements will be proposed.
Synthesis of Chained Achromatic Layer Systems Forming Controlled Low Transmittance Bands  [PDF]
Mohamed Medhat, Samy S. Farag
Optics and Photonics Journal (OPJ) , 2011, DOI: 10.4236/opj.2011.13021
Abstract: The approach utilized in the design of achromatic periods formed of two layers a high-index and a low-index is developed by combining the first two periods together. These two periods are therefore reduced to three layers a central one, an upper layer and a lower layer. Both the upper and lower layers are matched to the central at two different wavelengths. This forms the so called a combined achromatic period or the basic unit. Multilayers showing low transmittance bands are then synthesized of this basic unit. Parameters used in the synthesis of such multilayers are pointed out and their control role is investigated.
Skin Nodules as a First Presentation of Metastatic Invasive Lobular Carcinoma: Case Presentation  [PDF]
Mohsen Samy Barsoum, Emad Mohsen Samy Barsoum, Hany Samy Attallah, Hany Nader Victor
Advances in Breast Cancer Research (ABCR) , 2018, DOI: 10.4236/abcr.2018.72009
Abstract: Primary breast carcinoma is the most common cause of cutaneous metastases in adult females, comprising about one fourth of patients with the disease. Although CM usually manifests as a late event in the course of a known neoplasm, they are rarely the presenting sign of an undiagnosed malignancy. Invasive Lobular carcinoma is known to be more likely to spread to unusual sites.
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