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Browsing FACULTY OF NATURAL & APPLIED SCIENCES by Title

Browsing FACULTY OF NATURAL & APPLIED SCIENCES by Title

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  • Post mining pruning methods 
    Aad, Elie (Notre Dame University-Louaize, 2002)
    Mining association rules has been an important topic in data mining research in recent years from the standpoint of supporting human-centered discovery of knowledge. The present day model of mining association rules suffers from the following shortcomings: (i) lack of user exploration and control, (ii) lack of focus, (iii) huge number of rules technically unreadable. All data mining researchers, have given a high importance on developing fast algorithms for rules discovery, and have applied different types of constraints in different algorithms to prune item sets, that do not occur frequently ...
  • Post Quantum Hybrid Network Security and Architecture 
    Essaye, Anthony (Notre Dame University-Louaize, 2021)
    Quantum Computers, the next wave of computing, and an emerging field in computer science have brought numerous advancements to problem solving and a quantum approach to programming a certain machine. This thesis tackles three main areas in the approach to quantum computers. First, the thesis provides a state-of-the-art review to Quantum computers/ Second it proposes a timeline for the progress of the technology and highlights the importance of early action. Finally, it focuses on the implications of such advancements on the current standards of network security. Specifically, it proposes ...
  • Potent antifungal activity of saponins from medicinal plants against candida albicans 
    Nader, Ingrid (Notre Dame University-Louaize, 2021)
    Candida albicans, is usually a harmless fungus in healthy individuals, but life-threatening when found in large quantities or in inappropriate parts of the body. It developed resistance against the antifungal drugs fluconazole and amphotericin B, used in an abusive way, by adopting different mechanisms. Medicinal plants, which offer a wide variety of secondary metabolites, especially saponins, have been reported for their large biological activities. These phytochemicals are composed of a hydrophobic part (aglycone) and a hydrophilic one (glycone), which, based on their aglycone part, are ...
  • Practical results from hits with new heuristics for assigning the link weights 
    Karaa, George Emile (Notre Dame University-Louaize, 2001)
    This thesis addresses the problem of analysis the Web hyperlink structure in order to locate authoritative web pages relevant to a certain query subject. In particular, we discuss the HITS algorithm, a pioneering method that exploits the web link structure in order to locate important information sources, as well as other algorithms based on HITS such as ARC and Page Rank. We experiment with different aspects of HITS, and introduce new heuristics for assigning the link weights based on textual contexts.
  • Pratical results from artificial economy with application to reinforcement learning 
    Soueidy, Amine (Notre Dame University-Louaize, 2001)
    This thesis discusses the topic of learning in a complex environment. Both the historical basis of the field and a broad selection of the current works are summarized. Reinforcement learning is the problem faced by an agent that learns behavior through trial-and-error interactions with a dynamic environment. The work described here has a resemblance to work in psychology, but considerably in the details and in the use of the word "reinforcement". We describe the foundations of new field of reinforcement learning named artificial economy. We experiment with a prototype based on the artificial ...
  • Preliminary assay for extraction of saponins from Styrax Officinalis and characterization of emulsifying properties of their extract 
    Ghosn, Marc (Notre Dame University-Louaize, 2020-07)
    An extraction protocol for saponins of Styrax Officinalis plant was adopted, modified and successfully applied. The extract obtained was tested by stabilizing Oil-in-Water emulsions. Ethanol extraction and successful one-step partial purification using AB-8 adsorption column chromatography yielded positive colorimetric (Vanillin – Sulfuric Acid) TLC results. The 3D structure of the four Styrax Officinalis saponins reported in the literature were rendered for the first time, and their partitioning properties exclusively acquired using Marvin Sketch chemical drawing software. 10% w/w Sunflower Oil ...
  • Propaganda in digital communication, twitter predictive module based on user behavior 
    Sfeir, Mikel (Notre Dame University-Louaize, 2021)
    “In the truth there is no news and in the news there is no truth”, a soviet-era political joke, still applies to the present times. This study will highlight all the communication forms and how they are used nowadays as a tool for propaganda especially in the digital world. When website traffic, clicks, and reach are at stake, information disorder in the form of misleading/fake information would be used as a tool to enhance data metrics across the digital world. This study tackles information disorder during all its phases: creation, production, communication, and the user experience through ...
  • A proposed algorithm for the derivation of consumer profile from minimal transactional data 
    Mhanna, Françoise (Notre Dame University-Louaize, 2006)
    The 80/20 rule says that 20% of the customers produce 80% of the sales; this rule indicates the existence of hidden sales potentials that must be revealed. Those hidden sales potentials can only be discovered by building acustomer profile. A smart customer profile finds the high potential targets, creates CRM strategies, and starts programs to sell the hidden targets. Shifting just a small percentage of the customers whom are not generating profit to the top group of customers generating profit adds significantly sales growth increase profits. Customer profile puts the full picture together to ...
  • A proposed approach to metadata modeling 
    Hashem, Jinane N. (Notre Dame University-Louaize, 2005)
    Metadata is considered a very useful and valuable component in handing data and delivering decisional information, in managing contents on the Internet, in databases and warehouses, in enabling the finding of relevant information, and in effectively providing a multiplicity of useful services. Data, in point of facts, can be metaphorically compared to a dead substance; and all acknowledge the fact that data, by merely existing in systems, represents almost nothing. However, it is the awareness of the exact length and value of this data that builds the valuable expensive information. This thesis ...
  • Reducing power consumption in wireless sensors networks 
    Azar, Edgard (Notre Dame University-Louaize, 2004)
    The emerging field of wireless sensor networks combines sensing, computation, and communication into a single tiny device. Through advanced mesh networking protocols, these devices form a sea of connectivity that uses any possible communication path by hopping data from one node to another in search of its destination. While the capabilities of any single device are minimal, the collection of hundreds of sensors offers major new technological possibilities. Examples of usage scenarios for these devices are real-time tracking and security monitoring, issues that will be studied in this thesis. ...
  • Role Base Access Control and its administrative implementation with Windows 2000 
    Akhras, Chukri (Notre Dame University-Louaize, 2003)
    Administration of access control was and still is a crucial, critical and complex aspect of Security Administration. Many models were developed and used to effect this administration such as Mandatory access Control (MAC), Discretionary Access Control (DAC) and Role Base access Control. the latter, RBAC which is a flexible and policy-independent access control, represents a natural structure of an organization where functions are grouped into roles and users are permitted to one or more of these roles. In large organizations with relatively large systems, with hundreds of roles and users and ...
  • Security of electronic banking in Lebanon : status and prospects 
    Abboud, Joelle P. (Notre Dame University-Louaize, 2005)
    Internet banking is somehow a new technology used by banks to interact with their customers providing them with a wide range of services available online. These services can be classified into 5 categories: informational, administrative, transactional, portal and others. However with these come new challenges, risks and threats when adapting internet banking that are either inherited from the internet or that are specific to the open banking environment. Therefore, specific security requirements to the internet banking environment should be adopted aiming to control these risks and manage ...
  • Segmentation of textured images using gibbs random fields 
    El-Hayek, Naji R. (Notre Dame University-Louaize, 2000)
    In this thesis digital image is introduced as an amount of data, which is produced when a 2-D light intensity function is sampled and quantized to create a digital image. Its principle objective is to define the segmentation process, in which we can partition an image into meaningful regions that correspond to part of, or the whole of objects within a scene. This is done by systematically dividing the whole image up into its constituent areas or regions. If the regions do not correspond directly to a physical object, or object surface, then they should correspond to some area of uniformity. Major ...
  • Serendipity-aware noise detection for recommender systems 
    El Khoury Badran, Miriam (Notre Dame University-Louaize, 2019-05)
    With the rise of the Internet, recommender systems are becoming a used solution to solve the information overload problem. These systems are like any other system, subject to noise: malicious noise that is caused by attacks and natural noise that is due to the human error. Many detection algorithms solve the noise problem. However, since natural noise and serendipity overlap in their definition, removing noise results in removing serendipity. Serendipity that is the happy surprise of finding something relevant unexpectedly is important for the issue of over personalization caused by the recommender ...
  • Sol-Gel synthesis of silica nanoparticles and their role in predicting cement mortar strength at early ages 
    Boukarroum, Rayyan Hamad (Notre Dame University-Louaize, 2020)
    Cement is one of the most fundamentally used material all over the world. Among the many different properties of cement, compressive strength conventionally determined at the age of 28 days remains the most important parameter to assess cement quality. Waiting for 28 days to obtain a test result urges cement manufacturers to set quality parameters higher than the minimum accepted by norms, which means higher unnecessary manufacturing costs. The aim of this study is to assess the performance of cement mortar when nano silica (Nano-SiO2) is used as supplementary cementitious material (SCMs) and ...
  • Synthesis and characterization of nanoparticles for potential applications in wound healing 
    Dib, Kevin (Notre Dame University-Louaize, 2020-10)
    In this work, Silver Nanoparticles (AgNPs) were synthesized in water using either polymer assisted chemical reduction synthesis method or green synthesis. The obtained AgNPs were characterized by Dynamic Light Scattering (DLS) and UV-visible spectroscopy (UV-vis), and further tested for antibacterial activity to evaluate their potential use in wound healing. At first polyvinylpyrrolidone (PVP 10 KD) and Low-Molecular Weight Chitosan were used as coating agents during the reduction of silver nitrate with a strong reducing agent sodium borohydride (NaBH4). Our DLS results demonstrated that ...
  • Synthesis and functionalization of d-PLL-PEG-FA coated gold nanoparticles for siRNA delivery in human prostate cancer 
    Minassian, Georges B. (2021)
    Herein, we describe, a simple method for the synthesis of dendrigraft poly-L-lysine (d-PLL) coated gold nanoparticles in water (AuNPs-d-PLL) as potential vehicles of siRNA delivery to prostate cancer cells, PC3-PSMA. AuNPs-d-PLL with diameters ranging between 50 ̶ 130 nm have been synthesized in aqueous solutions using d-PLL (7 KD) as a capping ligand and L-ascorbic acid as a reducing agent. The size of the resulting AuNPs was found to depend on several parameters, such as the concentrations of gold salt, reducing agent, and d-PLL. The obtained AuNPs-d-PLL were characterized using UV-visible ...
  • Synthesis, integrity, and biocompatibility of scFvD2B coated gold nanoparticles in human blood 
    Mitri, Nadim (Notre Dame University-Louaize, 2020)
    In this study, gold nanoparticles (AuNPs) were synthesized in water and characterized using ultraviolet-visible spectroscopy (UV-Vis), dynamic light scattering (DLS) and Zeta potential analysis. AuNPs were coated with thiol functionalized polyethylene glycol (PEG-SH) and scFvD2B (antibody fragment of D2B mAb) well known to recognize the extracellular epitope of the human prostate specific membrane antigen (hPSMA). In fact, scFvD2B binds PSMA and induces its endocytosis, thereby marking PSMA as a docking site for the delivery of therapeutic agents. AuNPs successful coating was confirmed by DLS ...
  • Task allocation in parallel and distributed computer system 
    Mina, Jean G. (Notre Dame University-Louaize, 1998-07)
    The allocation problem is known to be NP-Hard in the most general case where both the number of modules and the number of processors is arbitrary, and it is also Np-Complete in some of the restricted cases. Also, the general scheduling problem, where no restrictions are imposed on the interconnection structure between modules, on the modules processing time and on the number of parallel processors, is NP-Hard in the strong sense. Even under some restrictions, the scheduling problem is NP-Hard. In some other restricted cases, it is known to be NP-Complete. In this thesis, we first review fifty ...
  • Technology and the current covid-19 
    Simonian, Roy (Notre Dame University-Louaize, 2022)
    The world is witnessing nowadays a virus that spreads in a very fast manner and it has infected a large number of people. Countries rushed to find ways to stop this virus from spreading and to minimize the risks of getting infected. One of these ways was to integrate technology in people’s daily routine to help in containing the virus. In fact, although several countries took a lot of legal measurements and law enforcement to prevent the spread of the virus, such as wearing facial masks, social distancing, using sanitizers and other forms of hygiene supplements, there were always the need to ...

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