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FACULTY OF NATURAL & APPLIED SCIENCES

FACULTY OF NATURAL & APPLIED SCIENCES

Recent Submissions

  • Al Hassanieh, Joelle (Notre Dame University-Louaize, 2022)
    Humans are exposed to a notable variety of toxicants including lead as a heavy metal resulting from occupations and through environmental accumulation as in the Lebanese coastal and freshwaters. It is well established that lead exposure in the workplace contributes to worker infertility and decreased reproductive efficiency. Several reports have reported the detrimental impact toxic effects on human male reproduction by subsiding libido, spermatogenesis, semen quality, hormonal production and regulation, and much more. The objectives of this study were to inspect the effects of ...
  • Chmeit, Nader (Notre Dame University-Louaize, 2012-07)
    The scheduling problem is one of the most challenging problems faced in many different areas of everyday life. This problem can be formulated as a combinatorial optimization problem, and it has been solved with various methods using heuristics and intelligent algorithms. We present in this research an efficient solution to the scheduling problem using two different heuristics namely Simulated Annealing and Ant Colony Optimization. A study comparing the performances of both solutions is described and the results are analyzed.
  • Ezzeddine, Rana (Notre Dame University-Louaize, 2012-09)
    It is important to understand stellar evolution as well as the chemical composition and structure of the Galactic disk, in which B stars in open clusters play a major role as they are of the most massive and brightest objects in these clusters. The fundamental atmospheric parameters (Teff, log g) of the B stars in the Alpha Persei open cluster (190pc, 50Myrs) have been determined using the Stromgren uvby-β photometric system, with a calibration technique by Napiwotzki et al. (1993)[65]. The method is based on fitting spectral lines of fundamental stars to synthetic spectra based on Kurucz ...
  • Hajje, Thilda (Notre Dame University-Louaize, 2022)
    Vaccination is a preventive measure to reduce death and morbidity against infectious diseases, and has been applied effectively against most of the viral and bacterial infections around the world. Targeted campaigns against children diseases have been very effective in drastically reducing such diseases thanks to national immunization programs in both developed and developing countries. However, many individuals including parents of various ages are still reluctant to commit to vaccination and some recent fears have been increasing when it comes to vaccination more recently, especially due to ...
  • Sfeir, Elias (Notre Dame University-Louaize, 2012)
    Delay-Tolerant Networks (DTNs) are a type of emerging networks characterized by very long delay paths, frequent network partitions and high loss rates. The nodes are sparsely deployed and intermittently connected. The presenting network is used in a variety of environments including military, disaster situations and for long distance communications. Although it is used in critical sectors, the communication support lacks the high end technology usually found in important networks. The nodes participating in this network do not have stable end-to-end connections. They can communicate to each other ...
  • 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 ...
  • Saliba, Elie Fayez (Notre Dame University-Louaize, 2015-07-09)
    In this work we discuss a special kind of stochastic processesX=〖{X_t}〗_(〖t∈R〗_(≥0) ) that are of exceptional interest from both the theoretical ad the applied points of view. These processes are called Affine Processes, and are characterized by the fact that their characteristic function has the form of an exponential of an affine function, i.e. by 〖∅^x〗_X (u) |_t=E^x [e^(<X_(t ),u>) ]=e^(Φ(t,u)+<x,Ψ(t,u)>), Where the exponent Φ(t,u)+ <x,Ψ(t,u)> Is an affine function of its initial state x in the state-space E=〖R^m〗_(≥0)×R^n. The above expectation E^x is the expectation which respect to the ...
  • El Haddad, Anthony (Notre Dame University-Louaize, 2022-07)
    With the considerable rise of Internet users and the massive and diverse web searches, an excess of data has become available online. A recommendation model, also known as an engine, handles this massive amount of data available to find patterns that reflect user behaviors. Recommendation models have been implemented in several industries, and the most popular implementation is in the entertainment industry, specifically video streaming and on-demand platforms. There are several types of recommendation systems. In this paper, we have proposed a way to escape the loop created by the recommendation ...
  • Koliana, Rita (2022)
    Green synthesis of metallic nanoparticles has accumulated an ultimate interest over the last decade due to their distinctive properties that make them applicable in various fields of science and technology. Metal nanoparticles that are synthesized by using plants have emerged as nontoxic and ecofriendly. In the current study, the optimal reaction condition for the synthesis of zero valent iron nanoparticles using Malva extract was developed. For the first time, aqueous extract of Malva parviflora was used as a sustainable source of reducing and capping agents to synthesize zero valent iron ...
  • Eid, Maria George (Notre Dame University-Louaize, 2022-05)
    There is no doubt that animation is becoming one of the biggest advertising trends and approaches in modern times. No need to wonder why! Simply put, animated advertisement gives us a video that is promotional and entertaining at the same time; leaving the consumer captured by the visuals and animation. With the relevance of animated advertisement in today’s world, this thesis aims to provide a comparative overview of animated vs non-animated advertising. The thesis shall study the “Soul Drops” animated commercial starting from scratch, to the procedures carried on until reaching the result.
  • El Hayek Bou Mansour, Michella (Notre Dame University-Louaize, 2021-12)
    Abrupt work schedules, such as nightshifts, are prevalent nowadays and are known to cause circadian misalignment and sleep disruption which can have adverse health consequences. Among the well documented pathologies among night workers are cardiometabolic impairments, the effects of which appear to be more disruptive in older adults due to their poorer adaptation to night work schedules. The physiological mechanisms by which night shift work and sleep disruption contribute to increased cardiovascular disease (CVD) risk are poorly understood. Furthermore, the potential role of specific CVD ...
  • Shaabo, Layal (Notre Dame University-Louaize, 2022-05)
    Chronic sleep restriction (CSR) has been implicated in higher risk of insulin resistance (IR) and immune-metabolic dysfunction. No studies investigated the effect of CSR on macrophage differentiation in vWAT in relation to leptin synthesis and glucose homeostasis. Therefore, this study aimed at assessing blood glucose levels and vWAT expression of leptin, CD38, and CD163 following CSR. Adult male C57BL/6 mice were housed under 12:12 L/D cycle (lights on at 0700 hrs) with free access to food. Following a two-week acclimatization period, animals were divided into 2 groups: 1) control (C, N=8) ...
  • Mahfouz, Etienne (Notre Dame University-Louaize, 2013)
    We need the following definitions: An integral domain is a commutative unitary ring with no zero divisors. A principal ideal domain (PID) is an integral domain in which every ideal can be generated by one element. A unique factorization domain (UFD) is an integral domain in which factorization of integers into primes is unique. (more details later). An integral domain R is said to be a Euclidean ring if for every a≠0 in R there is a defined integer d(a) such that: For all a,b € R, both non zero, d(a) ≤d(ab). For all a,b € R, both non zero, there exists t,r € R such that a=tb+r where either r=0 ...
  • Younes, Ceaser (Notre Dame University-Louaize, 2014)
    Web services are form of middleware to exchange information between systems over a network. With the advent of the age of mobile devices and their diversity, the importance of web services became all the more apparent. Every web service grants certain functionality and can utilize other web services to gain more functionality and more robustness. Such a service that combines the functionality of other services is called a composite service and the process of designing such a service is called a composition. This thesis studies an on-the-fly algorithm that efficiently checks for the possibility ...
  • Semaan, Georgio (Notre Dame University-Louaize, 2021-05)
    In recent times, a new technology – Blockchain was brought forward to the global society. The world is using the term ‘Blockchain technology’ to signify diverse things such as the Bitcoin Blockchain, virtual currencies like Cardano and XRP, and smart contracts. Blockchain-based applications are springing up, covering several fields comprising financial services, reputation system and Internet of Things (IoT), and so on. Generally, Blockchain is implicit to be distributed ledgers that is a list of transactions verified and stored into blocks and shared among a number of computer nodes in a ...
  • Tohme, Celine (Notre Dame University-Louaize, 2016)
    Several studies have shown a link between pesticide exposure and neurological problems. In the present study, we show the effect of twenty common pesticides (dieldrin, rotenone, endosulfan, penconazole, trifiuralin, dicofol, chloropropham, hexachlorobenzene, thiamethoxam, dimethoate, maneb, p,p' -DDE, paraquat, permethrin, chlorfenapyr, propanil, kresoxim-methyl, boscalid, triadimefon, lambda-cyhalothrin) on myelin gene expression (PLP and MBP) in oligodendrocytes. We first studied the toxicology of each chemical to determine the doses to consider by calculating the ration of dead to living ...
  • Haddad, Mireille J. (Notre Dame University-Louaize, 2017)
    Maintenance is the most costly phase of the software life cycle. The maintenance cost of a program is estimated to be over 80% of its total life cycle costs (Erlikh, 2000). Since most of the maintenance time is devoted to understanding the program itself, program comprehension becomes essential. Often, a large fraction of the maintenance time is spent on reading code to understand what functionality of the program it implements. An insufficiently documented source code can be challenging for developers to understand and maintain. A clear and concise documentation can help developers ...
  • Yoghourdjian, Vahan Artine (Notre Dame University-Louaize, 2013-06)
    In the world of computing, one major statement has always been true: the request for computing power is always greater than the available resources. For this reason, scientists and researchers started considering the concept of sharing resources. In the last decade, the world of computing has seen a big leap forward with the emergence of cloud computing. In this new paradigm, computing resources of data centers spread all over the world can be shared to provide increased power and availability to users. However, with this increase in computing power came along an exponential increase in energy ...
  • Rammouz, Veronica (Notre Dame University-Louaize, 2021)
    The internet has made room for lots of unwanted activity to propagate through computers. In response, many methods were established to detect a certain computer executable as malicious. However, there were still loopholes for hackers within traditional systems. Some methods use machine learning others use deep learning. There are some drawbacks to each method, such as reverse analysis and restricted simulation on different execution paths, as well as long execution time. Some methods cannot generalize well and cannot scale to large amounts of data. Moreover, anti-viruses, using signature-based ...
  • Salem, Elie (Notre Dame University-Louaize, 2006)
    A denial of service (DoS) attack is an attempt by a person or a group of persons to cripple an online service. This can have serious consequences on companies like Amazon and eBay, which rely on their online availability to do business. Many defense mechanisms have been proposed to thwart DoS attacks. One of these defense mechanisms is called hop-count filtering. Although an attacker can forge any field in the IP header, he or she cannot falsify the number of hops an IP packet takes to reach its destination. This hop-count information can be inferred from the time-to-live value in the IP header. ...

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