@article { author = {M., HASNAOUI}, title = {MODELING OF A PASSIVE SCALAR IN A TURBULENT FREE JET UNDER THE CORIOLIS EFFECT}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-11}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29845}, abstract = {ABSTRACTThe influence of Coriolis forces is studied in stationary and Sc = 1 (Schmidt number)cases on the tran sport of a passive scalar in a three-dimensional inhomogeneousturbulent free jet. The mean velocity field defines a small parameter U∞ (non-dimensionalwind-speed). This parameter governs the asymptotic expansion of the analysis.Using a linear spectral approach, two-point velocity-concentration correlationequations are obtained under some realistic simplifying assumptions. The solutiondepends on the non-uniform mean concentration gradient. Taking into account swirlcharacteristics, an expansion of the solution is constructed by means of analyticaltools, including the effects of several fundamental physical parameters. The meanconcentration gradient field possesses a privileged direction. As application of themodel, the spectral components of the solution are determined using furthersimplifying approximations. Graphical surfaces are drawn: these surfaces show thespecific characteristics of mixing in turbulent jets. The results are matched with otherresults obtained by means of numerical methods and experimental results.}, keywords = {Inhomogeneous turbulence,Coriolis forces,Linear spectral approach,Asymptotic analysis}, url = {https://icmep.journals.ekb.eg/article_29845.html}, eprint = {https://icmep.journals.ekb.eg/article_29845_4c1b3dccb769229ae7462164dba690e3.pdf} } @article { author = {E., SAYED-AHMED and M., KISHK}, title = {HEAT TRANSFER FOR HERSCHEL-BULKLEY FLUIDS IN THE ENTRANCE REGION OF A RECTANGULAR DUCT}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-15}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29846}, abstract = {ABSTRACTIn this study, we present a numerical solution for combined laminar fluid flow andheat transfer of Herschel-Bulkley non-Newtonian fluids in the entrance region of arectangular duct. The governing equations are solved iteratively by using finitedifference method to obtain temperature, bulk temperature, and Nusselt number. Twocases of the thermal boundary conditions are considered; (i) T thermal boundarycondition “constant temperature at the wall” and (ii) H2 thermal boundary condition“constant heat flux at the wall”. The results are presented in Tables and Figures fordifferent parameters for the fluid and the duct geometry.}, keywords = {Entrance Region flow,heat transfer,Non-Newtonian fluids,Numerical analysis,and Rectangular duct}, url = {https://icmep.journals.ekb.eg/article_29846.html}, eprint = {https://icmep.journals.ekb.eg/article_29846_7fcf6d5db670d58b4fca200c690a7b73.pdf} } @article { author = {M., SHOUCRI}, title = {MODELING THE PRESSURE-VOLUME RELATION IN THE VENTRICLES}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-12}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29847}, abstract = {ABSTRACTThe active force developed by the muscular fibres of the myocardium is representedas force per unit volume of the myocardium and included in the formalism describingthe pressure-volume relation (PVR) and the end-systolic pressure-volume relation(ESPVR) in the left or right ventricle. Experimental methods to measure or tocalculate the parameters describing PVR have often given inconsistent results. Theobjective of this study is to introduce some new mathematical relations describing theproperties of PVR. Verifications based on published experimental data are given.Suggestions for future experimental work are indicated. The lack of adequatemathematical formalism to verify the consistency of experimental data is the mainreason that prevents the application of PVR and ESPVR in routine clinical work.}, keywords = {Mechanics of ventricular contraction,clinical applications of pressure-volume relation,end-systolic pressure-volume relation,active force of the myocardium}, url = {https://icmep.journals.ekb.eg/article_29847.html}, eprint = {https://icmep.journals.ekb.eg/article_29847_674d1ba0469d0fea0421a0d53034ae02.pdf} } @article { author = {El-Hamouly, Hassan and Mabrouk, Gamal and Shabana, Haitham}, title = {Cryptanalysis of a cryptosystem based on chaotic Baker map}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-9}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29848}, abstract = {AbstractRecently, the idea of using chaos to design digital ciphers and analog securecommunication systems has provoked a great deal of research efforts since early 1990s.Meanwhile, security analysis of various proposed chaotic cryptosystems also attractsincreasing attention, and some chaotic cryptosystems have been found insecure. This paperdiscusses the security weaknesses of a proposed cryptographic algorithm with chaos at thephysical level. Some simple linear maps have a well known chaotic behavior in specificinterval. But when studding their long-time dynamics with computers, the result is differentfrom the true long-time chaotic dynamics, even in a high-precision floating-point arithmetic.This phenomenon will affect the security of a proposed cryptosystem for practicalimplementation with finite computing precision and for the use of the iteration number n asthe secret key. In addition, we present some possible improvements to the encryption schemeto obtain higher security.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29848.html}, eprint = {https://icmep.journals.ekb.eg/article_29848_0a45cb3a1c9a8848c338a1aebd23e35e.pdf} } @article { author = {Hassan, F.}, title = {Numerical Solution of Maxwell's Equations Two Time-Level Difference Scheme TTLD}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-8}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29849}, abstract = {Abstract:This paper deals with numerical approximations of electromagnetic phenomena, whichdescribed by Maxwell's equations,. A two time-level difference scheme (TTLD) is introducedfor solving Maxwell’s equation as wave equation; this is to reduce the large computationaland storage costs of Yee scheme. Convergence and stability conditions have been studied.The comparison with Yee scheme is presented.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29849.html}, eprint = {https://icmep.journals.ekb.eg/article_29849_d08b41364be89569fc09b37cf59a7c87.pdf} } @article { author = {Shoucri, M.}, title = {AN EULERIAN VLASOV CODE FOR THE NUMERICAL SIMULATION OF WAKE-FIELD ACCELERATION}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-12}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29850}, abstract = {ABSTRACTWe use an Eulerian Vlasov code for the numerical solution of the fully relativistic one-dimensional (1D) Vlasov-Maxwell equations, to study the generation of plasma wake fields by intense laser pulses. The very low noiselevel of the Vlasov code allows to study accurately the physics of the particles acceleration by the wake-field, inthe very low density of the phase-space.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29850.html}, eprint = {https://icmep.journals.ekb.eg/article_29850_d67dbfb2dbc224a93ca07db2c7a5c937.pdf} } @article { author = {Habib, H. and El-Zahar, E.}, title = {Parallel Initial-Value Algorithm for Quasilinear Shock Problems with Turning Points}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-12}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29852}, abstract = {AbstractIn this paper, a parallel initial value algorithm is presented for quasilinear stationary shock problemswith turning points exhibiting two-boundary layers or an internal layer. The method is based onobtaining two independent asymptotically equivalent first-order singularly-perturbed initial-valueproblems (SPIVPs) of the original problem. The error is estimated to be of orderε . The two SPIVPsare modified to obtain two boundary-layer correction problems. These non-stiff initial-value problemsare solved simultaneously in parallel process using (RKV45) non-stiff code integrator. The obtainedsolutions are combined to approximate the solution of the original problem. Numerical experimentsindicate the high accuracy and the efficiency of the method. Furthermore, the accuracy of numerical resultsimproves as the small parameter ε tends to zero}, keywords = {quasilinear singular perturbation problems,turning points problems,two boundary layer,internal layer,Initial value methods, parallel algorithms}, url = {https://icmep.journals.ekb.eg/article_29852.html}, eprint = {https://icmep.journals.ekb.eg/article_29852_162fa2603d1ca8d52b61b838970e104d.pdf} } @article { author = {N., ZAKI and T., ABOU El-DAHAB}, title = {APPLICATION OF CLIFFORD ALGEBRA TO KINEMATICS OF GUIDED MISSILES}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-12}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29886}, abstract = {ABSTRACTOne of the main issues within aerospace and robotics applications is the Kinematics equations ofguided missiles. Investigation and analysis of these equations in both homing and command guidancesystems consider the missile as an immaterial/massless point moving with a known velocity. Inaddition, the nature of applications necessitates this process to be fast in computations and easy orconcise in manipulation. Therefore, the objective is to reformulate these equations using the propertiesand the geometrical significance of Clifford algebra. This formulation may be easier and more obviousthan the other traditional methods as it unites vectors of different planes into a single mathematicalsystem with a comprehensive geometric significance.}, keywords = {Kinematics equations,Ideal bonds,Clifford algebra and Projection}, url = {https://icmep.journals.ekb.eg/article_29886.html}, eprint = {https://icmep.journals.ekb.eg/article_29886_883a6cff01c4fe23e4f03e77fd76c038.pdf} } @article { author = {Maneea, Marwa and Abd El- Monem, Reda and Attia, Gamal}, title = {TWO-GRID ITERATION METHOD FOR SOLVING MULTIVARIABLE INTEGRAL EQUATIONS ON POLYGONAL REGIONS}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-7}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29887}, abstract = {ABSTRACTThe Nyström method for solving integral equations on polygonal regions reduces to thesolution of a finite system of linear equations. The size of this system can easily very large,prohibitively so for solution by direct methods, and this necessitates the use of iterativemethods. In this paper two-grid iterative method is applied for fast solution of these largesystems.}, keywords = {integral equations,Nyström methods,Iterative techniques}, url = {https://icmep.journals.ekb.eg/article_29887.html}, eprint = {https://icmep.journals.ekb.eg/article_29887_e39324f3670fc673b90c5bb8d38da2ce.pdf} } @article { author = {Maneea, Marwa and Abd El- Monem, Reda and Attia, Gamal}, title = {SOLVING INTEGRAL EQUATIONS ON GENERAL REGIONS}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-9}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29888}, abstract = {BSTRACTThere exist many numerical methods for solving the integral equations, but most of thesemethods deal with integration over rectangular or triangular regions. This technique ismodified to approximate the integral equation over general regions either on two or threedimensions supported by some numerical examples.}, keywords = {Numerical integration,quadratic interpolation,integral equations}, url = {https://icmep.journals.ekb.eg/article_29888.html}, eprint = {https://icmep.journals.ekb.eg/article_29888_ac4edd6a9e2dfdf8fda520b5190536db.pdf} } @article { author = {SHAARAWY, OSAMA and ROSHDY, ELIWA and SOROUR, EL-SAYED}, title = {ATM NETWORKS CONGESTION CONTROL OPTIMIZATION USING STOCHASTIC PROGRAMMING}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-10}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29889}, abstract = {ABSTRACT.The Asynchronous Transfer Mode (ATM) is a major transport technology to support theBroadband Integrated Services Digital Networks (B-ISDN). It supports variety of networkservices such as World Wide Web, videoconference, e-commerce, network multimedia,traditional file transfer protocol (ftp), email, newsgroup and etc. Many network applicationsnot only ask for high speed, broadband, but also require high quality of services (QoS). Moreand more research works are focused on ATM networks. A number of researchers havedemonstrated the virtual path concept. The advantage of this concept is that it allows a largegroup of virtual circuits to be handled and switched together, resulting in a lower computingcomplexity, faster processing speed, and an efficient use of network resources. The ATMnetwork provides multiple services, a significant amount of traffic flows have stochasticcharacteristics; that makes it difficult to solve congestion control problem.Stochastic programming (SP) is introduced to solve the essential problems of ATM networkcongestion control, Scenario Tracking (ST) approach of stochastic programming employedfor ATM network optimization. Three optimization models: Capacity Assignment (CA),Capacity and Flow Assignment (CFA), and Flow Assignment (FA) are discussed; a proposedvirtual path based CFA model is then simulated.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29889.html}, eprint = {https://icmep.journals.ekb.eg/article_29889_5eee32214ae06c1f523a865c1c5f235a.pdf} } @article { author = {E., M. and Salama, A.}, title = {Optimization Model By Fuzzy Environment}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-13}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29890}, abstract = {AbstractA well known linear programming model and its equivalent model are introduced as ahandling type of Fuzzy optimal problem. Linear programming (LP) with Crisp objectivefunction and crisp constraints is modified and presented to be Fuzzy linear programming(FLP) with Fuzzy objective function and Fuzzy constraints (Zimmermann 1983, Wemers1984).For each value ri of the objective function r = cTx, ro < ri < r1, the membership r C~μof theconstraints obtained by the min-max method and the membership r G~μof the objectivefunction are to be found. The Fuzzy set { ri, r G~μ. r C~μ} implies the optimal value ri whichsatisfies the equality approach r G~μ= r C~μ, or the product approach : imax{ r G~μ. r C~μ}.}, keywords = {Fuzzy optimization,Min-max,Membership Function,fuzzy decision making,fuzzy linear programming}, url = {https://icmep.journals.ekb.eg/article_29890.html}, eprint = {https://icmep.journals.ekb.eg/article_29890_74cb6dbeae8b5b489fa63e194d60e2a8.pdf} } @article { author = {M., MEZGHANI and T., LOUKIL and A., DAMMAK}, title = {A GENERAL GOAL PROGRAMMING MODEL FOR SOLVING AGGREGATE PRODUCTION PLANNING PROBLEMS WITH IMPRECISE GOALS}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-10}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29891}, abstract = {ABSTRACTGenerally we assume that the decision-maker is able to give with precision and withoutdifficulty, the values of the goals associated with the objectives of a decision-makingsituation. However, such values may be imprecise in nature. In the present paper, a generalgoal programming (GP) model was proposed to solve the aggregate production planning(APP) problem in an imprecise environment with multiple objectives. The goals andtechnological parameters are imprecise and expressed through intervals. The concept ofsatisfaction functions is used to integrate explicitly the decision maker‘s (DM) preferences.}, keywords = {Aggregate production planning,Goal Programming,Satisfaction Functions,Imprecise goals and parameters}, url = {https://icmep.journals.ekb.eg/article_29891.html}, eprint = {https://icmep.journals.ekb.eg/article_29891_610acfc3ad40eb3cca5f9c601832c5db.pdf} } @article { author = {Ayed, Atef and Sorour, Elsayed and Istafanos, ADLY and Ibrahim, Fawzi}, title = {An Optimization Approach for Aircraft Sparing}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-8}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29892}, abstract = {AbstractThe objective of this paper is to establish an optimum recommended spare list of aircraftcomponents. The criteria of selecting a spare item for purchase are based on its ability toimprove the aircraft operational availability. Marginal analysis is used to sort the spares suchthat optimum budget utilization is achieved. A mathematical model for aircraft operationalavailability is derived through the analysis of a typical aircraft operation and maintenanceconcept. A complex queuing network of aircraft operation and maintenance is simplified tohelp in deriving the mathematical model for aircraft operational availability. This approach isdeveloped to support the decision making process during the provisioning of aircraft spares. Atypical example and its result analysis are given. Also, a complete user-friendly package isdeveloped and implemented using Visual Basic 6.}, keywords = {Aircraft,operational availability,spares,spare list,components,operation and maintenance,optimum budget and mathematical model}, url = {https://icmep.journals.ekb.eg/article_29892.html}, eprint = {https://icmep.journals.ekb.eg/article_29892_fc29b909b9bc8a4b2db3bc4466d00b27.pdf} } @article { author = {Habbk, Galal and Soliman, Mona and El Begawy, Mahmoud and Hammouda, Farouk}, title = {Effect of Light Emitting Diode Therapy (LEDT) on Wound Healing}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-18}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29893}, abstract = {ABSTRACTObjective: The aim of this study aimed to asses the effects of Light Emitting Diode Therapy(LEDT) on wound healing in rats using different wavelengths of LEDs: 680, 730, 950 nmsimultaneously.Background Data: Light Emitting Diode Therapy (LEDT) developed from Sim-Med Ltd;using GaAs semiconductor as the diode for delivering light deep into tissues to promote woundhealing and tissue growth. We review in this paper and present our data of LED treatment forwound healing to rats.Material and Methods: To perform this study we used variety of wavelengths, power density,and energy density parameters for each wound in 2groups of rats (104 rats), also we used lensto maximize the power and reduce the exposure time in the second experiment.Results: we found that LED with three wavelengths (680, 730, 950 nanometer) increase woundhealing process in rats in first experiment more than second experiment which used lens tomaximize the power. Conclusion: The results of the study demonstrated that the LED with three wavelengths (680,730, 950 nanometer) simultaneously with contact control increase the wound healing of the rats.The results also showed that LED has large spot size than the laser so LED is more suitablethan laser for large wounds, moreover the combined wavelengths of laser optimal for woundhealing cannot be efficiently produced, and the size of wounds which may be treated by lasersis limited.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29893.html}, eprint = {https://icmep.journals.ekb.eg/article_29893_4e69dc8feeb27aae539dcaa6c5091906.pdf} } @article { author = {El- Desoky, A. and Abou El-Soud, A. and El-Nadi, A.}, title = {A TWO-DIMENSIONAL MODEL OF A LASER-METAL INTERACTION}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-14}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29894}, abstract = {ABSTRACTA two-dimensional cylindrical axisymetrical model for laser-metal interaction is presented inthis paper by taking into account the reflection of the laser beam at the surface of the target,the initial and boundary condition, using the continuous and pulsed Gaussian Nd:YAG laserbeam. The problem was solved using finite difference method and using Newton Raphsonmethod to calculate the position of the interface, the metals were studied are pure aluminum,magnesium and titanium. The model allows both for heat conduction and melting inside thetarget. The computational results are temperature fields in both solid and liquid were obtainedwhich provide useful information to practical laser treatment processing.}, keywords = {metal,temperature field,Nd:YAG laser,two-dimensions,finite difference}, url = {https://icmep.journals.ekb.eg/article_29894.html}, eprint = {https://icmep.journals.ekb.eg/article_29894_280abcc41366d2de38b2d65ad25f3d69.pdf} } @article { author = {Hashem, Mohamed and Hammouda, Farouk. and Korraa, Soheir}, title = {Nanoparticles Photosensitization in Sebaceous Gland}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-15}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29895}, abstract = {AِbstractAim of Study: Current topical and most oral therapies for sebaceous glands have limitedefficacy because drugs active constituents do not reach the sebaceous gland efficiently. Mostrecently it has been shown laser-induced flow in nanoscale cavities could represent asuccessful mechanism low level laser therapy.Aim of the work: The aim of the present study is to investigate, whether a coordinatecombination betweeen laser therapy and methylene blue delivered by liposomes or gel can beeffective in destructing sebaceous glandsMaterials and Methods: Gel or liposome preparations of Methylene blue were topicallyapplied on mice skin. After being absorbed into skin methylene blue was exposed to differentfluencies of He:Ne laser and skin biopsies were obtained and examined histiologically.Results: Liposome delivery system showed significantly increased diffusion of methyleneblue into the pilosebaceous unit and deeper skin layers compared to gel delivered methyleneblue. It was evident that destruction of the pilosebaceous unit depends on laser parameters andthe on lag time between laser application and biopsy sampling.Conclusion: Temporal coordination between low level laser treatment and liposomedelivered methylene blue drug system maximizes drug effects and minimizes possible adverseeffects. Irradiation should start when the drug concentration has reached its maximum in thedesired field of action}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29895.html}, eprint = {https://icmep.journals.ekb.eg/article_29895_c2361e0fdd3d33fd73fdd7fe37061872.pdf} } @article { author = {Abdel Salam, Ekram and El Shinawy, Rabha and Korraa, Soheir and Abdel Meguid, Iman and El Sharnouby, Gihan}, title = {Ameliorative Effects of He:Ne Laser Irradiation on DNA Damage of Blood of Children with Acyanotic Heart Disease}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-13}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29896}, abstract = {AbstractLow-energy laser irradiation (LELI) has been found to attenuate various biologicalprocesses in tissue culture and experimental animal models. The aim of the present study wasto investigate the role of LELI in ameliorating markers of oxidative stress (in terms of bloodantioxidant enzymes levels, NO generation, apoptotic genes together with DNAfragmentation and apoptosis percentage in circulating lymphocytes) in cyanotic and acyanoticcongenital heart diseases with reference to normal healthy children. Accordingly, wholeblood from 16 cyanotic, 14 acyanotic and 15 controls was exposed to 8 mW He-Ne laser atenergy densities of 3 J/ cm2 and examined before, after and without laser exposure 24 hourspost irradiation for levels blood antioxidant enzymes, NO generation, Bax RNA and Bcl2protein together with DNA fragmentation and apoptosis percentage in circulatinglymphocytes. Results indicated that there were significant increases in mean ± SD of plasmanitrite, MDA, DNA fragmentation and apoptosis in circulating lymphocytes of both acyanoticand cyanotic cases compared to controls before laser irradiation. Laser ameliorated oxidativestress in acyanotic heart disease blood, but increased apoptosis and DNA fragmentation incyanotic cases 24 hours post laser irradiation. In control cases laser had a biostimulatoryeffect exhibited by decreased lipid peroxidation, apoptosis and DNA fragmentationcompared to its level without laser irradiatioin. Also, there was significant increase in plasma  nitrite in controls, cyanotic and acyanotic cases 24 hours post irradiation with laser compared to their level without laser irradiation. However, cyanotic cases showed the highestsignificant value and were significantly higher when compared to both cyanotic and acyanoticcases. It is concluded that He:Ne laser have an ameliorative effect on damaging effectsinduced due cardiac catheterization procedure in case of acyanotic congenital heart diseases,but it worsen the effects in cyanotic congenital heart diseases. Increased nitric oxideproduction seems to be the reason for the increased oxidative stress in cyanotic heart diseases,which are worsened when exposed to laser irradiation.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29896.html}, eprint = {https://icmep.journals.ekb.eg/article_29896_5949752624b65bfd1cce4ad2c9182afc.pdf} } @article { author = {Darwish, M. and El Sherif, Ashraf and El Ghandoor, Hatem}, title = {Application of Gabbor Hologram for Designing a New 0BOptical Imaging System}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-11}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29897}, abstract = {AbstractSince most optical imaging system depends on tracking surface detail, a key discovery was that mostmodern laminated work surfaces are microscopically embossed, presumably to reduce glare. When thistexture is obliquely illuminated by a light source a pattern of highlights and shadows (speckle pattern)is revealed. The performance of the optical imaging systems with different diffuse has been studied. Itis important for accurate study to know the characteristics of these surfaces produced by Gabborholography technique.Single-exposure Gabbor holograms using different types of light sources (i.e. He-Ne laser, diode laser,various color LEDs), diffusers, and holographic plates is presented. Circular interference fringes fromsingle-exposure Gabbor hologram were recorded.Relations between the squared radii of the fringes and their interference order for each light sourcewere presented to calculate the wavelengths of diode laser, various color LEDs,. The measuredwavelengths were found to be in good agreement with the real one. So, we can differentiate betweenall of these diffusers for designing a new optical imaging system based on the laser speckle pattern.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29897.html}, eprint = {https://icmep.journals.ekb.eg/article_29897_e55f66c8603f572acf19ad19e7830576.pdf} } @article { author = {EL-Sherif, Ashraf. and Hassan, Mahmoud and Mokhtar, Ayman and Samy, Ahmed}, title = {Characterization of a 808 nm High power Diode Laser module}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-10}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29898}, abstract = {AbstractA complete characterization for the diode laser module operating at 808 nm is required for differentapplications; such as developing an efficient Nd3+ doped solid state laser, industrial and medicalapplications. In this paper a complete characterization for a high power diode laser module with fiberpigtail is presented. Up to 6.6 Watt output optical power was measured. The electrical characterizationof the diode laser module was examined by measuring the dependence of the laser driving current onthe operating voltage. The optical characterization was investigated at different temperatures; theseincluded the laser output power versus the driving current, the output optical power versus electricalinput power and the laser output spectrum. The measured diode laser parameters at 25oC were (1.3A)threshold current, (42%) overall slope efficiency and (807.96nm) central wavelength with line width of(3.59nm) at FWHM. The variation of the above mentioned parameters with temperature are presented.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29898.html}, eprint = {https://icmep.journals.ekb.eg/article_29898_11fd1e8d4b02cb774d6101031d41e188.pdf} } @article { author = {Samy, Ahmed. and El-Sherif, Ashraf. and Mokhtar, Ayman. and Hassan, Mahmoud.}, title = {Simulation and Analysis of a High Power Diode-End-Pumped Nd:YVO4 Solid- State Laser}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-11}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29899}, abstract = {AbstractNd:YVO4 is widely and commercially available laser material for diode-pumped lasers. Comparedto Nd:YAG, Nd:YVO4 has a larger stimulated emission cross-section, larger absorption coefficient andbroader absorption bandwidth. It has lower threshold and its output power is less sensitive to thedrifting of the diode pump wavelength. In this paper a Nd:YVO4 crystal at 1064nm pumped with a highpower diode laser at 808nm is modeled and simulated using LasCAD software tool package. Thesemodels investigate the optimum cavity design parameters (length of the cavity, output couplerreflectivity, the beam overlap key parameter and crystal dimensions). The geometry of the cavity isoptimized to produce maximum TEM00 laser output, taking into consideration the thermal gradient onthe rod structure. The cavity optimum configuration neglecting the insignificant effect of changing rodlength was; 66mm in length, 90% of output coupler reflectivity. The pumping beam spot size affectson the laser output and the final optical conversion efficiency. Controlling the pumped spot size ( ) tobe equal the mode spot size ( ) the maximum beam overlap efficiency and consequently themaximum optical slope efficiency with the highest laser output were achieved. The Nd:YVO4 Crystalwith dimension of (1-3mm) diameter and (7-10mm) length with 1% doping concentration (1at.%) isthe suitable choice for the DEPSS (Diode End Pumped Solid State ) laser configuration. A final opticalconversion efficiency of 52% and a maximum slope efficiency of 54% were obtained. These resultscan be improved by rescaling the transfer efficiency to become around 90%.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29899.html}, eprint = {https://icmep.journals.ekb.eg/article_29899_fee89df5034baa7da2d5163fc77f08be.pdf} } @article { author = {Guerrero, Raphael}, title = {DEVELOPMENTS IN ELASTOMERIC OPTICS 10BAT ATENEO DE MANILA UNIVERSITY}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-8}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29900}, abstract = {}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29900.html}, eprint = {https://icmep.journals.ekb.eg/article_29900_67b3e26660652665e24e744f5ccc62e1.pdf} } @article { author = {Hamouda, Farouk and Sief, Sayed}, title = {Light Sources and its Medical Applications}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-1}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29901}, abstract = {AbstractNowadays, Light Emitting Diodes (LEDs) are fast becoming the light source of choice for medical application.LED therapy has been performed to investigate the influence of LEDT on the healing process of wounds or lesions.The researchers reported that light therapy as LEDT has a biostimulative effect and greatly enhance the naturalwound healing process.This will save valuable time and resources for both patients and health care facilities. Furthermore, improvedwound healing will reduce the risk of infection for the patient, decrease the amount of costly dressings required,and more quickly return the patient to a preinjury/ illness level of activity; also laser light has been widelyacclaimed to speed wound healing of ischemic, hypoxic, and infected wounds. LEDs provide low energystimulation of tissues that result in increased cellular activity during wound healing; these activities includecollagen production and angiogenesis.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29901.html}, eprint = {https://icmep.journals.ekb.eg/article_29901_38ec4df6f6f58daa89e062734d8b6a8f.pdf} } @article { author = {El-Sherif, Ashraf and El-Sharkawy, Yasser and Yehia, Ramy}, title = {Optical Coherence Tomography}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-1}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29902}, abstract = {AbstractFourier Domain optical Coherence Tomography (FD-OCT) is used to obtain subsurface cross-sectional imageswith micron level resolution by analyzing the interference pattern created by the mixing of light in a MichelsonInterferometer FD-OCT systems are able to obtain a direct measurement of the scattering amplitude along avertical axis within a bulk sample. One exposure provides the complete scattering profile from the surface intothe bulk of the sample; this measurement is commonly referred to as an A-scan. Fourier Domain opticalCoherence Tomography (FD-OCT) achieves greater sensitivity and higher imaging speed than time domain OCTand has become a powerful tool for biomedical and material application}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29902.html}, eprint = {https://icmep.journals.ekb.eg/article_29902_8eaa644e62cc03831ec950b551a4a103.pdf} } @article { author = {El Ghandoor, H.}, title = {Measurement of Glucose Nanoparticles Concentration in Plasma and Blood accurately using Laser Sheet Interferometry}, journal = {The International Conference on Mathematics and Engineering Physics}, volume = {4}, number = {International Conference on Mathematics and Engineering Physics (ICMEP-4)}, pages = {1-1}, year = {2008}, publisher = {Military Technical College}, issn = {2636-431X}, eissn = {2636-4328}, doi = {10.21608/icmep.2008.29903}, abstract = {AbstractOne of the major diseases in Egypt and the rest of the world is diabetes. In diabetic patients the synthesis andmetabolism of glucose is abnormal that leads to abnormal blood glucose levels in the body tissues. Diabeticpatients suffer form many acute and chronic symptoms and diseases. They are at high risk of heard disease,blindness, and reduced blood circulation in extremities often leading to ulcers, gangrenes and limb imputations.It is vital for diabetic patients to monitor blood glucose levels and take medication t control the glucose level intheir body.In this paper, a new technique developed by H.El Ghandoor, called the laser sheet method, will be applied tomeasure the optical properties of nanoparticles in blood plasma and blood. The technique involves relating themolar reflectivity of plasma to the glucose concentration. Comparing the measurement to the standard clinicalmethod will do validation of the measurement. Many types of glucose meters are commercially available. Glucose meters are a 3 billion dollar businessworldwide. We would like to investigate a new technique for measuring the glucose level in the blood usinglaser refraction technique. If the technique works it will be the basis for a new instrument the Laser InterferenceGlucometery (LIG). We plan to originally measure blood glucose in the blood serum. If this is successful weplan to try the measurement on whole blood and possibly develop a non-invasive method for measuring theglucose level. The use of laser interference to determine the blood constituents may prove to be a very sensitivetechnique to determine blood and other biological fluid constituents. This laser interference technique mightbecome an important accurate medical diagnostic tool in the future.}, keywords = {}, url = {https://icmep.journals.ekb.eg/article_29903.html}, eprint = {https://icmep.journals.ekb.eg/article_29903_98bfd0acb85ebce00d2da49b3d58ca1c.pdf} }