Papers by roshdy abdelrassoul
This paper presents a DNA based classification technique. It exploits the properties of the DNA a... more This paper presents a DNA based classification technique. It exploits the properties of the DNA as a quaternary logic with the advantages of better storage, better accuracy, and shorter time compared to binary logic. Several examples are employed to demonstrate using the DNA as a new classification method for differentiation between closely related objects such as boys and girls also we used neural network to demonstrate better accuracy and predict some objects for example boys. In addition the explanation of DNA computing, Boolean Circuit using DNA, Molecular Beacons, also DNA logic gates and some applications using DNA computing. Several programming tools are used to illustrate that using the MATLAB program.
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Heat exchanger system is widely used in chemical process industries, including petroleum refining... more Heat exchanger system is widely used in chemical process industries, including petroleum refining and petrochemical processing, especially in the hazard zones because its convert the fluid from high range of temperature and pressure from the storage tanks to the pipe lines. A heat exchanger consists of two main modules, the first module is mechanical (vessel, shell, tube) It happens inside heat transfer, the second module is the controller circuit which controls the mechanical module by opening and closing the valves according to the set point temperature. This paper will focus on improving the performance of control circuits which is used in the heat exchanger. Genetic controller will replace the PID and the Fuzzy controller to obtain the best solution. As a consequence, the overshoot ratio and the settling time is reduced to 0.03 % and 110 seconds respectively.
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In recent years, a radical increase of photovoltaic (PV) power generators installation took place... more In recent years, a radical increase of photovoltaic (PV) power generators installation took place because of increased efficiency of solar cells, as well as the growth of manufacturing technology of solar panels. This paper shows the operation and modeling of photovoltaic systems, particularly designing neural controller to control the system. Neural controller is optimized using particle swarm optimization (PSO) leads to getting the best performance of the designed PV system. Using neural network the maximum overshoot and rise time obtained become 0.00001% and 0.1798 seconds, respectively also this paper introduce a comparison between some kind of controller for PV system. In recent years, a radical increase of photovoltaic (PV) power generators installation took place because of increased efficiency of solar cells, as well as the growth of manufacturing technology of solar panels. This paper shows the operation and modeling of photovoltaic systems, particularly designing neural ...
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Results in Physics
Abstract Free space optics (FSO) provides high data rate by allowing transmission of signal throu... more Abstract Free space optics (FSO) provides high data rate by allowing transmission of signal through atmosphere. FSO is affected by different weather conditions. The atmospheric attenuation is caused by two main factors; absorption and scattering. Fog, rain, snow and cloud cause the scattering of optical signals transmitted in free space. Fog is the most critical attenuating factor. In this paper, a new idea to overcome the atmospheric attenuation is discussed using adaptive transmitter and receiver design based on the transmitted power equation that depends on the weather conditions. The obtained results show a huge performance enhancement in the signal to noise ratio (SNR) and bit error rate (BER).
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As is well known noise figure plays an important role for many applications, so this paper will i... more As is well known noise figure plays an important role for many applications, so this paper will introduce a noise model for heterojunction transistors new technique for prediction. A presented neural network model with cascade feed-forward training algorithm has been connected to foresee heterojunction microwave transistor noise parameters then applying the new technique to get the higher accuracy for noise parameters using DNA computing. This model depends on the operating frequency, temperature and bias conditions. A neural system design is displayed to encourage the expectation exactness of the presented show. The Model accuracy has been demonstrated by coordinating anticipated and estimated values of heterojunction transistors for a specific data set of noise parameters at various frequencies, temperatures and bias points. Here the design will be to investigative noise model of an AlGaAs/InGaAs/GaAs Hetrojunction transistor. It is shown that introducing DNA computing enhances th...
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Journal of Physics: Conference Series, Feb 1, 2020
Transmitting data over unsecured Channels is one of the most indispensable issues which motivates... more Transmitting data over unsecured Channels is one of the most indispensable issues which motivates researchers to study. In this paper, a new hybrid digital signature approach is going to be proposed which integrates the elliptic curve cryptosystem (ECC) into Ong, Schnorr, and Shamir signature (OSS). A self-invertible 8×8 key matrix will be utilized as a portion of the OSS digital signature. The strength of the proposed technique relies on combining couple of fundamental mathematical problems namely the discrete logarithm problem (DLP) and integer factorization problem (IFP). Elaborated results regarding security and time rendering analysis have been measured and confirmed its durability against diverse patterns of attacks. The submitted technique can be applied as a substitutional protocol if all the familiar systems are executed.
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Progress In Electromagnetics Research C
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Journal of Physics: Conference Series
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The International Conference on Electrical Engineering
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The International Conference on Electrical Engineering
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Microsystem Technologies
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2016 World Symposium on Computer Applications & Research (WSCAR), 2016
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2016 World Symposium on Computer Applications & Research (WSCAR), 2016
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Communications on Applied Electronics, 2016
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2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), 2016
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2016 18th Mediterranean Electrotechnical Conference (MELECON), 2016
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Renewable Energy, Jul 1, 2001
Very large-area (200 cm2) thin multicrystalline silicon sheets having large grain size were produ... more Very large-area (200 cm2) thin multicrystalline silicon sheets having large grain size were produced directly on graphite by unidirectional solidification of acid-leached and gettered metallurgical silicon powder. The metallurgical silicon powder was acid treated by refluxing in aqua regia for several days and then gettered in air with P2O5 at 1050°C for 3–5 days.After cleaning and drying the acid-treated and
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2006 International Conference on MEMS, NANO, and Smart Systems, 2006
... In the same MYA Ismail was with the Arab Academy for Science and Technology, Alexandria 21937... more ... In the same MYA Ismail was with the Arab Academy for Science and Technology, Alexandria 21937 EGYPT. He is now with Qatar Steel, Qatar. ... [5] RH Chen et al., MS-DOS version of MOSES I, http: /J hana.physics. sunysb.edu /setlsoftware/index.html. ...
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Proceedings. IEEE Energy and Information Technologies in the Southeast', 2000
ABSTRACT Large-area polycrystalline silicon solar cells were prepared by the chemical vapor depos... more ABSTRACT Large-area polycrystalline silicon solar cells were prepared by the chemical vapor deposition (CVD) of a p+-n junction using the hydrogen reduction of trichlorosilane. The substrate was prepared by melting and then unidirectionally solidifying fine-grain metallurgical-grade silicon on a graphite plate. The starting silicon was purified by continuous heating with aqua regia under reflux conditions, and the gettered by heating at 1050°C with P2O5 prior to recrystallization. The front contact to the cell was formed by the vacuum deposition of a Ti/Ag film through a metal mask. The graphite was the back contact. An antireflection coating of SnO2 was deposited by CVD. The cells were characterized by measuring the cell efficiency, short-circuit current spectral response, and minority carrier diffusion length. Heat treatment at 900°C in hydrogen further improved the cell response
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Papers by roshdy abdelrassoul