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Riad Al-Kasasbeh,Nikolay Korenevskiy,Florin Ionescou,Mahdi Alshamasin,Alexander Kuzmin 사단법인약침학회 2011 Journal of Acupuncture & Meridian Studies Vol.4 No.3
A great number of reflexologies use ancient concepts that do not coincide with modern medical terminology of anatomy, physiology, and biophysics, substantially reducing the trust of today’s physicians in this direction of their profession. Recently, several mathematical models of internal and biological active points of meridian structures interaction have been proposed. These models allowed specification of diseases for which reflex diagnostics and reflex therapy methods are most effective and also increased the efficacy of these procedures. Good results for the prediction and early diagnosis of diseases from the reaction energy of biologically active points (acupuncture points) are obtained using fuzzy logic decision making.
Riad, Bahia Y.,Abdelhamid, Abdou O. The Pharmaceutical Society of Korea 1989 Archives of Pharmacal Research Vol.12 No.2
Several new 1,2,4-triazolo[5,1-a]pyrimidine derivatives were synthesized via the reactions of 3-amino-1,2,4-triazole with active methylene nitrites and thier ylidene derivatives. The structures assigned for the reaction products were based on elemental analyses and spectral data.
Strength model for square concrete columns confined by external CFRP sheets
Riad Benzaid,Habib Abdelhak Mesbah 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.46 No.1
An experimental study has been carried out on square plain concrete (PC) and reinforced concrete (RC) columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets. A total of 78 specimens were loaded to failure in axial compression and investigated in both axial and transverse directions. Slenderness of the columns, number of wrap layers and concrete strength were the test parameters. Compressive stress, axial and hoop strains were recorded to evaluate the stress-strain relationship, ultimate strength and ductility of the specimens. Results clearly demonstrate that composite wrapping can enhance the structural performance of square columns in terms of both maximum strength and ductility. On the basis of the effective lateral confining pressure of composite jacket and the effective FRP strain coefficient, new peak stress equations were proposed to predict the axial strength and corresponding strain of FRP-confined square concrete columns. This model incorporates the effect of the effective circumferential FRP failure strain and the effect of the effective lateral confining pressure. The results show that the predictions of the model agree well with the test data.
Y, Riad-Bahia,O, Abdelhamid-Abdou,Khalifa, Fathy-A,E, Saleh-Youssry The Pharmaceutical Society of Korea 1989 Archives of Pharmacal Research Vol.12 No.3
The reaction of acetoacetanilide (1) with the $\alpha$-cyanocinnamonitrile derivatives 2 yielded the Michael adducts 4 which could be converted into the pyrano [2, 3, -c] pyrazole derivatives 5 via their reaction with hydrazine hydrate. Cyclisation of 4 afforded the derivatives 10. The pyranopyrazoles 9 reacted with different activated nitrile derivatives (3a-c) to give the pyrano [2, 3-c] pyridine derivatives 13. 16 and 19 respectively. The biological activity of the synthesised heterocyclic derivatives was investigated and discussed.
Strength model for square concrete columns confined by external CFRP sheets
Benzaid, Riad,Mesbah, Habib Abdelhak Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.46 No.1
An experimental study has been carried out on square plain concrete (PC) and reinforced concrete (RC) columns strengthened with carbon fiber-reinforced polymer (CFRP) sheets. A total of 78 specimens were loaded to failure in axial compression and investigated in both axial and transverse directions. Slenderness of the columns, number of wrap layers and concrete strength were the test parameters. Compressive stress, axial and hoop strains were recorded to evaluate the stress-strain relationship, ultimate strength and ductility of the specimens. Results clearly demonstrate that composite wrapping can enhance the structural performance of square columns in terms of both maximum strength and ductility. On the basis of the effective lateral confining pressure of composite jacket and the effective FRP strain coefficient, new peak stress equations were proposed to predict the axial strength and corresponding strain of FRP-confined square concrete columns. This model incorporates the effect of the effective circumferential FRP failure strain and the effect of the effective lateral confining pressure. The results show that the predictions of the model agree well with the test data.
New Direct Torque Neuro-Fuzzy Control Based SVM-Three Level Inverter-Fed Induction Motor
Toufouti Riad,Benalla Hocine 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.2
In this paper, a novel direct torque neuro-fuzzy control (DTCNF) scheme combining with space voltage modulation (SVM) technique of a three levels inverter is presented. Using neuro-fuzzy technique, the reference space voltage vector can be obtained dynamically in terms of torque error, stator flux error and the angle of stator flux. Compared with conventional direct torque control (C_DTC), in this new technique, the ripples of both torque and flux are reduced remarkable, and switching frequency is maintained constant. Simulation results verify the validity of the proposed method.
Blacklisting and Forgiving Coarse-grained Access Control for Cloud Computing
Khaled Riad 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.11
Cloud security is a shared responsibility between cloud providers and users. Reaching to an agreement about the dynamic policies considered for the access control decision-making process is not an easy task in cloud computing. Such dynamic policies can be built in a coarse-grained sharing manner between cloud providers and data owners. The trust notation can provide these dynamic policies, based on multiple factors that can accurately compute the user’s trust level for the granting access entity. In this paper, we have introduced the formal trust definition, which imports a novel method to provide the basis for granting access. It is based on two factors and their semantic relations which investigate important measures for the cloud environment. Also, a new Blacklisting and Forgiving Coarse-grained Access Control (BF-CAC) model has been proposed. The proposed model supports changing the user’s assigned permissions dynamically based on its trust level. In addition, BF-CAC ensures secure resource sharing between potential untrusted tenants. The proposed model has been implemented on our private cloud environment based on OpenStack. Finally, the experimental results have indicated that the trust level is decaying over time, thus no user can be trusted forever. Also, the number of assigned permissions for the same user is dynamically changing with the user’s final trust level.
A New Modified MPPM for High-Speed Wireless Optical Communication Systems
Mehdi Rouissat,Riad A. Borsali,Mohammad E. Chikh-Bled 한국전자통신연구원 2013 ETRI Journal Vol.35 No.2
Previous work proposed combining multipulse pulse position modulation (MPPM) with pulse amplitude modulation to form multipulse amplitude and position modulation (MPAPM), which is a hybrid modulation that results in an improvement in bandwidth efficiency but a degradation in power efficiency. In this paper, to achieve greater power efficiency and a better data rate, we propose multipulse dual amplitude-width modulation, based on MPAPM and pulse width modulation. The proposed scheme shows a remarkable improvement in data rate and a 1.5-dB improvement in power efficiency over MPAPM, while sustaining the bandwidth efficiency. After introducing symbol structure, we present the theoretical expressions of spectral efficiency, the power requirements, and the normalized data rate, as well as the results of comparing the proposed modulation to MPPM and MPAPM.
Damage-based stress-strain model of RC cylinders wrapped with CFRP composites
Mesbah, Habib-Abdelhak,Benzaid, Riad Techno-Press 2017 Advances in concrete construction Vol.5 No.5
In this study, the effects of initial damage of concrete columns on the post-repair performance of reinforced concrete (RC) columns strengthened with carbon-fiber-reinforced polymer (CFRP) composite are investigated experimentally. Four kinds of compression-damaged RC cylinders were reinforced using external CFRP composite wraps, and the stress-strain behavior of the composite/concrete system was investigated. These concrete cylinders were compressed to four pre-damaged states including low -level, medium -level, high -level and total damage states. The percentages of the stress levels of pre-damage were, respectively, 40, 60, 80, and 100% of that of the control RC cylinder. These damaged concrete cylinders simulate bridge piers or building columns subjected to different magnitudes of stress, or at various stages in long-term behavior. Experimental data, as well as a stress-strain model proposed for the behavior of damaged and undamaged concrete strengthened by external CFRP composite sheets are presented. The experimental data shows that external confinement of concrete by CFRP composite wrap significantly improves both compressive strength and ductility of concrete, though the improvement is inversely proportional to the initial degree of damage to the concrete. The failure modes of the composite/damaged concrete systems were examined to evaluate the benefit of this reinforcing methodology. Results predicted by the model showed very good agreement with those of the current experimental program.