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Fathy, I.,Amory-Mazaudier, C.,Fathy, A.,Mahrous, A. M.,Yumoto, K.,Ghamry, E. American Geophysical Union 2014 JOURNAL OF GEOPHYSICAL RESEARCH. SPACE PHYSICS Vol.119 No.5
In this paper we study the planetary magnetic disturbance during the magnetic storm occurring on 5 April 2010 associated with high-speed solar wind stream due to a coronal hole following a coronal mass ejection. We separate the magnetic disturbance associated to the ionospheric disturbance dynamo (Ddyn) from the magnetic disturbance associated to the prompt penetration of magnetospheric electric field (DP2). This event exhibits different responses of ionospheric disturbance dynamo in the different longitude sectors (European-African, Asian, and American). The strongest effect is observed in the European-African sector. The Ddyn disturbance reduces the amplitude of the daytime H component at low latitudes during four consecutive days in agreement with the Blanc and Richmond's model of ionospheric disturbance dynamo. The amplitude of Ddyn decreased with time during the 4days. We discuss its diverse worldwide effects. The observed signature of magnetic disturbance process in specific longitude sector is strongly dependent on which Earth's side faces the magnetic storms (i.e., there is a different response depending on which longitude sector is at noon when the SSC hits). Finally, we determined an average period of 22h for Ddyn using wavelet analysis.
Suggested Integrative Approach for Hand Abscess with Cupping Therapy: a case study
Hussein Emad Ahmed Fathy,Negm Shahira Hassan Ibrahim,Shaikh Tabish Ishaq,Saleh Ahmed Helmy,Hussein Emad Ahmed Fathy 대한약침학회 2023 Journal of pharmacopuncture Vol.26 No.1
A forty-three-year-old male patient was diagnosed with an acute abscess in the dorsum of the right hand. On the 5th day of conventional pharmacological therapy the patient was still suffering, and was referred to the Outpatient department (OPD) to evacuate and drain the abscess and treat the edema around the area with Hijama (wet cupping therapy, WCT). The hand abscess was successfully cured within a week using an integrative approach of wet cupping therapy together with conventional drug therapy.
Fathi Etaher Elbakoush,Qudrat Ullah Khan,Mati Ullah,Arif Ullah,Afaq Ullah Khan,Javed Khan,Asra Iftikhar 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.6
The carbonization performance of the iron-containing carbon film resulting from polyimide was examined, Polyimide/Fe composite films were prepared from Iron (III) 2,4-pentanedionate (Fe(acac)) and poly(amic acid) (PAA) based on ODA and PMDA via a solution process in DMAC, followed by carbonization the polyimide film at a temperature range of 600–1600 °C. The organized polyimide/Fe combined fi lms were characterized using a scanning electron microscope (SEM), and thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Raman. The formation of Fe particles and the synthesis of polyimide (PMDA/ODA) in the polyimide matrix is confirmed by FTIR results. Meantime, in the polyimide matrix, Fe particles were well spread which were showed by the SEM images. Kinetic parameters and thermal stability of the degradation methods for the organized polyimide/Fe combined films were examined in N 2 environment by TGA. The results have shown that the values of the calculated activation energies and thermal stability increased of the (Fe (acac)) the activation energy and loading also different with the weight-loss rate for all compositions.
Fathi hafssa,왕준휘,송학준 한국호텔외식관광경영학회 2018 호텔경영학연구 Vol.27 No.2
Community-based tourism allows for better contact with the local community and for tourist to experience new sensations while enabling the economic and social development of the geographic area. In this paper, a survey in Chefchaoun in Morocco was conducted two times to assess the opinion and perception of visitors and local community investors towards tourism. Current study revealed some problems faced by visitors(e.g., unreasonable accommodation prices, hard selling, overcrowding, poor quality services, unsuitable food prices, inadequate public facilities and entertainment places, and unconfident guide) and some problems recognized by the local community investors(e.g., lack of government interest, poor infrastructure, lack of public facilities and entertainment places, tax, and lack of tourism training centers). According to the results of factor analysis, there are two main factors suggested as strategies to reduce the community problems in Chefchaoun, namely Hardware strategy, and Software strategy. In this part six implications were carried out in present study. The results of present research would be useful to introduce proper strategies and suggestions to meet the needs and requirements of both the visitors and local community investors.
A Novel Quasi-Resonant Snubber-Assisted ZCS-PWM DC-DC Converter with High Frequency Link
Fathy, Khairy,Kwon, Soon-Kurl The Korean Institute of Power Electronics 2007 JOURNAL OF POWER ELECTRONICS Vol.7 No.2
In this paper, a novel type of auxiliary switched capacitor assisted edge resonant soft switching PWM resonant DC-DC converter with two simple auxiliary commutation lossless inductor snubbers is presented. The operation principle of this converter is described using the switching mode equivalent circuits. This newly developed multi resonant DC-DC converter can regulate its DC output AC power under a principle of constant frequency edge-resonant soft switching commutation by an asymmetrical PWM duty cycle control scheme. The high frequency power regulation and actual power characteristics of the proposed soft switching PWM resonant DC-DC converter are evaluated and discussed. The operating performances of the newly proposed soft switching inverter are represented based on simulation results from an applications point of view.
Surface tension (γLV), surface energy (γSV) and crystal-melt interfacial energy (γSL) of metals
Fathi Aqra,Ahmed Ayyad 한국물리학회 2012 Current Applied Physics Vol.12 No.1
The results of temperature-dependent surface tension calculations of pure liquids aluminium (933e1200 K) and iron (1811e2500 K), in the framework of the theoretical considerations suggested by Eyring, are presented. It is observed that the surface tension decreases linearly with temperature. The calculated surface tension data are fitted as g ¼ 985e0.275(T Tm) and g ¼ 1560e0.387(T Tm) for Al and Fe, respectively. Moreover, the surface tension (gLV) at melting point, surface energy (gSV) and crystal-melt interfacial energy (gSL) are calculated for many metals. The agreement between the calculated and the reported measured values is reasonable.
Fathy, Khairy,Kwon, Soon-Kurl,Nakaoka, Mutsuo The Korean Institute of Power Electronics 2007 JOURNAL OF POWER ELECTRONICS Vol.7 No.3
In this paper, a novel type auxiliary active edge resonant snubber assisted zero current soft switching pulse modulation Single-Ended Push Pull (SEPP) series load resonant inverter using IGBT power modules is proposed for cost effective consumer high-frequency induction heating (IH) appliances. Its operating principle in steady state is described by using each switching mode's equivalent operating circuits. The new multi resonant high-frequency inverter with series load resonance and edge resonance can regulate its high frequency output power under a condition of a constant frequency zero current soft switching (ZCS) commutation principle on the basis of the asymmetrical pulse width modulation (PWM) control scheme. Brand-new consumer IH products using the proposed ZCS-PWM series load resonant SEPP high-frequency inverter using IGBTs is evaluated and discussed as compared with conventional high-frequency inverters on the basis of experimental results. In order to extend ZCS operation ranges under a low power setting PWM as well as to improve efficiency, the high frequency pulse density modulation (PDM) strategy is demonstrated for high frequency multi-resonant inverters. Its practical effectiveness is substantially proved from an application point of view.
Reinforced Connection for Upgrading Strength and Efficiency of Single Angle Tension Members
Fathy Abdelmoniem Abdelfattah,Ali Abdel Hakam Ali abdo 한국강구조학회 2016 International Journal of Steel Structures Vol.16 No.2
Single angle tension members are commonly connected by bolting through one leg. Stress concentration and shear lag effects promote the angle failure at the connection region. This angle failure reduces the angle ultimate tensile strength and efficiency of the material. This study proposes a reinforced connection to upgrade the single angle tension strength of the member and its material efficiency. A lug angle was nested into the angle member and bolted to the gusset plate and the angle by the lead bolt in the connection. At some distance, the outstanding legs of the angle and lug angle were bolted. A total of 17 specimens were fabricated and tested until failure. Finite element analysis was performed to model the behavior of the tested specimens and to study the different parameters that may affect the connection's capacity. The proposed reinforced connection increased the tensile strength of the angle and the angle material efficiency by up to 35%. An empirical formula was proposed, and design recommendations are presented.