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Gü,l, Bahar Yavuztü,rk,Imer, Derya Yü,ksel,Park, Pyung-Kyu,Koyuncu, Ismail IWA Publishing 2018 Water Science & Technology Vol.78 No.2
<P>This study aimed to address the gap in understanding how the microbial community present within quorum quenching-membrane bioreactor (QQ-MBRs) changes during the operations by investigating the behavior of two different types of QQ bacteria, <I>Bacillus</I> sp. T5 and <I>Delftia</I> sp. T6. The anti-biofouling effects of T5 and T6 in the QQ-MBR were 85% and 76%, respectively. According to the Illumina HiSeq results, when the QQ-MBR was operated with Gram-positive bacteria, T5, in the mixed liquor a reduction was observed in Gram-positive bacteria and Gram-negative bacteria population increased. In contrast, when the QQ-MBR was operated with Gram-negative bacteria, T6, Gram-negative bacteria population reduced and an increase in Gram-positive bacteria observed. As such, the outputs of the Illumina analysis revealed that use of Gram-negative QQ bacteria in the reactor induced a Gram-positive microbial community and vice versa. This indicates that a close interaction occurs between indigenous Gram-negative and positive bacterial phyla, and <I>Bacillus</I> sp. T5/<I>Delftia</I> sp. T6 is fundamental to the performance of MBRs. This is the first study demonstrating such a relationship and assistance selecting QQ bacteria/strategy in an effective way.</P>
Spectral Solution of Poisson Equation over Infinite Branched Channel
I. A. Ismail,G. Ismail,A. M. Sedqi 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
In this paper, we present a direct spectral collocation method for solving Poisson equation in polar coordinates. This equation is expressed spectrally over the unit circle. The resulting equation in spectral form is solved to give a solution to Poisson equation with Dirichlet boundary conditions at collocation points. The unit circle domain is conformally transformed to Y-geometry, retaining the value of the solution to give the solution of the same problem over Y-shape channel. Poisson equation can be solved similarly over many other geometries. The method is easy to implement, fast and gives spectral accuracy.
A PREDICTOR-CORRECTOR SCHEME FOR THE NUMERICAL SOLUTION OF THE BOUSSINESQ EQUATION
Ismail, M.S.,Bratsos, A.G. 한국전산응용수학회 2003 Journal of applied mathematics & informatics Vol.13 No.1
A fourth order in time and second order in space scheme using a finite-difference method is developed for the non-linear Boussinesq equation. For the solution of the resulting non-linear system a predictor-corrector pair is proposed. The method is analyzed for local truncation error and stability. The results of a number of numerical experiments for both the single and the double-soliton waves are given.
K.G. Abdel-Kader,A.A.M. Ismail,F.A.S. Soliman,A.S.S. El-Kabbani,A.Yahya,A.M. Abdel-Maksood 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.12
Recent developments in airborne magnetic detection systems have made it possible to detect much small magnetic objects such as unexploded ordnance. However, the data sets are extremely large and the measurements must be processed and interpreted. Therefore, there is an increasing need for a fully automatic processing and interpretation techniques that can be used to make decisions regarding the nature of the source in real time. So, the aim of the present paper is to shed further light on the real time correction of parallax/Lag -and air-condition-noises in airborne magnetic data acquisition. A novel electronic technique, based on micro-controllers design and implementation, was designated for real-time processing applications. The proposed technique shows excellent airborne magnetic data results considering actual field examples. The proposed technique verifies an accurate and objective tool for magnetic objects detection compared with the existing PEI tools considering cost and processing automation capabilities.
Cancer incidence in the Tobruk area, eastern Libya: first results from Tobruk Medical Centre
Faisal Ismail,Ahmed G,Elsayed,Islam El-Garawani,Eman Abdelsameea 한국역학회 2021 Epidemiology and Health Vol.43 No.-
OBJECTIVES: Cancer is a major cause of morbidity and mortality worldwide, and it is an increasing problem in developing countries. Estimation of the incidence of cancer is important, especially in regions with limited epidemiological data on cancer. Therefore, the aim of this study was to provide an updated report on the incidence of cancers in the Tobruk region in eastern Libya. METHODS: Data on cancer patients from the records of the Department of Histopathology of Tobruk Medical Centre from January 2013 to June 2020 were included. RESULTS: In total, 402 cases were recorded. Men patients accounted for 30.3% (n= 122) of cases, and women patients repre-sented 69.6% (n= 280). The overall mean age at the time of the first diagnosis was 49.0± 17.1 years. The most common malig-nancies were breast and uterine cancer in women (18.4%, n= 74; 15.9%, n= 64, respectively), colorectal cancer (11.6%, n= 47; 26 in women and 21 in men), bladder cancer (8.2%, n= 33; 8 in women and 25 in men), and thyroid cancer (8.0%, n= 32; 23 in women and 9 in men). CONCLUSIONS: Breast and uterine cancers were the most common cancers in women, and bladder and colorectal cancer were the most common cancers in men, followed by colorectal cancer in both genders. These data will help health authorities launch preventive plans for cancer in the region. Further studies to identify aetiological factors and cancer-related risk factors need to be conducted in the region.
Long-term outcomes of intraoperative and perioperative albendazole treatment in hepatic hydatidosis
Kagan Karabulut,G. Selcuk Ozbalci,Tugrul Kesicioglu,Ismail Alper Tarim,Gokhan Lap,Ayfer Kamali Polat,Ilhan Karabıcak,Kenan Erzurumlu 대한외과학회 2014 Annals of Surgical Treatment and Research(ASRT) Vol.87 No.2
Purpose: The aim of this study was to evaluate long-term outcome of the intraoperative and perioperative albendazole (ALB) treatment on the recurrence and/or secondary hydatidosis. Methods: One hundred and one patients with hepatic hydatidosis were treated intraoperatively and perioperatively with ALB, in addition to surgery. Perioperative ALB treatment was given in a dose of 12?15 mg/kg/day. The ALB treatment was started 13.27 ± 14.34 days before the surgery, and it was continued for 4.39 ± 3.11 months postoperatively. A total of 1.7 mg/mL of ALB solution was used as a protoscolidal agent. The follow-up period was 134.55 ± 51.56 months. Results: Four patients died, with only one death was secondary to hydatid disease (cerebral eccinococcus). There was only one recurrence (1%) of hepatic hydatidosis. Early and late morbidity rates were 8.91% and 7.92%, respectively. Conclusion: Our results suggest that intraoperative and perioperative ALB is effective for the prevention of hepatic hydatidosis recurrence and/or secondary hydatidosis.
Lago, Taynara G.S.,Ismail, Kamal A.R.,Nobrega, Claudia R.E.S.,Moura, Luiz F.M. Techno-Press 2020 Advances in energy research Vol.7 No.1
Energy consumption of air-conditioning and refrigeration systems is responsible for about 25 to 30% of the energy demand especially in hot seasons. This equipment is mostly electricity dependent and their use in principle affects negatively the environment. Enhancing the energy efficiency of the existing equipment is important as one of the measures to reduce environment impacts. This paper reports the results of an experimental study to evaluate the impacts of the use electronic expansion valve and variable velocity compressor on the performance of vapor compression refrigeration system. The experimental rig is composed of two independent circuits one for the vapor compression system and the other is the secondary fluid system. The vapor compression system is composed of a forced air condenser unit, evaporator, hermetic compressor and expansion elements, while the secondary system has a pump for circulating the secondary fluid, and an air conditioning heat exchanger. The manufacturer's data was used to determine the optimal points of operation of the system and consequently tests were done to evaluate the influence of variation of the compressor velocity and the opening of the expansion device on the performance of the refrigeration system. A fuzzy logic model was developed to control the rotational velocity of the compressor and the thermal load. Fuzzy control model was made in LabVIEW software with the objective of improving the system performance, stability and energy saving. The results showed that the use of fuzzy logic as a form of control strategy resulted in a better energy efficiency.
Thabit Hammam Abdurabu,Ismail Abd Khamim,Sayyed M.I.,Hashim S.,Abdullahi I.,Elsafi Mohamed,Keshavamurthy K.,Jagannath G. 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.1
The glass series modified by tungsten oxide was created using the compounds (75-x) B2O3– 10SrCO3– 8TeO2– 7ZnO - xWO3, where x = 0, 1, 5, 10, 22, 27, 34, and 40% mole percentage. A UV–visible spectrophotometer and thermogravimetric-differential thermal analysis (TG-DTA) methods were employed to characterize the specimen’s optical and phase transition attributes, respectively. The mass-attenuation coefficient (AC) of all created glasses from BSTZW0 to BSTZ7 was estimated using Geant4 code from 0.05 to 3 MeV and compared to the XCOM software results, with a relative difference of less than 2% between the two results. The increase of WO3 percentage lead to an increase in the Linear-AC at each studied energy, and this is mainly due to the fact that the higher the percentage of WO3 in the glass increases its density which causes an increase in the Linear-AC, so an energy of 0.06 MeV, as an example, the values of the Linear-AC was 4.009, 4.509, 5.442, 6812, 8.564, 9.856, 10.999 and 11.628 cm 1 form BSTZW0 too BSTZW7, respectively. The Half-VL (value layer), Mean-FP (free path), Tenth-VL, and Radiation attenuation performance (RAP) were also calculated for the current BSTZW-glass samples and revealed that BSTZW7 had the best gamma ray attenuation performance at all discussed energies when compared to other studied glass samples.