Abdelrahmanadel

Abdelrahman Adel Abdelaziz Elsayed

Lecturer - Consultant cardiothoracic Surgery

Faculty of medicine

Address: Cairo_ Madinaty

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Publications Which contain the keyword:

Evaluation of the therapeutic effect of corneal collagen cross-linking in the treatment of resistant corneal ulcer

2018-09-20 13:12:06 Keywords anterior OCT, corneal healing, ,
Evaluation of the therapeutic effect of corneal collagen cross-linking in the treatment of resistant corneal ulcer
PURPOSE The aim of this study was to evaluate the therapeutic results of corneal collagen cross-linking (CXL) in terms of safety and efficacy in the treatment of resistant corneal ulcer. DESIGN This study was designed as a noncomparative prospective clinical trial. PATIENTS AND METHODS Five eyes of five patients with resistant corneal ulcers that failed to heal after maximal topical ... Read more

Comparison of epithelium-off and transepithelial corneal collagen cross-linking for treatment of keratoconus

2018-09-20 13:13:57 Keywords cross-linking, epithelium-off, ,
Comparison of epithelium-off and transepithelial corneal collagen cross-linking for treatment of keratoconus
PURPOSE The aim of the study was to assess the safety and efficacy of epithelium-off corneal cross-linking (conventional cross-linking) versus epithelium-on cross-linking (epithelium-on cross-linking) in the treatment of keratoconus. PATIENTS AND METHODS This study was a nonrandomized comparative trial. Forty-three eyes of 35 patients were included in this study. All eyes were subjected to the preoperative and postoperative measures including ... Read more

Hysteroscopic findings of the uterine cavity for women with recurrent pregnancy loss

2018-09-20 14:11:39 Keywords Hysteroscopy, uterine defects, ,
Hysteroscopic findings of the uterine cavity for women with recurrent pregnancy loss
OBJECTIVE: The purpose of this study was to determine the frequency of uterine defects (congenital and acquired) in patients with two consecutive miscarriages or more as a one of the investigative procedures. DESIGN AND SETTING: This is a prospective observational study was done in the departments of Obstetrics & Gynaecology, Sohag university hospital. PATIENTS AND METHODS: Ninety two patients with ... Read more

Self-Oscillating Fly-back Converter for Mobile Batteries Charging Applications‏

2018-09-20 20:14:44 Keywords Fly-back converter, , Battery Ch,
Self-Oscillating Fly-back Converter for Mobile Batteries Charging Applications‏
The self-oscillating flyback converter is a popular circuit for cost-sensitive applications due to its simplicity and low component count. This paper presents self-oscillating fly-back converter for mobile batteries charging applications. The converter is designed to step-down the high voltage input to an acceptable level from 220 VAC to 7VDC. By adding indictor and capacitor the power factor and input currant ... Read more

Optimal allocation of renewable dg sources in distribution networks considering load growth

2018-09-20 23:04:42 Keywords load demand, renewable DG sources, , electrical distribution networ,
Optimal allocation of renewable dg sources in distribution networks considering load growth
The annual increasing of load demand in electrical distribution networks leads to line congestion, decreasing the bus voltages below the acceptable limits and increasing the active and reactive power losses. However, renewable distributed generation (DG) has received increasing attention due to that growing in load demand. This paper presents a hybrid method based on moth-flame optimization (MFO) algorithm with loss ... Read more

Optimal siting and sizing of SSSC using improved harmony search algorithm considering non-smooth cost functions

2018-09-20 23:30:59 Keywords nonsmooth cost functions, ,
Optimal siting and sizing of SSSC using improved harmony search algorithm considering non-smooth cost functions
Static Synchronous Series Compensator (SSSC) is an elegant member of Flexible Alternating Current Transmission Systems (FACTS) devices. SSSC can be used to control the active and reactive power flows of transmission lines. In this paper, improved harmony search algorithm (IHS) is applied to determine the optimal location and parameter settings of SSSC in power systems. The optimal power flow (OPF) ... Read more

Renal failure after upper-gastrointestinal bleeding among cirrhotic patients in Upper Egypt

2018-09-21 07:48:22 Keywords liver cirrhosis, renal failure, ,
Renal failure after upper-gastrointestinal bleeding among cirrhotic patients in Upper Egypt
Background and study aims: Renal dysfunction is a common and serious problem in patients with advanced liver disease. The study aims to assess the incidence, risk factors and short-term prognosis of renal failure after upper-gastrointestinal bleeding among cirrhotic patients in Upper Egypt. Methods: We recruited 159 cirrhotic patients with 168 episodes of upper-gastrointestinal bleeding from Tropical Medicine and Gastroenterology Department, ... Read more

DETECTION OF ENTEROTOXIGENIC METHICILLIN RESISTANT STAPHYLOCOCCUS AUREUS IN DAIRY DESSERTS BY MULTIPLEX - PCR

2018-09-21 18:37:22 Keywords Staph aureus, Dairy desserts, ,
DETECTION OF ENTEROTOXIGENIC METHICILLIN RESISTANT STAPHYLOCOCCUS AUREUS IN DAIRY DESSERTS BY MULTIPLEX - PCR
The aim of this study is to evaluate the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) in dairy desserts samples and to investigate the antimicrobial resistance and molecular characteristics of these strains using PCR. A total of 120 samples comprising sweetened whipped cream, mehallabeia, ice cream and rice with milk were randomly collected from confectioneries, dairy shops, primitive restaurants and supermarkets ... Read more

Occult Hepatitis B Virus Infection among Egyptian Hepatitis C Virus Seropositive and Seronegative Hemodialysis Patients in Sohag Government, Upper Egypt

2018-09-21 19:42:18 Keywords Occult HBV, , HCV, Hemodialysis, HCV, Hemodialysis,
Occult Hepatitis B Virus Infection among Egyptian Hepatitis C Virus Seropositive and Seronegative Hemodialysis Patients in Sohag Government, Upper Egypt
Background: Hepatitis B virus (HBV) and hepatitis C virus (HCV) Infections are important and common causes of liver disease in end-stage renal failure (ESRF) in patients on haemodialysis (HD). HBV is less endemic than HCV in Egypt (ranges from 2%–7%). Although, the prevalence of HBV in haemodialysis patients has decreased significantly due to HBV vaccine and screening of blood donors, ... Read more

Developed generalised unified power flow controller model in the Newton–Raphson power-flow analysis using combined mismatches method

2018-09-22 10:24:15 Keywords GUPFC , FACTS, ,
Developed generalised unified power flow controller model in the Newton–Raphson power-flow analysis using combined mismatches method
This study proposes the generalised unified power flow controller (GUPFC) model in the hybrid current power mismatch Newton–Raphson formulation (HPCIM). In this model, active power, real and imaginary current components are injected at the terminals of series impedances of GUPFC. These injected values are calculated during the iterative process based on the desired controlled values and buses voltage at the ... Read more