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4-Port Octagonal Shaped MIMO Antenna with Low Mutual Coupling for UWB Applications

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1999-2015页

作者： Mahmoud A.abdelghany mohamed Fathy Abo Sree Arpan Desai Ahmed A.Ibrahim Electrical Engineering Department College of EngineeringPrince Sattam bin Abdulaziz UniversityWadi Addwasir11991Saudi Arabia Electronic and Communication Department Arab Academy for ScienceTechnology and Maritime TransportCairo11865Egypt Department of Electronics and Communication Engineering CSPITCharotar University of Science and Technology(CHARUSAT)Changa388421India Electronics and Communications Engineering Department Minia UniversityEl-Minia61519Egypt

A4-port multiple-input multiple-output(MIMO)antenna exhibiting lowmutual coupling andUWBperformance is *** octagonal-shaped four-antenna elements are connected with a 50microstrip feed line that is arranged rotationally to achieve the orthogonal polarization for improving the MIMO system *** antenna has a wideband impedance bandwidth of 7.5GHz with S11<−10 dB from(103.44%)3.5–11GHz and inter-element isolation higher than 20 *** validation is carried out by verifying the simulated and measured results after fabricating the *** results in the form of omnidirectional radiation patterns,peak gain(≥4 dBi),and Envelope Correlation Coefficient(ECC)(≤0.01)are extracted to validate the suggested antenna ***,time-domain analysis was investigated to demonstrate the operation of the suggested antenna in wideband ***,the simulated and experimental outcomes have almost similar tendenciesmaking the antenna suitable for its use in UWBMIMOapplications.

关键词： MIMO antenna low mutual coupling time domain analysis UWB antenna

IRKO:An Improved Runge-Kutta Optimization Algorithm for Global Optimization Problems

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Computers, Materials & Continua 2022年第3期70卷 4803-4827页

作者： R.Manjula Devi M.Premkumar Pradeep Jangir mohamed abdelghany Elkotb Rajvikram Madurai Elavarasan Kottakkaran Sooppy Nisar Department of Computer Science and Engineering Kongu Engineering CollegePerundurai638060Tamil NaduIndia Department of Electrical&Electronics Engineering Dayananda Sagar College of EngineeringBengaluru560078KarnatakaIndia Rajasthan Rajya Vidyut Prasaran Nigam Sikar332025RajasthanIndia Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia Mechanical Engineering Department Faculty of EngineeringKafrelsheikh UniversityEgypt Clean and Resilient Energy Systems(CARES)Laboratory Texas A&MUniversityGalveston77553TXUSA College of Arts and Sciences Prince Sattam bin Abdulaziz UniversityWadi Aldawaser11991Saudi Arabia

Optimization is a key technique for maximizing or minimizing functions and achieving optimal cost,gains,energy,mass,and so *** order to solve optimization problems,metaheuristic algorithms are *** of these techniques are influenced by collective knowledge and natural *** is no such thing as the best or worst algorithm;instead,there are more effective algorithms for certain ***,in this paper,a new improved variant of a recently proposed metaphorless Runge-Kutta Optimization(RKO)algorithm,called Improved Runge-Kutta Optimization(IRKO)algorithm,is suggested for solving optimization *** IRKO is formulated using the basic RKO and local escaping operator to enhance the diversification and intensification capability of the basic RKO *** performance of the proposed IRKO algorithm is validated on 23 standard benchmark functions and three engineering constrained optimization *** outcomes of IRKO are compared with seven state-of-the-art algorithms,including the basic RKO *** to other algorithms,the recommended IRKO algorithm is superior in discovering the optimal results for all selected optimization *** runtime of IRKO is less than 0.5 s for most of the 23 benchmark problems and stands first for most of the selected problems,including real-world optimization problems.

关键词： Engineering design global optimization local escaping operator metaheuristics Runge-Kutta optimization algorithm

Survey Study of Acute and Long Term Effects of Female Genital Mutilation among Women in Sharkia Governorate

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Open Journal of Obstetrics and Gynecology 2014年第14期4卷 874-880页

作者： Essa M. Arafa Amany M. abdelghany Nadia M. Madkour Wael S. Nossair Ekramy A. mohamed Department of Obstetrics and Gynecology Zagazig University Hospitals Zagazig Egypt

Objective: The aim of this study is to evaluate the acute and long-term effects of female genital mutilation (FGM) among women in Sharkia Governorate. Method: This was a cross-sectional descriptive study carried out in Zagazic University Hospital (ZUH) over a two years period from January 2012 to January 2014. The overall sample consisted of 1500 women. An interview was utilized to collect the necessary data. The questionnaires were administered face to face, in Arabic language. Four open and 25 close-ended questions were used to collect socio-demographic data of the sample: women’s experience about the circumcision, occurrence of health hazards after circumcision, and sexual effects on married women. Intention of all women (circumcised or not) to circumcise?their daughters was also documented. Results: This study revealed that the prevalence of FGM in?Sharkia Governorate was about 85.5%. The majority of circumcised women were Muslims (94.4%), married (87.9%), housewife (81.4%), illiterate or with low education level (45.5% and 38.5% respectively) and from rural areas (82.2%). The most common types of FGM were type I (49.2%) and type II (50.8%). The most common motive of FGM was the religious cause (46.6%). The majority of circumcised women (59%) denied the occurrence of any acute complication. The reported acute complications in this study were bleeding (19.6%), urine retention (2.3%), infection (6.3%) and difficult walking (12.8%). The majority of circumcised women (86%) denied the occurrence of any problems at labor related to circumcision. The reported problems at labor in this study were narrowing of introitus (8.4%), laceration (0.7%) and bleeding (4.9%). In this study, 74.6% of circumcised women believed that there was no effect of circumcision on their sexual satisfaction and 92.1% of circumcised women believed that there was no effect of circumcision on their husband’s sexual satisfaction. Approximately 16% of circumcised women complained of dyspareunia and

关键词： Female Genital Mutilation Female Circumcision Sexual Satisfaction

Correlation between Perifollicular Vascularity and Outcome in Stimulated Intrauterine Insemination Treatment Cycles: A Study Using Two-Dimensional Transvaginal Power Doppler Ultrasound

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Open Journal of Obstetrics and Gynecology 2014年第15期4卷 973-980页

作者： Nadia M. Madkour Wael S. Nossair Essa M. Arafa Amany M. abdelghany Ekramy A. mohamed Walid A. Abdelsalam Obstetrics & Gynecology Department Faculty of Medicine Zagazig University Zagazig Egypt

Objective:?The aim of this study is to assess any potential relationship between perifollicular vascularity and occurrence of pregnancy in cases of stimulated IUI cycles using the subjective grading system by 2D transvaginal power Doppler ultrasonography.?Design: A prospective cross sectional cohort study. Method: This is a prospective cross-sectional cohort study of 90 stimulated IUI treatment cycles. Selected women were prescribed clomiphene citrate combined with highly purified urinary follicle stimulating hormone. All patients underwent serial transvaginal ultrasound scans starting from day 6 to 7 of the cycle. Perifollicular Doppler blood flows were assessed in dominant follicles ≥18 mm. The patients then were categorized into 3 groups (high vascularity group {G3 & G4}, low vascularity group {G1 & G2} and mixed grades group). Other parameters measured included number of follicles ≥ 18 mm in both ovaries, endometrial thickness and estradiol (E2) level . Human chorionic gonadotropin (hCG) injection 10,000 IU IM was given to the patient when the dominant follicle reached 18 mm in diameter. At that time, the endometrium was evaluated as regards endometrial thickness. IUI was carried out using prepared/“washed” semen (husband). All patients received luteal support in the form of progesterone from day of IUI for 14 days. Serum Β-hCG was estimated 2 weeks after insemination. Results: In this study, from all 90 cases only 8 cases got pregnant with pregnancy rate of 8.88% (6 cases got pregnant in high grade vascularity group;2 cases in mixed grades group and no cases got pregnant?in low grade group). There was statistically significant difference among the 3 groups as regarding?the pregnancy rate (P value = 0.02). There is statistically significant difference in perifollicular resistance index (RI) and pulsatility index (PI) between pregnant and non pregnant cases (P value = 0.016 and 0.047 respectively). In this study, there is no statistically significant difference b

关键词： Perifollicular Vascularity IUI 2D Power Doppler Ultrasound

Accuracy of Intraoperative Frozen Section in the Diagnosis of Ovarian Neoplasms

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Open Journal of Obstetrics and Gynecology 2015年第1期5卷 14-22页

作者： Amany M. abdelghany Essa M. Arafa Nadia M. Madkour Wael S. Nossair Ekramy A. mohamed Walid A. Abdelsalam Amira A. Salem Obstetrics & Gynecology Department Faculty of Medicine Zagazig University Zagazig Egypt

Objective: The aim of the work is to evaluate the accuracy of intraoperative frozen section in the diagnosis of ovarian neoplasms in Zagazig University. Design: A prospective cross sectional cohort study. Method: This study was performed between March 2011 and March 2012, on 50 patients presented with ovarian mass. Gross examination of the tumor removed was done by inspection and palpation. The specimen was then cut with a sharp knife into two halves. The most appropriate area thought to be representative of lesion was chosen. The number of sections frozen was depended on the type and size of the tumor. Seven to eight μm sections were obtained and stained with hematoxylin-eosin. The specimens were then fixed in formalin. Paraffin blocks of the sections were processed in the routine way and sections were stained with hematoxylin and eosin (H and E). The diagnosis obtained by intraoperative frozen section based on cellularity and cell morphology was compared with final histopathological diagnosis in terms of diagnostic sensitivity, to differentiate between benign and malignant lesions. Assessment of the overall accuracy of the intraoperative diagnosis was classified as concordant or discordant. Results: There was no statisticaly significant differencre in the studied patients as regard the clinical data, macroscopic and intraoperative picture, while there was statisticaly significat association as regard the laterality of the ovarian masses. The validity of frozen section in the diagnosis of benign tumour was 100% with 100% accuracy, specificity, positive predictive value, negative predictive value, while sensitivity & negative prediction for borderline tumour and specificity & positive prediction of malignant tumour were 100%, specifecity for borderline tumours was 95% while the positive predictive value was 33.3% with 96% accuracy for both malignant and borderline tumours. Conclusion: Intraoperative frozen section is accurate for rapid diagnosis of ovarian tumors. I

关键词： Intraoperative Frozen Section Ovarian Neoplasms

Comparative Study between Intraoperative Frozen Section and Scrape Smear Cytology in the Diagnosis of Ovarian Neoplasm

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Open Journal of Obstetrics and Gynecology 2015年第1期5卷 28-35页

Objective: The aim of this work is to compare between intraoperative frozen section and scrape smear cytology in the diagnosis of ovarian neoplasm. Method: This study was performed between March 2011 and March 2012, on 50 patients presented with ovarian mass. Gross examination of the tumor removed was done by inspection and palpation. The specimen was then cut with a sharp knife into two halves. The area was scraped with a sharp scalpel or the end of a glass slide, depending upon the type of tissue. A semifluid drop thus obtained was spread over a glass slide. One to four slides per case were taken from different representative areas. The slides were labelled and immediately put into 95% ethyl alcohol and stained with hematoxylin-eosin. The specimens were then fixed in formalin. Paraffin blocks of the sections were processed in the routine way and sections were stained with hematoxylin and eosin (H and E). Assessment of the overall accuracy of the intraoperative diagnosis was classified as concordant or discordant. Results: The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of scraping technique in the diagnosis of benign ovarian masses were 100%, 95.2%, 96.7%, 100% and 98% respectively. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of scraping technique in the diagnosis of border line ovarian masses were 100%, 93.4%, 25%, 100% and 94% respectively. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of scraping technique in the diagnosis of malignant ovarian masses were 80%, 100%, 100%, 88.2% and 92% respectively. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of frozen section in the diagnosis of benign ovarian masses were 100%, 100%, 100%, 100% and 100% respectively. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of frozen section

关键词： Frozen Section Intraoperative Assessment Scrape Smear Cytology Ovarian