Bridge-type structures analysis using RMP concept considering shear and bending flexibility

Mahmoud-Reza Hosseini-Tabatabaei,Mohmmad Rezaiee-Pajand,Mahmoud R. Mollaeinia 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.74 No.2

Researchers have elaborated several accurate methods to calculate member-end rotations or moments, directly, for bridge-type structures. Recently, the concept of rotation and moment propagation (RMP) has been presented considering bending flexibility, only. Through which, in spite of moment distribution method, all joints are free resulting in rotation and moment emit throughout the structure similar to wave motion. This paper proposes a new set of closed-form equations to calculate member-end rotation or moment, directly, comprising both shear and bending flexibility. Furthermore, the authors program the algorithm of Timoshenko beam theory cooperated with the finite element. Several numerical examples, conducted on the procedures, show that the method is superior in not only the dominant algorithm but also the preciseness of results.

Review of Heterotopic Thyroid Autotransplantation

Mahmoud Sakr,Ahmed Mahmoud 대한이비인후과학회 2017 Clinical and Experimental Otorhinolaryngology Vol.10 No.4

Total thyroidectomy is increasingly accepted for the management of bilateral benign thyroid disorders. Postoperatively, patients require lifelong levothyroxine replacement therapy to avoid postoperative hypothyroidism, which besides the burden of compliance, has been proven to be associated with several long-term side effects. Heterotopic thyroid autotransplantation was proposed several decades ago to avoid the need for life-long postoperative replacement therapy with maintaining the autoregulatory mechanism of thyroxin production inside the body according to its needs. Available data regarding this topic in literature is relatively poor. Before applying thyroid autotransplantation on humans, several studies have been done on animals, where the autologous transplantations were found to be successful in almost all the cases, proved by follow up postoperative 8-week measurements of thyroid hormones and histopathological examination of the removed autografts. Regarding the clinical application, few trials have been done using cryopreserved in vivo, in vitro or immediately autotransplanted thyroid autografts. Satisfactory results were obtained, however, the number of these studies and the number of patients per each study was very low. Besides the study methodologies were not so consistent.

Nω-Nitro-L-Arginine Methylester Ameliorates Myocardial Toxicity Induced by Doxorubicin

( Mahmoud Ahmed Mansour ),( Ayman Gamal El Din ),( Mahmoud N. Nagi ),( Othman A. Al Shabanah ),( Abdullah M. Al Bekairi ) 생화학분자생물학회 2003 BMB Reports Vol.36 No.6

The effects of No-nitro-L-arginine methylester (L-NAME) and L-arginine on cardiotoxicity that is induced by doxorubicin (Dox) were investigated. A single dose of Dox 15mgkg i.p. induced cardiotoxicity, manifested biochemically by a significant elevation of serum creatine phosphokinase (CPK) activity [EC 2.7,3.2]. Moreover, cardiotoxicity was further confirmed by a significant increase in lipid peroxides, measured as malon-di-aldehyde (MDA) in cardiac tissue homogenates. The administration of L-NAME 4 mg/kg/d p.o. in drinking water 5 days before and 3 days after the Dox injection significantly ameliorated the cardiotoxic effects of Dox, judged by the improvement in both serum CPK activity and lipid peroxides in the cardiac tissue homogenates. On the other hand, the administration of L-arginine 70mg/kg/d p.o. did not protect the cardiac tissues against the toxicity that was induced by the Dox treatment. The findings of this study suggest that L-NAME can attenuate the cardiac dysfunction that is produced by the Dox treatment via the mechanism(s), which may involve the inhibition of the nitric oxide (NO) formation. L-NAME may, therefore, be a beneficial remedy for cardiotoxicity that is induced by Dox and can then be used to improve the therapeutic index of Dox.

Image Sequences Filtering Using a New Fuzzy Algorithm Based On Triangular Membership Function

Mahmoud Saeidi,Leila Chehreghani Anzabi,Mahmoud Khaleghi 보안공학연구지원센터(IJSIP) 2009 International Journal of Signal Processing, Image Vol.2 No.2

Effects of Dietary Lysine and Methionine Supplementation on Growth, Body Composition and Hematological Changes in Great Sturgeon ( Huso huso) Fed Soy Protein-based Diet

Mahmoud Mohseni,Mahmoud Bahmani,Mohammad Pourdeaghani,Jun-Young Bae,Jun-Ho Lee,Sungchul C. Bai 한국수산과학회 양식분과 2009 한국수산과학회 양식분과 학술대회 Vol.2009 No.7

Exact closed-form equations for internal forces functions of bridge-type structures

Mahmoud-Reza Hosseini-Tabatabaei,Mahmoud Reza Mollaeinia 국제구조공학회 2021 Structural Engineering and Mechanics, An Int'l Jou Vol.80 No.2

Influence lines and internal forces functions are vital tools for designing and monitoring engineering structures. This research explored a static method to derive exact closed-form equations for internal forces functions of bridge-type structures, continuous beams, and bridge frames, considering the bending flexibility. For this aim, first, we achieved member-end moment functions by applying the moment-rotation relationships in conjunction with the rotation propagation method. Then, substituting these functions into the static equilibrium equations provided the desired functions in terms of both the unit load and intended cross-section positions all over the structure, subjected to concentrated loads. Finally, the authors solved three illustrative examples to clarify the dominance of their suggested method for constructing both influence line and internal forces diagrams of statically indeterminate structures.

이집트 현대아랍시에 나타난 도시의 이미지에 관한 연구: 심장없는 도시를 중심으로

Mahmoud Ahmed Abd El Ghaffar 한국아랍어아랍문학회 2007 아랍어와 아랍문학 Vol.11 No.2

There can be no doubt that the image of the city in modern Egyptian poetry became the main theme, and started to play an important rhetoric role in poetic works during the Second World War period. As a result of the war, changes in the Arab world occurred not only in politics, economics, society and history, but also in literature. In the classical texts, such as those of Shawqi or Hafiz Ibraheem, the city was just the background, giving real historical meaning to the poem. It was a testimony of the relation between the poet and history on one side, and nature, the country, and the people on the other. In the romantic texts of Najy, Abou Shadi, and Mahmoud Hassan Ismaiel, it was an ugly and bad place compared with the beauty and the pureness of the countryside, but yet it was not the main theme in these poems. The romantic sorrow, nostalgia, vague metaphysical doubts and yearns, the sense of mystery in the universe, the idealization of women and love all became the common themes. With the realism of poetry from writers such as Hijazi, we can find in his first anthology “City without heart” that he has two views of the city. The first was a rejection of the city, hating everything that belongs to it. There were feelings of loneliness and unfamiliarity with its people, and a yearning to return to his village and be with the people there. The second was the development of a compromise with the city. The poet felt real love, with a woman, and with the country itself, so he started to accept the city, and through his growing acceptance, he managed to see the good side of the city alongside the bad.

On Testing Exponentiality Against HNRBUE Based on Goodness of Fit

Mahmoud, M.A.W.,Diab, L.S. The Korean Reliability Society 2007 International Journal of Reliability and Applicati Vol.8 No.1

Based on goodness of fit new testing procedures are derived for testing exponentiality against harmonic new renewal better than used in expectation (HNRBUE). For this aging properties, a nonparametric procedure (U-statistic) is proposed. The percentiles of this test statistic are tabulated for sample sizes n=5(1)30(10)50. The Pitman asymptotic efficiency (PAE) of the test is calculated and compared with, the (PAE) of the test for new renewal better than used (NRBU) class of life distribution [see Mahmoud et al (2003)]. The power of this test is also calculated for some commonly used life distributions in reliability. The right censored data case is also studied. Finally, real examples are given to elucidate the use of the proposed test statistic in the reliability analysis.

A Study about the Image of the City in the Modern Arabic Poetry in Egypt: "City without heart" as a model

( Mahmoud Ahmed Abd El Ghaffar ) 한국아랍어아랍문학회 2007 아랍어와 아랍문학 Vol.11 No.2

There can be no doubt that the image of the city in modern Egyptian poetry became the main theme, and started to play an important rhetoric role in poetic works during the Second World War period. As a result of the war, changes in the Arab world occurred not only in politics, economics, society and history, but also in literature. In the classical texts, such as those of Shawqi or Hafiz Ibraheem, the city was just the background, giving real historical meaning to the poem. It was a testimony of the relation between the poet and history on one side, and nature, the country, and the people on the other. In the romantic texts of Najy, Abou Shadi, and Mahmoud Hassan Ismaiel, it was an ugly and bad place compared with the beauty and the pureness of the countryside, but yet it was not the main theme in these poems. The romantic sorrow, nostalgia, vague metaphysical doubts and yearns, the sense of mystery in the universe, the idealization of women and love all became the common themes. With the realism of poetry from writers such as Hijazi, we can find in his first anthology "City without heart" that he has two views of the city. The first was a rejection of the city, hating everything that belongs to it. There were feelings of loneliness and unfamiliarity with its people, and a yearning to return to his village and be with the people there. The second was the development of a compromise with the city. The poet felt real love, with a woman, and with the country itself, so he started to accept the city, and through his growing acceptance, he managed to see the good side of the city alongside the bad.

Colorectal Cancer in the Kingdom of Saudi Arabia: Need for Screening

Mosli, Mahmoud H.,Al-Ahwal, Mahmoud S. Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8

Background and Objectives: Colorectal cancer (CRC) is a major health problem in the Kingdom of Saudi Arabia (KSA). Our aim was to characterize the epidemiology of CRC in the Saudi population. Design and Setting: Retrospective analysis of all cases of CRC recorded in the Saudi Cancer Registry (SCR) between January 2001 and December 2006 amongst Saudi citizens in KSA. Patients and Methods: Data were retrieved from the database of the SCR. Descriptive statistics was performed using SPSS. Results: A total of 4,201 cases of CRC were registered in the SCR. The incidence of CRC increased between 2001 and 2006. The mean age of patients at the time of diagnosis was 58 years; most patients were above 45 years of age (n=3322; 79.1%). At the time of diagnosis, 977 patients (23.0%) presented with localized disease and 1,018 (24.0%) had distant metastasis. The most frequent pathological variant was adenocarcinoma (73%), with grade 2 (moderately differentiated) being the most common grade among all variants (61%). For all cancer grades, the frequency of CRC was significantly higher among patients >45 years (P=0.004), who presented with more advanced disease (stages III and IV) (P=0.012). Based on logistic regression, age >45 years was associated with advanced regional presentation (P=0.001). Tumor grade was associated with advanced regional presentation and metastasis. Conclusions: There was an increase in the incidence of CRC between 2001 and 2006. The age at the time of diagnosis was low when compared with reports from developed countries. A nationwide approach is needed to encourage and illustrate the importance of screening programs.