Khader M.M.,Islamic University |
Khader M.M.,Benha University
Journal of Computational Physics | Year: 2013
In this article, an accurate numerical approach is introduced. In this approach we mixed between the fractional finite difference method and the restrictive Taylor approximation (RTA). The proposed method is implemented to solve numerically the perturbed fractional partial differential equations (FPDEs). Special attention is given to study the stability and consistency of the method by means of Gerschgorin theorem and using the stability matrix analysis. Two numerical examples are given and compared with the exact solution. © 2013 Elsevier Inc.
Saleh F.,Islamic University
BMC complementary and alternative medicine | Year: 2014
Cancer immunotherapy requires proper manipulation of the immune system, lymphocytes in particular, in order to identify and destroy the cancer cells as non-self. In this study we investigated the effect of the flavonoid present in green tea, namely epigallocatechin-3-gallate (EGCG), on the proliferation of, and IFN-γ production by, peripheral blood mononuclear cells (PBMC) from breast cancer patients stimulated with a mitogen, anti-CD3 and the common breast cancer peptides Her-2/neu, and p53. Blood samples were collected from 25 patients with breast cancer at the Kuwait Cancer Control Centre (KCCC). The patients were newly diagnosed, and had not undergone any treatment or surgery at the time of sample collection. The control group consisted of 25 healthy women age-matched (±5 years) to the patients. PBMC were isolated from the patients and controls, and were cultured separately with the mitogen PHA, anti-CD3 antibodies, and Her-2/neu and p53 in the presence or absence of standardized doses of EGCG. The degree of proliferation and interferon-γ [IFN-γ) release were then analyzed. EGCG significantly suppressed the proliferation of PBMC in response to stimulation separately with (i) the mitogen, (ii) anti-CD3, and (iii) the cancer antigen peptides. IFN-γ production was also significantly suppressed by EGCG in vitro. EGCG appears to have an immunosuppressive effect on the proliferation of PBMC, indicating that EGCG is worth exploring for immunomodulatory effects in autoimmune diseases and tissue transplantation.
Mostafa Kamal S.M.,Islamic University
Journal of Health, Population and Nutrition | Year: 2013
In Bangladesh, preference for place of delivery and socioeconomic factors associated with caesarean section are not well-understood. This paper examines the socioeconomic correlates of preference for institutional delivery and caesarean sections in Bangladesh. The study used data from the nationally-representative 2007 Bangladesh Demographic and Health Survey. Both bivariate and multivariate binary logistic regression models were constructed to assess the effect of sociodemographic factors on the use of medical facilities and caesarean section for childbirth. Overall, 15% of women underwent institutional delivery, and 8% deliveries were performed by caesarean sections. Both institutional deliveries and caesarean sections have increased in recent years. The bivariate and multivariate analyses both confirmed that place of residence, religion, birth order, frequent pregnancy, antenatal care-seeking, and wealth index were important predictors of the use of medical facilities and caesarean sections for childbirth. Women's education appeared as the most single significant determinant for the use of both services. The findings underlie the importance of monitoring caesarean section as well as professional attendance for safe motherhood. Programmes should aim to inform women highlighting the benefits of the use of skilled maternal healthcare services and demerits of home-delivery practices. © INTERNATIONAL CENTRE FOR DIARRHOEAL DISEASE RESEARCH, BANGLADESH.
Rahman S.,Islamic University |
Islam R.,Islamic University
Cell Communication and Signaling | Year: 2011
Sirt1 (member of the sirtuin family) is a nicotinamide adenosine dinucleotide (NAD)-dependent deacetylase that removes acetyl groups from various proteins. Sirt1 performs a wide variety of functions in biological systems. The current review focuses on the biological functions of Sirt1 in obesity-associated metabolic diseases, cancer, adipose tissue, aging, cellular senescence, cardiac aging and stress, prion-mediated neurodegeneration, inflammatory signaling in response to environmental stress, development and placental cell survival. © 2011 Rahman and Islam; licensee BioMed Central Ltd.
Berrada K.,Islamic University
Annals of Physics | Year: 2014
Robustness of the geometric phase (GP) with respect to the environmental effects is a basic condition for an effective quantum computation. Here, we study quantitatively the GP of a two-level atom system driven by a phase noise laser under non-Markovian dynamics in terms of different parameters involved in the whole system. We find that with the change of the damping coupling, the GP is very sensitive to its properties exhibiting long collapse and revival phenomena, which play a significant role in enhancing the stabilization and control of the system dynamics. Moreover, we show that the GP can be considered as a tool for testing and characterizing the nature of the qubit-environment coupling. Due to the significance of how a system is quantum correlated with its environment in the construction of a scalable quantum computer, the entanglement dynamics between the qubit with its environment under external classical noise is evaluated and investigated during the time evolution. © 2013 Elsevier Inc.
Khater M.A.,Islamic University
Spectrochimica Acta - Part B Atomic Spectroscopy | Year: 2013
The development of a direct, rapid, and sensitive spectroscopic method for the analytical quantification of light (low atomic number) elements represents an important ongoing challenge. For the first time, we review the evolution of laser-induced breakdown spectroscopy (LIBS) technique for trace analysis of light elements in steels. We present studies carried out in both far/vacuum UV and UV-visible spectral regions, and focus on the elements carbon, sulfur, phosphorous, and nitrogen as their presence and content determine key properties of all steel products. In order to facilitate tracking down the evolution of the technique for a particular element/matrix, the review is organized in such a way that a chronological order has always been obeyed. Moreover, important information regarding characterization of a specific element in a given steel sample is tabulated, so that interested readers can easily locate relevant resources. Furthermore, typical examples of recent developments and advances in terms of LIBS instrumentation and systems regarding light elements in steels are summarized. Finally, the article suggests in brief some approaches for further raising the analytical capability and figures of merit of LIBS regarding trace compositional analysis of light elements. In this respect, we suggest combining LIBS with recently developed diode laser-based techniques such as DLIFS and DLAAS. © 2012 Elsevier B.V. All rights reserved.
Al-Homood I.A.,Islamic University
Rheumatology (United Kingdom) | Year: 2014
Adult-onset Still's disease (AOSD) is a systemic inflammatory disorder that is a diagnosis of exclusion. It is characterized by high spiking fevers, arthritis or arthralgia, and an evanescent salmon-coloured rash. Many other systemic manifestations and laboratory test abnormalities may occur. Biologic drugs, TNF-α inhibitors, and IL-1 and IL-6 blockers have been used for the treatment of patients with AOSD refractory to conventional treatment or those with life-threatening manifestations aiming for better disease control. Data on biologic treatments in AOSD are limited and consist mainly of case reports, small case series and retrospective studies. Using biologic agents (anti-TNF-α, anti-IL-1 and anti-IL-6) with traditional immunosuppressive drugs resulted in significant improvement of disease outcomes. IL-1 and IL-6 inhibitors seem to be more efficient than TNF-α inhibitors. © The Author 2013. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved.
Khader M.M.,Islamic University
Journal of Computational and Nonlinear Dynamics | Year: 2013
In this paper, an efficient numerical method for solving the fractional delay differential equations (FDDEs) is considered. The fractional derivative is described in the Caputo sense. The proposed method is based on the derived approximate formula of the Laguerre polynomials. The properties of Laguerre polynomials are utilized to reduce FDDEs to a linear or nonlinear system of algebraic equations. Special attention is given to study the error and the convergence analysis of the proposed method. Several numerical examples are provided to confirm that the proposed method is in excellent agreement with the exact solution. Copyright © 2013 by ASME.
Chaudhary M.T.A.,Islamic University
Construction and Building Materials | Year: 2013
This paper presents application of Impact Echo (IE) technique for evaluation of unsound concrete in the anchorage zones of a post-tensioned (PT) slab in a high rise building. The L-shaped area where the problem occurred was located at the interface of prestressed concrete beams and a depressed floor slab. Single point IE evaluation was used as the Non-Destructive Testing (NDT) evaluation method due to its portability and recent success in similar applications. Repair scheme for the affected portions was devised based on the results of IE investigations. Majority (84%) of the tested locations were classified as Good or Fair and required no further investigation/repair. The remaining 16% of the locations that were identified as Questionable or Poor by IE testing were manually investigated by field chipping. These destructive field investigations revealed that the accuracy of fault prediction by single point IE method in the current application was around 60% for the points that were classified as Questionable/Poor. Adjustment to the commonly used geometric correction factor (K) in IE testing by ±5% improved this accuracy to 81%. This finding points to the need of adopting a revised geometric correction factor in IE testing of actual structural elements under field conditions.© 2013 Elsevier Ltd. All rights reserved.
News Article | February 27, 2017
Mossab Abo Toha (L) and his friend Shafi Salem, want to open the first English-language library in the beleaguered Palestinian territory (AFP Photo/MOHAMMED ABED) Gaza City (Palestinian Territories) (AFP) - Mossab Abu Toha has never actually left Gaza, instead devouring books as an escape. Now he is struggling to open the first English-language library in the beleaguered Palestinian territory. "Send us books in English, new or used," says the 24-year-old reading enthusiast on his Facebook page. Abu Toha, like so many Gazans effectively trapped in the Palestinian enclave by Israeli and Egyptian restrictions, dreams of travelling. "Freedom begins when one frees one's mind," said the young graduate in English literature from the Islamic University of Gaza, who shares his passion by teaching Shakespeare at a United Nations school. "I have read dozens of books in English, and with them I can travel to every country in the world and through all periods. I feel like I am in another world." Israel has maintained a blockade on Gaza for a decade, while the border with Egypt is also largely closed. Those who manage to take advantage of the rare Egyptian openings never really know when they will be able to return. In a territory where even the delivery of basic necessities is anything but simple, literature is also a victim of politics. "There are few books in English," Abu Toha said, and they "arrive well after their publication because of the blockade". Even the idea of falling back on electronic versions is problematic. "The electricity cuts all the time," said Shadi Salem, who is helping Abu Toha set up the project. Gaza receives only a few hours of power per day due to chronic energy shortages. Since the July launch of their "Library & Bookshop for Gaza" page, which has nearly 2,500 followers, the two friends say they have collected more than 200 books, including from American and European donors, as well as $2,000 (1,890 euros). But delivery has again been an issue. For months in 2016, Israel blocked the arrival of parcels into the Gaza Strip because they alleged its Islamist rulers Hamas were using it to send equipment for weapons. The transfer was restored in December, with Abu Toha announcing joyfully on Facebook: "You can now send your books." For the time being, the 200 books received and his personal library -- about 400 -- stand on shelves in the family home in Beit Lahia in northern Gaza. The goal is a thousand more books. Of all his books he highlighted three from American philosopher Noam Chomsky, who sent them to him personally. In 2014, the Israeli military launched its third assault on Gaza since Hamas came to power in 2007. Among the sites hit was the Islamic University, with its English bookshop badly damaged. "I was shocked: The Israeli army, backed by the West, bombed books in English," recalled the young man who sports a trim black beard. According to Mohammed al-Sherif of the Hamas-run culture ministry, around 30 libraries were partially or totally destroyed during the three wars. There are 18 libraries in Gaza, with the vast majority of books Arabic. "Israel has allowed books to be imported into Gaza for the past year, but political books, for example, are still banned," Sherif said.