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Search Results: 1 - 10 of 15765 matches for " Mariam Almadi Mohammed Mu’lla "
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An Algorithm for the Derivative-Free Unconstrained Optimization Based on a Moving Random Cone Data Set  [PDF]
Mariam Almadi Mohammed Mulla
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105652
Abstract:
In this paper, we suggest and analyze some new derivative free iterative methods for solving nonlinear equation using a trust-region method. We also, give several examples to illustrate the efficiency of these methods. Comparison with other similar method is also given. This tech-nique can be used to suggest a wide class of new iterative methods for solving optimization problem. For, solving linearly unconstrained optimi-zation problems without derivatives, a derivative-free Funnel method for unconstrained non-linear optimization is proposed. The study presents new interpolation-based techniques. The main work of this paper depends on some matrix computation techniques. A linear system is solved to obtain the required quadratic model at each iteration. Interpolation points are based on polynomial which is then minimized in a trust-region.
Experimental Report on Setting up a Cloud Computing Environment at the University of Bradford
Bashir Mohammed,Mariam Kiran
Computer Science , 2014,
Abstract: Cloud computing is increasingly attracting large attention in computing both in academic research and in industrial initiatives. Emerging as a popular paradigm and an attractive model of providing computing, information technology (IT) infrastructure, network and storage to large and small enterprises both in private and public sectors. This project was initiated and aimed at designing and Setting up a basic Cloud lab Testbed running on Open stack under Virtual box for experiments and Hosting Cloud Platforms in the networking laboratory at the University of Bradford. This report presents the methodology of setting up a cloud lab testbed for experiment running on open stack. Current resources, in the Networking lab at the university were used and turned into virtual platforms for cloud computing testing. This report serves as a practical guideline, concentrating on the practical infrastructure related questions and issues, on setting up a cloud lab for testing and proof of concept. Finally the report proposes an experimental validation showing feasibility of migrating to cloud. The primary focus of this report is to provide a brief background on different theoretical concepts of cloud computing, particularly virtualisation, and then it elaborates on the practical aspects concerning the setup and implementation of a Cloud lab test bed using open source solutions. This reports serves as a reference for institutions looking at the possibilities of implementing cloud solutions, in order to benefit from getting the basics and a view on the different aspects of cloud migration concepts.
Pulmonary hydatid cyst in a pregnant patient causing acute respiratory failure
Hijazi Mohammed,Al-Ansari Mariam
Annals of Thoracic Medicine , 2007,
Abstract: A 21-year-old primigravida, at 32 weeks of gestation, presented with acute onset of respiratory failure and circulatory shock. Chest imaging showed findings suggestive of ruptured hydatid cyst, which was confirmed by histology post-thoracotomy. Tissue cultures from the removed cyst grew Mycobacterium tuberculosis also. She was successfully managed in the intensive care unit and was then discharged home on antituberculosis medications in addition to albendazole after prolonged hospitalization and a need for chest tube for bronchopleural fistula. Acute respiratory failure and anaphylactic shock secondary to ruptured pulmonary hydatid cyst and superimposed pulmonary tuberculosis in a pregnant lady should be considered in patients living in endemic areas.
Protocol-driven vs. physician-driven electrolyte replacement in adult critically ill patients
Hijazi Mohammed,Al-Ansari Mariam
Annals of Saudi Medicine , 2005,
Abstract: BACKGROUND : The intensive care unit is a dynamic environment, where high numbers of patients cared for by health care workers of different experiences and backgrounds might result in great variability in patient care. Protocol-driven interventions may facilitate timely and uniform care of common problems, like electrolyte disturbances. We prospectively compared protocol-driven (PRD) vs. physician-driven (PHD) electrolyte replacement in adult critically ill patients. PATIENTS AND METHODS : In the first month of the two-month study, potassium, magnesium, and phosphate levels were checked by a physician before ordering replacement (PHD replacement period). Over the second month, ICU nurses proceeded with replacement according to the protocol (PRD replacement period). We collected demographic data, admission diagnosis, number of potassium, magnesium, and phosphate levels done per day, number of low levels per day, number of replacements per day, time between availability of results to ordering replacement, time to starting replacement, post-replacement levels, serum creatinine, replacement dose, arrhythmias and replacement route. RESULTS : During the PHD replacement period, 43 patients meeting the inclusion criteria were admitted to the ICU, while 44 were admitted during the PRD month. The mean time (minutes) from identifying results to replacement of potassium, phosphate and magnesium was significantly longer with PHD replacement compared with PRD replacement (161, 187, and 189 minutes vs. 19, 26, and 19 minutes) ( P < 0.0001). The number of replacements needed and not given was also significantly lower in the PRD replacement period compared with the PHD replacement period (2, 4, and 0 compared with 9, 6 and 0) ( P < 0.05). No patients had high post-replacement serum concentrations of potassium, phosphate or magnesium. CONCLUSIONS : This study shows that a protocol-driven replacement strategy for potassium, magnesium and phosphate is more efficient and as safe as a physician-driven replacement strategy.
Thymoquinone Suppresses Cellular Proliferation, Inhibits VEGF Production and Obstructs Tumor Progression and Invasion in the Rat Model of DMH-Induced Colon Carcinogenesis  [PDF]
Wasfi Asfour, Sawsan Almadi, Lina Haffar
Pharmacology & Pharmacy (PP) , 2013, DOI: 10.4236/pp.2013.41002
Abstract: A myriad of medicinal effects has been attributed to Thymoquinone (TQ), the major biological-active component of Nigella sativa. TQ has been shown to exhibit potent anti-tumor activities. The present work was undertaken to further explore TQ’s chemopreventive efficacy against 1, 2-dimethylhydrazine (DMH)-induced colon carcinogenesis in the rat model through a two-phase study (initiation and post-initiation) and to evaluate its potential impact on tumor progression and invasion in vivo. TQ treatment in the initiation phase significantly reduced tumor incidence, multiplicity and mean tumor volume. However, although mean tumor volume and multiplicity were decreased upon TQ treatment in the post-initiation phase, TQ did not reduce incidence significantly. Cellular proliferation, as assessed by expression of colonic PCNA, was shown to be inhibited in consequence to TQ treatment in both phases, with a more pronounced reduction in the initiation phase. In addition, our results demonstrated an appreciable negative impact of TQ on vascular endothelial growth factor (VEGF) production in tumor-bearing rats. Furthermore, we provided evidence that TQ-treatment, in both phases, tended to considerably suppress tumor progression and invasion. Taken together, the present study demonstrated that TQ, at an orally daily dose of 10 mg/kg, has a chemopreventive effect in the initiation phase, and has the potential to attenuate tumor burden, suppress progression of pre-neoplastic lesions and to inhibit tumor growth in the post-initiation phase of DMH-induced colon carcinogenesis, We surmise that such effects of TQ may be due to suppression of cellular proliferation and inhibition of VEGF production. The results could provide an effective chemopreventive approach in the primary prevention of colon cancer in humans in the next future, and illuminate a promising horizon to combat progression of benign colonic pre-neoplastic lesions into malignant metastatic tumors and to manage colon cancer.
Ethanolic Extract of Nigella sativa Seeds Lacks the Chemopreventive Efficacy in the Post Initiation Phase of DMH-Induced Colon Cancer in a Rat Model  [PDF]
Wasfi Asfour, Sawsan Almadi, Lina Haffar
Pharmacology & Pharmacy (PP) , 2013, DOI: 10.4236/pp.2013.42031
Abstract:

Nigella sativa, belonging to the Ranunculacea family, is a versatile phytochemical mine bestowed with multi-dimensional medicinal effects. The current study was performed to investigate the chemopreventive efficacy, if any, of the ethanolic extract of indigenous Nigella sativa seeds (ENS) and to evaluate its potentials on tumor progression during the initiation and post initiation phases of Dimethylhydrazine-induced colon carcinogenesis in a rat model. ENS treatment during the initiation phase unveiled chemopreventive effect manifested by significant reductions in tumor incidence, multiplicity and tumor volumes. Histopathological findings and modified Duke’s classification of tumors provided evidence that ENS, administered in the initiation phase, is capable of delaying progression, restricting invasion and attenuating aggressiveness of colon tumors. These results imply that ENS may be a promising candidate in the primary prevention of colon cancer. On the contrary, we demonstrated that ENS lacked chemopreventive and tumorigenesis inhibitory effects in the post initiation phase. We speculate that the chemopreventive effect of ENS might be due to the synergistic actions of various constituents present in the extract. However, extensive studies are warranted and more efforts need to be dedicated to fractionate, analyze and to further appraise the anticancer effect of ENS before any definitive conclusions can be drawn.

Evaluation of Causes of Retaining Wall Failure
Mu'azu Mohammed ABDULLAHI
Leonardo Electronic Journal of Practices and Technologies , 2009,
Abstract: Retaining structures are vital geotechnical structure, because the topography of the earth surface is a combination of plain, sloppy and undulating terrain. The retaining wall resists thrust of a bank of earth as well as providing soil stability of a change of ground elevation. Earth pressures on retaining wall are designed from theories of Soil Mechanics, but unfortunately the engineers using them do not always realize the significance of the assumption in their development. This is usually accompanied by with failure and partial failures because of designed based on rules and formulae that fit only limited conditions. In addition there are also problems of using bad backfill materials without taking precautionary measures against built–up of hydrostatic pressure by provision of drainage and also poor workmanship.
Influence of Compactive Effort on Bagasse Ash with Cement Treated Lateritic Soil
Mohammed Abdullahi MU'AZU
Leonardo Electronic Journal of Practices and Technologies , 2007,
Abstract: The result of a laboratory study on the influence of British Standard Light (BSL), West African Standard (WAS) and British Standard Heavy (BSH) compactive effort on up to 8% bagasse ash content with up to 4% cement treated lateritic soil on compaction and shear strength characteristic of laterite. The result shows decreased in Maximum Dry Density with increased in bagasse ash content and in shear strength properties there was decreased in cohesion and an increased in angle internal friction. The decreased was greater with higher bagasse ash content. However, as compactive effort increased from BSL, WAS and BSH, the value of MDD increased and OMC decreased as a result of flocculation and agglomeration of clay particle occupying larger space with a corresponding drop in dry density and because of extra water required for the pozzalanic reaction of bagasse ash and hydration of cement respectively.
Evaluation of Plasticity and Particle Size Distribution Characteristics of Bagasse Ash on Cement Treated Lateritic Soil
Mohammed Abdullahi MU'AZU
Leonardo Journal of Sciences , 2007,
Abstract: Lateritic soil was treated with 1-4% cement contents and was admixtured with 2-8% bagasse ash content. The paper evaluated the plasticity and particle size distribution characteristic of bagasse ash on cement treated laterite. It was observed that liquid limit and plasticity index reduced while plastic limit increased. As regards the particle size distribution, the was reduction in the percentage of fines as a result of formation of heavier pseudo- and particle with percentage passing BS Sieve No. 200 reduced from 63% to almost zero. However the recommended percentage of bagasse ash should be between 4%-6%.
Clinical review: Percutaneous dilatational tracheostomy
Mariam A Al-Ansari, Mohammed H Hijazi
Critical Care , 2005, DOI: 10.1186/cc3900
Abstract: Tracheostomy is one of the oldest surgical procedures, described in ancient books of medicine [1]. The standard operative tracheostomy technique presented by Jackson [2] remains little changed more than 100 years on. Several tracheostomy techniques have been described as percutaneous [3,4]. A technique of performing percutaneous dilatational tracheostomy (PDT) over a guidewire was first described by Ciaglia in 1985. It is increasingly being performed in intensive care units (ICUs) at the bedside. The Ciaglia technique, including its modifications, has become the most widely used procedure for the performance of PDT.In the first part of this review we consider general issues related to PDT. In the second section we focus on evidence-based recommendations, using the best available evidence, regarding issues such as modifications to PDT procedures designed to enhance patient safety and timing of performance in the ICU [5]. We conducted searches of Medline, the National Electronic Library for Health, the Cochrane Database of Systematic Reviews and the TRIP Database for reports published between 1985 and 2005, using the following key words: 'percutaneous', 'tracheostomy' and 'intensive care units'. Evidence is weighted according to the following rating scheme: A = scientific evidence provided by randomized and nonrandomized trials with statistically significant results; B = scientific evidence provided by observational studies or by controlled trials; and C = expert opinion with lack of scientific evidence.Various types of PDT techniques are available. They all require puncture of the trachea and insertion of a guidewire into the trachea. The puncture should be performed between the first and second or between the third and fourth tracheal rings. There is some evidence that a puncture between the third and fourth tracheal rings is associated with the lowest rate of accidental injury to aberrant vessels and other structures if there are anatomical abnormalities [6]. In mo
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