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Search Results: 1 - 10 of 1961 matches for " Khalid Mazine "
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A Rare Cause of Stomach Gangrene: Necrotizing Gastritis  [PDF]
Hicham El Bouhaddouti, Tarik Souiki, Khalid Mazine, Abdelmalek Ousadden, Khalid Mazaz, Khalid Ait Taleb
Open Journal of Gastroenterology (OJGas) , 2015, DOI: 10.4236/ojgas.2015.52002
Abstract: Necrosis of the stomach is rare. It occurs when there is vascular anomalies, gastric volvulus or her-niation and in infectious gastritis. We report a case in which infectious gastritis leads to a necrotiz-ing gastritis that is treated with urgent gastrectomy.
Hemobilia Due to an Iatrogenic Arteriobiliary Fistula Complicating Laparoscopic Cholecystectomy: A Case Report  [PDF]
Hicham El Bouhaddouti, Khalid Mazine, Abdesslam Bouassria, Ouadii Mouaqit, Elbachir Benjelloun, Abdelmalek Ousadden, Khalid Ait Taleb
Open Journal of Gastroenterology (OJGas) , 2014, DOI: 10.4236/ojgas.2014.46040
Abstract: Hemobilia is the result of a pathological communication between bile duct and intra or extrahepatic vessel. 40% to 60% of the haemobilia cases are Iatrogenic, and the other causes are either vascular malformations or hepatic blunt trauma. We describe the case history of a patient in which laparoscopic cholecystectomy was complicated 3 months later by massive hemobilia. The cause of haemorrhage was a fistula between the principal bil duct and the right hepatic artery. This complication was successfully managed by surgery and angiographic embolization with full recovery of the patient.
Surgical Bypass versus Endoscopic Stenting for Unresectable Head Pancreatic Cancer, Which Palliative Treatment Is Better in Developing Countries, Morocco as an Example  [PDF]
Khalid Mazine, Hamdaoui Mohammed, El Ghazi Karima, Ousadden Abdelmalek, Mazaz Khalid, Ibrahimi Adil, Ait Taleb Khalid, Benajeh Dafrallah, Benjelloun Elbachir
Open Journal of Gastroenterology (OJGas) , 2017, DOI: 10.4236/ojgas.2017.75017
Abstract: Background: Metal stents for unresectable pancreatic cancer are associated with longer patency and superior cost-effectiveness. However, they are too expensive to be recommended routinely in developing countries. Moreover, a debate on outcome results in these patients who receive plastic biliary endoprothesis versus surgical bypass as palliation of obstructive jaundice. We aimed to compare retrospectively the outcomes in patients treated with plastic stent or surgical bypass as a palliative option for these patients. Patients and Methods: We have examined data for patients (n = 86) who received endoscopic stenting (n = 64) or surgical bypass (n = 22), from January 2013 to November 2016, as a palliative treatment for obstructive jaundice from inoperable cancer head pancreas. Results: Serum bilirubin and CA19.9 levels were comparable in age and gender matched patient groups. Moreover, post-operative major complications and 30-days mortality showed no significant differences among patient groups. However, surgical bypass treated patients showed longer initial hospital stay (9 vs. 6 days, p = 0.014), higher cost ($1600 vs. $1088) and longer survival (192 vs. 101 days, p = 0.003) compared to endoscopy-stenting treated patients. Re-hospitalization was required for 5 stented patients (averaged $448). Conclusion: Biliary bypass surgery for unresectable pancreatic cancer may improve patient survival, although prolongs hospital stay. It may be recommended for relatively fit patients with a life expectancy of 6 months and more.
Three new species of Eugenia sect. Racemosae (Myrtaceae) from the cerrados of the state of Mato Grosso, Brazil
Mazine, Fiorella Fernanda;Souza, Vinicius Castro;
Brazilian Journal of Botany , 2010, DOI: 10.1590/S0100-84042010000200009
Abstract: three new species of eugenia sect. racemosae (myrtaceae) from cerrado vegetation of central region in brazil are described and illustrated. they are: eugenia hatschbachii mazine, eugenia mattogrossensis mazine and eugenia glabrescens mazine. data on the geographic distribution and habitat are given for the new taxa.
An Application of Cyclotomic Polynomial to Factorization of Abelian Groups  [PDF]
Khalid Amin
Open Journal of Discrete Mathematics (OJDM) , 2011, DOI: 10.4236/ojdm.2011.13017
Abstract: If a finite abelian group G is a direct product of its subsets such that G = A1···Ai···An, G is said to have the Hajos-n-proprty if it follows that one of these subsets, say Ai is periodic, meaning that there exists a nonidentity element g in G such that gAi = Ai . Using some properties of cyclotomic polynomials, we will show that the cyclic groups of orders pα and groups of type (p2,q2) and (pα,pβ) where p and q are distinct primes and α, β integers ≥ 1 have this property.
Changes in the Shoreline Position Caused by Natural Processes for Coastline of Marsa Alam – Hamata, Red Sea, Egypt  [PDF]
Khalid Dewidar
International Journal of Geosciences (IJG) , 2011, DOI: 10.4236/ijg.2011.24055
Abstract: The probability of storms and ice-drift events and their impact on coasts is expected to increase as result of climate change. Multi-years shoreline mapping is considered a valuable task for coastal monitoring and assessment. This paper presents shoreline maps illustrating the shoreline erosion accretion pattern in the coastal area between Marsa Alam – Hamata of Red Sea coastline by using different sources of remote sensing data. In the present study, Landsat MSS (1972), Landsat TM (1990), Landsat ETM+ (1998, 2000) and Terra Aster (2007) satellite images were used. In this study, two techniques were used to estimate rate of shoreline retreat. The first technique is corresponding to the formation of automated shoreline positions and the second one is for estimating rate of shoreline change based on data of remote sensing applying Digital Shoreline Analysis System (DSAS) software. In this study, the End Point Rate (EPR) was calculated by dividing the distance of shoreline movement by the time elapsed between the earliest and latest measurements at each transect. Alongshore rate changes shows that there are changes of erosion and accretion pattern due to coastal processes and climate changes.
Simulation of Average Turbulent Pipe Flow: A Three-Equation Model  [PDF]
Khalid Alammar
Open Journal of Fluid Dynamics (OJFD) , 2014, DOI: 10.4236/ojfd.2014.41005
Abstract: The aim of this study is to evaluate a three-equation turbulence model applied to pipe flow. Uncertainty is approximated by comparing with published direct numerical simulation results for fully-developed average pipe flow. The model is based on the Reynolds averaged Navier-Stokes equations. Boussinesq hypothesis is invoked for determining the Reynolds stresses. Three local length scales are solved, based on which the eddy viscosity is calculated. There are two parameters in the model; one accounts for surface roughness and the other is possibly attributed to the fluid. Error in the mean axial velocity and Reynolds stress is found to be negligible.
An Updated Review on Chicken Eggs: Production, Consumption, Management Aspects and Nutritional Benefits to Human Health  [PDF]
Khalid Zaheer
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.613127
Abstract: Ancestors of the modern chicken were domesticated from members of the Gallus genus probably 7 to 8 thousand years ago in southeastern Asia. Subsequently, they spread globally for meat and egg production. In the chicken egg, there is a balance of numerous, high-quality nutrients, many of which are highly bioavailable. The egg confers a multitude of health benefits to consumers emphasizing its classification as a functional food. Current global per capita egg consumption estimates approach 9 kg annually but vary greatly on a regional basis. This review deals with global production, consumption, and management aspects such as hygiene, feeding, and housing. Management aspects play key roles in the composition, quality, food safety, and visual (consumer) appeal of the egg. Also the manipulation of egg nutrients and value for human health is discussed.
Engaging Aerospace Students Using Interactive Web-Based Techniques  [PDF]
Adeel Khalid
Advances in Aerospace Science and Technology (AAST) , 2016, DOI: 10.4236/aast.2016.11001
Abstract: Most engineering courses require some level of work to be done by students using internet. A vast majority of material taught in classes is available online. Theoretically, a student could learn almost everything they want from the online resources. In this research, a comparative study is done between students learning and understanding when some basic aerospace concepts are taught in a traditional lecture based classroom versus when students are told to look for the same material on the internet. The results indicate that, although all the material taught in the classroom is available on the internet, students do not perform better when they exclusively use internet for learning. However a traditional lecture based class coupled with internet resources yields the favourable results.
Advances in MIMO Techniques for Mobile Communications—A Survey  [PDF]
Farhan Khalid, Joachim Speidel
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.33031
Abstract: This paper provides a comprehensive overview of critical developments in the field of multiple-input multiple-output (MIMO) wireless communication systems. The state of the art in single-user MIMO (SU-MIMO) and multiuser MIMO (MU-MIMO) communications is presented, highlighting the key aspects of these technologies. Both open-loop and closed-loop SU-MIMO systems are discussed in this paper with particular emphasis on the data rate maximization aspect of MIMO. A detailed review of various MU-MIMO uplink and downlink techniques then follows, clarifying the underlying concepts and emphasizing the importance of MU-MIMO in cellular communication systems. This paper also touches upon the topic of MU-MIMO capacity as well as the promising convex optimization approaches to MIMO system design.
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