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Search Results: 1 - 10 of 63 matches for " Elbachir Benjelloun "
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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.
Superior Mesenteric Arterial Embolism Associated with an Acute Limb Ischemia: A Case Report and Literature Review  [PDF]
Abdesslam Bouassria, Elbachir Benjelloun, Imane Kamaoui, Hicham Elbouhaddouti, Ouadii Mouaqit, Abdelmalek Ousadden, Khalid Mazaz, Khalid Ait Taleb, Laila Sedreddine, Mohammed El Abkari, SidiAdil Ibrahimi, Ihssane Mellouki
Open Journal of Gastroenterology (OJGas) , 2014, DOI: 10.4236/ojgas.2014.44027
Abstract: Introduction: Acute mesenteric ischemia due to an embolism of the superior mesenteric artery (SMA) is associated with a high mortality rate. Over twenty per cent of acute mesenteric embolism cases consist of multiple emboli. Case Presentation: We present a rare case of a 62-year-old man admitted with acute abdominal pain and signs of intestinal occlusion related to an acute mesenteric ischemia due to superior mesenteric arterial embolism. It was associated with a synchronous acute bilateral lower limb ischemia due to embolic arterial occlusion. He underwent an emergency explorative laparotomy with proximal jejunal resection, and the patient made an excellent recovery. As for the acute limb ischemia, it was treated by efficient anticoagulation allowing limb salvage. Conclusion: When treating a superior mesenteric arterial embolism, the possibility of recurrent or multiple arterial thromboembolic events should be considered. A prompt diagnosis, aggressive surgical treatment and intensive care could improve the prognosis.
About stock markets predictability
Hicham Benjelloun
Journal of Economics and Behavioral Studies , 2011,
Abstract: We argue that the financial markets have a predetermined outcome. They behave deterministically but appear to follow random patterns. Stock prices have nothing to do with future expectations; they are a reflection of previous convictions coming from the confident investors. A financial crisis is the result of the lack of confidence that characterizes a market moments before the crisis. Stocks returns are perfectly correlated to each other and it is possible to obtain high gains consistently. Finally we provide a different way of assessing risk and suggest a method to sense future performances.
Impacts des TIC sur l’enseignement et l’apprentissage des conceptions relatives au champ électrostatique en classes préparatoires aux grandes écoles d’ingénieurs (CPGE)
Abdelaziz Bouchaib,Nadia Benjelloun
Revue Internationale des Technologies en Pédagogie Universitaire , 2011,
Abstract: [Fran ais] Cet article décrit une séquence d’enseignement au cours de laquelle nous avons expérimenté les ressources numériques du site Université en Ligne (UeL), relatives au module d’électrostatique, avec des étudiants de la première année des classes préparatoires aux grandes écoles d’ingénieurs. Nous rappelons brièvement les difficultés conceptuelles rencontrées chez les étudiants de premier cycle universitaire dans le domaine de l’électrostatique. La description de la séquence, expérimentée durant trois années consécutives en deux versions, est suivie d’une analyse des perceptions des étudiants à propos du site UeL. Cette analyse montre que les étudiants sont largement satisfaits du contenu, de la clarté et de la motivation que le site procure dans l’apprentissage. Nous étudions ensuite l’apport de l’UeL sur les conceptions des étudiants participant à l’expérimentation à propos du champ électrostatique créé par une charge ponctuelle et du principe de superposition des champs créés par deux charges ponctuelles. Les résultats montrent que, lorsque les ressources de l’UeL sont intégrées en situation d’auto-apprentissage accompagné par un enseignant tuteur, elles permettent une bonne appropriation de ces concepts et une meilleure interprétation des situations utilisées comme instrument d’évaluation. [English] This article describes a teaching sequence in which we have experimented digital resources of “online university (UeL)” site related to Electrostatics module with students of the first year of preparatory classes for engineering schools. We briefly remind the conceptual difficulties faced by the first cycle university students in the domain of Electrostatics. The sequence description experienced during three consecutive years in two versions is followed by an analysis of students’ perception of UeL site. This analysis shows that students are widely satisfied of the content, clarity and motivation provided by this site towards learning. Then, we study the contribution of UeL to conceptions of students participating in the experiment of the Electrostatic field created by a point charge and of the superposition principle of fields created by two point charges. The results show that when UeL resources are integrated into self-learning situation accompanied with a tutor or a teacher, they permit a good appropriation of these concepts and a better interpretation of situations used as evaluation instrument.
Calcific Uremic Arteriolopathy in a Patient on Hemodialysis
Tarrass Faissal,Benjelloun Meryem
Saudi Journal of Kidney Diseases and Transplantation , 2008,
Abstract:
The Homogeneity Indicator of Learners in Project-based Learning
Benjelloun Touimi Yassine
Computer Science , 2014,
Abstract: The development of ICT has emerged a new way of learning using electronic platforms: E-learning. In addition, pedagogical approaches have been adopted in teaching based on group learning, such as the project-based teaching. The project-based teaching is an active learning method, based on group work to develop skills and acquire knowledge. However, the group of students is facing several challenges throughout the project, such as the decision-making group. The group decision generates convergences and divergences among members. Our approach in this article relates to the calculation of the homogeneity of a group of learners during decision making in an educational project.
Stochastic stability of linear time-delay system with Markovian jumping parameters
Benjelloun K.,Boukas E. K.
Mathematical Problems in Engineering , 1997,
Abstract: This paper deals with the class of linear time-delay systems with Markovian jumping parameters (LTDSMJP). We mainly extend the stability results of the deterministic class of linear systems with time-delay to this class of systems. A delay-independent necessary condition and sufficient conditions for checking the stochastic stability are established. A sufficient condition is also given. Some numerical examples are provided to show the usefulness of the proposed theoretical results.
Stochastic stability of linear time-delay system with Markovian jumping parameters
K. Benjelloun,E. K. Boukas
Mathematical Problems in Engineering , 1997, DOI: 10.1155/s1024123x97000525
Abstract:
A Framework of Vertebra Segmentation Using the Active Shape Model-Based Approach
Mohammed Benjelloun,Sa?d Mahmoudi,Fabian Lecron
International Journal of Biomedical Imaging , 2011, DOI: 10.1155/2011/621905
Abstract: We propose a medical image segmentation approach based on the Active Shape Model theory. We apply this method for cervical vertebra detection. The main advantage of this approach is the application of a statistical model created after a training stage. Thus, the knowledge and interaction of the domain expert intervene in this approach. Our application allows the use of two different models, that is, a global one (with several vertebrae) and a local one (with a single vertebra). Two modes of segmentation are also proposed: manual and semiautomatic. For the manual mode, only two points are selected by the user on a given image. The first point needs to be close to the lower anterior corner of the last vertebra and the second near the upper anterior corner of the first vertebra. These two points are required to initialize the segmentation process. We propose to use the Harris corner detector combined with three successive filters to carry out the semiautomatic process. The results obtained on a large set of X-ray images are very promising. 1. Introduction In some circumstances, it is not easy for humans to distinguish objects in X-ray images from their background. Developing algorithms and methods for obtaining a proper object extraction is one of the most important research topics in the image processing field. Computer-based image segmentation facilitates the domain expert work and can automate tasks dealing with interpretation of medical images. In this paper, we focus on vertebra segmentation applied to X-ray images. This operation is generally the first step to be performed before any disease diagnosis or vertebral mobility analysis. Therefore, this segmentation process is an essential and critical task. Indeed, the segmentation should be effective enough in order to analyze the mobility of the spinal column and accurately estimate the movement of each vertebra. The goal of the segmentation process is to exploit only the useful information for image interpretation. A wide variety of techniques and approaches have been proposed in the literature. We can cite active contours (or snake) which present a powerful method for edge extraction of objects having arbitrary shapes [1–3]. This approach has been investigated and applied in various ways in [4–6]. Another widely used approach is the level set-based methods which is a variation of the active contours approaches, [7]. These two methods have recently been used as new paradigms for a large number of segmentation methods due to their flexibility to deform the shape that must be detected. Nevertheless,
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