7 results on '"Belhaj, Z."'
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2. The variational spline method for solving Troesch’s problem
- Author
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Kouibia, A., Pasadas, M., Belhaj, Z., and Hananel, A.
- Published
- 2015
- Full Text
- View/download PDF
3. The variational spline method for solving Troesch’s problem
- Author
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Kouibia, A., primary, Pasadas, M., additional, Belhaj, Z., additional, and Hananel, A., additional
- Published
- 2014
- Full Text
- View/download PDF
4. Optimal usage of FujiFilm's supply chain
- Author
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Belhaj, Z., Flapper, Simme Douwe P., Dellaert, Nico P., Luijten, J., Pierens, Rob, and Industrial Engineering and Innovation Sciences
- Abstract
The following report presents the results of the logistics design project carried out in FujiFilm B.V. in the plant of PS-plates (P3) in Tilburg. The project was conducted from September 2008 to July 2009. FujiP3, one of the most important production units of FujiFilm, manufactures and sells aluminium pre-sensitized plates called PS-plates, in a very competitive and dynamic market. The unit is undergoing some important changes with the objective of solving two major problems faced by the company; long lead times and high stock levels. These changes include providing a service level of 96%, the reorganization of the material flow, the designation of the warehouses capacities and the reorganization of the finishing plant. This will have a significant impact on the future operations, and requires the definition of new procedures and ways of working. The company has a make-to-order production system which provides a very broad assortment of finished products with a high level of efficiency. The production process is completed in two phases: the processing phase and the finishing phase. In the processing phase the aluminium is coated with chemicals and cut into master sheets. These master sheets are cut and packed in the second phase. The production planning has a strong focus on minimizing the material losses since material costs are the main determinant of the cost price of PS-plates. This project has the objective to reduce the customer lead time to 4 weeks at minimum overall costs while maintaining 96% delivery reliability. The asssignment of this project is to design and implement a logistic control system for FujiP3, in the form of operational procedures at higher levels and to define a model which can describe different scenarios by varying different sensitivity parameters. An optimal logistics design has to be defined by determining lot sizes, commonalities in terms of master sheets and by allocating the capacities. To achieve the objectives we proceed in four steps. The first step is to redefine the position of the customer order decoupling point and to classify the products into four classes. At the higher planning level, the products are classified by considering the product life stage, the cost reductions in the supply chain, the risks incurred by FujiP3 and the technical characteristics of each product. Four classes were defined; A-items stocked as finished products, B1-items and B2-items as semi- finished products and C-items as raw material. Different strategies are chosen for each class of items. It is obvious that the make-to-order situation cannot provide the required lead time as the production lead time are bigger than desired lead time. The possible solution in the case of FujiFilm is to mix the make-to-order concept with the make-to-stock concept. This is due to the complexity of the product variant. Therefore, for each class we will usa a different concept. The second step involves the design of a suitable and efficient way to manage each of the product class. Inventory management and the production cycle times are the main aspects considered. Inventory of Master sheets is given special attention as the intermediate warehouses presents a bottleneck in the supply chain. An (R, S) control system is chosen to control the warehouses. The order--up-to-level and the safety stocks are calculated with especially programmed simulation model. The capacity coordination in the processing plant defines the number of setups per month and coordinates with the warehouses capacities. The third step is to analyze the requirement for the actual implementation of the design. Two aspects will be considered. The first aspect is the allocation of finished products to the master sheets and determines the required warehousing capacities. The second aspect is to analyze the effects of finishing lead time on the warehouses. We found that there is a real shortage in the warehousing capacities and high finishing lead time when the product has to be slit. The warehouses capacities are c considering different scenarios in the finishing plant and in the processing plant.The fourth step is to generate of procedures to keep the design updated an to determine the technical and the requirement for the feasibility of the project. And some recommendations are given for optimizing the production system.
- Published
- 2009
5. Tuberculome géant du cervelet simulant une tumeur maligne
- Author
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Aniba, K., Ghannane, H., Jalal, H., Belhaj, Z., Ousehal, A., Lmejjati, M., and Benali, S. Ait
- Published
- 2009
- Full Text
- View/download PDF
6. [Giant cerebellar tuberculoma mimicking a malignant tumor].
- Author
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Aniba K, Ghannane H, Jalal H, Belhaj Z, Ousehal A, Lmejjati M, and Benali SA
- Subjects
- Cerebellar Neoplasms diagnosis, Cerebellar Neoplasms pathology, Child, Diagnosis, Differential, Drug Therapy, Combination, Female, Humans, Magnetic Resonance Imaging, Medulloblastoma diagnosis, Medulloblastoma pathology, Treatment Outcome, Tuberculoma, Intracranial drug therapy, Antitubercular Agents therapeutic use, Tuberculoma, Intracranial pathology
- Abstract
Background: Isolated central nervous system (CNS) tuberculoma is rare. Central nervous system tuberculosis (TB) is associated with high morbidity and mortality despite modern methods of detection and treatment. The authors report a case of a giant cerebellar tuberculoma mimicking a malignant tumor and review the literature., Observation: A six-year-old girl, with no past medical history, vaccinated for her age, presented with a three-month history of occipitocervical cephalalgia, complicated by gait disturbances. The MRI showed a left cerebellar tumor suggestive of a medulloblastoma. At surgery, a nodular, avascular lesion was found and pathological examination confirmed tuberculoma. Intracranial tuberculoma is an uncommon variety of central nervous system tuberculosis. The prognosis is related to the rapidity of diagnosis, surgical resection and the complementary antituberculosis treatment., Conclusion: Intracranial tuberculoma is an uncommon variety of central nervous system infection. Prognosis is improved by a quick diagnosis, surgical removal, and associated antituberculoma therapy.
- Published
- 2009
- Full Text
- View/download PDF
7. [Personnel at risk for occupational blood exposure in a university hospital in West Algeria].
- Author
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Beghdadli B, Ghomari O, Taleb M, Belhaj Z, Belabed A, Kandouci del AK, and Fanello S
- Subjects
- Adult, Algeria, Female, Hospitals, University, Humans, Male, Needlestick Injuries epidemiology, Risk Factors, Blood, Health Personnel, Occupational Exposure
- Abstract
The accidental occupational exposure of health care workers to blood or other body fluids after skin injury or mucous contact, constitutes a risk for the transmission of the hepatitis B virus (HBV), hepatitis C virus (HCV) or human immunodeficiency viruses (HIV). This paper presents the results of a survey carried out over two years (January 2005 - December 2006) on reported occupational blood exposures (OBE). The study aimed to determine incidence, workers and professional categories at risk, and circumstances of OBE occurrence in order to identify avoidable cases and to orient prevention measures. Personal and professional data, immunization status, circumstances of OBE incidents, preventive measures, workers' behaviour post-exposure, and serology surveillance were collected. 108 exposures were reported by 70 women and 38 men. In total, 44 accidents were reported in 2005, and 64 in 2006. Needle stick injuries represented 81% of cases. Source patient serology was unknown in most of the cases, negative in 9% of cases and positive in 10% of cases. 62% of exposed health workers received immediate serology, follow up and screening as of the first day of exposure, 12% after 3 months and 36% after 6 months. No seroconversion case was noted. Cleaning staff and hygiene workers are at high risk of blood contamination as well as nurses, and more than one-third of injuries occurred because of mismanagement of healthcare waste produced in the hospital environment, where needles were not disposed of appropriately in a hard container. Thus, 41.66% of injuries could be avoided if objects were thrown away correctly in specific containers. It is urgent to raise awareness of health care personnel and strengthen adherence to standard precautions as well as to provide suitable containers for the collection and disposal of needles and sharp objects.
- Published
- 2009
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