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Management of Square Carcinoma of the Lower Lip Using Camille-Bernard Flap under Local Anesthesia: When Constraints Dictate Our Attitude

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Open Journal of Stomatology 2024年第4期14卷 191-197页

作者： Silly Toure Mouhamadou Makhtar Ndiaye Abibou Ndiaye Mame Sanou Diouf birame loum Baye Karim Diallo Department of Maxillofacial Surgery and Stomatology CHU Aristide Le Dantec of Dakar Dakar Senegal ENT Department Fann University Hospital Dakar Senegal

Introduction: Squamous cell carcinomas of the lip essentially pose a therapeutic management problem. In the West, their treatment is done under general anesthesia and follows the classic rules of oncology. In our context of exercise, we sometimes have a different attitude dictated by various constraints. Observation: 55-year-old patient with no notable history, seen in consultation for a very large ulcerative-budding lesion on the right 2/3 of the lower lip with mucocutaneous involvement without lymph node findings found on examination. Faced with this suspicious lesion and the patient’s financial difficulties, we decided to operate under local anesthesia to remove this tumor. The oncological excision was followed by immediate plasty using a Camille-Bernard flap with a good immediate aesthetic and functional result and postoperative day 7. The patient was unable to take his surgical specimen to anatomy-pathology and was lost to follow-up due to lack of financial resources. On anatomo-pathological analysis of the surgical specimen, the margins were healthy with confirmation of squamous cell carcinoma (anapathological reading made for scientific interest). Discussion: The particular mentality of certain patients and their difficult financial conditions push us to have an unconventional therapeutic attitude in oncology, but which nevertheless makes it possible to resolve certain problems that we often face. Local anesthesia is possible and realistic in cases like ours and the results can be acceptable and life-saving.

关键词： Squamous Cell Carcinoma Lower Lip Camille Bernard Flap Local Anesthesia

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Gallbladder Carcinoma of the Thyroid Revealed by an Acute Festered Thyroiditis: A Literature Study about a Case

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International Journal of Otolaryngology and Head & Neck Surgery 2023年第3期12卷 135-139页

作者： Aliou Faty Hady Tall Abdou Sy Fulgence Abdou Faye birame loum Kevin Dimitri Manfoumbi Manfoumbi ENT Department Diourbel Heinrich Lübke Regional Hospital Centre Diourbel Senegal ENT Department Saint-Louis Regional Hospital Centre Saint-Louis Senegal ENT Department Children’s Hospital of Diamniadio Dakar Senegal Department of Medecine Bambey Alioune Diop University’s Diourbel Senegal ENT Department H&#244pital Principal de Dakar Dakar Sénégal

The cutaneous extension of gallbladder thyroid carcinoma is uncommon and is among the aggressive forms of the disease. We are reporting the case of a woman of 54 that shows acute festered thyroiditis worsened by a necrotic ulcer wound on the skin lasting 3 weeks amid a big neglected hetero-multinodular goitre, evolving since 20 years. The anatomopathological test showed a gallbladder thyroid carcinoma of the thyroid with severe inflammation. The treatment consisted of a complete thyroidectomy with recurrent bilateral dredging. There was a favourable evolution. Gallbladder carcinoma, in its aggressive aspect, may be linked to the occurrence of acute festered thyroiditis. Therefore, the prognosis of our patient was favourable.

关键词： Thyroiditis Gallbladder Carcinoma Suppuration

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Thermal Modeling of a Multilayer Integrated LC Filter for Temperature Distribution Calculation

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Engineering（科研） 2019年第11期11卷 759-767页

作者： Somo Coulibaly Diby Kadjo Ambroise loum Georges Institut National Polytechnique UMRI EEA (LARIT-SISE) Yamoussoukro Ivory Coast Université Félix Houphouët-Boigny SSMT (LPMCT) Abidjan Ivory Coast

Thermal behavior of integrated passive components has become an important issue when designing these components. This paper presents the thermal modeling of a multilayer integrated LC filter used in DC-DC step-down converter for temperature distribution calculation. The approach used for this analysis is based on thermal equivalent circuit. Temperature distribution is obtained from algebraic equation, which is in vector and matrix form. The results of analytical calculation are compared with simulation results from finite element method. These results showed a good correlation.

关键词： Thermal Modeling Integrated LC Filter Temperature Distribution F. E. M. Simulation

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Unsupervised Segmentation Method of Multicomponent Images based on Fuzzy Connectivity Analysis in the Multidimensional Histograms

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Engineering（科研） 2011年第3期3卷 203-214页

作者： Sié Ouattara Georges Laussane loum Alain Clément 不详

Image segmentation denotes a process for partitioning an image into distinct regions, it plays an important role in interpretation and decision making. A large variety of segmentation methods has been developed;among them, multidimensional histogram methods have been investigated but their implementation stays difficult due to the big size of histograms. We present an original method for segmenting n-D (where n is the number of components in image) images or multidimensional images in an unsupervised way using a fuzzy neighbourhood model. It is based on the hierarchical analysis of full n-D compact histograms integrating a fuzzy connected components labelling algorithm that we have realized in this work. Each peak of the histo- gram constitutes a class kernel, as soon as it encloses a number of pixels greater than or equal to a secondary arbitrary threshold knowing that a first threshold was set to define the degree of binary fuzzy similarity be- tween pixels. The use of a lossless compact n-D histogram allows a drastic reduction of the memory space necessary for coding it. As a consequence, the segmentation can be achieved without reducing the colors population of images in the classification step. It is shown that using n-D compact histograms, instead of 1-D and 2-D ones, leads to better segmentation results. Various images were segmented;the evaluation of the quality of segmentation in supervised and unsupervised of segmentation method proposed compare to the classification method k-means gives better results. It thus highlights the relevance of our approach, which can be used for solving many problems of segmentation.

关键词： Multicomponent Images Unsupervised Segmentation n-D Histogram Fuzzy Connected Components Labelling n-D Compact Histogram Evaluation of Segmentation Quality

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Analysis of the Relevance of Evaluation Criteria for Multicomponent Image Segmentation

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Journal of Software Engineering and Applications 2011年第6期4卷 371-378页

作者： Sié Ouattara Georges Laussane loum Alain Clément Bertrant Vigouroux 不详

Image segmentation is an important stage in many applications such as image, video and computer processing. Generally image interpretation depends on it. The materials and methods used to demonstrate are described. The results are presented and analyzed. Several approaches and algorithms for image segmentation have been developed, but it is difficult to evaluate the efficiency and to make an objective comparison of different segmentation methods. This general problem has been addressed for the evaluation of a segmentation result and the results are available in the literature. In this work, we first presented some criteria of evaluation of segmentation commonly used in image processing with reviews of their models. Then multicomponent synthetic images of known composition are applied to these criteria to explore the operation and evaluate its relevance. The results show that choosing an assessment method depends on the purpose, however the criterion of Zeboudj appears powerful for the evaluation of region segmentations for properly separated classes, on the contrary the criteria of Levine-Nazif and Borsotti are adapted to the methods of classification and permit to build homogeneous regions or classes. The values of the Rosenbeger criterion are generally low and similar, so hard to make a comparison of segmentations with this criterion.

关键词： Quality of Segmentation Multicomponent Images Supervised and Unsupervised Evaluation Synthetic Images Metric

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Study of a Kit of GSM Radio Operator Site for Event-Driven Movable Coverage: Application to the Deployment of a Site of the Orange Operator in Ivory Coast

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International Journal of Communications, Network and System Sciences 2011年第11期4卷 744-755页

作者： Sié Ouattara Georges Laussane loum Koné Adama Alain Clément 不详

The mobile communication is nowadays one of the basic needs of humanity. It is essential to the flourishing of human beings. Considering this reality, the need to use its mobile phone is become more important and diversified. The subscribers of the various mobile telephone operators are increasingly demanding. This situation poses the problems of the cover mobile network to the operators and leads them to opt for several solutions and investments. The mobile operators in order to satisfy their customers use a policy of pushing the limits of network coverage in time and space for festive moments in targeted zones. Thus, we have conducted a study on the topic: study of a kit of GSM radio site for event-driven movable coverage. This work is applied to GSM (Global system mobile) network of the operator Orange-Ci, leader of mobile telephony in Ivory Coast. We thus proceeded under investigation initially of the various aspects of the ordinary sites (motionless radio site) which are already deployed with Orange-Ci in order to impregnate us infrastructures and equipment used. This study revealed us that a radio site comprises 4 parts: infrastructures, installations and energy equipments, installations and radio equipments, and installations and equipment of transmission. After the first analysis, we made a study of the movable site. The study of the movable site enabled us to see the various possible solutions to fulfill the basic functions of a movable radio site. After analysis we retained that our radio site will be built on a truck on which a mast of 25 m maximum length for the antennas will be embarked, it will be fed by a generator also embarked on the truck and the solution of transmission selected is the transmission by satellite more precisely technology VSAT. We choose the various equipments (radio, transmission, energy) according to features which we defined to constitute the kit of movable radio site.

关键词： Movable GSM Radio Site Deployment Kit Movable Coverage Even-Driven Generator Battery

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Effect of the Continuum Removal in Predicting Soil Organic Carbon with Near Infrared Spectroscopy (NIRS) in the Senegal Sahelian Soils

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Open Journal of Soil Science 2016年第9期6卷 135-148页

作者： Macoumba loum Mateugue Diack Ndeye Yacine Badiane Ndour Dominique Masse UFR de Sciences Agronomiques de l’Aquaculture et de Technologies Alimentaires Université Gaston Berger Saint-Louis Sénégal Institut Sénégalais de Recherches Agricoles Laboratoire LNRPV Dakar Sénégal IESOL Laboratoire Mixte International Ecologique des Sols Cultivés en Afrique de l’Ouest Centre ISRA/IRD Dakar Sénégal

Spectroscopy plays a major role in the access of the analytical parameters of the soil. It tends to substitute the conventional laboratory analysis because hyperspectral data were least expensive and easier to obtain. The objective of this study was to evaluate the effect of the continuum removal (CR) in the validation of the accurate prediction model of the soil properties with Vis-NIR spectroscopy data. Few studies using Vis-NIR reflectance spectroscopy have well focused the calculation of the CR method;its effect in the calibration of the accurate models was also not well emphasized. In this study, we used the remote sensing software ENVI 4.7 to compute the CR function where the value of the continuum for each sample and for each spectral wavelength was obtained by dividing the reflectance values of the full spectrum (FS) with those of the continuum curve (CC). The partial least square regression (PLSR) model was applied in the spectral data from the soil of the Senegal Sahelian region. It was calibrated with both data from the full spectrum (FS) and those obtained after the application of the continuum removal. With the application of the CR, ultraviolet wavelengths (350 - 429 nm) and those of near infrared (2491 - 2500 nm) were removed from the explanatory variables of PLSR model. With the FS, all wavelengths between 350 and 2500 nm were taken into account in predicting soil properties. Our findings show a positive effect of the application of CR in the estimation of soil organic carbon. In calibration, the R2 increased up to 10% with the continuum removal in the model of 12 components (CP). In terms of validation, it’s the 15-component model which is the most accurate with the same range in calibration between the FS and the CR. The lowest RMSE ranged from 0.04 with the FS to 0.03 with the application of the CR in calibration and validation. These results show that the interest of this study as soil organic carbon is recognized as a key indicator of fertility

关键词： NIRS Soil Proprieties Continuum Removal PLSR Model Senegal River Delta

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Sizing of a Filter (<i>L-C</i>) for a 180°Control Inverter Connected to a Medium Voltage Network

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Open Journal of Applied Sciences 2021年第5期11卷 565-576页

作者： Kouakou Fernand Koffi Gondo Yake Raymond Gbegbe Georges loum Olivier Asseu Institut National Polytechnique Félix Houphouë t Boigny (INP-HB) Yamoussoukro C&#244 te d’Ivoire Université Félix Houphouë t Boigny (UFHB) Abidjan C&#244 te d’Ivoire Ecole Supérieure Africaine des Technologies d’Information et de la Communication (ESATIC) Abidjan C&#244 te d’Ivoire

This paper studies the design and sizing of a filter (L-C) for an inverter with 180° control in Medium voltage (MV), based on formulas of the capacitance of the capacitor C and the inductance L of the filter (L-C) of an SPWM inverter. These formulas were obtained by minimizing two parameters: the reactive power of the capacitor (capped at 5% of the apparent power of the load) and the ripple of the current flowing through inductance L (capped at 10% of the current supplying the load). The application of these formulas for the calculation of the filter (L-C) of the 180° control inverter in MV is not conclusive. Studies have been carried out to make them applicable. The results show that limiting the current ripple in the inductor to 10% of the load current is a valid assumption and that limiting the reactive power of the capacitor to 5% of the apparent power of the load presents shortcomings. The results also show that setting the inductance L of the filter to Lmaxi and the capacitor C from 35 × Cmaxi to 400 × Cmaxi gives voltage and current THDs that meet the 519 IEEE-2014 standards.

关键词： filter (L-C) THD inverter with 180° control and with SPWM control mathematical iterations MV. MATLAB-SIMULINK

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New Passenger Services in Railway Stations Based on Mode Group Diversity Multiplexing Optical Fiber Communications

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Journal of Civil Engineering and Architecture 2012年第10期6卷 1362-1368页

作者： Dafa loum Charles Tatkeu Iyad Dayoub Marc Heddebaut Jean Michel Rouvaen Univ. Lille Nord de France- F-59000 Lille France IFSTTAR LEOST F-59666 Villeneuve d'Ascq France IEMN DOAE University of Valenciennes and Hainaut Cambrdsis F-59313 Valenciennes Cedex France

Nowadays, because of its wide bandwidth and high communication capability, the optical fiber is more and more used for high data rate transmission of information in railway environments. Conventionally, only one service is sent over the fiber at a time. However, many different services can be simultaneously conveyed in railway stations such as passenger information service, cellular phone, Wi-Fi... The objective of the work proposed in this paper is to demonstrate the potential benefits of transmitting radio signals over fiber in a railway environment. The main idea is to exploit the full capacity of the fiber by transmitting multiple services using the same fiber. Since, different services are operating in different frequency bands; we propose a new multiplexing technique called Mode Group Diversity Multiplexing （MGDM） to ensure the transmission of multiple services using the same fiber, without additional infrastructure. There are numerous advantages of the proposed technique, e.g., faster and reliable data exchange, high resolution video surveillance capability, high data rate information exchange in railway stations. We present, in this paper, the physical characteristics of optical fibers, performance of MGDM multiplexing technique, and the influence of the laser excitation conditions at the entrance of the fiber on the performances of the system.

关键词： Optical fiber passenger services railway station mode group diversity multiplexing.

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Back Illuminated N/P/P<sup>+</sup>Bifacial Silicon Solar Cell under Modulated Short-Wavelength: Determination of Base Optimum Thickness

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Energy and Power Engineering 2021年第5期13卷 207-220页

作者： Mamadou Sall Dianguina Diarisso Mame Faty Mbaye Fall Gora Diop Mor Ndiaye Khady loum Gregoire Sissoko Laboratory of Semiconductors and Solar Energy Physics Department Faculty of Science and Technology Cheikh Anta Diop University Dakar Senegal University Institute of Technology University of Thiès Thiès Sénégal Ecole Polytechnique de Thiès Thiès Sénégal

A bifacial silicon solar cell under monochromatic illumination in frequency modulation by the rear side is being studied for the optimization of base thickness. The density of photogenerated carriers in the base is obtained by resolution of the continuity equation, with the help of boundary conditions at the junction surface (n+/p) and the rear face (p/p+) of the base. For a short wavelength corresponding to a high absorption coefficient, the AC photocurrent density is calculated and represented according to the excess minority carrier’s recombination velocity at the junction, for different modulation frequency values. The expression of the AC recombination velocity of excess minority carriers at the rear surface of the base of the solar cell is then deduced, depending on both, the absorption coefficient of the silicon material and the thickness of the base. Compared to the intrinsic AC recombination velocity, the optimal thickness is extracted and modeled in a mathematical relationship, as a decreasing function of the modulated frequency of back illumination. Thus under these operating conditions, a maximum short-circuit photocurrent is obtained and a low-cost bifacial solar cell can be achieved by reducing material (Si) to elaborate the base thickness.

关键词： Bifacial Silicon Solar Cell AC Recombination Velocity-Base Thickness Short-Wavelength

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