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Velocity Form Calculations of Generalized Oscillator Strengths for 3s→ (3p, 4p, 5p, 6p) Dipole Transitions of Atomic Sodium in Debye Plasma

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Open Journal of Applied Sciences 2024年第6期14卷 1512-1529页

作者： Louis Gomis Clement Diatta Moustapha Sadibou Tall Ibrahima gueye Faye Rama Gomis Yande Diouf mamadou Coulibaly Laboratoire de Physique des Plasmas et de Recherches Interdisciplinaires Departement de Physique Universite Cheikh Anta Diop Dakar Senegal

In this paper, the generalized oscillator strengths (GOSs) of excitations of atomic sodium from ground state to 2p63s0 (3p, 4p, 5p, 6p) states, immersed in Debye plasma, were calculated by using wavefunctions which were obtained numerically from the restricted Hartree-Fock (RHF) equation. This RHF equation employs the local density approach for exchange interactions including plasma Debye screening. Theoretical RHF and random phase approximation with exchange (RPAE) velocity calculations have shown that the GOSs for excitations to 3 s0(3 p,4 p,5 p,6 p)depend on the plasma Debye screening effects, as shown by the reduction in the GOS amplitude with decreasing Debye length λD. The agreement between the present RPAE V results for the transitions 3 s→3 s0(3 p,4 p,5 p)and the length calculations of Martínez-Flores was satisfactory. Correlation effects were found quite to be significant in the vicinity of the maxima of the GOS of the 3 s→3 s0(4 p,5 p,6 p)excitations by using the RPAE V approach. We note the poor influence of many electron correlations on the GOS of (3 s→3 p)transition with the same principal quantum number. Finally, we comment that the RPAE V calculations are useful in investigating electron correlation effects on the transition GOS of atomic sodium planted in Debye plasma. The present velocity results also reveal that the 3 s→3 s0(5p, 6p)transition GOSs tend to be delocalized due to more significant screening effects at Debye lengths λD=20and 30 a.u. for excited subshells 5p and 6p, respectively. We report here novel results of GOS for 3 s→3 s06ptransition obtained from different Debye lengths.

关键词： Plasma Screening Effect Correlation Effect Sodium Atomic Velocity Form GOS Restricted Hatree-Fock Random Phase Approximation with Exchange

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Seasonal Performance of Solar Power Plants in the Sahel Region: A Study in Senegal, West Africa

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Smart Grid and Renewable Energy 2024年第2期15卷 79-97页

作者： Serigne Abdoul Aziz Niang mamadou Simina Drame Astou Sarr Mame Diarra Toure Ahmed gueye Seydina Oumar Ndiaye Kharouna Talla FST D&#233partement de Physique Universit&#233 Cheikh Anta Diop de Dakar Dakar S&#233n&#233gal Laboratoire de Physique de l’Atmosphère et de l’Océan Siméon Fongang Université Cheikh Anta Diop Dakar Sénégal

The main objective of this study is to evaluate the seasonal performance of 20 MW solar power plants in Senegal. The analysis revealed notable seasonal variations in the performance of all stations. The most significant yields are recorded in spring, autumn and winter, with values ranging from 5 to 7.51 kWh/kWp/day for the reference yield and 4.02 to 7.58 kWh/kWp/day for the final yield. These fluctuations are associated with intense solar activity during the dry season and clear skies, indicating peak production. Conversely, minimum values are recorded during the rainy season from June to September, with a final yield of 3.86 kWh/kW/day due to dust, clouds and high temperatures. The performance ratio analysis shows seasonal dynamics throughout the year with rates ranging from 77.40% to 95.79%, reinforcing reliability and optimal utilization of installed capacity. The results of the capacity factor vary significantly, with March, April, May, and sometimes October standing out as periods of optimal performance, with 16% for Kahone, 16% for Bokhol, 18% for Malicounda and 23% for Sakal. Total losses from solar power plants show similar seasonal trends standing out for high loss levels from June to July, reaching up to 3.35 kWh/kWp/day in June. However, using solar trackers at Sakal has increased production by up to 25%, demonstrating the operational stability of this innovative technology compared with the plants fixed panel. Finally, comparing these results with international studies confirms the outstanding efficiency of Senegalese solar power plants, other installations around the world.

关键词： Performance Study Photovoltaic Power Plant Season Variations Senegal

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Contribution of Bone Scintigraphy in the Metastatic Extension Assessment of Prostate Cancer: A Study of 288 Cases in the Nuclear Medicine Department of Idrissa Pouye General Hospital, Dakar

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Open Journal of Biophysics 2024年第2期14卷 79-98页

作者： El Hadji Amadou lamin. Bathily Ousseynou Diop Mamoudou Salif Djigo Gora Thiaw Kalidou gueye Mohamed Chekhma Olatounde Herbert Fachinan Boucar Ndong Omar Ndoye mamadou Mbodj Department of Nuclear Medicine Idrissa Pouye General Hospital (HOGIP) Dakar Senegal Biophysical Laboratory FMPO Cheikh Anta Diop University (UCAD) Dakar Senegal Department of Nuclear Medicine Hospital Dalal Jamm Dakar Senegal

Introduction: Prostate cancer is the most frequently diagnosed male malignancy and the fifth leading cause of cancer death in men worldwide. Since the advent of screening methods such as Prostate Specific Antigen (PSA) assay, digital rectal examination (DRE) and prostate biopsy, its incidence has increased significantly. The aim of our study was to analyse aspects of bone scintigraphy (BS) as part of the metastatic extension assessment of prostate cancer in Senegal. Patients and Methods: This was a retrospective descriptive and analytical study, running from January 1er 2022 to August 31 2023. Patients with histologically confirmed prostate cancer were included. Whole-body scans (WBS) were performed using a dual-head SPECT gamma camera (Mediso Nucline TM Spirit DH-V type), 3 hours after intravenous injection of 8 MBq/kg (555 to 740 MBq) of 99mTc-HMDP. Results: A total of 288 patients with a mean age of 68.37 ± 7.79 years were included. The median total PSA level was 97.6 ng/ml, with 144 patients having a level greater than or equal to 20 ng/ml. All patients had adenocarcinoma, and the Gleason score was available in 202 (70.13%) patients, 75.75% of whom had a score greater than or equal to 7. BS was contributory in 70.48% of cases, with 30.90% positive and 39.58% negative. The result was inconclusive in 85 patients (29.51%). The mean PSA for patients with a positive scan was 190.2 ng/ml and 40.6 ng/ml for those with a negative scan. Multiple metastatic lesions predominated (87.35% of cases). Metastatic lesions occurred preferentially in the axial skeleton, with a proportion of 68% versus 32% in the appendicular skeleton. Classification of bone metastases according to the SOLOWAY score revealed grade I (62.07%), grade II (35.63%) and grade IV (2.30%). Conclusion: In Senegal, prostate cancer is generally diagnosed in men of advanced age. The presence of bone metastases is frequent in its evolution, transforming a curable localized disease into a g

关键词： Prostate Cancer Bone Metastasis Bone Scintigraphy Senegal

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Place of Bone Scintigraphy in the Assessment of Extension and Follow-Up of Breast Cancer in Senegal: Study of 165 Cases in the Nuclear Medicine Department of Idrissa Pouye General Hospital (Dakar)

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Open Journal of Medical Imaging 2024年第1期14卷 10-30页

作者： El Hadji Amadou lamin. Bathily Mamoudou Salif Djigo Djimby Ba Gora Thiaw Ousseynou Diop Kalidou gueye Olatounde Herbert Fachinan Boucar Ndong Omar Ndoye mamadou Mbodj Nuclear Medicine Department Idrissa Pouye General Hospital (HOGIP) Dakar Senegal Biophysics Laboratory FMPO UCAD Dakar Senegal Nuclear Medicine Department Hospital Dalal Jamm Dakar Senegal Nursing and Obstetrics Training Institute Parakou University Parakou Benin

Introduction: Breast cancer is the most common cancer in women worldwide, accounting for an estimated 22% of all female cancers. It is the leading cause of cancer mortality in women, almost all of which is due to metastases, with 73% of metastases occurring in the bone. In oncology, metastable technetium 99-labelled methylene bisphosphonate bone scintigraphy (BS) remains the standard examination for detecting and assessing the extent of bone metastases. The aim of this study was to assess the role of BS in the evaluation and follow-up of breast cancer in Senegal. Methodology: This was a retrospective study of breast cancer patients who underwent bone scintigraphy with 99mTc-HMDP in the nuclear medicine department of Idrissa Pouye General Hospital (IPGHO), from July 2009 to June 2022. Results: We enrolled 165 patients, mean age 46.79 years (27 - 87 years). BS was performed in 94.37% of cases for post-therapeutic monitoring and in 5.63% for pre-therapeutic assessment. Results were contributory in 131 patients (92.25%), of whom 72 cases (50.70%) were normal and 59 cases (41.55%) positive or presenting bone metastases;and non-contributory or doubtful in 11 cases (7.75%). Secondary bone locations were multiple in 57 cases (96.61%) and single or solitary in 2 cases (3.39%). The scintigraphic appearance of bone metastases was hyper-fixative in 58 cases (98.31%) and mixed in 1 case (1.69%). Bone lesions were quantified using the Soloway’s grading classification. Conclusion: BS with 99mTc-labelled bisphosphonates remains the examination of choice for skeletal exploration, in the detection and extension of bone metastases in breast cancer. Performance has been enhanced by the development of SPECT coupled with CT (SPECT-CT).

关键词： Breast Cancer Bone Scintigraphy 99mTc-HMDP Bone Metastases

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Iodine 131 Treatment in Graves’ Disease in a West African Country: Preliminary Study about 25 Cases in Senegal

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Open Journal of Biophysics 2024年第1期14卷 56-72页

作者： El Hadji Amadou lamin. Bathily Serigne Moussa Badiane Mamoudou Salif Djigo Gora Thiaw Kalidou gueye Ousseynou Diop Boucar Ndong Kokou Fofo Toussaint Adambounou Alphonse Rodrigue Djiboune Papa Mady Sy mamadou Soumbounou Mohamed Chekhma Louis Augustin Diaga Diouf Gora Mbaye Omar Ndoye Mounibé Diarra mamadou Mbodj Nuclear Medicine Department General Hospital of Idrissa Pouye (HOGIP) Dakar Senegal Biophysical Laboratory Cheikh Anta Diop University (UCAD) Dakar Senegal Biophysical Laboratory Gaston Berger University (UGB) Saint-Louis Nuclear Medicine Department Hospital Dalal Jamm Dakar Senegal Biophysical Laboratory University of Lome Lome Togo Laboratory of Physical and Pharmaceutical Biophysics Cheikh Anta Diop University Dakar Senegal

Introduction: Graves’ disease is the most common cause of hyperthyroidism. Its treatment uses synthetic antithyroid drugs but the use of aggressive radical therapy such as surgery or non-aggressive therapy such as iodine-131 is not uncommon. Treatment of Graves’ disease with radioactive iodine or iratherapy is a simple, inexpensive, well-tolerated treatment. It was introduced in Senegal in 2016. We report through this work the preliminary assessment of the only nuclear medicine service in Senegal in the management of Graves’ disease by iodine-131. Patients and Methods: Retrospective study of the first cases of Graves’ disease treated with iratherapy in Senegal. Socio-demographic, clinical, paraclinical, therapeutic and evolutionary aspects were studied. Radiation protection rules have been implemented and contraception has been effective for six months in women of childbearing age. Results: 25 patients were collected with a mean age of 45 years, twenty women (80%), a family goiter in 24% and a psycho-affective context in 64% of cases. Thyrotoxicosis syndrome was associated with goiter in 68% of patients and exophthalmos in 64%. Thyroid ultrasound performed in 20 patients showed vascular goiter in 80% and thyroid scintigraphy in 3 patients, homogeneous and diffuse hyperfixation. TRAK dosed in 8 patients was still positive. All patients had received first-line medical treatment. The average duration of this treatment was more than 18 months in 92%. The empirically used iodine-131 activity averaged 15.35 mCi. Oral corticosteroid therapy was prescribed in 7 patients for the prevention of malignant orbitopathy. No early side effects were noted. The remission rate at 3 months was 52% and at 6 months was 88% to 92%. Conclusion: The effectiveness of radioactive iodine, in particular ablative doses in the treatment of hyperthyroidism, is no longer to be demonstrated. Taking into account our socioeconomic context, iratherapy should be a treatment of choice for hyperthyroidism

关键词： Graves’ Disease Iratherapy Iodine-131 Senegal

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Prognosis Factors of Urinary Quality of Life in Parkinson Disease

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Open Journal of Therapy and Rehabilitation 2024年第1期12卷 10-17页

作者： Ngor Side Diagne Sakhi Othman Ababacar mamadou gueye Marie Jeanne Sakho Fatou Dialo Mboup Amélie Ndeye Makarame Sy Papa Ndiouga Lo Ba Seydina Ousmane Anna Modji Basse Maouly Fall Adjaratou Dieynaba Sow Moustapha Ndiaye Amadou Gallo Diop Physical Médicine and Rehabilitation Department Fann Teaching Hospital Dakar Senegal Neurology Department Pikine Hospital Dakar Senegal Physical Médicine and Rehabilitation Department Ibn Rochd Teaching Hospital Casablanca Morocco Physical Médicine and Rehabilitation Department Military Hospital Dakar Senegal Neurology Department Fann Teaching Hospital Dakar Senegal

Introduction: Quality of life in Parkinson disease is not necessary linked to motor symptoms. It’s correlated of overactive bladders and prostatic symptoms. Prognosis factors of urinary quality of life are unknown. Objectives: Our study aims to find prognosis factors of quality of life associated specifically of urinary disorders in PD. Patients and methods: We conducted a transversal, analytic and descriptive study in Physical Medicine, and Neurology departments, Fann Teaching Hospital, Dakar and included patients followed for treatment of PD. Urinary disorders, quality of life and functional autonomy were assessed respectively by Urinary Symptoms Profile (USP), Qualiven Short Form, Schwab and England Scale. Results: 38 patients presented PD, with a mean age of 60.89 ± 13.6 years and sex-ratio of 2.45. Mean duration of PD was 3.1 ± 2.9 years. Urinary disorders were found in 47.36% and dominated by incontinence (88.88%) and overactive bladders (88.88%) which were minor in more than 55%. Quality of life was impaired in 88.88% of cases. Minor forms (43.75%) were predominant and constraint dimension (50%) was the most severely altered. Prognosis factors for quality of life of urinary disorders were PD stages (0.046) and functional autonomy (0.042). Discussion and conclusion: Urinary disorders in PD are common, impaired quality of life, especially the constraint dimension, depends on stage of evolution of PD and functional autonomy of patients.

关键词： Urinary Quality of Life Parkinson Disease Dakar

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Contribution of Bone Scintigraphy in the Diagnosis of a Case of SAPHO in the Nuclear Medicine Department of Idrissa Pouye General Hospital (Dakar, Senegal)

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Open Journal of Medical Imaging 2024年第1期14卷 1-9页

作者： El Hadji Amadou lamin. Bathily Kalidou gueye Serigne Moussa Badiane Mamoudou Salif Djigo Gora Thiaw Ousseynou Diop Olatounde Herbert Fachinan Papa Mady Sy Alfonse Rodrigue Djiboune Kokou Fofo Toussaint Adambounou Louis Augustin Diaga Diouf Boucar Ndong Gora Mbaye Omar Ndoye Mounibé Diarra mamadou Mbodj Nuclear Medicine Department Idrissa Pouye General Hospital (HOGIP) Dakar Senegal Biophysical Laboratory FMPO Cheikh Anta Diop University (UCAD) Dakar Senegal Biophysical Laboratory UFR2S Gaston Berger University (UGB) Saint-Louis Senegal Nuclear Medicine Department Hospital Dalal Jamm Dakar Senegal Laboratory of Physical and Pharmaceutical Biophysics FMPO Cheikh Anta Diop University Dakar Senegal Biophysical Laboratory University of Lome Lome Togo

Introduction: The acronym SAPHO (Synovitis, Acne, Pustulosis, Hyperostosis and Osteitis) is a syndrome combining osteoarticular and cutaneous manifestations. It occurs mainly between the ages of 30 and 50. Sternocostoclavicular hyperostosis is one of the main distinguishing features. We report a case of SAPHO in Dakar diagnosed by bone scintigraphy. Observation: 28-year-old Senegalese women presented with left shoulder pain and relative functional impotence for over 2 years. Examination revealed right sternoclavicular hyperostosis and left shoulder pain on palpation. Questioning revealed a history of acne and hyperostosis of the right first toe. Bone scintigraphy, performed after injection of 630 MBq of 99mTc-HMDP, revealed: hyperfixation of the bilateral (right++) manubrio-sternal and sternoclavicular junction, producing the classic bull’s horn image;hyperfixation of the left shoulder with an inflammatory appearance;hyperfixation of the sacroiliac joints suggestive of bilateral sacroiliitis;hyperfixation of the right first toe;two mandibular hyper fixations probably related to dental damage. This scintigraphic appearance in one was strongly suggestive of SAPHO syndrome. Conclusion: SAPHO syndrome, related to spondyloarthropathy, associates cutaneous and osteoarticular signs. It is characterized by frequent delays in diagnosis due to poor recognition. Soy is an invaluable diagnostic tool, enabling us to assess the extent of the disease and its evolution.

关键词： SAPHO Bone Scintigraphy Young Woman Senegalese

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Performance of the Boost Chopper, Comparative Study between PI Control and Neural Control to Regulate Its Output Voltage

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Smart Grid and Renewable Energy 2023年第5期14卷 73-84页

作者： Ibrahima gueye mamadou Sall Abdoulaye Kebe Laboratoire L3EPI Ecole Superieure Polytechnique Université Cheikh Anta Diop Dakar Senegal

In this study, we investigate the performance of a boost converter regulating its output voltage using two control methods: Proportional-Integral (PI) control and neural control. Both methods are implemented on a simulation platform (Matlab/Simulink) and evaluated in terms of accuracy, response speed, and robustness to disturbances. Indeed, the output voltage of converters exhibits imperfections that require a control method to optimize efficiency when applying a variable load. Results show that neural control offers superior performance in terms of accuracy and response time, with faster and more precise regulation of the output voltage. On the other hand, PI control proves to be more robust against disturbances. These findings can help guide the selection of the appropriate control method for a boost converter based on the specific requirements of each application.

关键词： Chopper PI Control Neural Control

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Solar Controller with Automatic Search Technology for the Maximum Power Point with Autonomy Display

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Energy and Power Engineering 2022年第9期14卷 509-522页

作者： mamadou Sall Ousmane Sow Sega gueye Gora Diop Lemrabott Habiboullah mamadou Wade Gregoire Sissoko Ecole Polytechnique de Thiè s Thi&egrave s S&eacute né gal Institut Universitaire de Technologie. Université Iba Der THIAM de Thi&egrave s S&eacute né gal Groupe International de Recherche en Energie Renouvelable(GIRER) Dakar S&eacute né gal Ecole Supérieure Multinationale de Té lé communication Dakar S&eacute né gal

In our work, we have been interested in conducting technological research on the use of photovoltaic energy for lighting. In fact, we have produced a stand-alone photovoltaic system with automatic search for the maximum power point, consisting of a photovoltaic module, a solar regulator, a storage battery and a digital control by microcontroller. The solar field is connected to the input of the regulator and the battery to its output. When the battery voltage is lower than the regulation voltage, the controller operates the photovoltaic generator at maximum power Pmpp and transfers this power to the output. In addition to the protection function, this regulator ensures tracking of the maximum power point (MPPT) and allows the photovoltaic generator to deliver its power whatever the variation of climatic conditions (sunshine and temperature). The main role of the solar regulator is the continuous monitoring of the state of charge of the battery to ensure its protection against overcharging and excessive discharging, the coupling and decoupling of the user as well as its maintenance. The principle of operation is based on controlling a DC-DC converter by a rectangular “PWM” signal generated by a PIC16F874 microcontroller which also controls the entire system. The results of simulation after realization were presented to illustrate the operation of the regulator by curves.

关键词： Index Terms-Battery Charge/Discharge Regulator PIC16FC874

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Hepatic Artery Aneurysm: An Unusual Cause of Upper Gastrointestinal Bleed in 49 Years Old Patient

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Open Journal of Gastroenterology 2022年第3期12卷 64-70页

作者： Salamata Diallo Alioune Badara Fall mamadou lamin. gueye Marie Louise Bassene mamadou Ngoné gueye Marieme Polele Fall Mame Aissé Thioubou Alsine Yauck Department of Gastroenterology and Hepatology Hospital Aristide Le Dantec Dakar Senegal Department of General Surgery Hospital Aristide Le Dantec Dakar Senegal Department of Gastroenterology and Hepatology Hospital Idrissa Pouye Dakar Senegal Department of Gastroenterology and Hepatology Peace Hospital Ziguinchor Senegal

Hepatic artery aneurysm (HAA) is a rare disease. HAA is generally asymptomatic disease when symptomatic, they usually present with abdominal pain, upper gastrointestinal (GI) bleeding and/or jaundice, hypovolaemia secondary to rupture or GI bleeding with normal GI endoscopy. Surgical repair and endovascular treatment are the two therapeutic options available at present. Case report: A 49-year-old male presented at the emergency department with high gastrointestinal bleeding, abdominal pain and jaundice. Gastroscopy showed an ulcer with flat pigmented haematin on ulcer base (Forrest IIc) that was controlled by medical treatment. CT angiography was done and showed aneurysm of the proper hepatic artery almost totally thrombosed measuring 100 × 59 mm associated with signs of contained rupture. Emergency surgery was indicated. The laparotomy objectified a rupture of the aneurysm in the biliary tree in per operative excision of aneurysm and ligation of the hepatic pedicle was carried out. After surgery, the evolution was favorable with a follow-up of 8 months. Conclusion: HAA rupture is a rare cause of upper GI bleeding. The mortality rate after rupture is relatively high. CT angiography or MRI can diagnose a ruptured of HAA. Urgent surgery should be the first choice in patients with a ruptured HAA with active hemorrhage causing hemorrhagic shock.

关键词： Hepatic Artery Aneurysm Rupture Upper GI Bleeding Surgery

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